Chain combination institutions

Abstract

According to an embodiment of this utility model, an interlocking combination mechanism is applied between a circuit breaker cabinet and an interface cabinet, with both cabinets using the same key. The key cannot be removed in a horizontal position but can be removed in a vertical position. A first lock housing and a second lock housing are provided parallel to the back of the circuit breaker cabinet door, connected by a spring-loaded element. The lock cylinder of the circuit breaker cabinet door lock extends between the first and second lock housings, and a locking plate that rotates in conjunction with the key is provided at the tail of the lock cylinder. A stop is provided on the second lock housing, configured to move with the second lock housing and stop the locking plate and the key in a horizontal position when the circuit breaker is closed. Thus, when the circuit breaker is closed, the key cannot be removed to operate the interface cabinet, avoiding the safety threat posed by simultaneous live operations on both sides.

Description

Technical Field

[0001] This utility model relates to the field of power equipment, and more specifically, to an interlocking combination mechanism for power equipment cabinets. Background Technology

[0002] In power applications, high-voltage operations are often involved, and improper operation can pose a threat to personal safety.

[0003] In existing technologies, interlocking mechanisms are used to interlock different high-voltage cabinets, so that when a user is operating high-voltage electrical equipment in one high-voltage cabinet, they cannot operate high-voltage electrical equipment in another high-voltage cabinet, thus ensuring personal safety. Utility Model Content

[0004] In view of this, the present invention proposes a new interlocking combination mechanism for interlocking and restricting at least two cabinets to ensure safety.

[0005] According to an embodiment of the present invention, an interlocking combination mechanism is applicable to the interlocking control of a circuit breaker cabinet and an interface cabinet. The circuit breaker cabinet and the interface cabinet are respectively provided with a circuit breaker cabinet door panel and an interface cabinet door panel. Each of the circuit breaker cabinet door panel and the interface cabinet door panel is respectively provided with a circuit breaker cabinet door lock and an interface cabinet door lock. The circuit breaker cabinet door lock and the interface cabinet door lock share the same key. The key cannot be removed in a horizontal state but can be removed in a vertical state. A lock housing is provided on the back of the circuit breaker cabinet door panel. The lock housing includes parallel buttresses... A first lock housing near the circuit breaker cabinet door panel and a second lock housing away from the circuit breaker cabinet door panel are movably connected by a spring member. The lock cylinder of the circuit breaker cabinet door lock extends between the first lock housing and the second lock housing. A lock plate is provided at the tail of the lock cylinder. The lock plate rotates in conjunction with the key. A stop member is provided on the second lock housing. The stop member is configured such that when the circuit breaker in the circuit breaker cabinet is closed, the stop member moves with the second lock housing and can stop the lock plate and the key in a horizontal state.

[0006] Furthermore, the circuit breaker is configured such that when the circuit breaker is closed, the circuit breaker moves away from the circuit breaker door panel, and the front panel of the circuit breaker releases the second lock housing, causing the spring member to spring back and move the second lock housing and the stop member to the side of the lock plate.

[0007] Furthermore, the stop member is also configured such that when the circuit breaker trips, the stop member can move with the second lock housing and release the lock plate so that the key and the lock plate can rotate from a horizontal state to a vertical state.

[0008] Furthermore, the circuit breaker is also configured such that when the circuit breaker is tripped, the circuit breaker moves toward the direction of the circuit breaker cabinet door panel, and the front panel of the circuit breaker contacts the second lock housing, causing the elastic member to compress and drive the second lock housing and its stop member away from the lock plate.

[0009] Furthermore, the first lock housing includes a first end plate, and the second lock housing includes a second end plate disposed parallel to the first end plate. The two horizontally opposite sides of the second end plate are provided with a first side plate and a second side plate extending vertically toward the first lock housing. The bottom edge of at least one of the first side plate and the second side plate is provided with the stop member extending horizontally toward the lock cylinder.

[0010] Furthermore, the bottom of the first side plate and the second side plate are respectively provided with a third end plate and a fourth end plate parallel to the first end plate of the first lock shell along a direction away from the lock cylinder, and the elastic member is provided between at least one of the third end plate and the fourth end plate and the first end plate.

