An interlocking device with an emergency unlocking function and an environmentally friendly ring main unit

Abstract

The present invention belongs to the technical field of distribution network equipment, and relates to an interlocking device with an emergency unlocking function and an environmental protection ring main switch cabinet, including: an isolating interlock assembly, a circuit breaker interlock assembly, and a chamber door interlock assembly; the isolating interlock assembly includes an isolating interlock plate, and one side of the isolating interlock plate has a shielding portion; the circuit breaker interlock assembly includes a closing interlock group provided on the isolating interlock plate for locking and unlocking the closing release in the ring main switch cabinet; the chamber door interlock assembly includes a chamber door interlock member adapted to move and unlock the cable chamber door on the ring main switch cabinet; the chamber door interlock member has a resisting rod portion connected to it by a fixing bolt. Through the interlock, protection functions such as preventing the circuit breaker from being closed first when the disconnector is opened, preventing the earthing switch from being closed with live voltage after the circuit breaker is closed, and preventing the cable chamber door from being opened when the circuit breaker is closed are realized; at the same time, in the emergency situation where the interlock is stuck or other unexpected situations lead to interlock failures, the fixing bolt can also be disassembled to unlock and open the cable chamber door emergently.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution network equipment, and more particularly, relates to an interlocking device with an emergency unlocking function and an environmentally friendly ring main unit. Background Art

[0002] A ring main unit is a common AC metal-enclosed switchgear and control equipment, which uses a vacuum circuit breaker, a load switch, and a fuse as the core opening and breaking elements. It has the advantages of compact structure, simple configuration, affordable price, excellent performance, safety and reliability, etc., and is widely used in ring main units and box-type substations in scenarios such as residential communities, large buildings, public buildings, and industrial enterprises.

[0003] As SF6 ring main units gradually fail to meet the requirements and face elimination, environmentally friendly ring main units represented by dry air-insulated ring main units have rapidly developed into the mainstream. At the same time, as all walks of life in society are developing rapidly towards high-precision and high-tech fields, the quality requirements for electric energy are also getting higher and higher. As one of the commonly used distribution network equipment, the safety, reliability, and stable performance of the ring main unit are becoming increasingly important. When using the ring main unit, the operation sequence needs to be strictly observed, and in the event of an emergency where the interlock is stuck or other unexpected situations cause an interlock failure, it is necessary to urgently unlock the cable chamber door. Therefore, it is necessary to design an interlocking device and an environmentally friendly ring main unit that assist in standardizing the operation sequence and have an emergency unlocking function. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an interlocking device and an environmentally friendly ring main unit that assist in standardizing the operation sequence and have an emergency unlocking function.

[0005] To solve the above technical problems, the present invention provides an interlocking device with an emergency unlocking function, including: an isolating interlock assembly, a circuit breaker interlock assembly, and a compartment door interlock assembly; the isolating interlock assembly includes an isolating interlock plate adapted to move upward along the ring main unit and block the front of the manual operating shaft of the disconnector inside the ring main unit, a first return spring provided inside the ring main unit for the downward-moving isolating interlock plate to reset upward, a first cam connected to the output shaft of the three-position mechanism inside the ring main unit, a pull rod connected to the isolating interlock plate, the first cam being in contact and cooperation with the isolating interlock plate, the isolating interlock plate being located in the front lower part of the manual operating shaft of the disconnector, and a shielding portion protruding from one side of the isolating interlock plate and adapted to block the front of the manual operating shaft of the earthing switch inside the ring main unit; the circuit breaker interlock assembly includes a closing interlock group provided on the isolating interlock plate for locking and unlocking the closing release inside the ring main unit so that neither the manual closing button nor the closing electromagnet can perform the circuit breaker closing operation, and the closing interlock group is located above the manual closing button inside the ring main unit; the compartment door interlock assembly includes a compartment door interlock member adapted to move upward along the ring main unit and unlock the cable compartment door on the ring main unit, a second return spring provided inside the ring main unit for the downward-moving compartment door interlock member to reset upward, a rotating pressure plate connected to the manual operating shaft of the earthing switch inside the ring main unit, the lower side of the rotating pressure plate being in contact and cooperation with the upper side of the compartment door interlock member, and the compartment door interlock member being located behind the isolating interlock plate; the compartment door interlock member has a resisting rod portion connected to it by a fixing bolt, and the resisting rod portion is in contact and cooperation with the rotating pressure plate.

