Five-prevention interlocking device of ring net cabinet

Abstract

The application discloses a five-prevention interlocking device of a ring main unit, which comprises a circuit breaker and an isolation mechanism installed in a ring main unit box and an interlocking plate set cooperatively connected between the circuit breaker and the isolation mechanism, a switching knob is arranged on a circuit breaker panel, an isolation operation shaft and a grounding operation shaft are arranged on an isolation mechanism panel; the interlocking plate set comprises an isolation interlocking plate, a switching interlocking plate and a circuit interlocking plate, the isolation interlocking plate is movably installed on the isolation mechanism panel and is in transmission connection with an output shaft of the isolation mechanism, the switching interlocking plate is connected to the isolation interlocking plate and cooperates with the switching knob; the circuit interlocking plate is movably installed on a circuit breaker mechanism panel and is in transmission connection with an output shaft of the circuit breaker. The application has the beneficial effects that: the mechanical interlocking cooperation among the three plate bodies can realize the five-prevention interlocking function of the ring main unit, the electrical interlocking is not needed, the reliability and stability of the interlocking are improved, and the risk of interlocking failure caused by electrical faults is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a five-prevention interlocking device for a ring main unit. Background Technology

[0002] A ring main unit is an electrical device consisting of a set of high-voltage switchgear installed in a steel plate metal cabinet or assembled into a modular ring main power supply unit. Its core components use load switches and fuses. It has advantages such as simple structure, small size, low price, improved power supply parameters and performance, and improved power supply safety. To enhance safety, the ring main unit is equipped with five-proof interlocking.

[0003] For example, the following conditions must be met between the circuit breaker, grounding switch, and disconnector: the disconnector can only be opened or closed when the circuit breaker is in the open position; the grounding switch can only be closed when both the circuit breaker and disconnector are in the open position; and the circuit breaker or disconnector can only be closed when the grounding switch is in the open position. Existing technologies often use electrical interlocking for control, but this method suffers from low reliability and susceptibility to external environmental influences. To address these issues, this application proposes a novel five-prevention interlocking device for ring main units, aiming to improve the reliability and stability of the interlocking. Utility Model Content

[0004] One of the objectives of this application is to provide a novel five-proof interlocking device for ring main units.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a five-proof interlocking device for a ring main unit, comprising a circuit breaker and an isolation mechanism installed inside the ring main unit box, and an interlocking plate assembly connected to the circuit breaker and the isolation mechanism. The circuit breaker panel is provided with an open / close knob, and the isolation mechanism panel is provided with an isolation operating shaft and a grounding operating shaft. The interlocking plate assembly includes an isolation interlocking plate, an open / close locking plate, and a circuit breaker interlocking plate. The isolation interlocking plate is movably mounted on the isolation mechanism panel and is connected to the output shaft of the isolation mechanism. The open / close locking plate is connected to the isolation interlocking plate and cooperates with the open / close knob. The circuit breaker interlocking plate is movably mounted on the circuit breaker mechanism panel and... The circuit breaker is connected to the output shaft of the circuit breaker. During power supply, the isolation mechanism closes and drives the isolation interlock plate to move and lock the grounding operating shaft, and drives the opening / closing lock plate to unlock the opening / closing knob. Then, the circuit breaker closes and drives the circuit breaker interlock plate to move and lock the isolation operating shaft. During power outage, the circuit breaker opens so that the circuit breaker interlock plate releases the lock on the isolation operating shaft. Then, the isolation mechanism opens and drives the isolation interlock plate to move and release the lock on the grounding operating shaft, and drives the opening / closing lock plate to move and lock the opening / closing knob. During grounding, the isolation mechanism grounds and drives the isolation interlock plate to move and lock the isolation operating shaft.

[0006] Preferably, the circuit breaker and the isolating mechanism are arranged vertically, the isolating interlock plate is vertically slidably installed on the isolating mechanism panel, the opening and closing interlock plate is vertically slidably installed inside the circuit breaker and its bottom end is connected to the top end of the isolating interlock plate, and the circuit breaking interlock plate is vertically slidably installed on the circuit breaker panel.

