An outdoor pole-mounted circuit breaker installed with a dual indication system based on a redundancy design

Abstract

The utility model belongs to the technical field of pole switch, disclose a kind of outdoor pole circuit breaker of double indicating system of installation based on redundancy design. The circuit breaker is fixedly connected together by shell assembly, combination and separation indicating assembly, energy storage component, pole assembly, combination and separation operating assembly, incoming line terminal, outgoing line terminal, combined mutual inductor, bottom plate assembly. The double indicating system of the utility model can be verified mutually, when two sides indicate inconsistency, operation and maintenance personnel can realize that system may exist fault, need timely repair, avoid the safety accident caused by error indication. Provide the indicating mode of multi-angle, more convenient to observe, facilitate operation and maintenance personnel to confirm circuit breaker state from different direction quickly, improve patrol efficiency and security.

Description

Technical Field

[0001] This utility model belongs to the field of pole-mounted switch technology, and in particular relates to an outdoor pole-mounted circuit breaker equipped with a dual indicator system based on redundancy design. Background Technology

[0002] Pole-mounted circuit breakers, as key control and protection devices in power distribution networks, are widely installed on outdoor utility poles, undertaking important functions such as line switching, fault isolation, and power restoration. To ensure that maintenance personnel can clearly determine the current operating status (closed or open) of the circuit breaker from a distance, existing pole-mounted circuit breakers generally have a mechanical open / close indicator device on the side of their enclosure. This indicator device is usually located on the same side as the energy storage shaft and the open / close operating shaft. Its basic working principle is as follows: an open / close indicator shaft passes through the side wall of the enclosure, and its outer end is fixed with a pointer piece by a set screw. The pointer piece rotates with the shaft, pointing to the "closed" and "open" indicator plates on the enclosure's marking panel, respectively. The inner end of the open / close indicator shaft is welded with a crank arm, which is connected to a pin on the main shaft of the circuit breaker. When the main shaft moves linearly under the drive of the operating mechanism, it drives the crank arm through the pin, thereby causing the open / close indicator shaft and the external pointer piece to rotate, thus indicating the status.

[0003] Based on the above analysis, the problems and shortcomings of the existing technology are as follows: Susceptible to interference from the external environment, leading to jamming and failure: Pole-mounted circuit breakers are exposed to harsh outdoor environments (wind, rain, dust, densely wooded areas, etc.). Strong winds can easily blow away foreign objects such as tree branches and plastic bags, causing them to become lodged in the narrow gap between the side of the enclosure and the pointer plates. Once jamming occurs, the indicating mechanism will not be able to rotate freely, resulting in a mismatch between the indicated status and the actual position inside the circuit breaker, creating a false indication. This poses a serious safety threat to maintenance personnel, potentially leading to misjudgments of the line's energized state and causing electric shock or other safety accidents.

[0004] The reliability of the indicator is greatly affected by vibration: the circuit breaker generates severe mechanical vibration during opening and closing operations, and is also subjected to electrodynamic vibration from the line current over a long period of time. The screw fixing method commonly used for the pointer plate is prone to loosening or even falling off under long-term vibration, resulting in complete failure of the indicating function and reducing the overall reliability of the equipment.

[0005] Inconvenient for operation and maintenance observation: The indicator device is located on the side of the enclosure. When maintenance personnel are inspecting from the ground or on a pole, their view may be obstructed, and they need to find a specific angle to observe it, which increases the difficulty and inconvenience of the inspection work.

[0006] Single point of failure risk: The existing design only has a single indicator point. Once a failure occurs at this point, maintenance personnel will completely lose the intuitive visual judgment of the circuit breaker status and can only rely on other potentially unreliable electrical signals or close-range voltage testing, which greatly increases the difficulty and risk of maintenance.