[0006] Preferably, the isolating interlock assembly includes a first guiding frame connected to the ring main unit, the isolating interlock plate sliding on the first guiding frame, the first guiding frame being used to guide the up and down movement of the isolating interlock plate, and the first return spring being connected between the isolating interlock plate and the first guiding frame.

[0007] Preferably, the compartment door interlock assembly further includes a second guiding frame connected to the ring main unit and a lock sleeve connected to the cable compartment door, the compartment door interlock member having a locking rod portion inserted and cooperating with the lock sleeve, the upper end of the locking rod portion sliding on the second guiding frame, the second guiding frame being used to guide the up and down movement of the compartment door interlock member, and the second return spring being connected between the locking rod portion and the second guiding frame.

[0008] Preferably, the closing interlock group includes a release locking plate connected to the isolating interlock plate, the release locking plate being adapted to move downward to physically block the operation of the closing release for driving the circuit breaker closing inside the ring main unit, and the release locking plate being located above the closing release inside the ring main unit.

[0009] Preferably, the circuit breaker interlock assembly further includes a circuit breaker interlock plate adapted to move up and down along the ring main unit and in contact and cooperation with the isolating interlock plate, and a second cam connected to the output shaft of the circuit breaker mechanism inside the ring main unit, the upper side of the second cam being in contact and cooperation with the lower side of the circuit breaker interlock plate.

[0010] Preferably, the circuit breaker interlock assembly further includes a tripping interlock group provided on the chamber door interlock member for locking and unlocking the tripping release in the ring main unit so that neither the manual tripping button nor the tripping electromagnet can perform the circuit breaker tripping operation. The tripping interlock group is located to the right of the tripping release in the ring main unit.

[0011] Preferably, the tripping interlock group includes a connecting plate connected to the left side of the locking rod portion on the chamber door interlock member, a first fixed shaft and a second fixed shaft provided in the ring main unit. A waist-shaped hole is formed on the connecting plate. A lever rotating plate located to the right of the tripping release in the ring main unit rotates on the first fixed shaft. The first end (right end) of the lever rotating plate slides in the waist-shaped hole on the connecting plate. A release locking block located between the lever rotating plate and the tripping release rotates on the second fixed shaft. The release locking block is adapted to rotate and swing to physically block the operation of the tripping release for driving the circuit breaker to trip in the ring main unit. A semi-circular groove is formed at the position of the release locking block close to the lever rotating plate. The second end (left end) of the lever rotating plate moves in the semi-circular groove.

[0012] The present invention also provides such an environmentally friendly ring main unit, which includes the above-mentioned interlock device, and also includes a ring main unit and an isolating switch manual operation shaft, a three-position mechanism output shaft, a grounding switch manual operation shaft, a closing electromagnet, a manual closing button, a closing release, a tripping release, a manual tripping button, a circuit breaker mechanism output shaft, a tripping electromagnet, and a cable chamber door provided in the ring main unit; the pull rod on the isolating interlock plate slides through the ring main unit. An isolating manual operation hole corresponding to the isolating switch manual operation shaft is formed on the ring main unit. A grounding manual operation hole corresponding to the grounding switch manual operation shaft is formed on the ring main unit. An emergency unlocking hole corresponding to the fixing bolt is formed on the ring main unit.

[0013] On the basis of overcoming the shortcomings of the prior art, the beneficial effects that the present invention can achieve are:

[0014] 1. Through the interlock, protection functions such as preventing the circuit breaker from being closed first when the isolating switch is tripped, preventing the grounding switch from being closed live after the circuit breaker is closed, and preventing the cable chamber door from being opened when the circuit breaker is closed are realized; at the same time, in the emergency situation where the interlock is stuck or other accidents cause the interlock failure, the fixing bolt can also be disassembled to unlock and open the cable chamber door emergently.

[0015] 2. After the power transmission is completed, the circuit breaker mechanism output shaft will drive the cam two to rotate and squeeze the circuit breaker interlock plate to move upward to block the lower side of the isolating interlock plate, so as to forcibly lock and keep the isolating interlock plate blocking the isolating switch manual operation shaft, and the isolating switch cannot be tripped when the circuit breaker is closed.