[0007] Preferably, the output shaft of the isolation mechanism is equipped with an interlocking cam, and the isolation interlocking plate is provided with a groove. The interlocking cam cooperates with the groove to realize the up and down movement of the isolation interlocking plate.

[0008] Preferably, the circuit breaker interlock plate is adapted to be connected to the circuit breaker via an elastic element, and the output shaft of the circuit breaker is equipped with an interlocking crank arm; when the circuit breaker is closed, the circuit breaker interlock plate is adapted to move downward under the squeezing action of the interlocking crank arm; when the circuit breaker is closed, the interlocking crank arm is adapted to move away from the circuit breaker interlock plate, and then the circuit breaker interlock plate moves upward and reset under the action of elastic force.

[0009] Preferably, the isolation mechanism is provided with an interlocking component that cooperates with the lower door of the ring main unit; when the lower door is removed, the interlocking component is adapted to lock the isolation operating shaft and the grounding operating shaft.

[0010] Preferably, the interlocking device includes a lower door interlocking plate and an interlocking rod. The lower door interlocking plate is elastically and vertically slidably installed within the isolation mechanism, and the interlocking rod is vertically connected to the bottom end of the lower door interlocking plate. When the lower door is hooked and installed in the ring main unit box via the interlocking rod and is in the locked position, the lower door interlocking plate is adapted to move downward under the action of the lower door and release the blockage of the isolation operating shaft and the grounding operating shaft. When the lower door is removed, the lower door interlocking plate is adapted to move upward under the action of elastic force and block the isolation operating shaft and the grounding operating shaft.

[0011] Preferably, a counter is installed on the circuit breaker, the counter is connected to the circuit breaker interlock plate, and the counter is adapted to record the number of times the circuit breaker is closed and opened by moving the circuit breaker interlock plate.

[0012] Preferably, the top of the locking plate has a plug-in portion, and the outer circumference of the locking knob has a slot. The plug-in portion cooperates with the slot to lock the locking knob.

[0013] Preferably, both the circuit breaker and the isolation mechanism are equipped with multiple guide nuts via multiple guide bolts. The isolation interlock plate, the opening and closing interlock plate, and the circuit breaker interlock plate are all provided with multiple oblong grooves on their exteriors. The oblong grooves cooperate with the corresponding guide bolts and guide nuts to achieve sliding installation of the plates.

[0014] Preferably, the isolation mechanism is equipped with an isolation program lock and a grounding electromagnetic lock, the isolation program lock is configured with the isolation operating shaft, and the grounding electromagnetic lock cooperates with the grounding operating shaft.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] This utility model utilizes the mechanical interlocking mechanism between the three plates—isolation interlocking plate, split interlocking plate, and circuit breaker interlocking plate—to enable the interlocking device to automatically complete interlocking and unlocking actions during power supply, power outage, and grounding operations. This eliminates the need for electrical interlocking, improving the reliability and stability of the interlocking system and reducing the risk of interlocking failure due to electrical faults. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the circuit breaker of this utility model.

[0019] Figure 3 This is a schematic diagram of the isolation mechanism of this utility model.

[0020] Figure 4This is a side view of the structure of this utility model.

[0021] Figure 5 For the present utility model Figure 4 Schematic diagram of the cross-sectional structure at point AA.

[0022] Figure 6 This is a schematic diagram of the circuit breaker and isolation mechanism of this utility model in the state where both are open and the lower door is closed.

[0023] Figure 7 This is a schematic diagram showing the circuit breaker and isolation mechanism of this utility model in the closed state.

[0024] Figure 8 This is a schematic diagram showing the grounded isolation mechanism of this utility model with the lower door open.

