Interlocking device with emergency unlocking function and environment-friendly ring main unit

Abstract

The invention belongs to the technical field of power distribution network equipment, and relates to an interlocking device with an emergency unlocking function and an environment-friendly ring main unit, and the interlocking device comprises an isolation interlocking assembly, a circuit breaker interlocking assembly and a chamber door interlocking assembly. The isolation interlocking assembly comprises an isolation interlocking plate, and one side of the isolation interlocking plate is provided with a shielding part; the circuit breaker interlocking assembly comprises a closing interlocking group which is arranged on the isolation interlocking plate and is used for locking and unlocking a closing release in the ring main unit; the chamber door interlocking assembly comprises a chamber door interlocking piece suitable for movably unlocking a cable chamber door on the ring main unit; the chamber door interlocking piece is provided with a rod abutting part connected with the chamber door interlocking piece through a fixing bolt. The protection functions that the circuit breaker cannot be switched on first when the disconnecting switch is switched off, the grounding switch is switched on in an electrified mode after the circuit breaker is switched on, and a cable chamber door cannot be opened when the circuit breaker is switched on are achieved through interlocking. And meanwhile, under the emergency condition of interlocking failure caused by interlocking clamping stagnation or other unforeseen circumstances, the fixing bolt can be disassembled to unlock and open the cable chamber door emergently.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution network equipment, and in particular, relates to an interlocking device with emergency unlocking function and an environmental protection ring network cabinet. Background Art

[0002] Ring main unit is a common AC metal-enclosed switchgear and control equipment, which uses vacuum circuit breakers, load switches and fuses as core breaking components. It has the advantages of compact structure, simple configuration, affordable price, excellent performance, safety and reliability. It is widely used in ring main units and box-type substations in residential areas, large buildings, public buildings, industrial enterprises and other scenarios.

[0003] As SF6 ring main units are gradually unable to meet the demand and are facing elimination, environmentally friendly ring main units represented by dry air insulated ring main units are rapidly developing into the mainstream. At the same time, as all walks of life in society are rapidly developing towards high-tech fields, the quality requirements for electric energy are becoming higher and higher. As one of the commonly used distribution network equipment, the safety, reliability and stable performance of ring main units are becoming more and more important. When using ring main units, it is necessary to strictly follow the operating sequence, and in emergency situations where interlocking failures are caused by interlocking jams or other unexpected situations, the cable room door needs to be urgently unlocked. Therefore, it is necessary to design an interlocking device and environmentally friendly ring main unit with emergency unlocking function to assist in standardizing the operating sequence. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an interlocking device and an environmental protection ring network cabinet which assist in standardizing the operation sequence and have an emergency unlocking function.

[0005] In order to solve the above technical problems, the present invention provides an interlocking device with an emergency unlocking function, comprising: an isolation interlocking assembly, a circuit breaker interlocking assembly and a room door interlocking assembly; the isolation interlocking assembly comprises an isolation interlocking plate suitable for moving upward along the ring network cabinet and shielding the front of the manual operating shaft of the isolating switch in the ring network cabinet, a reset spring 1 arranged in the ring network cabinet for the isolation interlocking plate moving downward to reset upward, a cam 1 connected to the output shaft of the three-position mechanism in the ring network cabinet, a pull rod is connected to the isolation interlocking plate, the cam 1 contacts and cooperates with the isolation interlocking plate, the isolation interlocking plate is located in front of and below the manual operating shaft of the isolating switch, and one side of the isolation interlocking plate is protruded with a shielding portion suitable for shielding the front of the manual operating shaft of the grounding switch in the ring network cabinet; the circuit breaker interlocking assembly It includes a closing interlock group arranged on the isolation interlock plate for locking and unlocking the closing release in the ring network cabinet 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 in the ring network cabinet; the room door interlock assembly includes a room door interlock member suitable for moving upward along the ring network cabinet and unlocking the cable room door on the ring network cabinet, a reset spring arranged in the ring network cabinet for resetting the room door interlock member moving downward upward, and a rotating pressure plate connected to the manual operating shaft of the grounding switch in the ring network cabinet, the lower side of the rotating pressure plate contacts and cooperates with the upper side of the room door interlock member, and the room door interlock member is located behind the isolation interlock plate; the room door interlock member has a push rod portion connected to it by a fixing bolt, and the push rod portion contacts and cooperates with the rotating pressure plate.