[0011] Furthermore, the circuit breaker cabinet door panel is provided with a handwheel and a circuit breaker handle operation hole arranged adjacent to each other vertically; the handwheel extends to the end of the back of the circuit breaker cabinet door panel and is connected to a cam, the cam being configured to rotate with the rotation of the handwheel; the cam is connected to a longitudinally arranged tongue, the tongue being configured to rotate with the rotation of the cam; the tongue is configured such that when the lock plate and the key are rotated to the vertical position, when the tongue rotates to the vertical position with the cam, its upper end is stopped by the lock plate and its lower end blocks the circuit breaker handle operation hole.

[0012] Furthermore, when the lock plate and the key are in a horizontal state, the tongue is configured to rotate to a first oblique angle as the cam rotates, and at the first oblique angle, the lower end of the tongue avoids the circuit breaker handle operating hole so that it is in an operable state.

[0013] Furthermore, the interlocking mechanism also includes a limit switch, an electromagnet, and an electromagnet contact. The cam is connected to the limit switch, and the electromagnet is electrically connected to the limit switch. The electromagnet is configured to be energized when the cam is biased and presses down on the limit switch. The interface cabinet door lock is provided with a latch plate, and the latch plate is provided with an electromagnet contact. The electromagnet contact is configured to be attracted and locked by the energized electromagnet. The latch plate is configured to prevent the key inserted in the interface cabinet door lock from turning when locked.

[0014] As can be seen, the interlocking combination mechanism according to this utility model embodiment is applied between a circuit breaker cabinet and an interface cabinet, and the door locks of the two cabinets use the same key. The key cannot be pulled out in a horizontal state, but can be pulled out in a vertical state. A first lock shell and a second lock shell are provided on the back of the circuit breaker cabinet door, parallel to the door. The first and second lock shells are movably connected by a spring member. The lock cylinder of the circuit breaker cabinet door lock extends between the first and second lock shells, and the tail of the lock cylinder is provided with a lock plate that rotates in conjunction with the key. A stop member is provided on the second lock shell. The stop member is configured such that when the circuit breaker is closed, it moves with the second lock shell and can stop the lock plate and the key in a horizontal state. Thus, when the circuit breaker is closed, the key cannot be pulled out to operate the interface cabinet, avoiding the safety threat caused by simultaneous live operation from both sides.

[0015] Furthermore, the stop is configured to move with the second lock housing and release the lock plate when the circuit breaker trips, allowing the key and the lock plate to rotate from a horizontal to a vertical position. This allows the key to be removed to operate the interface cabinet door lock while also preventing simultaneous live operation from both sides.

[0016] In addition, a cam mechanism and a tongue are provided. When the circuit breaker is in the open state and the key can be removed to operate the interface cabinet, the tongue is blocked by the locking plate and cannot be rotated to an angle, thereby blocking the circuit breaker operating hole and preventing the circuit breaker operating rod from being inserted to switch the circuit breaker to the closed state, thus avoiding simultaneous operation of both sides. Attached Figure Description

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram showing the circuit breaker cabinet in the closed state of the interlocking combination mechanism according to an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram showing the circuit breaker cabinet in the open state of the interlocking combination mechanism according to an embodiment of the present utility model.

[0020] Figure 3 A partial structural schematic diagram of the interlocking combination mechanism located on the circuit breaker cabinet door panel according to an embodiment of the present utility model is shown.

[0021] Figure 4 It shows that according to Figure 3 Exploded view of the interlocking combination mechanism located on the door panel of the circuit breaker cabinet;

[0022] Figure 5 This describes the state of the locking plate of the interlocking combination mechanism according to an embodiment of the present invention when it is stopped by a stopper.

[0023] Figure 6 A schematic diagram showing the state in which the tongue of the interlocking mechanism according to an embodiment of the present invention blocks the operating hole of the circuit breaker handle;

[0024] Figure 7 A schematic diagram showing the state in which the tongue of the interlocking combination mechanism according to the present invention does not block the operating hole of the circuit breaker handle is shown.