[0025] In the diagram: 1. Circuit breaker; 101. Circuit breaker output shaft; 2. Isolation mechanism; 201. Isolation output shaft; 3. Interlocking assembly; 301. Interlocking rod; 302. Interlocking nut; 303. Lower door interlocking plate; 304. Return spring; 4. Opening / closing knob; 5. Interlocking crank arm; 6. Circuit breaker interlocking plate; 7. Guide nut; 8. Waist-shaped groove; 9. Return spring; 10. Counting spring; 11. Counter; 12. Grounding operating shaft; 13. Isolation interlocking plate; 14. Interlocking cam; 15. Groove; 16. Isolation indicator; 17. Grounding electromagnetic lock; 18. Isolation operating shaft; 19. Opening / closing lock plate; 20. Isolation program lock. Detailed Implementation

[0026] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0028] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] One preferred embodiment of this application, such as Figures 1 to 8 As shown, a five-proof interlocking device for a ring main unit includes a circuit breaker 1 and an isolation mechanism 2. Both the circuit breaker 1 and the isolation mechanism 2 are installed inside the ring main unit box and are connected by an interlocking plate assembly. It should be noted that the circuit breaker 1 and the isolation mechanism 2 are common knowledge known to those skilled in the art; therefore, their detailed structure and working principle will not be elaborated further. Their general working principle is as follows: A switch knob 4 is provided on the panel of the circuit breaker 1, which is used to open and close the circuit breaker 1; an isolation operating shaft 18 (also called an isolation operating hole) and a grounding operating shaft 12 (also called a grounding operating hole) are provided on the panel of the isolation mechanism 2. The isolation operating shaft 18 is used to open and close the isolation mechanism 2, and the grounding operating shaft 12 is used to ground the mechanism.

[0030] Specifically, the interlocking plate assembly has three plates: an isolation interlocking plate 13, a switching interlocking plate 19, and a circuit breaker interlocking plate 6. The isolation interlocking plate 13 is movably mounted on the panel of the isolation mechanism 2 and is connected to the output shaft of the isolation mechanism 2 (i.e., the isolation output shaft 201). The switching interlocking plate 19 is connected to the isolation interlocking plate 13 and cooperates with the switching knob 4. The circuit breaker interlocking plate 6 is movably mounted on the mechanism panel of the circuit breaker 1 and is connected to the output shaft of the circuit breaker 1 (i.e., the circuit breaker output shaft 101).

[0031] Understandably, during the power supply operation: ① First, the isolating mechanism 2 is closed by operating the isolating operating shaft 18. Through the transmission action of the isolating output shaft 201, the isolating interlock plate 13 moves and locks the grounding operating shaft 12. Simultaneously, the opening / closing lock plate 19 unlocks the opening / closing knob 4 under the action of the isolating interlock plate 13. ② Then, the circuit breaker 1 is closed by operating the opening / closing knob 4. Through the transmission action of the circuit breaker output shaft 101, the circuit breaker interlock plate 6 moves and locks the isolating operating shaft 18. After this operation, both the circuit breaker 1 and the isolating mechanism 2 are in the closed state.

[0032] During a power outage operation: ① First, the circuit breaker 1 is opened using the open / close knob 4. The circuit breaker output shaft 101 then releases the circuit breaker interlock plate 6 from blocking the isolating operating shaft 18. ② Next, the isolating mechanism 2 is closed using the isolating operating shaft 18. Similarly, under the action of the isolating output shaft 201, the isolating interlock plate 13 moves and releases its block on the grounding operating shaft 12. Simultaneously, the open / close locking plate 19 moves under the influence of the isolating interlock plate 13 and locks the open / close knob 4 again. After this operation, both the circuit breaker 1 and the isolating mechanism 2 are in the open state.

[0033] During grounding operation, the isolation mechanism 2 is grounded via the grounding operation shaft 12. Driven by the isolation output shaft 201, the isolation interlock plate 13 moves and blocks the isolation operation shaft 18. After this operation, the isolation mechanism 2 is grounded, and both the isolation mechanism 2 and the isolation operation shaft 18 are in an inoperable, open state.