[0006] Preferably, the isolation interlock assembly includes a guide frame 1 for connecting to the ring network cabinet, the isolation interlock plate slides on the guide frame 1, the guide frame 1 is used to guide the isolation interlock plate to move up and down, and a reset spring 1 is connected between the isolation interlock plate and the guide frame 1.

[0007] Preferably, the door interlock assembly also includes a guide frame 2 for connecting to the ring network cabinet and a lock sleeve connected to the cable room door. The door interlock has a locking rod portion that is plugged into and fits with the lock sleeve. The upper end of the locking rod portion slides on the guide frame 2. The guide frame 2 is used to guide the door interlock to move up and down. The reset spring 2 is connected between the locking rod portion and the guide frame 2.

[0008] Preferably, the closing interlocking group includes a release locking plate connected to the isolation interlocking plate, the release locking plate is suitable for moving downward to physically block the action of the closing release in the ring network cabinet for driving the circuit breaker to close, and the release locking plate is located above the closing release in the ring network cabinet.

[0009] Preferably, the circuit breaker interlock assembly also includes a circuit breaker interlock plate suitable for moving up and down along the ring network cabinet and contacting and cooperating with the isolation interlock plate, and a cam 2 connected to the output shaft of the circuit breaker mechanism in the ring network cabinet, and the upper side of the cam 2 contacts and cooperates with the lower side of the circuit breaker interlock plate.

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

[0011] Preferably, the opening interlocking group includes a connecting plate connected to the left side of the locking rod on the door interlocking member, a fixed shaft one and a fixed shaft two for being arranged in the ring network cabinet, a waist-shaped hole is opened on the connecting plate, a lever rotating plate located on the right side of the opening releaser in the ring network cabinet is rotated on the fixed shaft one, the first end (right end) of the lever rotating plate slides in the waist-shaped hole on the connecting plate, a releaser locking block located between the lever rotating plate and the opening releaser is rotated on the fixed shaft two, the releaser locking block is suitable for rotating and swinging to physically block the movement of the opening releaser in the ring network cabinet for driving the circuit breaker to open, a semicircular groove is opened on the releaser locking block near the lever rotating plate, and the second end (left end) of the lever rotating plate moves in the semicircular groove.

[0012] The present invention also provides such an environmentally friendly ring network cabinet, including the above-mentioned interlocking device, and also including a ring network cabinet and a manual operating shaft of an isolating switch, an output shaft of a three-position mechanism, a manual operating shaft of a grounding switch, a closing electromagnet, a manual closing button, a closing release, an opening release, a manual opening button, an output shaft of a circuit breaker mechanism, an opening electromagnet, a manual closing button of a circuit breaker, a manual opening button of a circuit breaker and a cable room door; the pull rod on the isolation interlocking plate slides through the ring network cabinet, the ring network cabinet is provided with an isolation manual operating hole corresponding to the manual operating shaft of the isolating switch, the ring network cabinet is provided with a grounding manual operating hole corresponding to the manual operating shaft of the grounding switch, and the ring network cabinet is provided with an emergency unlocking hole corresponding to the fixing bolt.

[0013] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects: 1. The interlocking function can prevent the circuit breaker from being closed first when the isolating switch is open, prevent the earthing switch from being closed with power on after the circuit breaker is closed, and prevent the cable room door from being opened when the circuit breaker is closed. At the same time, in the event of an interlocking failure caused by interlocking jam or other unexpected circumstances, the fixing bolts can be dismantled to unlock and open the cable room door in an emergency.

[0014] 2. After the power is supplied, the output shaft of the circuit breaker mechanism will drive the second cam to rotate and squeeze the circuit breaker interlock plate to move up and block the lower side of the isolation interlock plate, thereby forcing the lock to keep the isolation interlock plate blocking the manual operating shaft of the isolation switch, and the isolation switch cannot be opened when the circuit breaker is closed.

[0015] 3. When unlocking the cable room door, the upward-moving door interlock will cause the disconnect interlock group to lock the disconnect release in the ring network cabinet, thereby avoiding additional misoperation leading to unexpected situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembly of the interlocking device of the present invention.

[0017] Figure 2 It is a schematic diagram of the isolation interlocking plate, cam 1, circuit breaker interlocking plate and cam 2 of the present invention.