[0016] 3. When unlocking the cable chamber door, the upwardly moved chamber door interlock member will lock the tripping release in the ring main unit by the tripping interlock group, so as to avoid accidental situations caused by additional misoperations. Description of the Drawings

[0017] Figure 1 Schematic assembly diagram of the interlocking device of the present invention;

[0018] Figure 2 Schematic diagram of the isolating interlocking plate, cam 1, circuit breaker interlocking plate and cam 2 of the present invention;

[0019] Figure 3 Schematic diagram of the chamber door interlocking member, guide frame 2 and return spring 2 of the present invention;

[0020] Figure 4 Rear view of the release locking plate of the present invention;

[0021] Figure 5 For the present invention Figure 1 Enlarged schematic diagram at position A;

[0022] Figure 6 Schematic diagram when the opening interlocking group of the present invention is unlocked;

[0023] Figure 7 Schematic diagram when the opening interlocking group of the present invention is locked;

[0024] Figure 8 Schematic diagram of the ring main unit of the present invention;

[0025] Figure 9 Schematic diagram of the locking rod part inserted into the lock sleeve of the present invention.

[0026] The reference signs in the drawings provided by the present invention are: 1 - disconnector manual operation shaft, 2 - isolating interlocking plate, 200 - shielding part, 201 - guide frame 1, 202 - return spring 1, 203 - pull rod, 3 - three-position mechanism output shaft, 30 - cam 1, 4 - earthing switch manual operation shaft, 5 - rotating pressure plate, 6 - chamber door interlocking member, 601 - locking rod part, 602 - abutting rod part, 603 - fixing bolt, 61 - guide frame 2, 62 - return spring 2, 7 - release locking plate, 8 - closing electromagnet, 9 - circuit breaker interlocking plate, 10 - manual closing button, 11 - closing release, 12 - connecting plate, 13 - opening release, 14 - manual opening button, 15 - opening interlocking group, 151 - fixed shaft 1, 152 - lever rotating plate, 153 - fixed shaft 2, 154 - release locking block, 1540 - semi-circular groove, 16 - circuit breaker mechanism output shaft, 161 - cam 2, 17 - opening electromagnet, 18 - isolating manual operation hole, 19 - earthing manual operation hole, 20 - emergency unlocking hole, 21 - cable chamber door, 22 - lock sleeve. Detailed implementation manners

