Door interlocking mechanism of power distribution cabinet

Abstract

The utility model discloses a door interlocking mechanism of a power distribution cabinet, which comprises a test door interlocking mechanism and a cabinet door interlocking mechanism, the test door interlocking mechanism realizes interlocking between an operating mechanism and a test door, and the cabinet door interlocking mechanism realizes interlocking between the operating mechanism and a cabinet door; the test door is provided with a lock plate and a lock tongue. A cam and a crank arm are arranged on an operating shaft of the operating mechanism; a bolt and an interlocking plate assembly are arranged on the test door interlocking mechanism, one end of the bolt is matched with the cam to realize interlocking, and the other end is matched with the locking plate to realize interlocking; the interlocking plate assembly is provided with a first shielding part and a locking part, the first shielding part is matched with the operation shaft to achieve interlocking, and the locking part is matched with the spring bolt to achieve interlocking. According to the utility model, the interlocking mechanisms are respectively arranged between the operating mechanism and the test door as well as between the operating mechanism and the cabinet door for interlocking, and the operating shaft can be operated only after the interlocking mechanism of the test door and the interlocking mechanism of the cabinet door are locked, so that the safety and reliability of operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a door interlocking mechanism for a power distribution cabinet. Background Technology

[0002] Distribution cabinets are widely used in distribution stations and prefabricated substations in load centers such as urban residential communities, high-rise buildings, large public buildings, and factories.

[0003] In some distribution cabinets, in addition to the conventional cabinet doors, there are also test doors. In existing distribution cabinet structures with test doors, in order to ensure operational safety, an interlocking structure is usually installed between the operating mechanism and the cabinet door. However, the interlocking between the operating mechanism and the test door is often quite complex or cannot completely ensure that the mechanism can only be operated when the door is closed and locked, which affects safety and reliability. Utility Model Content

[0004] In response to the shortcomings of existing distribution cabinets with test doors, the applicant provides a door interlocking mechanism for a distribution cabinet with a reasonable structure. Interlocking structures are set between the operating mechanism and the test door and the cabinet door respectively. After the door is closed, the test door lock must be locked in place before the operating shaft of the mechanism can be operated, thereby improving safety and reliability.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A door interlocking mechanism for a power distribution cabinet includes a test door interlocking mechanism and a cabinet door interlocking mechanism. The test door interlocking mechanism interlocks the operating mechanism with the test door, and the cabinet door interlocking mechanism interlocks the operating mechanism with the cabinet door. The test door is equipped with a locking plate and a locking tongue. The operating shaft of the operating mechanism is equipped with a cam and a crank arm. The test door interlocking mechanism is equipped with a pin and an interlocking plate assembly, which are vertically movable on the operating mechanism. One end of the pin engages with the cam for interlocking, and the other end engages with the locking plate for interlocking. The interlocking plate assembly is equipped with a first blocking part and a locking part. The first blocking part engages with the operating shaft for interlocking, and the locking part engages with the locking tongue for interlocking. The cabinet door interlocking mechanism is equipped with a second blocking part that engages with the operating shaft for interlocking, and an interlocking component that engages with the crank arm for interlocking.

[0007] As a further improvement to the above technical solution:

[0008] The interlocking plate assembly of the test door interlocking mechanism includes an interlocking baffle and a transmission plate. The interlocking baffle is connected to the transmission plate. The interlocking baffle is movably mounted on the operating mechanism, and the transmission plate is movably mounted on the cabinet plate. The first blocking part is mounted on the interlocking baffle, and the locking part is mounted on the transmission plate.

[0009] The interlocking baffle has a slot, and the transmission plate has an insertion part that is inserted into the slot.

[0010] The cabinet panel is connected to a guide component, and the transmission plate can move up and down and can be set on the guide component. An interlocking spring connects the transmission plate and the guide component.

[0011] The lock plate has a lock hole. When locked, the pin is inserted into the lock hole. When unlocked, the pin is removed from the lock hole. The pin is equipped with a spring component. One end of the spring component is fixed to the pin and the other end is connected to the partition inside the distribution cabinet.

[0012] The test door interlocking mechanism is equipped with a first base, which is fixed on the mounting plate of the operating mechanism. The latch and interlocking plate assembly are movably mounted on the first base.

[0013] The cabinet door interlocking mechanism is equipped with an interlocking plate, which is movable up and down on the operating mechanism. The second blocking part is set on the interlocking plate. The interlocking component that cooperates with the crank arm on the cabinet door interlocking mechanism is a reversing lever. The reversing lever is rotatably connected to the operating mechanism. One end of the reversing lever is inserted into the interlocking plate, and the other end cooperates with the crank arm.