[0007] The aforementioned technical defects in existing technologies are directly related to the operational safety and maintenance efficiency of the power grid, and are long-standing problems in the industry that need to be solved. Utility Model Content

[0008] To overcome the problems existing in related technologies, this utility model discloses an outdoor pole-mounted circuit breaker equipped with a dual-indication system based on redundancy design. Specifically, it relates to a dual-indication system for an outdoor pole-mounted circuit breaker based on redundancy design. Addressing the shortcomings of single-side indicating mechanisms in harsh outdoor environments, such as susceptibility to jamming, loosening, and failure, this utility model provides a dual-protection, more reliable, and unaffected-by-side foreign objects status indication mechanism. This significantly improves the accuracy and reliability of the pole-mounted circuit breaker status indication and reduces maintenance safety risks. This utility model provides a multi-angle, more easily observable indication method, allowing maintenance personnel to quickly confirm the circuit breaker status from different angles (especially from below), improving inspection efficiency and safety.

[0009] The technical solution is as follows: an outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design, the outdoor pole-mounted circuit breaker including a housing assembly, a closing / opening indicator assembly, an energy storage assembly, a pole assembly, a closing / opening operation assembly, and a base plate assembly; The pole assembly is installed on top of the housing assembly. The insulating pull rod end inside the pole assembly extends into the housing assembly and connects to the closing and opening pull plate on the main shaft assembly inside the housing assembly. One end of the main shaft assembly is connected to the operating mechanism, and the other end of the main shaft assembly is connected to the closing and opening shaft. Both ends of the closing and opening shaft are fixed together with the opening spring. The buffer assembly is installed on one end of the housing assembly, corresponding to the main shaft assembly. The closing / opening indicator component, energy storage component, and closing / opening operation component are all centrally mounted on the same side of the housing component and are all connected to the internal operating mechanism; One end of the split-distribution shaft is connected to the split-distribution indicator welding shaft of the split-distribution indicator assembly. The horizontal linear movement of the split-distribution shaft to the right or left will drive the split-distribution indicator welding shaft to rotate. The outer end of the split-distribution indicator welding shaft is fixedly connected to a side pointer. The split-distribution indicator welding shaft drives the side pointer to rotate, pointing to the split or combine character on the split-distribution indicator plate of the split-distribution indicator assembly. The base plate assembly is fixed to the bottom of the housing assembly with screws; the base plate assembly and the spindle assembly move linearly to the left or right in the horizontal direction, thereby driving the bottom opening / closing indicator shaft of the base plate assembly to rotate, which in turn causes the bottom pointer of the base plate assembly to point to the opening / closing indicator plate.

[0010] Furthermore, the opening and closing indicator flange is fixed to the positioning guide sleeve by fixing screws.

[0011] Furthermore, each phase pole of the pole assembly is encapsulated with a vacuum interrupter. The bottom of the pole assembly is provided with a metal flange, which is firmly connected to the mounting plate on the top of the housing assembly by multiple bolts. An O-ring or gasket is placed between the metal flange and the housing mounting plate. An insulating rod is installed inside the pole assembly. One end of the insulating rod is connected to the moving contact of the vacuum interrupter, and the other end of the insulating rod extends into the housing assembly. The main shaft assembly and the pole assembly are connected to the insulating rod through the closing and opening pull plates.

[0012] The power provided by the operating mechanism is transmitted through the main shaft assembly to the moving contact of the vacuum interrupter inside the pole post assembly via the opening and closing pull plates and the insulating pull rod, thereby driving the moving contact of the vacuum interrupter to open and close.

[0013] The top of the pole assembly is equipped with an inlet terminal, and the middle of the pole assembly is equipped with a copper conductive rod. The central circular hole on the combined current transformer passes through the copper conductive rod, and the end of the copper conductive rod is equipped with a terminal. One end of the terminal is pressed against the combined current transformer, fixing the combined current transformer to the pole assembly. The other end of the combined current transformer is an L-shaped cylindrical metal tube that goes into the housing assembly and is fixed to the housing assembly by a nut. The secondary side lead of the CT is arranged inside the L-shaped cylindrical tube and connected to the terminal block inside the housing assembly.