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings. It should be noted that the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] An interlocking device with an emergency unlocking function, as Figures 1 - 3 shown, includes: an isolating interlock assembly, a circuit breaker interlock assembly, and a chamber door interlock assembly; the isolating interlock assembly includes an isolating interlock plate 2 adapted to move upward along the ring main unit and block the front of the manual operating shaft 1 of the isolating switch in the ring main unit, a first return spring 202 provided in the ring main unit for the upward reset of the downwardly movable isolating interlock plate 2, a first cam 30 connected to the output shaft 3 of the three-position mechanism in the ring main unit. A pull rod 203 is connected to the isolating interlock plate 2, and the first cam 30 is in contact and cooperation with the isolating interlock plate 2. The output shaft 3 of the three-position mechanism drives the first cam 30 to rotate and squeeze the isolating interlock plate 2 into the downward position (as Figure 1), the reset spring 1-202 deforms. The isolation interlock plate 2 is located in front of and below the manual operating shaft 1 of the disconnector. The manual operating shaft 1 of the disconnector is unobstructed and operable. One side of the isolation interlock plate 2 protrudes with an occlusion portion 200 suitable for occluding the front of the manual operating shaft 4 of the earthing switch in the ring main unit. When the isolation interlock plate 2 moves upward to occlude the manual operating shaft 1 of the disconnector, the occlusion portion 200 will be driven to move upward synchronously to occlude the manual operating shaft 4 of the earthing switch; the circuit breaker interlock assembly includes a closing interlock group provided on the isolation interlock plate 2 for locking and unlocking the closing release 11 in the ring main unit so that neither the manual closing button 10 nor the closing electromagnet 8 can perform the closing operation of the circuit breaker. The closing interlock group is located above the manual closing button 10 in the ring main unit. When the isolation interlock plate 2 moves downward, the closing interlock group locks the manual closing button 10 in the ring main unit, and the circuit breaker cannot be closed; initially, the disconnector, the earthing switch, and the circuit breaker are all in the open position outside. Since the isolation interlock plate 2 moves downward to lock the manual closing button 10 in the ring main unit through the linkage closing interlock group, the circuit breaker cannot be closed first when the disconnector is opened. If power needs to be supplied, the disconnector can be closed without load through the manual operating shaft 1 of the disconnector. At this time, the output shaft 3 of the three-position mechanism will drive the cam 1-30 to rotate and release the isolation interlock plate 2 so that the isolation interlock plate 2 moves upward under the action of the reset spring 1-202 to occlude the manual operating shaft 1 of the disconnector, so that the disconnector cannot be opened when the circuit breaker is closed subsequently. The occlusion portion 200 on the isolation interlock plate 2 will move upward to occlude the manual operating shaft 4 of the earthing switch, thereby preventing the manual closing of the earthing switch after the circuit breaker is closed subsequently. At the same time, the isolation interlock plate 2 will drive the closing interlock group to move upward to unlock the manual closing button 10, and then the circuit breaker is closed through the manual closing button 10, and the power supply is completed; the chamber door interlock assembly includes a chamber door interlock member 6 suitable for moving upward along the ring main unit and unlocking the cable chamber door 21 on the ring main unit, a reset spring 2-62 provided in the ring main unit for the upward reset of the downwardly movable chamber door interlock member 6, and a rotating pressure plate 5 connected to the manual operating shaft 4 of the earthing switch in the ring main unit. The lower side of the rotating pressure plate 5 is in contact and cooperation with the upper side of the chamber door interlock member 6. The manual operating shaft 4 of the earthing switch drives the rotating pressure plate 5 to squeeze the chamber door interlock member 6 to be in the downward position (such as Figure 1 ), the reset spring 2-62 deforms, and the cable chamber door 21 on the ring main unit cannot be opened. The chamber door interlock member 6 is located behind the isolation interlock plate 2 to avoid interference;

[0030] During maintenance, the circuit breaker is tripped by the manual tripping button 14 inside the ring main unit. Then, the isolating interlock plate 2 is manually pulled downward through the pull rod 203, and the disconnecting switch is tripped manually through the disconnecting switch manual operating shaft 1 to prevent subsequent energized closing of the earthing switch. At this time, the output shaft 3 of the three-position mechanism will drive the first cam 30 to rotate reversely, squeezing the isolating interlock plate 2 to move downward, so that the linkage closing interlock group locks the manual closing button 10 inside the ring main unit. In this way, the circuit breaker cannot be closed when the earthing switch is closed subsequently. At the same time, the isolating interlock plate 2 will also drive the shielding part 200 to move downward completely away from the earthing switch manual operating shaft 4. Then, the earthing switch is closed through the earthing switch manual operating shaft 4. The earthing switch operating shaft will drive the rotating pressure plate 5 to rotate, releasing the chamber door interlock 6, so that the chamber door interlock 6 moves upward under the action of the second return spring 62 to unlock the cable chamber door 21 on the ring main unit. At this time, the cable chamber door 21 is opened for maintenance. After the maintenance is completed, the cable chamber door 21 is closed, and the earthing switch is tripped through the earthing switch manual operating shaft 4. The rotating pressure plate 5 will rotate reversely, squeezing the chamber door interlock 6 to move downward to lock the cable chamber door 21. The chamber door interlock 6 has a resisting rod part 602 connected to it through a fixing bolt 603. The resisting rod part 602 is in contact and cooperation with the rotating pressure plate 5. In the emergency situation of unlocking the cable chamber door 21 when the interlock is jammed or other accidental situations cause interlock failure, the fixing bolt 603 is loosened to remove the resisting rod part 602 from the chamber door interlock 6. In this way, the extrusion of the rotating pressure plate 5 on the resisting rod part 602 can be ignored, and the chamber door interlock 6 directly moves upward under the action of the first return spring 202 to unlock the cable chamber door 21, thus realizing the function of emergency unlocking.