[0014] The reversing lever is connected to the operating mechanism via a lever pin; a limit groove is provided on the interlocking plate, and a corresponding limit pin is provided on the reversing lever, which is inserted into the limit groove; when the interlocking plate moves up and down, the reversing lever can be driven to rotate around the lever pin through the limit pin.

[0015] The cabinet door interlocking mechanism is equipped with a second seat, which is fixed on the mounting plate of the operating mechanism. The interlocking plate is movably mounted on the guide shaft of the second seat. An interlocking spring is installed between the interlocking plate and the second seat, and a door connecting rod is connected to the interlocking plate.

[0016] The second blocking part of the cabinet door interlocking mechanism is located in front of the first blocking part of the test door interlocking mechanism, and there is a distance between them; the cam and the crank arm are independent parts, or the cam and the crank arm are integrally formed on the same part.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model sets up interlocking mechanisms between the operating mechanism and the test door and cabinet door respectively. When one or both of the test door interlocking mechanism and the cabinet door interlocking mechanism are unlocked, the operating shaft cannot be operated. Only when both the test door interlocking mechanism and the cabinet door interlocking mechanism are locked can the operating shaft be operated, thus improving the safety and reliability of the operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention in the locked state.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention in the unlocked state.

[0021] Figure 3 This is a schematic diagram of the door interlocking mechanism for testing purposes; it is currently in the locked state.

[0022] Figure 4 This is a schematic diagram of the door interlocking mechanism for testing purposes; it is currently in the unlocked state.

[0023] Figure 5 This is a schematic diagram of the upper interlocking assembly.

[0024] Figure 6 This is a schematic diagram of the lower interlocking assembly.

[0025] Figure 7 This is a schematic diagram of the locking plate.

[0026] Figure 8 This is a schematic diagram of the cabinet door interlocking mechanism, which is currently in the locked state.

[0027] Figure 9 This is a schematic diagram of the cabinet door interlocking mechanism, which is currently in the unlocked state.

[0028] In the diagram: 100, test door; 101, lock plate; 102, lock tongue; 1011, lock hole; 200, cabinet door; 300, cabinet panel; 400, cabinet interior partition;

[0029] 1. Operating mechanism; 11. Mounting plate; 12. Operating shaft; 13. Cam; 14. Crank arm;

[0030] 2. Test the door interlocking mechanism; 2-1. Upper interlocking assembly; 2-2. Lower interlocking assembly; 21. First base; 22. Pin; 23. Interlocking baffle; 231. First blocking part; 232. Slot; 24. Compression spring assembly; 25. Transmission plate; 251. Insertion part; 252. Locking part; 26. Guide part; 27. Interlocking spring;

[0031] 3. Cabinet door interlocking mechanism; 31. Second seat; 32. Interlocking plate; 321. Second blocking part; 322. Limiting groove; 33. Guide shaft; 34. Door connecting rod; 35. Interlocking compression spring; 36. Reversing lever; 37. Lever pin; 38. Limiting pin. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] like Figure 1 , Figure 2As shown, the door interlocking mechanism of this utility model is applicable to a power distribution cabinet equipped with a test door 100 and a cabinet door 200. The power distribution cabinet is equipped with an operating mechanism 1, a test door interlocking mechanism 2 is provided between the operating mechanism 1 and the test door 100, and a cabinet door interlocking mechanism 3 is provided between the operating mechanism 1 and the cabinet door 200.

[0034] The operating shaft 12 of the operating mechanism 1 passes through the mounting plate 11. A cam 13 and a crank arm 14 are provided on the operating shaft 12. The test door interlocking mechanism 2 cooperates with the operating shaft 12 and the cam 13 to achieve interlocking. The cabinet door interlocking mechanism 3 cooperates with the operating shaft 12 and the crank arm 14 to achieve interlocking. The cam 13 and the crank arm 14 can be two independent parts, or they can be integrally formed on the same part.

[0035] like Figures 1 to 4 As shown, the test door interlocking mechanism 2 includes an upper interlocking component 2-1 and a lower interlocking component 2-2 connected thereto. The upper interlocking component 2-1 is located between the test door 100 and the operating mechanism 1, and the lower interlocking component 2-2 is located inside the test door 100.