[0034] As a further description of the above embodiments: as Figure 1 As shown, circuit breaker 1 is located at the top, isolating mechanism 2 is located at the bottom, and isolating interlock plate 13 is vertically slidably mounted on the panel of isolating mechanism 2. Circuit breaker interlock plate 6 is vertically slidably mounted on the panel of circuit breaker 1, and opening / closing interlock plate 19 is vertically slidably mounted inside circuit breaker 1 and connected to the top of isolating interlock plate 13. In other words, during operation, the three plates of the interlock plate assembly unlock or lock relative to each other by sliding vertically up and down.

[0035] This application does not specifically limit the transmission method between the circuit breaker interlock plate 6 and the circuit breaker output shaft 101, nor the transmission method between the isolation interlock plate 13 and the isolation output shaft 201. Specific embodiments are provided below for reference:

[0036] like Figure 3 As shown, an interlocking cam 14 and an isolation indicator 16 are mounted on the isolation output shaft 201, and a groove 15 is provided on the isolation interlock plate 13. It can be understood that when the isolation mechanism 2 is operated, the isolation output shaft 201 will drive the interlocking cam 14 to rotate, and the up and down movement of the isolation interlock plate 13 can be achieved through the squeezing action between the interlocking cam 14 and the groove 15.

[0037] like Figure 2 As shown, the circuit breaker interlock plate 6 can be connected to the circuit breaker 1 via an elastic element (such as a reset spring 9), and the circuit breaker output shaft 101 is equipped with an interlocking crank arm 5. It can be understood that when the circuit breaker 1 is closed, the circuit breaker output shaft 101 will drive the interlocking crank arm 5 to rotate and press the circuit breaker interlock plate 6 downwards; conversely, when the circuit breaker 1 is open, the interlocking crank arm 5 will rotate and move away from the circuit breaker interlock plate 6, and the circuit breaker interlock plate 6 will then move upwards and reset under the elastic force of the reset spring 9.

[0038] It should be understood that ring main units require regular maintenance, which involves opening the lower door of the ring main unit box. Before opening the door, a grounding operation must be performed (refer to the grounding operation described above). The lower door is generally interlocked with isolation mechanism 2, meaning it can only be opened after grounding (this is common knowledge known to those skilled in the art). While this ensures safety during maintenance, a potential hazard remains: if the grounding operating shaft 12 is in an unblocked state after opening the door, and maintenance personnel mistakenly release the grounding of isolation mechanism 2 via the grounding operating shaft 12, then isolation mechanism 2 may become energized, posing a significant safety risk. While the possibility of human error is small, it cannot be ruled out.

[0039] Therefore, in order to further improve the security of the interlocking, in one embodiment of this application, such as Figure 3 As shown, the isolation mechanism 2 is equipped with an interlocking component 3 that cooperates with the rear door of the ring main unit; after the door is removed, the interlocking component 3 can lock the isolation operating shaft 18 and the grounding operating shaft 12.

[0040] Specifically, the interlocking assembly 3 includes a lower door interlocking plate 303, an interlocking rod 301, an interlocking nut 302, and a return spring 304. The lower door interlocking plate 303 is vertically slidably installed in the isolation mechanism 2 via the return spring 304. The interlocking rod 301 is vertically connected to the bottom end of the lower door interlocking plate 303, while the interlocking nut 302 is installed at the bottom end of the interlocking rod 301 to facilitate the insertion and hooking of the lower door.

[0041] Understandably, when the lower door is installed in the ring main unit box and locked by the interlocking rod 301 and interlocking nut 302, the lower door interlocking plate 303 moves down under the action of the lower door and releases the blockage of the isolation operating shaft 18 and the grounding operating shaft 12; when the lower door is removed, the lower door interlocking plate 303 moves up under the action of the spring and blocks the isolation operating shaft 18 and the grounding operating shaft 12.