[0014] The spindle assembly consists of a spindle, a transmission crank arm, a flat washer, a pin, and a cotter pin; The transmission crank arm is fixed to the main shaft by a flat washer, a pin, and a cotter pin; the transmission crank arm is connected to the main shaft pin.

[0015] The base plate assembly also includes: base plate, positioning and fixing sleeve, indicator mounting plate, pop rivets, fastening screws, cross-slot fixing screws, snap rings, flanges, and bottom opening and closing indicator shafts; The positioning and fixing sleeve is opened on the base plate, and the bottom opening and closing indicator shaft is fixed by cross-slot screws and snap rings to allow the flange to be rotatably mounted on the positioning and fixing sleeve; The bottom pointer is fixed to the bottom end of the bottom opening / closing indicator shaft by a fastening screw; The sign mounting plate is installed on the base plate by pop rivets, and the signboard is fixed on the sign mounting plate.

[0016] The closing / opening indicator component, energy storage component, and closing / opening operation component are all connected to the operating mechanism through shafts, sleeves, and seals passing through the welded housing.

[0017] Combining all the above technical solutions, the beneficial effects of this invention are as follows: (1) This utility model aims to solve the problems of insufficient reliability and single point of failure in the status indication system of pole-mounted circuit breakers. Specifically, it solves the following defects of the prior art: This utility model solves the problem of the indication system being easily interfered with in outdoor environments: Through the design of the dual indication system, even if the side indication is blocked by external factors such as tree branches, ice and snow, the bottom indication can still work normally, which greatly improves the reliability in harsh outdoor environments. It overcomes the problem of limited visibility: The dual position indication provides the possibility of multi-angle observation. The maintenance personnel can view the status from both the side and bottom perspectives, reducing blind spots and the risk of misjudgment. It reduces the risk of single point of failure: The dual indication design ensures that when one indication system fails, the other can still provide accurate status information, which greatly improves the redundancy and reliability of the system. It provides a means of status verification: The dual indication system can verify each other. When the two indications are inconsistent, the maintenance personnel can realize that the system may have a fault and need to be repaired in time, avoiding safety accidents caused by incorrect indications.