[0031] As Figure 2 shown, the isolating interlock assembly includes a first guiding frame 201 connected to the ring main unit. The isolating interlock plate 2 slides on the first guiding frame 201. The first guiding frame 201 is used to guide the up and down movement of the isolating interlock plate 2. The first return spring 202 is connected between the isolating interlock plate 2 and the first guiding frame 201. When the isolating interlock plate 2 moves downward, it will squeeze the first return spring 202 to compress. When the first cam 30 releases the isolating interlock plate 2, the isolating interlock plate 2 will move upward under the reset action of the first return spring 202.

[0032] As Figure 3 and Figure 9As shown in the figure, the room door interlock assembly further includes a second guide frame 61 connected to the ring main unit and a lock sleeve 22 connected to the cable chamber door 21. The room door interlock member 6 has a lock rod portion 601 that is inserted and cooperates with the lock sleeve 22. The upper end of the lock rod portion 601 slides in the second guide frame 61. The second guide frame 61 is used to guide the up and down movement of the room door interlock member 6. A second return spring 62 is connected between the lock rod portion 601 and the second guide frame 61. When the room door interlock member 6 moves downward, it will drive the lock rod portion 601 to squeeze the second return spring 62 to compress. At the same time, the lock rod portion 601 moves downward and inserts into the lock sleeve 22 to lock the cable chamber door 21. When the rotating pressure plate 5 releases the abutting rod portion 602, the second return spring 62 will reset and drive the isolation interlock plate 2 to move upward through the lock rod portion 601. At the same time, when the lock rod portion 601 moves upward, it will disengage from the lock sleeve 22 to unlock the cable chamber door 21.

[0033] As Figure 1 and Figure 4 shown in the figure, the closing interlock group includes a trip latch plate 7 connected to the isolation interlock plate 2. The trip latch plate 7 is adapted to move downward to physically block the operation of the closing release 11 in the ring main unit for driving the circuit breaker to close. The trip latch plate 7 is located above the closing release 11 in the ring main unit. Initially, the disconnector and the circuit breaker are both in the open position. The first cam 30 on the output shaft 3 of the three-position mechanism presses the isolation interlock plate 2 to drive the trip latch plate 7 to move downward to physically block the operation of the closing release 11 for locking. The circuit breaker cannot be closed before the disconnector is closed. When the disconnector is closed, the output shaft 3 of the three-position mechanism will drive the first cam 30 to rotate and release the isolation interlock plate 2, so that the isolation interlock plate 2 drives the trip latch plate 7 to move upward under the action of the first return spring 202 to unlock the closing release 11 in the ring main unit. At this time, the circuit breaker can be closed normally.

[0034] As Figure 1 and Figure 2 shown in the figure, the circuit breaker interlock assembly further includes a circuit breaker interlock plate 9 adapted to move up and down along the ring main unit and in contact with the isolation interlock plate 2, and a second cam 161 connected to the output shaft 16 of the circuit breaker mechanism in the ring main unit. The upper side of the second cam 161 is in contact with the lower side of the circuit breaker interlock plate 9. The circuit breaker is closed by operating the manual closing button 10. After the power transmission is completed, at this time, the output shaft 16 of the circuit breaker mechanism will drive the second cam 161 to rotate and press the circuit breaker interlock plate 9, so that the circuit breaker interlock plate 9 moves upward and blocks the lower side of the isolation interlock plate 2 to forcibly lock and maintain the isolation interlock plate 2's shielding of the manual operation shaft 1 of the disconnector. Thus, the disconnector cannot be opened when the circuit breaker is closed. Only after the circuit breaker is opened by operating the manual opening button 14, the output shaft 16 of the circuit breaker mechanism will drive the second cam 161 to rotate in the reverse direction to release the circuit breaker interlock plate 9. The circuit breaker interlock plate 9 will move downward and reset under the action of gravity. At this time, the isolation interlock plate 2 can be pulled downward away from the manual operation shaft 1 of the disconnector.