[0042] Therefore, after the lower door is removed, the previously operable grounding operating shaft 12 will also be blocked, thus placing the isolation mechanism 2 in a grounded and inoperable state. This effectively prevents safety hazards caused by maintenance personnel accidentally operating the mechanism after opening the door. In other words, by adding another interlock to the five-proof interlocking system, multiple layers of protection are provided, greatly improving safety.

[0043] In this embodiment, as Figure 2As shown, a counter 11 is installed on the circuit breaker 1. The counter 11 is connected to the circuit breaker interlock plate 6 via a counting spring 10. It should be understood that the circuit breaker 1 moves the circuit breaker interlock plate 6 up and down each time it is closed or opened. Therefore, the counter 11 can record the number of times the circuit breaker 1 is closed or opened by the movement of the circuit breaker interlock plate 6, thus facilitating the monitoring and maintenance of the circuit breaker 1's operating status by personnel. Of course, the structure and principle of the counter 11 are common knowledge to those skilled in the art.

[0044] In this embodiment, the locking plate 19 is described as follows: the top of the locking plate 19 has a plug-in part, and the outer circumference of the locking plate 4 has a slot; when the plug-in part and the slot are plugged in, the locking plate 4 can be locked; conversely, when the plug-in part moves and separates from the slot, the locking plate 4 can be unlocked.

[0045] Further optimization involves the vertical sliding installation of the three plates of the interlocking plate body: For example... Figure 2 , Figure 3 and Figure 5 As shown, multiple guide bolts are installed on both the circuit breaker 1 and the isolation mechanism 2. These guide bolts are exposed outside the equipment. Multiple oblong grooves 8 are provided on the exterior of the three plates (i.e., the isolation interlock plate 13, the opening and closing interlock plate 19, and the circuit breaker interlock plate 6). The oblong grooves 8 are engaged with the corresponding guide bolts, and then the guide nuts 7 are tightened onto the guide bolts. The engagement between the guide bolts and the oblong grooves 8 enables the sliding installation of the plates. The design of the oblong grooves 8 allows the plates to have a certain range of movement in the vertical direction, and the engagement between the guide bolts and the guide nuts 7 also facilitates the disassembly and maintenance of the interlock plate assembly in the future.

[0046] In this embodiment, in order to further improve the interlocking security of the equipment, an isolation program lock 20 and a grounding electromagnetic lock 17 can be installed on the isolation mechanism 2 respectively. The isolation program lock 20 is configured with the isolation operation shaft 18, and the grounding electromagnetic lock 17 is coordinated with the grounding operation shaft 12.

[0047] It is understood that this application allows for the selective installation of the isolation procedure lock 20 and the grounding electromagnetic lock 17, interlocked according to power grid engineering requirements. When the isolation procedure lock 20 is opened, the isolation operating shaft 18 will be blocked, preventing isolation opening and closing operations; when the grounding electromagnetic lock 17 is opened, the grounding operating shaft 12 will be blocked, preventing grounding opening and closing operations, thus achieving multiple interlocks and further ensuring operational safety. Of course, the two lock bodies can be selectively installed according to actual needs to meet the safety requirements of different scenarios; and the structure and working principle of the two lock bodies are common knowledge known to those skilled in the art.

[0048] The working principle of this utility model is as follows:

[0049] This application relates to a novel five-proof interlocking system for the circuit breaker 1 mechanism and the three-position isolation mechanism 2 in a lower-isolation ring main unit. The circuit breaker 1 and the isolation mechanism 2 are installed with upper and lower doors attached to the rear of the ring main unit mechanism box. Figures 1 to 5 As shown, this is the original state after the mechanism is assembled, i.e., circuit breaker 1 is open, isolating mechanism 2 is open, and the lower door is open. Inserting the lower door into the interlocking nut 302 causes the lower door interlocking rod 301 and the lower door interlocking plate 303 to descend to the locked position; as shown... Figure 6 As shown, at this time, circuit breaker 1 is open, isolating mechanism 2 is open, the lower door is closed, and isolating operating shaft 18 is in an operable state.