[0018] (2) Dual-indicator redundant system architecture of this utility model: It innovatively proposes a dual-indicator scheme that simultaneously sets up a side indicator mechanism and a bottom indicator mechanism on the pole-mounted circuit breaker. The two systems are independent of each other and serve as backups for each other, fundamentally improving the safety of the indicator function. Even if the side indicator is stuck due to external factors such as tree branches, ice and snow, the bottom indicator can still work normally, greatly improving the reliability in harsh outdoor environments. Direct drive design of the bottom indicator mechanism of this utility model: The bottom indicator mechanism is not indirectly driven by the side opening and closing indicator shaft, but is directly fixed to the main shaft of the circuit breaker arc-extinguishing chamber contact system through an independent transmission connection (such as the main shaft linkage crank arm and the opening and closing indicator shaft coupling). The movement of the main shaft does not need to go through the intermediate conversion shaft and is directly and without delay transmitted to the bottom opening and closing indicator shaft, ensuring the accuracy and real-time performance of the indication. Optimized installation structure and position of this utility model: The second indicator point is innovatively arranged on the bottom plate of the box. This position has natural advantages: anti-jamming: The bottom plate faces the ground and is shielded by the box above, greatly reducing the possibility of tree branches and foreign objects falling in and jamming the pointer. Easier to observe: The dual-position indicator provides multiple viewing angles, allowing maintenance personnel to check the status from both the side and bottom, reducing blind spots and the risk of misjudgment. Maintenance personnel can clearly see the indicator status from below the pole, without needing to climb to a height parallel to the circuit breaker, resulting in a better viewing angle and safer, more efficient inspections. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure; Figure 1 This is a schematic diagram of an outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design, provided in an embodiment of this utility model. Figure 2 This is a schematic diagram showing the connection between the distribution shaft and other structures provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the components of the combination / separation indicator assembly provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the main shaft provided in an embodiment of the present utility model; Figure 5 This is an enlarged schematic diagram of each component of the spindle assembly provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the base plate assembly provided in this embodiment of the utility model; Figure 7 This is an exploded view of the base plate assembly provided in this embodiment of the utility model; Figure 8 This is a schematic diagram of the structure of each component of the base plate assembly provided in this embodiment of the utility model; In the diagram: 1. Housing assembly; 2. Opening / closing indicator assembly; 210. Opening / closing indicator welding shaft; 220. Opening / closing indicator shaft flange; 230. Positioning guide sleeve; 240. Fixing screw; 250. Side pointer; 260. External hexagonal fastening screw; 270. Opening / closing indicator plate; 3. Energy storage assembly; 4. Pole post assembly; 5. Opening / closing operation assembly; 6. Incoming terminal; 7. Outgoing terminal; 8. Combined current transformer; 9. Base plate assembly; 901. Base plate; 902. Positioning fixing sleeve; 903. Indicator plate Mounting plate; 904, Opening / closing indicator; 905, Blind rivet; 906, Bottom pointer; 907, Fastening screw; 908, Cross-slot fixing screw; 909, Snap ring; 910, Flange; 911, Bottom opening / closing indicator shaft; 10, Welded housing; 11, Operating mechanism; 12, Spindle assembly; 1210, Spindle; 1220, Drive crank arm; 1230, Flat washer; 1240, Pin; 1250, Cotter pin; 13, Opening / closing distribution shaft; 14, Opening spring; 15, Buffer assembly. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] Example 1, such as Figures 1-8As shown, the outdoor pole-mounted circuit breaker provided by this utility model, which is equipped with a dual indicator system based on redundancy design, is mainly composed of a housing assembly 1, a closing / opening indicator assembly 2, an energy storage assembly 3, a pole assembly 4, a closing / opening operation assembly 5, an incoming terminal 6, an outgoing terminal 7, a combined current transformer 8, and a base plate assembly 9, which are fixedly connected together.

[0022] The pole assembly 4, mounted above the housing assembly 1, is one of the core components of the pole-mounted circuit breaker. Each phase pole contains a vacuum interrupter (commonly known as a vacuum interrupter), which is the "heart" of the pole-mounted circuit breaker. It is responsible for rapidly extinguishing the arc using a high-vacuum medium when the current crosses zero, safely and reliably interrupting the normal operating current and fault current (such as short-circuit current) of the line. It provides reliable insulation; the vacuum interrupter provides internal insulation. The pole body is made of high-performance insulating materials such as epoxy resin or silicone rubber, manufactured through integral casting or wrapping processes, bearing phase-to-phase insulation and ground insulation, while enabling the pole-mounted circuit breaker to withstand harsh environments (such as rain, snow, fog, and pollution).

[0023] The bottom (flange end) of the pole assembly 4 is designed with a metal flange (usually an insert cast in epoxy resin). This metal flange is securely connected to the mounting plate on the top of the housing assembly 1 by multiple bolts (usually hex bolts or standard bolts). An O-ring or gasket is placed between the metal flange and the housing mounting plate to ensure that the internal mechanism chamber of the housing is isolated from the external environment and to prevent moisture, dust and insects from entering.

[0024] An insulating rod is installed inside the pole assembly 4. One end of the insulating rod is connected to the moving contact of the vacuum interrupter, and the other end extends into the housing assembly 1 and connects to the closing / opening pull plate (not shown in the figure) on the main shaft assembly 12 inside the housing assembly 1. One end of the main shaft assembly 12 is connected to the operating mechanism 11. The main shaft assembly 12 and a certain phase of the pole assembly 4 are connected to the insulating rod via the closing / opening pull plate. The other end of the main shaft assembly 12 is connected to a closing / opening shaft 13, and both ends of the closing / opening shaft 13 are fixed to the opening spring 14. Figure 2 As shown; like Figure 2 As shown, the power provided by the operating mechanism 11 is transmitted through the main shaft assembly 12 to the moving contact of the vacuum interrupter chamber inside the pole post assembly 4 via the opening and closing pull plates and the insulating pull rod, thereby driving it to perform opening and closing operations.