[0018] Figure 3 It is a schematic diagram of the door interlocking member, the second guide frame and the second return spring of the present invention.

[0019] Figure 4 It is a rear view of the locking plate of the release of the present invention.

[0020] Figure 5 For the present invention Figure 1 An enlarged schematic diagram of point A.

[0021] Figure 6 It is a schematic diagram of the interlocking group of the switch opening of the present invention when it is unlocked.

[0022] Figure 7 It is a schematic diagram of the interlocking group of the present invention when it is locked.

[0023] Figure 8 It is a schematic diagram of the ring main unit of the present invention.

[0024] Fig. 9 It is a schematic diagram of the locking rod portion of the present invention being inserted into the locking sleeve.

[0025] The markings in the accompanying drawings provided by the present invention are: 1-disconnector manual operation shaft, 2-disconnection interlock plate, 200-shielding part, 201-guide frame 1, 202-reset spring 1, 203-pull rod, 3-three-station mechanism output shaft, 30-cam 1, 4-grounding switch manual operation shaft, 5-rotating pressure plate, 6-chamber door interlock, 601-locking rod part, 602-reverse rod part, 603-fixing bolt, 61-guide frame 2, 62-reset spring 2, 7-tripper locking plate, 8-closing electromagnet, 9-circuit breaker Interlock plate, 10-manual closing button, 11-closing release, 12-connecting plate, 13-opening release, 14-manual opening button, 15-opening interlocking group, 151-fixed axis one, 152-lever rotating plate, 153-fixed axis two, 154-release device locking block, 1540-semicircular groove, 16-circuit breaker mechanism output shaft, 161-cam two, 17-opening electromagnet, 18-isolating manual operation hole, 19-grounding manual operation hole, 20-emergency unlocking hole, 21-cable room door, 22-lock sleeve. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] An interlocking device with emergency unlocking function, such as Figure 1-Figure 3 As shown, it includes: an isolation interlock assembly, a circuit breaker interlock assembly and a door interlock assembly; the isolation interlock assembly includes an isolation interlock plate 2 suitable for moving upward along the ring network cabinet and shielding the front of the manual operating shaft 1 of the isolation switch in the ring network cabinet, a reset spring 202 provided in the ring network cabinet for the isolation interlock plate 2 moving downward to reset upward, a cam 30 connected to the output shaft 3 of the three-position mechanism in the ring network cabinet, a pull rod 203 is connected to the isolation interlock plate 2, the cam 30 contacts and cooperates with the isolation interlock plate 2, and the output shaft 3 of the three-position mechanism drives the cam 30 to rotate and squeeze the isolation interlock plate 2 to be in a downward position (such as Figure 1), the reset spring 202 is deformed, the isolation interlock plate 2 is located in the front and lower part of the manual operating shaft 1 of the isolation switch, the manual operating shaft 1 of the isolation switch can be operated without blocking, and a shielding part 200 is protruded on one side of the isolation interlock plate 2 for shielding the front of the manual operating shaft 4 of the grounding switch in the ring network cabinet. When the isolation interlock plate 2 moves up to shield the manual operating shaft 1 of the isolation switch, it will drive the shielding part 200 to move up synchronously to shield the manual operating shaft 4 of the grounding switch; the circuit breaker interlock assembly includes a circuit breaker interlocking assembly provided on the isolation interlock plate 2 for locking and unlocking the closing release 11 in the ring network cabinet to enable manual closing. The closing interlock group in which both the button 10 and the closing electromagnet 8 cannot perform the circuit breaker closing operation is located above the manual closing button 10 in the ring network cabinet. The isolation interlock plate 2 moves downward to make the closing interlock group lock the manual closing button 10 in the ring network cabinet, and the circuit breaker cannot be closed; initially, the disconnector, the earthing switch and the circuit breaker are all in the open external position. Since the isolation interlock plate 2 moves downward, the linkage closing interlock group locks the manual closing button 10 in the ring network cabinet, so that the circuit breaker cannot be closed first when the disconnector is open. If power needs to be supplied, it can be supplied through the disconnector. The manual operation shaft 1 closes the isolating switch under no-load conditions. At this time, the output shaft 3 of the three-position mechanism will drive the cam 30 to rotate and loosen the isolating interlock plate 2, so that the isolating interlock plate 2 moves up under the action of the reset spring 202 to block the manual operation shaft 1 of the isolating switch, so that the isolating switch cannot be opened when the circuit breaker is closed subsequently. The blocking part 200 on the isolating interlock plate 2 will move up to block the manual operation shaft 4 of the grounding switch, thereby preventing the grounding switch from being manually closed after the circuit breaker is closed subsequently. At the same time, the isolating interlock plate 2 will drive the closing interlock group to move up to unlock the manual closing. Button 10, then the circuit breaker is closed by manually closing the switch button 10, and the power supply is completed; the door interlock assembly includes a door interlock 6 suitable for moving upward along the ring network cabinet and unlocking the cable room door 21 on the ring network cabinet, a reset spring 62 for the door interlock 6 moving downward in the ring network cabinet, and a rotating pressure plate 5 connected to the manual operating shaft 4 of the grounding switch in the ring network cabinet. The lower side of the rotating pressure plate 5 contacts and cooperates with the upper side of the door interlock 6, and the manual operating shaft 4 of the grounding switch drives the rotating pressure plate 5 to squeeze the door interlock 6 in the downward position (such as Figure 1 ), the reset spring 2 62 is deformed, the cable room door 21 on the ring main unit cannot be opened, and the door interlock 6 is located behind the isolation interlock plate 2 to avoid interference; During maintenance, the circuit breaker is opened by the manual opening button 14 in the ring network cabinet, and then the isolation interlock plate 2 is manually pulled down through the pull rod 203 and the isolation switch is opened through the manual operating shaft 1 of the isolation switch to avoid subsequent live closing of the earthing switch. At this time, the output shaft 3 of the three-station mechanism will drive the cam 30 to rotate in the opposite direction to squeeze the isolation interlock plate 2 downward so that the linkage closing interlock group locks the manual closing button 10 in the ring network cabinet, so that the circuit breaker cannot be closed when the earthing switch is closed subsequently. At the same time, the isolation interlock plate 2 will also drive the shielding part 200 to move downward and completely away from the manual operating shaft 4 of the earthing switch, and then the earthing switch is closed through the manual operating shaft 4 of the earthing switch. The earthing switch operating shaft will drive the rotating pressure plate 5 to rotate and release the room door interlock 6 so that the room door interlock 6 moves up under the action of the reset spring 2 62 to unlock the ring network. The cable room door 21 on the cabinet is opened for maintenance at this time. After the maintenance is completed, the cable room door 21 is closed, and the grounding switch is opened by the manual operating shaft 4 of the grounding switch. The rotating pressure plate 5 will rotate in the opposite direction to squeeze the door interlock 6 to move down and lock the cable room door 21; the door interlock 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. In an emergency situation where the interlock is stuck or other unexpected situations lead to an interlock failure, when it is necessary to unlock the cable room door 21, loosen the fixing bolt 603 to remove the push rod portion 602 from the door interlock 6, so that the squeezing of the push rod portion 602 by the rotating pressure plate 5 can be ignored, and the door interlock 6 can be directly moved up under the action of the reset spring 202 to unlock the cable room door 21, thereby realizing the function of emergency unlocking.