[0035] like Figure 1 As shown, the circuit breaker interlock assembly also includes a trip interlock group 15 provided on the door interlock 6 for locking and unlocking the trip release 13 in the ring network cabinet so that the manual trip button 14 and the trip electromagnet 17 cannot perform the circuit breaker trip operation. The trip interlock group 15 is located to the right of the trip release 13 in the ring network cabinet. The door interlock 6 moves downward to cause the trip interlock group 15 to unlock the manual trip button 14 in the ring network cabinet. At this time, the circuit breaker can be tripped. When the door interlock 6 moves upward under the action of the reset spring 202 to unlock the cable room door 21, the upward moved door interlock 6 will cause the trip interlock group 15 to lock the trip release 13 in the ring network cabinet to avoid additional misoperation leading to accidents.

[0036] like Figure 1 、 Figure 5 、 Figure 6 and Figure 7 As shown, the opening interlocking group 15 includes a connecting plate 12 connected to the left side of the locking rod 601 on the door interlocking member 6, a fixed shaft 151 and a fixed shaft 2 153 provided in the ring network cabinet, a waist-shaped hole is opened on the connecting plate 12, and a lever rotating plate 152 located on the right side of the opening release 13 in the ring network cabinet is rotated on the fixed shaft 151. The first end (right end) of the lever rotating plate 152 slides in the waist-shaped hole on the connecting plate, and the fixed shaft 2 153 rotates on the lever rotating plate 15 2 and the tripping release 13, the tripping release locking block 154 is suitable for rotating and swinging to physically block the action of the tripping release 13 in the ring network cabinet for driving the circuit breaker to open, and a semicircular groove 1540 is provided on the tripping release locking block 154 near the lever rotating plate 152. The second end (left end) of the lever rotating plate 152 moves in the semicircular groove 1540. Initially, the tripping release locking block 154 does not lock the tripping release 13 (such as Figure 6 ), when the locking rod portion 601 moves up to unlock the cable room door 21, the locking rod portion 601 will also drive the connecting plate to move up to rotate the lever rotating plate 152 counterclockwise. During the rotation process, the lever rotating plate 152 will drive the tripper locking block 154 to rotate clockwise through the semicircular groove 1540 to physically block the action of the tripping release 13, thereby locking it, thereby avoiding misoperation when unlocking the cable room door 21.

[0037] like Figure 8As shown in the figure, an environmentally friendly ring main unit includes the above-mentioned interlocking device, and also includes a ring main unit, a disconnector manual operating shaft 1, a three-position mechanism output shaft 3, a grounding switch manual operating shaft 4, a closing electromagnet 8, a manual closing button 10, a closing release 11, a tripping release 13, a manual tripping button 14, a circuit breaker mechanism output shaft 16, a tripping electromagnet 17, and a cable chamber door 21 arranged in the ring main unit; the pull rod 203 on the isolation interlocking plate 2 slides through the ring main unit, and an isolation manual operation hole 18 corresponding to the disconnector manual operating shaft 1 is opened on the ring main unit. The isolation interlocking plate 2 is adapted to move upward to block between the disconnector manual operating shaft 1 and the isolation manual operation hole. A grounding manual operation hole 19 corresponding to the grounding switch manual operating shaft 4 is opened on the ring main unit. The shielding part 200 on the isolation interlocking plate 2 is adapted to move upward to block between the grounding switch manual operating shaft 4 and the grounding manual operation hole 19. An emergency unlocking hole 20 corresponding to the fixing bolt 603 is opened on the ring main unit. The fixing screw can be loosened through the emergency unlocking hole 20.

[0038] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all the embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present invention.

[0039] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, quantity increases or decreases, improvements and substitutions can be made. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

Claims

1. An interlocking device with an emergency unlocking function, characterized in that, The invention comprises: an isolation interlock assembly, a circuit breaker interlock assembly and a door interlock assembly; the isolation interlock assembly comprises an isolation interlock plate (2) suitable for moving and shielding the manual operating shaft (1) of the isolation switch in the ring network cabinet, a reset spring (202) for resetting the isolation interlock plate (2), and a cam (30) connected to the output shaft (3) of the three-position mechanism in the ring network cabinet, the isolation interlock plate (2) is connected to a pull rod (203), the cam (30) contacts and cooperates with the isolation interlock plate (2), and one side of the isolation interlock plate (2) has a shielding portion (200) suitable for shielding the manual operating shaft (4) of the grounding switch in the ring network cabinet; the circuit breaker interlock assembly comprises A closing interlocking group is provided on the isolation interlocking plate (2) for locking and unlocking the closing release (11) in the ring network cabinet; the door interlocking assembly comprises a door interlocking member (6) suitable for moving and unlocking the cable chamber door (21) on the ring network cabinet, a second reset spring (62) provided in the ring network cabinet for resetting the door interlocking member (6), and a rotating pressure plate (5) connected to the manual operating shaft (4) of the grounding switch in the ring network cabinet, wherein the rotating pressure plate (5) contacts and cooperates with the door interlocking member (6); the door interlocking member (6) has a push rod portion (602) connected to it by a fixing bolt (603), and the push rod portion (602) contacts and cooperates with the rotating pressure plate (5).