[0025] The top of pole assembly 4 is the input terminal of the pole-mounted circuit breaker, and is equipped with input terminal 6 (e.g. Figure 1 A copper conductive rod (not shown in the figure) is installed in the middle of the pole assembly 4. The combined current transformer 8 is a ring-shaped assembly with a circular through hole in the center. The diameter of this hole is slightly larger than that of the copper conductive rod in the middle of the pole assembly 4. The central circular hole on the combined current transformer 8 passes through this copper conductive rod. The end of the copper conductive rod is the output terminal of the pole-mounted circuit breaker, and an output terminal 7 is installed thereon. One end of the output terminal 7 presses against the combined current transformer 8, firmly fixing the combined current transformer 8 to the pole assembly 4, ensuring that the combined current transformer 8 will not shake. Figure 1 As shown; The other end of the combined current transformer 8 is an L-shaped cylindrical metal tube that passes through the inside of the housing assembly 1 and is fixed to the housing assembly 1 by a nut. The secondary side lead of the CT (small current signal line for measurement or protection) is arranged inside the L-shaped cylindrical tube and connected to the wiring terminal inside the housing assembly 1.

[0026] like Figure 2 The buffer assembly 15 is installed at one end of the housing assembly 1, corresponding to the main shaft assembly 12. The function of the buffer assembly 15 is to absorb and consume the huge residual kinetic energy generated by the circuit breaker during the opening operation, so as to achieve flexible buffering and rapid braking of the moving parts. It can also be understood as the "advanced shock absorber" of the circuit breaker operating system.

[0027] When the circuit breaker trips, the operating mechanism 11 releases a significant amount of energy. This energy primarily performs two tasks: (1) Overcome the contact pressure spring to make the moving and stationary contacts of the vacuum interrupter separate quickly.

[0028] (2) Drives a series of components such as connecting rods, main shafts, and insulating tie rods to move at high speed.

[0029] After the contacts separate, the motion system still possesses significant speed and kinetic energy. If this residual kinetic energy is allowed to propel the moving parts at high speed to impact the mechanical limit endpoint of the mechanism (i.e., the "hard stop"), a series of serious problems will arise: (1) Mechanical damage and deformation: The huge impact force can cause plastic deformation, loosening or even breakage of key components such as spindle, connecting rod, and bearing.

[0030] (2) Loose screws: Strong vibrations can cause the fastening screws inside the box to loosen, resulting in unstable mechanical properties.

[0031] (3) Malfunction or damage to the operating mechanism 11: The impact force will be directly transmitted back to the precision operating mechanism 11, which may cause damage to the mechanism parts or cause the stored energy mechanism to accidentally disengage.

[0032] (4) Generates huge noise: The rigid impact of metal parts will generate very loud and disturbing noise.

[0033] (5) Shorten equipment life: Each tripping is a severe mechanical shock, which will drastically shorten the mechanical life of the circuit breaker.

[0034] like Figure 1 As shown, the closing / opening indicator component 2, energy storage component 3, and closing / opening operation component 5 are all centrally mounted on the same side of the housing component 1. They are not simply fixed to the surface with screws, but rather connected to the internal operating mechanism 11 via shafts, sleeves, and seals passing through the welded housing 10. This ensures the airtightness of the housing while fulfilling its function, preventing moisture and dust from entering. Figure 2 As shown.

[0035] The main function of the closing / opening indicator component 2 is to clearly and intuitively display the current contact status of the circuit breaker—whether it is closed or open. This is the most important and intuitive visual basis for judging whether the line is energized and whether safe maintenance can be carried out.