[0029] like Figure 2 As shown, the isolation interlock assembly includes a guide frame 201 for connecting to the ring network cabinet, the isolation interlock plate 2 slides on the guide frame 201, the guide frame 201 is used to guide the isolation interlock plate 2 to move up and down, and the reset spring 202 is connected between the isolation interlock plate 2 and the guide frame 201. The isolation interlock plate 2 moves downward to squeeze the reset spring 202 for compression. When the cam 30 releases the isolation interlock plate 2, the isolation interlock plate 2 will move up under the action of the reset spring 202.

[0030] like Figure 3 and Fig. 9As shown, the door interlock assembly also includes a guide frame 61 for connecting to the ring network cabinet and a lock sleeve 22 connected to the cable room door 21. The door interlock 6 has a lock rod portion 601 that is plugged into the lock sleeve 22. The upper end of the lock rod portion 601 slides on the guide frame 61. The guide frame 61 is used to guide the door interlock 6 to move up and down. The reset spring 62 is connected between the lock rod portion 601 and the guide frame 61. The downward movement of the door interlock 6 will drive the lock rod portion 601 to squeeze the reset spring 62 and compress it. At the same time, the lock rod portion 601 moves downward and is inserted into the lock sleeve 22 to lock the cable room door 21. When the rotating pressure plate 5 releases the abutment portion 602, the reset spring 62 is reset and drives the isolation interlock plate 2 to move upward through the lock rod portion 601. At the same time, the upward movement of the lock rod portion 601 will disengage from the lock sleeve 22 to unlock the cable room door 21.