[0036] like Figures 1 to 5 As shown, the upper interlocking assembly 2-1 includes a first base 21, a pin 22, an interlocking baffle 23, and a spring component 24. The first base 21 is fixedly connected to the mounting plate 11 of the operating mechanism 1. The pin 22 and the interlocking baffle 23 are arranged side by side and are inserted into the corresponding mounting holes of the first base 21, which can move up and down. The spring component 24 is located at the lower part of the pin 22. One end of the spring component 24 is fixed to the pin 22, and the other end is connected to the cabinet partition 400 of the distribution cabinet. The top end of the pin 22 cooperates with the cam 13, and the lower end passes through the cabinet partition 400 and extends downward to the inside of the test door 100. A locking piece 101 is provided on the inside of the test door 100, corresponding to the pin 22. Figure 7 As shown, a lock hole 1011 is provided on the lock plate 101; as Figure 1 , Figure 3 As shown, in the locked state, the convex top of the cam 13 rotates to the position abutting the top of the pin 22, the pin 22 moves down, and the lower end of the pin 22 inserts into the lock hole 1011 of the lock plate 101, locking the test door 100. The compression spring component 24 is compressed, and the test door 100 cannot be opened at this time; Figure 2 , Figure 4As shown, in the unlocked state, the bald head of the cam 13 moves away from the top of the pin 22, and the pin 22 moves upward under the elastic force of the spring component 24. The lower end of the pin 22 moves out of the lock hole 1011 of the lock plate 101, releasing the lock on the test door 100. At this time, the test door 100 can be opened. The upper end of the interlocking baffle 23 extends towards the operating shaft 12 and is provided with a first blocking part 231. The first blocking part 231 cooperates with the operating shaft 12 to achieve interlocking. The lower end of the interlocking baffle 23 is provided with a slot 232 for connecting the lower interlocking assembly 2-2.

[0037] like Figures 1 to 4 , Figure 6 As shown, the lower interlocking assembly 2-2 includes a transmission plate 25, a guide 26, and an interlocking spring 27. The guide 26 is fixedly connected to the cabinet panel 300 of the distribution cabinet. The transmission plate 25 can move up and down and is mounted on the guide 26. The interlocking spring 27 connects the transmission plate 25 and the guide 26. The transmission plate 25 has an insertion part 251, which is inserted into the slot 232 of the interlocking baffle 23. The transmission plate 25 and the interlocking baffle 23 are connected to form the interlocking plate assembly. The transmission plate 25 has a locking part 252, and the switch lock of the test door 100 has a corresponding locking tongue 102. The locking tongue 102 cooperates with the locking part 252 to achieve interlocking. Figure 1 , Figure 3 As shown, in the locked state, the latch 102 rotates to the position abutting against the locking part 252, the transmission plate 25 moves down, pulling down the interlocking baffle 23, the first blocking part 231 of the interlocking baffle 23 moves away from the front of the operating shaft 12, releasing its obstruction of the operating shaft 12, and the interlocking spring 27 is stretched; as Figure 2 , Figure 4 As shown, in the unlocked state, the locking tongue 102 moves away from the locking part 252, the transmission plate 25 moves upward under the elastic force of the interlocking spring 27, and pushes the interlocking baffle 23 upward. The first blocking part 231 of the interlocking baffle 23 moves upward to block the operation shaft 12 in front of it and blocks the operation path of the operation shaft 12.