[0036] The main function of energy storage component 3 is to provide a mechanical interface for manually storing energy for the closing spring of the circuit breaker. When the automatic energy storage motor fails or there is a power outage, maintenance personnel use this component to store the energy needed for closing the circuit breaker.

[0037] The main function of the closing and opening operation component 5 is to provide a mechanical interface for manually closing and opening the circuit breaker. It is the ultimate means for maintenance personnel to directly control the circuit breaker during power outages or when automatic control fails.

[0038] like Figure 2 As shown, the dispensing shaft 13 passes through one end of the main shaft assembly 12, and opening springs 14 are connected to both sides of the dispensing shaft 13. The main shaft assembly 12 achieves horizontal linear motion under the drive of the operating mechanism 11. Figure 2 For example, when the pole-mounted circuit breaker is closed, the main spindle assembly 12 moves horizontally to the right; when the pole-mounted circuit breaker is opened, the main spindle assembly 12 moves horizontally to the left. One end of the main spindle assembly 12 is fixedly connected to the closing / discharging shaft 13. When the main spindle assembly 12 moves horizontally to the right or left, it will drive the closing / discharging shaft 13 to move horizontally to the right or left.

[0039] like Figure 3As shown, one end of the closing / discharging shaft 13 is connected to the closing / discharging indicating welding shaft 210 of the closing / discharging indicating assembly 2. The horizontal linear movement of the closing / discharging shaft 13 to the right or left will drive the closing / discharging indicating welding shaft 210 to rotate under the action of the positioning guide sleeve 230 and the closing / discharging indicating shaft flange 220 of the closing / discharging indicating assembly 2. The side pointer 250 is fixedly installed on the closing / discharging indicating shaft flange 220 by an external hexagonal fastening screw 260. The side pointer 250 is fixedly connected to the outer end of the closing / discharging indicating welding shaft 210. Under the rotational movement of the closing / discharging indicating welding shaft 210, the side pointer 250 will also rotate at a certain angle, and then the side pointer 250 will point to the word "discharging" or "closing" on the closing / discharging indicator plate 270. At this time, it represents the closing / discharging status of the pole-mounted circuit breaker. When the side pointer 250 points to the word "discharging", the circuit breaker is in the open state; when the side pointer 250 points to the word "closing", the circuit breaker is in the closed state.

[0040] The opening and closing indicator flange 220 is fixed to the positioning guide sleeve 230 by fixing screws 240.

[0041] like Figure 4 , Figure 5 As shown, the spindle assembly 12 mainly consists of a spindle 1210, a transmission crank arm 1220, a flat washer 1230, a pin 1240, and a cotter pin 1250.

[0042] The transmission crank arm 1220 is fixed to the main shaft 1210 by a flat washer 1230, a pin 1240, and a cotter pin 1250. The transmission crank arm 1220 is fixed to the main shaft 1210 by a pin, rather than by welding or screws. This method is based on a deep consideration of the reliability, maintainability, and mechanical dynamic performance of high-voltage switchgear, and is a very classic and optimized engineering design.

[0043] The impact force when a circuit breaker opens and closes is enormous, and line vibration also occurs during daily operation. Welded joints may develop fatigue cracks under long-term alternating stress; even with anti-loosening washers, screws may gradually loosen under vibration, leading to increased connection play and loss of transmission accuracy.

[0044] The pin 1240 itself is a smooth cylinder with a tight transition fit with the hole, making it inherently less prone to loosening. Most importantly, the cotter pin 1250 at the end is an elastic, mechanical locking device. Once the "feet" of the cotter pin 1250 are pried open, it is virtually impossible for it to fall off on its own under any vibration conditions, providing absolutely reliable axial locking for the pin 1240 on the front and fundamentally solving the problem of loosening.