[0025] Figure 8 A schematic diagram of the interlocking combination mechanism located in the interface cabinet portion according to another embodiment of the present invention is shown;

[0026] Figure 9 A diagram showing the working state of an interlocking mechanism according to another embodiment of the present invention is provided.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1. Circuit breaker cabinet door panel 2 Interface cabinet door panel 3 Circuit breaker cabinet door lock 5 First Lock Case 7 Second Lock Case 9 elastic components 10 lock cylinders 11 locking plate 13 Stoppers 15 circuit breakers 17 handwheel 20 Circuit breaker handle operating hole 22 Cam 24 tongue slices 26 Limit Switch 28 electromagnets 30 Electromagnetic Contacts 32 locking tongue plate 33 Interface cabinet door lock 52 Second end plate 61 First side plate 62 Second side plate 73 Third end plate 74 Fourth end plate Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the following embodiments will be used to further describe this utility model in detail.

[0030] Figure 1 This is a schematic diagram showing the circuit breaker cabinet in the closed state of the interlocking combination mechanism according to an embodiment of the present utility model. Figure 2 This is a schematic diagram showing the circuit breaker cabinet in the open state of the interlocking combination mechanism according to an embodiment of the present utility model.

[0031] like Figure 1 As shown, the circuit breaker cabinet is equipped with a circuit breaker cabinet door panel 1, on which a customized circuit breaker cabinet door lock 3 is installed. A circuit breaker 15 is installed inside the cabinet. An interface cabinet (not shown) is used to connect different test prototype systems. The interface cabinet includes an interface cabinet door panel 2 and an interface cabinet door lock 33 mounted on the door panel 2. The interface cabinet door lock 33 and the circuit breaker cabinet door lock 3 share the same key. The circuit breaker 15 is, for example, a handcart-type circuit breaker, and its operating state can be switched by inserting a handle through the circuit breaker handle operation hole 20 on the circuit breaker cabinet door panel 1. Figure 1 As shown, when the circuit breaker is closed and enters the working position, it will move away from the circuit breaker cabinet door 1, thus separating from the circuit breaker cabinet door 1; as Figure 2 As shown, when the circuit breaker is in the non-operating position, it will move towards the circuit breaker cabinet door 1 and thus come into contact with the circuit breaker cabinet door 1.

[0032] Figure 3 A partial structural schematic diagram of the interlocking combination mechanism located on the circuit breaker cabinet door panel 1 according to an embodiment of the present utility model is shown; Figure 4 It shows that according to Figure 3 Exploded view of the interlocking combination mechanism located on the circuit breaker cabinet door panel 1;

[0033] like Figure 3 and Figure 4 As shown, the interlocking combination mechanism located on the circuit breaker cabinet door panel 1 includes a first lock housing 5 positioned parallel to the circuit breaker cabinet door panel 1 and a second lock housing 7 positioned away from the circuit breaker cabinet door panel 1. The first lock housing 5 and the second lock housing 7 are movably connected by a spring member 9. The lock cylinder 10 of the circuit breaker cabinet door lock 3 extends between the first lock housing 5 and the second lock housing 7. The tail of the lock cylinder 10 is also connected to a lock plate 11 via a coaxial connector. The lock plate 11 rotates in conjunction with the key; that is, when the key rotates, it drives the lock plate 11 to rotate, and when the lock plate 11 rotates, it also drives the key to rotate. When the key is rotated to a horizontal position, the lock plate 11 is also rotated to a horizontal position; when the key is rotated to a vertical position, the lock plate 11 is also rotated to a vertical position. Furthermore, the circuit breaker cabinet door lock 3 is configured such that it cannot be pulled out when the key is in a horizontal position, but can be pulled out when the key is in a vertical position. The second lock housing 7 is provided with a stop member 13, which is configured to move with the second lock housing 7 when the circuit breaker is closed and to stop the lock plate 11 and the key in a horizontal state.

[0034] Based on the above embodiments, when the circuit breaker switches to the working state, the interlocking combination mechanism can stop the lock plate 11 and the key in a horizontal state, thereby preventing the key from being pulled out and used to open the interface cabinet door lock 33 for operation, thus ensuring operational safety.

[0035] Furthermore, the circuit breaker is configured such that when the circuit breaker is closed, it moves away from the circuit breaker cabinet door panel 1, and the front panel of the circuit breaker releases the second locking housing 7, causing the spring member 9 to spring back and move the second locking housing 7 and the stop member 13 to the side of the locking plate 11. Specifically, when the circuit breaker is closed and thus moves away from the second locking housing 7, the spring member 9 springs open, causing the stop member 13 on the second locking housing 7 to move away from the circuit breaker cabinet door panel 1 and closer to the locking plate 11, thereby stopping the locking plate 11, which is currently in a horizontal state.