[0050] I. Power-on Operation: Insert the operating handle to perform the isolation closing operation. The output shaft of the isolation mechanism 2 rotates, linking the isolation interlock cam 14 and the isolation indicator 16. The interlock cam 14 moves the isolation interlock plate 13 downwards, causing the circuit breaker 1's opening / closing lock plate 19 to move downwards, locking the grounding operating shaft 12 while simultaneously unlocking the circuit breaker 1's opening / closing knob 4. Then, rotating the circuit breaker 1's opening / closing knob 4 closes the circuit breaker 1. After the circuit breaker 1 closes, the rotation of the circuit breaker 1 mechanism's output shaft links the circuit breaker 1 mechanism's interlocking crank arm 5 to press down the circuit breaker interlock plate 6, locking the isolation operating shaft 18. After this operation, both the isolation mechanism 2 and the circuit breaker 1 are in the closed state (e.g., ...). Figure 7 (As shown).

[0051] II. Power Outage Operation: Operate the open / close knob 4 of circuit breaker 1 to open circuit breaker 1. The output shaft of circuit breaker 1 rotates to unlock the interlocking arm 5, pressing down on the circuit breaker interlocking plate 6. The reset spring 9 causes the circuit breaker interlocking plate 6 to move upward. The upward movement of the circuit breaker interlocking plate 6 drives the counting spring 10 to reset, causing the counter 11 to advance one digit. At the same time, the blocking of the isolating operating shaft 18 is released. Insert the operating handle to perform the isolating opening operation. The output shaft of the isolating mechanism 2 rotates, linking the isolating interlocking cam 14 and the isolating indicator 16. The interlocking cam 14 moves the isolating interlocking plate 13 upward, causing the circuit breaker 1 open / close locking plate 19 to move upward, blocking the open / close knob 4 of circuit breaker 1, making it inoperable. At the same time, the blocking of the grounding operating shaft 12 is released. After completing this operation, both the isolating switch and circuit breaker 1 are in the open state (e.g., Figure 6 (As shown).

[0052] III. Grounding Inspection Operation: Insert the operating handle into the grounding operating shaft 12, rotate the operating handle to ground the isolation mechanism 2, and simultaneously rotate the output shaft of the isolation mechanism 2 to link the isolation interlock cam 14 and the isolation indicator 16. The interlock cam 14 moves the isolation interlock plate 13 upward, blocking the isolation operating shaft 18. Also, release the interlock of the lower door interlock plate 303, lift and open the lower door, and then the lower door reset spring 9 will move the lower door interlock plate 303 upward to block the isolation operating shaft 18 and the grounding operating shaft 12, making it inoperable. After completing this operation, the disconnect switch is in the grounded state; it can be inspected (e.g., ...). Figure 8 (As shown).

[0053] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A five-proof interlocking device for a ring main unit, characterized in that, It includes a circuit breaker and an isolation mechanism installed in a ring main unit box, as well as an interlocking plate assembly that connects the circuit breaker and the isolation mechanism. The circuit breaker panel is provided with an opening and closing knob, and the isolation mechanism panel is provided with an isolation operating shaft and a grounding operating shaft. The interlocking plate assembly includes an isolation interlocking plate, a switching interlocking plate, and a circuit breaker interlocking plate. The isolation interlocking plate is movably mounted on the isolation mechanism panel and is drivenly connected to the output shaft of the isolation mechanism. The switching interlocking plate is connected to the isolation interlocking plate and cooperates with the switching knob. The circuit breaker interlocking plate is movably mounted on the circuit breaker mechanism panel and is drivenly connected to the output shaft of the circuit breaker. When power is supplied, the isolation mechanism closes and drives the isolation interlock plate to move and block the grounding operating shaft, and drives the opening and closing lock plate to unlock the opening and closing knob. Then the circuit breaker closes and drives the circuit breaking interlock plate to move and block the isolation operating shaft. When a power outage operation is performed, the circuit breaker trips, causing the circuit breaker interlock plate to release the blockage of the isolation operating shaft. Subsequently, the isolation mechanism trips and drives the isolation interlock plate to move, releasing the blockage of the grounding operating shaft and causing the opening / closing lock plate to move and lock the opening / closing knob. When a grounding operation is performed, the isolation mechanism grounds and drives the isolation interlock plate to move and lock the isolation operating shaft.