[0031] like Figure 1 and Figure 4 As shown, the closing interlocking group includes a release locking plate 7 connected to the isolation interlocking plate 2, and the release locking plate 7 is suitable for moving downward to physically block the action of the closing release 11 in the ring network cabinet for driving the circuit breaker to close. The release locking plate 7 is located above the closing release 11 in the ring network cabinet. Initially, the isolation switch and the circuit breaker are both in the open position. The cam 30 on the output shaft 3 of the three-position mechanism squeezes the isolation interlocking plate 2 to drive the release locking plate 7 to move downward to physically block the action of the closing release 11, thereby locking. The circuit breaker cannot be closed before the isolation switch is closed. When the isolation switch is closed, the output shaft 3 of the three-position mechanism will drive the cam 30 to rotate and loosen the isolation interlocking plate 2 so that the isolation interlocking plate 2 drives the release locking plate 7 to move upward under the action of the reset spring 202 to unlock the closing release 11 in the ring network cabinet. At this time, the circuit breaker can be closed normally.

[0032] like Figure 1 and Figure 2 As shown, the circuit breaker interlock assembly also includes a circuit breaker interlock plate 9 suitable for moving up and down along the ring network cabinet and contacting and cooperating with the isolation interlock plate 2, and a cam 161 connected to the output shaft 16 of the circuit breaker mechanism in the ring network cabinet. The upper side of the cam 161 contacts and cooperates 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 supply is completed, the output shaft 16 of the circuit breaker mechanism will drive the cam 161 to rotate and squeeze the circuit breaker interlock plate 9, so that the circuit breaker interlock plate 9 moves upward. It resides on the lower side of the isolation interlock plate 2, thereby forcing the isolation interlock plate 2 to block the manual operating shaft 1 of the isolation switch, so that the isolation switch cannot be opened when the circuit breaker is closed. Only after the circuit breaker is opened by the manual opening button 14, the circuit breaker mechanism output shaft 16 will drive the cam 2 161 to rotate in the opposite 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 operating shaft 1 of the isolation switch.

[0033] like Figure 1 As shown, the circuit breaker interlock assembly also includes a disconnect interlock group 15 arranged on the door interlock 6 for locking and unlocking the disconnect release 13 in the ring network cabinet so that the manual disconnect button 14 and the disconnect electromagnet 17 cannot perform the circuit breaker disconnect operation. The disconnect interlock group 15 is located on the right side of the disconnect release 13 in the ring network cabinet. The door interlock 6 moves downward to enable the disconnect interlock group 15 to unlock the manual disconnect button 14 in the ring network cabinet. At this time, the circuit breaker can be disconnected. When the door interlock 6 moves upward to unlock the cable room door 21 under the action of the reset spring 202, the upward door interlock 6 will cause the disconnect interlock group 15 to lock the disconnect release 13 in the ring network cabinet to avoid additional misoperation leading to unexpected situations.

[0034] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the switch-off 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 for being arranged 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 switch-off releaser 13 in the ring network cabinet is rotated on the fixed shaft 151, and 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 is rotated on the lever rotating plate 1 52 and the opening release 13, the release locking block 154 is suitable for rotating and swinging to physically block the action of the opening release 13 in the ring network cabinet for driving the circuit breaker to open, and the release locking block 154 is provided with a semicircular groove 1540 near the lever rotating plate 152, and the second end (left end) of the lever rotating plate 152 moves in the semicircular groove 1540. Initially, the release locking block 154 does not lock the opening 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 drive the lever rotating plate 152 to rotate counterclockwise. During the rotation process, the lever rotating plate 152 will drive the release locking block 154 to rotate clockwise through the semicircular groove 1540 to physically block the action of the opening release 13, thereby locking it, thereby avoiding misoperation when unlocking the cable room door 21.