[0036] Furthermore, the stop member 13 is also configured such that when the circuit breaker trips, the stop member 13 can move with the second lock housing 7 and release the lock plate 11, allowing the key and the lock plate 11 to rotate from a horizontal state to a vertical state. Based on this embodiment, when the circuit breaker trips, the second lock housing 7 can move the stop member 13 away from the lock plate 11, thus no longer stopping the lock plate 11. At this time, the key can be turned, and when it is turned to a vertical state, the key can be pulled out to operate the interface cabinet door lock 33.

[0037] Furthermore, the circuit breaker is configured such that when the circuit breaker is tripped, it moves towards the circuit breaker cabinet door 1, and the front panel of the circuit breaker contacts the second lock housing 7, causing the elastic member 9 to compress and move the second lock housing 7 and its stop member 13 away from the locking plate 11. Specifically, when the circuit breaker trolley is moved to the tripped position, the circuit breaker cabinet door 1 approaches and contacts the second lock housing 7, causing the elastic member 9 to compress and move the second lock housing 7 and the stop member 13 provided on the second lock housing 7 away from the locking plate 11, thus no longer stopping the locking plate 11.

[0038] Based on the above embodiments, the elastic element 9 can be a spring.

[0039] According to the interlocking mechanism of this utility model embodiment, the first lock housing 5 includes a first end plate, and the second lock housing 7 includes a second end plate 52 disposed parallel to the first end plate. A first side plate 61 and a second side plate 62 are disposed on the horizontally opposite sides of the second end plate 52 extending perpendicularly toward the first lock housing 5. The bottom edge of at least one of the first side plate 61 and the second side plate 62 extends horizontally toward the lock cylinder 10, and a stop member 13 is disposed thereon. Based on this structure, a stop member 13 is provided that can stop and release the lock plate 11.

[0040] Based on the above embodiments, one or more stop members 13 can be provided to stop a pair of locking plates 11.

[0041] Furthermore, based on the above embodiments, the bottoms of the first side plate 61 and the second side plate 62 are respectively provided with a third end plate 73 and a fourth end plate 74 parallel to the first end plate of the first lock housing 5 along a direction away from the lock cylinder 10. The elastic member 9 is disposed between at least one of the third end plate 73 and the fourth end plate 74 and the first end plate. Based on this structure, the elastic member 9 is reasonably arranged so that a relative displacement occurs between the lock plate 11 and the stop member 13, thereby stopping or releasing the lock for a time period. This solution has a simple structure and saves space.

[0042] Figure 5This describes the state of the locking piece 11 of the interlocking combination mechanism according to an embodiment of the present invention when it is stopped by the stop member 13;

[0043] like Figure 5 As shown, when the stop 13 moves to a position close to the lock plate 11 and holds it in a horizontal position, the key cannot be turned and cannot be pulled out.

[0044] Furthermore, according to the interlocking mechanism of this utility model embodiment, a handwheel 17 and a circuit breaker handle operation hole 20 are arranged adjacently on the circuit breaker cabinet door panel 1; a cam 22 is connected to the end of the handwheel 17 extending to the back of the circuit breaker cabinet door panel 1, and the cam 22 is configured to rotate with the rotation of the handwheel 17; the cam 22 is connected to a longitudinally arranged tongue 24, and the tongue 24 is configured to rotate with the rotation of the cam 22; the tongue 24 is configured such that when the locking plate 11 and the key are rotated to the vertical state, when the tongue 24 rotates to the vertical state with the cam 22, its upper end is stopped by the locking plate 11, and its lower end blocks the circuit breaker handle operation hole 20.

[0045] Figure 6 A schematic diagram showing the state in which the tongue of the interlocking combination mechanism according to an embodiment of the present invention blocks the circuit breaker handle operation hole 20;

[0046] When the circuit breaker trolley is turned to the non-operating position, the circuit breaker panel presses against the second lock housing 7, and the stop 13 does not stop the lock plate 11. The key can then be turned from the horizontal position to the vertical position. At this time, the key can be removed to open the interface cabinet door lock and operate the equipment inside the interface cabinet. To avoid both sides being in the working state at the same time, when the lock plate 11 is turned to the vertical position, the lock plate 11 stops the upper end of the tongue plate, preventing it from continuing to rotate and forming an angle. This causes the lower end of the tongue plate to completely block the circuit breaker handle operating hole 20. Therefore, the operator cannot operate the circuit breaker trolley to turn it in, thus avoiding the risk caused by operating both sides at the same time.