2. The five-proof interlocking device for the ring main unit as described in claim 1, characterized in that: The circuit breaker and the isolating mechanism are arranged vertically. The isolating interlock plate is vertically slidably installed on the isolating mechanism panel. The opening and closing interlock plate is vertically slidably installed inside the circuit breaker and its bottom end is connected to the top end of the isolating interlock plate. The circuit breaking interlock plate is vertically slidably installed on the circuit breaker panel.

3. The five-proof interlocking device for the ring main unit as described in claim 2, characterized in that: The output shaft of the isolation mechanism is equipped with an interlocking cam, and the isolation interlocking plate is provided with a groove. The interlocking cam cooperates with the groove to realize the up and down movement of the isolation interlocking plate.

4. The five-proof interlocking device for the ring main unit as described in claim 2, characterized in that: The circuit breaker interlock plate is adapted to be connected to the circuit breaker via an elastic element, and the output shaft of the circuit breaker is equipped with an interlocking crank arm; when the circuit breaker is closed, the circuit breaker interlock plate is adapted to move downward under the squeezing action of the interlocking crank arm; when the circuit breaker is closed, the interlocking crank arm is adapted to move away from the circuit breaker interlock plate, and then the circuit breaker interlock plate moves upward and reset under the action of elastic force.

5. The five-proof interlocking device for a ring main unit as described in any one of claims 1-4, characterized in that: The isolation mechanism is equipped with an interlocking component that cooperates with the lower door of the ring main unit; when the lower door is removed, the interlocking component is adapted to lock the isolation operating shaft and the grounding operating shaft.

6. The five-proof interlocking device for the ring main unit as described in claim 5, characterized in that: The interlocking device includes a lower door interlocking plate and an interlocking rod. The lower door interlocking plate is elastically and vertically slidably installed within the isolation mechanism, and the interlocking rod is vertically connected to the bottom end of the lower door interlocking plate. When the lower door is hooked and installed in the ring main unit box via the interlocking rod and is in the locked position, the lower door interlocking plate is adapted to move downward under the action of the lower door and release the blockage of the isolation operating shaft and the grounding operating shaft. When the lower door is removed, the lower door interlocking plate is adapted to move upward under the action of elastic force and block the isolation operating shaft and the grounding operating shaft.

7. The five-proof interlocking device for ring main units as described in claim 4, characterized in that: The circuit breaker is equipped with a counter, which is connected to the circuit breaker interlock plate. The counter is adapted to record the number of times the circuit breaker is closed and opened by moving the circuit breaker interlock plate.

8. The five-proof interlocking device for ring main units as described in claim 2, characterized in that: The top of the locking plate has a plug-in part, and the outer circumference of the locking knob has a slot. The plug-in part cooperates with the slot to lock the locking knob.

9. The five-proof interlocking device for a ring main unit as described in claim 2, characterized in that: Both the circuit breaker and the isolation mechanism are equipped with multiple guide nuts via multiple guide bolts. The isolation interlock plate, the opening and closing interlock plate, and the circuit breaker interlock plate are all provided with multiple waist-shaped grooves on their exteriors. The waist-shaped grooves cooperate with the corresponding guide bolts and guide nuts to achieve sliding installation of the plates.

10. The five-proof interlocking device for a ring main unit as described in claim 1, characterized in that: The isolation mechanism is equipped with an isolation program lock and a grounding electromagnetic lock. The isolation program lock is configured with the isolation operating shaft, and the grounding electromagnetic lock is engaged with the grounding operating shaft.

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