[0035] like Figure 8As shown, an environmental protection ring network cabinet includes the above-mentioned interlocking device, and also includes a ring network cabinet and a manual operating shaft 1 of an isolating switch, an output shaft 3 of a three-position mechanism, a manual operating shaft 4 of a grounding switch, a closing electromagnet 8, a manual closing button 10, a closing release 11, an opening release 13, a manual opening button 14, a circuit breaker mechanism output shaft 16, an opening electromagnet 17, a circuit breaker manual closing button 10, a circuit breaker manual opening button 14 and a cable room door 21; the pull rod 203 on the isolation interlocking plate 2 slides through the ring network cabinet, An isolating manual operating hole 18 corresponding to the isolating switch manual operating shaft 1 is opened on the ring main unit, and the isolating interlock plate 2 is suitable for moving up to block between the isolating switch manual operating shaft 1 and the isolating switch manual operating hole. A grounding manual operating hole 19 corresponding to the grounding switch manual operating shaft 4 is opened on the ring main unit, and the shielding portion 200 on the isolating interlock plate 2 is suitable for moving up to block between the grounding switch manual operating shaft 4 and the grounding manual operating hole 19. An emergency unlocking hole 20 corresponding to the fixing bolt 603 is opened on the ring main unit, and the fixing screw can be loosened through the emergency unlocking hole 20.

[0036] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention.

[0037] It should be pointed out that, for ordinary technicians in this field, several modifications, increases and decreases in quantity, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

Claims

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

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

3. An interlocking device with emergency unlocking function according to claim 1, characterized in that: The door interlock assembly also includes a guide frame 2 (61) for connecting 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 and mated with 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. An interlocking device with emergency unlocking function according to claim 1, characterized in that: The closing interlocking group comprises a release locking plate (7) connected to the isolation interlocking plate (2), the release locking plate (7) being suitable for blocking a closing release (11) in the ring network cabinet for driving the circuit breaker to close, and the release locking plate (7) being located above the closing release (11) in the ring network cabinet.

5. An interlocking device with emergency unlocking function according to claim 4, characterized in that: The circuit breaker interlock assembly also includes a circuit breaker interlock plate (9) adapted to move along the ring main unit 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 main unit, wherein the second cam (161) contacts and cooperates with the circuit breaker interlock plate (9).

6. An interlocking device with emergency unlocking function according to claim 4, characterized in that: The circuit breaker interlock assembly also includes a disconnect interlock group (15) provided on the chamber door interlock component (6) for locking and unlocking the disconnect release (13).

7. An interlocking device with emergency unlocking function according to claim 6, characterized in that: The opening interlocking group (15) comprises a connecting plate (12) connected to the locking rod (601) on the door interlocking member (6), a fixed shaft one (151) and a fixed shaft two (153) for being arranged in the ring network cabinet, the connecting plate (12) is provided with a waist-shaped hole, a lever rotating plate (152) is rotatably provided on the fixed shaft one (151), a first end of the lever rotating plate (152) slides in the waist-shaped hole on the connecting plate (12), a release locking block (154) is rotatably provided on the fixed shaft two (153), the release locking block (154) is suitable for rotating and swinging to physically block the opening release (13) in the ring network cabinet for driving the circuit breaker to open, a semicircular groove (1540) is provided on the release locking block (154) at a position close to the lever rotating plate (152), and a second end of the lever rotating plate (152) moves in the semicircular groove (1540).

8. An environmentally friendly ring main unit, characterized in that: The invention comprises an interlocking device as claimed in any one of claims 1 to 7, and further comprises a ring network cabinet and a manual operating shaft (1) of an isolating switch, an output shaft (3) of a three-position mechanism, a manual operating shaft (4) of a grounding switch, a closing electromagnet (8), a manual closing button (10), a closing release (11), an opening release (13), a manual opening button (14), an output shaft (16) of a circuit breaker mechanism, an opening electromagnet (17), a manual closing button (10) of a circuit breaker, a manual opening button (14) of a circuit breaker and a cable room door (21); the pull rod (203) on the isolating interlocking plate (2) slides through the ring network cabinet, the ring network cabinet is provided with an isolating manual operating hole (18) corresponding to the manual operating shaft (1) of the isolating switch, the ring network cabinet is provided with a grounding manual operating hole (19) corresponding to the manual operating shaft (4) of the grounding switch, and the ring network cabinet is provided with an emergency unlocking hole (20) corresponding to the fixing bolt (603).

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