[0047] Figure 7The diagram shows the state in which the tongue of the interlocking combination mechanism according to this utility model does not block the circuit breaker handle operating hole 20. When the circuit breaker trolley is turned to the working position, the front panel of the circuit breaker releases the second lock housing 7, and the stop member 13 moves with the second lock housing 7 to the position of stopping the lock plate 11. At this time, the key and the lock plate 11 are in a horizontal state. At this time, the key cannot be removed to open the interface cabinet door lock 33 to operate the equipment inside the interface cabinet; therefore, it is safe to operate the circuit breaker at this time. At this time, since the lock plate 11 is in a horizontal state and does not stop the upper end of the tongue, when the operator turns the handwheel 17, causing the cam 22 to rotate and thus drive the tongue to rotate to the first oblique angle, the lower end of the tongue successfully avoids the circuit breaker operating hole, allowing the operator to insert the operating rod to operate the circuit breaker.

[0048] If in Figure 7 In the current state, when the operator inserts the operating lever to operate the circuit breaker to the working state, the circuit breaker will release the second lock housing 7, causing the stop 13 of the second lock housing 7 to no longer abut against the lock plate 11. At this time, the key can be turned to the vertical position and pulled out, which poses a safety hazard of using the key to operate the equipment in the interface cabinet. To solve this problem, this utility model also provides an interlocking combination mechanism according to another embodiment. Figure 8 A schematic diagram of the interlocking combination mechanism located in the interface cabinet portion according to another embodiment of the present invention is shown; Figure 9 A diagram showing the working state of an interlocking mechanism according to another embodiment of the present invention is provided.

[0049] like Figure 8 As shown and Figure 9 As shown, the interlocking mechanism also includes a limit switch 26, an electromagnet 28, and an electromagnet contact 30. The cam 22 is connected to the limit switch 26, and the electromagnet 28 is electrically connected to the limit switch 26. The electromagnet is configured to be energized when the cam 22 is biased and presses down the limit switch 26. The interface cabinet door lock 33 is provided with a latch plate 32, and the latch plate 32 is provided with an electromagnet contact 30. The electromagnet contact 30 is configured to be attracted and locked by the energized electromagnet. The latch plate 32 is configured to prevent the key inserted in the interface cabinet door lock 33 from turning when locked.

[0050] Based on this embodiment, it can prevent the key from being pulled out to open the interface cabinet door lock 33 and come into contact with live parts when the circuit breaker operating hole is not closed, thereby further improving safety.

[0051] It should be noted that, in this embodiment, the technical means of how to set the electromagnet contact 30 in the locking tongue plate 32, how to make the electromagnet contact 30 jam the locking tongue plate 32 when it is attracted by the electromagnet, and how to make the key unable to turn when the locking tongue plate 32 is jammed are well known to those skilled in the art. They can be known by those skilled in the art without creative labor, and are not limited here.

[0052] According to the embodiments of this utility model, the circuit breaker cabinet and interface cabinet can be replaced with other similar power cabinets. As long as the interlocking combination mechanism of this utility model can achieve a similar safety guarantee as described above, it should be regarded as having the same protection scope as this utility model.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Interlocking combination mechanism, suitable for interlocking control of circuit breaker cabinets and interface cabinets, wherein, The circuit breaker cabinet and the interface cabinet are respectively provided with a circuit breaker cabinet door panel (1) and an interface cabinet door panel (2). The circuit breaker cabinet door panel (1) and the interface cabinet door panel (2) are respectively provided with a circuit breaker cabinet door lock (3) and an interface cabinet door lock (33). The circuit breaker cabinet door lock (3) and the interface cabinet door lock (33) share the same key. The key cannot be pulled out when it is horizontal and can be pulled out when it is vertical. A lock shell is provided on the back of the circuit breaker cabinet door panel (1). The lock shell includes a first lock shell (5) that is close to the circuit breaker cabinet door panel (1) and a second lock shell that is far away from the circuit breaker cabinet door panel (1) and are arranged parallel to each other. (7) The first lock shell (5) and the second lock shell (7) are movably connected by a spring member (9). The lock cylinder (10) of the circuit breaker cabinet door lock (3) extends between the first lock shell (5) and the second lock shell (7). The tail of the lock cylinder (10) is provided with a lock plate (11). The lock plate (11) rotates in conjunction with the key. The second lock shell (7) is provided with a stop member (13). The stop member (13) is configured such that when the circuit breaker (15) in the circuit breaker cabinet is closed, the stop member (13) moves with the second lock shell (7) and can stop the lock plate (11) and the key in a horizontal state.