[0038] like Figure 1 , Figure 3 , Figure 8 , Figure 9As shown, the cabinet door interlocking mechanism 3 includes a second base 31, an interlocking plate 32, a guide shaft 33, a door connecting rod 34, an interlocking spring 35, and a reversing lever 36. The second base 31 is fixedly connected to the mounting plate 11 of the operating mechanism 1. The guide shaft 33 is fixed to the second base 31. The interlocking plate 32 is movably mounted on the guide shaft 33. An interlocking spring 35 is provided between the interlocking plate 32 and the second base 31. The door connecting rod 34 is fixedly connected to the interlocking plate 32 and can move up and down with the interlocking plate 32. The reversing lever 36 is rotatably connected to the second base 31 through a lever pin 37. The lever pin 37 is located in the middle of the reversing lever 36. One end of the reversing lever 36 is a plug-in part that is inserted into the interlocking plate 32. The other end of the reversing lever 36 is an interlocking part that cooperates with the crank arm 14 to achieve interlocking. The lower end of the door linkage 34 passes through the test door 100 and extends downward to the inside of the cabinet door 200, where it engages with corresponding components inside the cabinet door 200 to achieve interlocking. A second blocking part 321 extends from the interlocking plate 32 towards the operating shaft 12. The second blocking part 321 engages with the operating shaft 12 to achieve interlocking. The second blocking part 321 is located in front of the first blocking part 231 of the interlocking baffle 23, and is a certain distance away from the first blocking part 231 to avoid interfering with the movement of the interlocking baffle 23. A limiting groove 322 is formed on the interlocking plate 32 facing the reversing lever 36. A corresponding limiting pin 38 is provided on the reversing lever 36. The limiting pin 38 is inserted into the limiting groove 322 of the interlocking plate 32. When the interlocking plate 32 moves up and down, the limiting pin 38 can drive the reversing lever 36 to rotate around the lever pin 37. Figure 1 , Figure 8 As shown, in the locked state, the door linkage 34 and interlocking plate 32 move downward under the gravity of the cabinet door 200, the interlocking spring 35 is compressed, and the second blocking part 321 of the interlocking plate 32 moves away from the front of the operating shaft 12, releasing its obstruction of the operating shaft 12. The interlocking plate 32 drives the connecting part of the reversing lever 36 to swing downward through the limiting pin 38, and the interlocking part of the reversing lever 36 tilts upward, rotating the operating shaft 12 to open the circuit breaker, driving the interlocking arm of the crank arm 14 to rotate below the interlocking part of the reversing lever 36, blocking the movement path of the reversing lever 36; as Figure 2 , Figure 9 As shown, in the unlocked state, the interlocking arm of the crank arm 14 moves away from below the interlocking part of the reversing lever 36. After the cabinet door 200 is removed, the interlocking plate 32 moves upward under the elastic force of the interlocking spring 35. The second blocking part 321 of the interlocking plate 32 moves upward to block the operation path of the operating shaft 12 in front of it. The interlocking plate 32 drives the connecting part of the reversing lever 36 to tilt upward through the limiting pin 38, and the interlocking part of the reversing lever 36 swings downward.

[0039] This utility model achieves interlocking between test door 100 and operating mechanism 1 through test door interlocking mechanism 2, and interlocking between cabinet door 200 and operating mechanism 1 through cabinet door interlocking mechanism 3: (1) After both test door 100 and cabinet door 200 are locked, that is, both test door interlocking mechanism 2 and cabinet door interlocking mechanism 3 are in a locked state, such as Figure 1 , Figure 3 , Figure 8 As shown, the operating shaft 12 drives the cam 13 and crank arm 14 to rotate to the locked state. The cam 13 rests on the pin 22, and the crank arm 14 blocks the movement path of the reversing lever 36. The pin 22 is inserted into the locking plate 101. The first blocking part 231 of the interlocking stop plate 23 and the second blocking part 321 of the interlocking plate 32 are both moved away from the operating path of the operating shaft 12. At this time, the test door 100 and the cabinet door 200 cannot be opened. The blocking of the operating shaft 12 is released, and the test door 100 and the cabinet door 200 can be opened. (2) When one of the test door interlocking mechanism 2 and the cabinet door interlocking mechanism 3 is unlocked, that is, when one of the test door 100 and the cabinet door 200 is unlocked and the other is still locked, the blocking part of the unlocked interlocking mechanism blocks the operation path of the operating shaft 12. At this time, the unlocked door can be opened, and the operating shaft 12 cannot be operated; (3) After both the test door 100 and the cabinet door 200 are unlocked, if Figure 2 , Figure 4 , Figure 9 As shown, the operating shaft 12 drives the cam 13 and the crank arm 14 to the unlocked state, the latch 22 releases the lock on the test door 100, the crank arm 14 releases the obstruction of the movement path of the reversing lever 36, and the first blocking part 231 of the interlocking baffle 23 and the second blocking part 321 of the interlocking plate 32 both block the operation path of the operating shaft 12. At this time, the test door 100 and the cabinet door 200 can be opened, but the operating shaft 12 cannot be operated.

[0040] This utility model provides interlocking mechanisms between the operating mechanism 1 and the test door 100 and the cabinet door 200. When one or both of the test door interlocking mechanism 2 and the cabinet door interlocking mechanism 3 are unlocked, the operating shaft 12 cannot be operated. Only when both the test door interlocking mechanism 2 and the cabinet door interlocking mechanism 3 are locked can the operating shaft 12 be operated, thus improving the safety and reliability of the operation.