[0045] This invention does not simply add an identical indicator, but rather uses an innovative independent mechanism, the opening and closing indicator component 2, which is installed at the bottom of the pole-mounted circuit breaker and directly linked to the main shaft 1210. Together with the original mechanism, it forms a highly reliable redundant system, comprehensively solving the long-standing pain points in the industry from the three dimensions of structure, function, and applicability.

[0046] like Figure 5 As shown, a transmission crank arm 1220 is integrated on the spindle assembly 12 and fixed to the spindle 1210 by means of a pin, avoiding many problems caused by welding or screw fixing.

[0047] like Figures 6-8 As shown, the base plate assembly 9 is fixed to the bottom of the housing assembly 1 by screws; the base plate assembly 9 is fixedly connected together by the base plate 901, the positioning and fixing sleeve 902, the indicator mounting plate 903, the opening and closing indicator 904, the pop rivet 905, the bottom pointer 906, the fastening screw 907, the cross-slot fixing screw 908, the snap ring 909, the flange 910, and the bottom opening and closing indicator shaft 911.

[0048] The positioning and fixing sleeve 902 is formed on the base plate 901. The bottom opening and closing indicator shaft 911 is mounted on the positioning and fixing sleeve 902 by the cross-slot fixing screw 908 and the snap ring 909. The bottom end of the bottom opening / closing indicator shaft 911 is fixed with a bottom pointer 906 by a fastening screw 907; The sign mounting plate 903 is bolted to the base plate 901, and the opening and closing sign 904 is fixed on the sign mounting plate 903. The linear motion of the main shaft assembly 12 to the left or right will cause the bottom open / close indicator shaft 911 to rotate at a certain angle, thereby causing the bottom pointer 906 to point to the word "open" or "close" on the open / close indicator plate 904. When the bottom pointer 906 points to the word "open", the circuit breaker is in the open state; when the bottom pointer 906 points to the word "close", the circuit breaker is in the closed state.

[0049] As can be seen from the above embodiments, the dual indicator system for outdoor pole-mounted circuit breakers based on redundant design breaks the traditional mindset of single panel indication and designs an independent, redundant indicator mechanism for pole-mounted circuit breakers that is installed at the bottom.

[0050] This utility model presents a novel technical solution with a simple structure. The solution balances low cost and high reliability, and is flexible and convenient to install. It requires no modification to the core internal structure of the circuit breaker (such as the operating mechanism and arc-extinguishing chamber); it can be achieved simply by adding a basic mechanical linkage device. The structure is simple, the cost is low, and it is easy to implement and promote in production. It significantly improves the safety and ease of maintenance of the equipment, possessing high practical value and market potential.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any modifications, equivalent substitutions and improvements made by any person skilled in the art within the scope of the technology disclosed in the present utility model, within the spirit and principles of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design, characterized in that, The outdoor pole-mounted circuit breaker includes a housing assembly (1), a closing / opening indicator assembly (2), an energy storage assembly (3), a pole assembly (4), a closing / opening operation assembly (5), and a base plate assembly (9). The pole assembly (4) is installed above the housing assembly (1). The insulating pull rod end inside the pole assembly (4) extends into the housing assembly (1) and is connected to the closing and opening pull plate on the main shaft assembly (12) inside the housing assembly (1). One end of the main shaft assembly (12) is connected to the operating mechanism (11), and the other end of the main shaft assembly (12) is connected to the closing and opening shaft (13). Both ends of the closing and opening shaft (13) are fixed together with the opening spring (14). The buffer assembly (15) is installed on one end of the housing assembly (1) and corresponds to the main shaft assembly (12). The closing / opening indicator component (2), the energy storage component (3), and the closing / opening operation component (5) are all installed on the same side of the housing component (1) and are all connected to the internal operating mechanism (11); One end of the split-distribution shaft (13) is connected to the split-distribution indicator welding shaft (210) of the split-distribution indicator assembly (2). The horizontal linear movement of the split-distribution shaft (13) to the right or left will drive the split-distribution indicator welding shaft (210) to rotate. The outer end of the split-distribution indicator welding shaft (210) is fixedly connected to a side pointer (250). The split-distribution indicator welding shaft (210) drives the side pointer (250) to rotate, pointing to the split-distribution indicator sign (270) of the split-distribution indicator assembly (2). The base plate assembly (9) is fixed to the bottom of the housing assembly (1) by screws; the base plate assembly (9) and the spindle assembly (12) move linearly to the left or right in the horizontal direction, thereby driving the bottom opening and closing indicator shaft (911) of the base plate assembly (9) to rotate, thereby driving the bottom pointer (906) of the base plate assembly (9) to point to the opening and closing indicator plate (904).

2. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design as described in claim 1, characterized in that, The opening and closing indicator flange (220) is fixed to the positioning guide sleeve (230) by fixing screws (240).

3. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 1, characterized in that, Each phase pole of the pole assembly (4) is encapsulated with a vacuum interrupter. The bottom of the pole assembly (4) is provided with a metal flange, which is firmly connected to the mounting plate on the top of the housing assembly (1) by multiple bolts. An O-ring or gasket is placed between the metal flange and the housing mounting plate. An insulating rod is installed inside the pole assembly (4). One end of the insulating rod is connected to the moving contact of the vacuum interrupter, and the other end of the insulating rod extends into the housing assembly (1). The main shaft assembly (12) and the pole assembly (4) are connected together with the insulating rod through the closing and opening pull plate.

4. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 3, characterized in that, The power provided by the operating mechanism (11) is transmitted through the main shaft assembly (12) to the moving contact of the vacuum interrupter inside the pole post assembly (4) via the opening and closing pull plate and the insulating pull rod, thereby driving the moving contact of the vacuum interrupter to open and close.

5. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 1, characterized in that, The top of the pole assembly (4) is equipped with an inlet terminal (6), and a copper conductive rod is installed in the middle of the pole assembly (4). The central circular hole on the combined current transformer (8) passes through the copper conductive rod, and the end of the copper conductive rod is equipped with a terminal (7). One end of the terminal (7) presses against the combined current transformer (8) to fix the combined current transformer (8) on the pole assembly (4). The other end of the combined current transformer (8) is an L-shaped cylindrical metal tube that goes into the housing assembly (1) and is fixed to the housing assembly (1) by a nut. The secondary side lead of the CT is arranged inside the L-shaped cylindrical tube and connected to the wiring terminal inside the housing assembly (1).

6. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 1, characterized in that, The spindle assembly (12) consists of a spindle (1210), a transmission crank arm (1220), a flat washer (1230), a pin (1240), and a cotter pin (1250); The transmission crank arm (1220) is fixed on the main shaft (1210) by a flat washer (1230), a pin (1240), and a cotter pin (1250); the transmission crank arm (1220) is connected to the main shaft (1210) by a pin.

7. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 1, characterized in that, The base plate assembly (9) also includes: base plate (901), positioning and fixing sleeve (902), indicator mounting plate (903), pop rivet (905), fastening screw (907), cross-slot fixing screw (908), snap ring (909), flange (910), and bottom opening and closing indicator shaft (911). The positioning and fixing sleeve (902) is opened on the base plate (901). The bottom opening and closing indicator shaft (911) is fixed by cross-slot screws (908) and snap rings (909) to rotatably install the flange (910) on the positioning and fixing sleeve (902). The bottom pointer (906) is fixed to the bottom end of the bottom opening and closing indicator shaft (911) by a fastening screw (907). The sign mounting plate (903) is mounted on the base plate (901) by means of a pop rivet (905), and the sign mounting plate (904) is fixed on the sign mounting plate (903).

8. The outdoor pole-mounted circuit breaker equipped with a dual-indicator system based on redundancy design according to claim 1, characterized in that, The closing and opening indicator assembly (2), the energy storage assembly (3), and the closing and opening operation assembly (5) all pass through the welded housing (10) via shafts, sleeves, and seals and are connected to the operating mechanism (11).

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