2. The interlocking device with an emergency unlocking function according to claim 1, characterized in that, The isolation interlock assembly includes a guide frame (201) connected to the ring network cabinet, the isolation interlock plate (2) slides on the guide frame (201), and the return spring (202) is connected between the isolation interlock plate (2) and the guide frame (201).

3. The interlocking device with an emergency unlocking function according to claim 1, characterized in that, The door interlock assembly also includes a guide frame 2 (61) connected to the ring network cabinet and a lock sleeve (22) connected to the cable room door (21), the door interlock component (6) has a lock rod portion (601) plugged into the lock sleeve (22), the lock rod portion (601) slides on the guide frame 2 (61), and the return spring 2 (62) is connected between the lock rod portion (601) and the guide frame 2 (61).

4. The interlocking device with an emergency unlocking function according to claim 1, characterized in that, The closing interlocking group comprises a tripper locking plate (7) connected to the isolation interlocking plate (2), the tripper locking plate (7) being suitable for blocking a closing tripper (11) in a ring network cabinet for driving a circuit breaker to close, and the tripper locking plate (7) being located above the closing tripper (11) in the ring network cabinet.

5. The interlocking device with an emergency unlocking function according to claim 4, characterized in that, The circuit breaker interlock assembly further comprises a circuit breaker interlock plate (9) adapted to move along the ring network cabinet and to contact and cooperate with the isolation interlock plate (2), and a second cam (161) connected to an output shaft (16) of a circuit breaker mechanism in the ring network cabinet, wherein the second cam (161) contacts and cooperates with the circuit breaker interlock plate (9).

6. The interlocking device with an emergency unlocking function according to claim 4, characterized in that, The circuit breaker interlock assembly further comprises an opening interlock group (15) provided on the chamber door interlock component (6) for locking and unlocking the opening release (13).

7. An interlocking device with an emergency unlocking function according to claim 6, characterized in that, The opening interlock group (15) includes a connecting plate (12) connected to the locking rod part (601) of the chamber door interlock (6), a first fixed shaft (151) and a second fixed shaft (153) arranged in the ring main unit. A waist-shaped hole is formed in the connecting plate (12). A lever rotating plate (152) rotates on the first fixed shaft (151). The first end of the lever rotating plate (152) slides in the waist-shaped hole of the connecting plate (12). A tripping latch (154) rotates on the second fixed shaft (153). The tripping latch (154) is adapted to rotate and swing to physically block a tripping release (13) for driving the circuit breaker to trip in the ring main unit. A semi-circular groove (1540) is formed at a position of the tripping latch (154) close to the lever rotating plate (152). The second end of the lever rotating plate (152) moves in the semi-circular groove (1540).

8. An environmentally friendly ring main unit, characterized in that, It includes the interlock device according to any one of claims 1-7, and further includes a ring main unit and an isolating switch manual operating shaft (1), a three-position mechanism output shaft (3), a grounding switch manual operating shaft (4), a closing electromagnet (8), a manual closing button (10), a closing release (11), a tripping release (13), a manual tripping button (14), a circuit breaker mechanism output shaft (16), a tripping electromagnet (17), and a cable chamber door (21) arranged in the ring main unit; a pull rod (203) on the isolating interlock plate (2) slides through the ring main unit. An isolating manual operating hole (18) corresponding to the isolating switch manual operating shaft (1) is formed in the ring main unit. A grounding manual operating hole (19) corresponding to the grounding switch manual operating shaft (4) is formed in the ring main unit. An emergency unlocking hole (20) corresponding to the fixing bolt (603) is formed in the ring main unit.

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