[0041] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A door interlocking mechanism for a power distribution cabinet, characterized in that: It includes a test door interlocking mechanism (2) and a cabinet door interlocking mechanism (3). The test door interlocking mechanism (2) realizes the interlock between the operating mechanism (1) and the test door (100), and the cabinet door interlocking mechanism (3) realizes the interlock between the operating mechanism (1) and the cabinet door (200). The test door (100) is equipped with a lock plate (101) and a lock tongue (102). The operating shaft (12) of the operating mechanism (1) is provided with a cam (13) and a crank arm (14). The test door interlocking mechanism (2) is provided with a pin (22) and an interlocking plate assembly. The pin (22) and the interlocking plate assembly are movably mounted on the operating mechanism (1). One end of the pin (22) is engaged with the cam (13) to achieve interlocking, and the other end is engaged with the lock plate (101) to achieve interlocking. The interlocking plate assembly is provided with a first blocking part (231) and a locking part (252). The first blocking part (231) is engaged with the operating shaft (12) to achieve interlocking, and the locking part (252) is engaged with the lock tongue (102) to achieve interlocking. The cabinet door interlocking mechanism (3) is provided with a second blocking part (321) that cooperates with the operating shaft (12) to achieve interlocking, and an interlocking component that cooperates with the crank arm (14) to achieve interlocking.

2. The door interlocking mechanism of the distribution cabinet according to claim 1, characterized in that: The interlocking plate assembly of the test door interlocking mechanism (2) includes an interlocking baffle (23) and a transmission plate (25). The interlocking baffle (23) is connected to the transmission plate (25). The interlocking baffle (23) is movable up and down on the operating mechanism (1), and the transmission plate (25) is movable up and down on the cabinet plate (300). The first blocking part (231) is provided on the interlocking baffle (23), and the locking part (252) is provided on the transmission plate (25).

3. The door interlocking mechanism of the distribution cabinet according to claim 2, characterized in that: The interlocking baffle (23) has a slot (232) and the transmission plate (25) has an insertion part (251) inserted into the slot (232).

4. The door interlocking mechanism of the distribution cabinet according to claim 2, characterized in that: A guide (26) is connected to the cabinet panel (300). A transmission plate (25) can move up and down and can be set on the guide (26). An interlocking spring (27) is connected between the transmission plate (25) and the guide (26).

5. The door interlocking mechanism of the distribution cabinet according to claim 1, characterized in that: The lock plate (101) has a lock hole (1011). When locked, the pin (22) is inserted into the lock hole (1011). When unlocked, the pin (22) is removed from the lock hole (1011). The pin (22) is provided with a spring component (24). One end of the spring component (24) is fixed to the pin (22) and the other end is connected to the cabinet partition (400) of the power distribution cabinet.

6. The door interlocking mechanism of the distribution cabinet according to claim 1, characterized in that: The test door interlocking mechanism (2) is provided with a first seat (21), which is fixed on the mounting plate (11) of the operating mechanism (1). The pin (22) and the interlocking plate assembly are movably mounted on the first seat (21).

7. The door interlocking mechanism of the distribution cabinet according to claim 1, characterized in that: The cabinet door interlocking mechanism (3) is provided with an interlocking plate (32), which is movable up and down on the operating mechanism (1). The second blocking part (321) is provided on the interlocking plate (32). The interlocking component that cooperates with the crank arm (14) on the cabinet door interlocking mechanism (3) is a reversing lever (36). The reversing lever (36) is rotatably connected to the operating mechanism (1). One end of the reversing lever (36) is inserted into the interlocking plate (32), and the other end cooperates with the crank arm (14).

8. The door interlocking mechanism of the distribution cabinet according to claim 7, characterized in that: The reversing lever (36) is connected to the operating mechanism (1) via the lever pin (37); a limit groove (322) is provided on the interlocking plate (32), and a limit pin (38) is correspondingly provided on the reversing lever (36), and the limit pin (38) is inserted into the limit groove (322); when the interlocking plate (32) moves up and down, the reversing lever (36) can be driven to rotate around the lever pin (37) through the limit pin (38).

9. The door interlocking mechanism of the distribution cabinet according to claim 7, characterized in that: The cabinet door interlocking mechanism (3) is provided with a second seat (31), which is fixed on the mounting plate (11) of the operating mechanism (1). The interlocking plate (32) is movably mounted on the guide shaft (33) of the second seat (31). An interlocking spring (35) is provided between the interlocking plate (32) and the second seat (31). A door connecting rod (34) is connected to the interlocking plate (32).

10. The door interlocking mechanism of the distribution cabinet according to claim 1, characterized in that: The second shielding part (321) of the cabinet door interlocking mechanism (3) is located in front of the first shielding part (231) of the test door interlocking mechanism (2), and there is a distance between them; the cam (13) and the crank arm (14) are independent parts, or the cam (13) and the crank arm (14) are integrally formed on the same part.

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