2. The interlocking combination mechanism according to claim 1, characterized in that, The circuit breaker (15) is configured such that when the circuit breaker (15) is closed, the circuit breaker (15) moves away from the circuit breaker door panel, and the front panel of the circuit breaker releases the second lock housing (7) so that the spring member (9) rebounds and drives the second lock housing (7) and the stop member (13) to move to the side of the lock plate (11).

3. The interlocking combination mechanism according to claim 1, characterized in that, The stop (13) is also configured such that when the circuit breaker (15) trips, the stop (13) can move with the second lock housing (7) and release the lock plate (11) so that the key and the lock plate (11) can rotate from a horizontal state to a vertical state.

4. The interlocking combination mechanism according to claim 2, characterized in that, The circuit breaker (15) is also configured such that when the circuit breaker (15) is tripped, the circuit breaker moves toward the circuit breaker cabinet door panel (1), and the front panel of the circuit breaker contacts the second lock housing (7), causing the elastic member (9) to compress and drive the second lock housing (7) and its stop member (13) away from the lock plate (11).

5. The interlocking combination mechanism according to claim 1, characterized in that, The first lock housing (5) includes a first end plate, and the second lock housing (7) includes a second end plate (52) arranged parallel to the first end plate. The two horizontally opposite sides of the second end plate (52) are provided with a first side plate (61) and a second side plate (62) extending vertically toward the first lock housing (5). The bottom edge of at least one of the first side plate (61) and the second side plate (62) is provided with the stop member (13) extending horizontally toward the lock cylinder (10).

6. The interlocking combination mechanism according to claim 5, characterized in that, The bottom of the first side plate (61) and the second side plate (62) are respectively provided with a third end plate (73) and a fourth end plate (74) parallel to the first end plate of the first lock shell (5) in a direction away from the lock cylinder (10). The elastic member (9) is provided between at least one of the third end plate (73) and the fourth end plate (74) and the first end plate.

7. The interlocking combination mechanism according to claim 1, characterized in that, The circuit breaker cabinet door panel (1) is provided with a handwheel (17) and a circuit breaker handle operation hole (20) arranged vertically on both sides; the handwheel (17) extends to the end of the back of the circuit breaker cabinet door panel (1) and is connected to a cam (22), the cam (22) is configured to rotate with the rotation of the handwheel (17); the cam (22) is connected to a longitudinally arranged tongue (24), the tongue (24) is configured to rotate with the rotation of the cam (22); the tongue (24) is configured such that when the lock plate (11) and the key are rotated to the vertical position, when the tongue rotates to the vertical position with the cam (22), its upper end is stopped by the lock plate (11) and its lower end blocks the circuit breaker handle operation hole (20).

8. The interlocking combination mechanism according to claim 7, characterized in that, When the lock plate (11) and the key are in a horizontal state, the tongue is configured to rotate to a first oblique angle as the cam (22) rotates, and at the first oblique angle, the lower end of the tongue avoids the circuit breaker handle operation hole (20) so that it is in an operable state.

9. The interlocking combination mechanism according to claim 8, characterized in that, The interlocking mechanism also includes a limit switch (26), an electromagnet (28), and an electromagnet contact (30). The cam (22) is connected to the limit switch (26), and the electromagnet (28) is electrically connected to the limit switch (26). The electromagnet (28) is energized when the cam (22) is biased and presses down the limit switch (26). The interface cabinet door lock (33) is provided with a latch plate (32). The latch plate (32) is provided with an electromagnet contact (30). The electromagnet contact (30) is configured to be attracted and locked by the energized electromagnet (28). The latch plate (32) is configured to prevent the key inserted in the interface cabinet door lock (33) from turning when locked.

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