A mis-touch proof pole-mounted circuit breaker

Abstract

The utility model discloses a prevent false contact on -pole circuit breaker relates to on -pole circuit breaker technical field, including base, main insulating porcelain bottle, closing support, drive shaft, operating insulator, fixed insulator and contact breaker, and the cooperation of operating insulator is in the middle part of contact breaker, and the key lies in the additional keeping mechanism, and it contains telescopic link, reset spring and limit rod, and the telescopic link is cooperated with closing support telescopic hole, and the top has first abutment plane and the first guide arc surface of back right side, and reset spring connects telescopic hole bottom wall and telescopic link, and the limit rod is located drive shaft, and the top has second abutment plane and the second guide arc surface of back left side, and two abutment planes are abutted when opening. The circuit breaker forms rigid spacing through keeping mechanism, and the unexpected closing caused by strong wind, false contact etc. is prevented, and the operation safety and system stability are guaranteed, and the guide arc surface makes telescopic link automatic contraction when closing, does not increase the operation burden, and the structure is simple and reliable, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the technical field of pole-mounted circuit breakers, specifically to a pole-mounted circuit breaker that prevents accidental activation. Background Technology

[0002] As a key control device in the power distribution system, pole-mounted circuit breakers are widely used in 10kV and below overhead power distribution lines. They mainly undertake functions such as line overload protection, short-circuit fault disconnection, and normal power supply switching. Their operational stability is directly related to the power supply reliability and power safety of the power distribution network.

[0003] In actual operation and maintenance, the opening and closing operations of pole-mounted circuit breakers must strictly follow dispatch instructions and are only performed in specific scenarios such as fault handling, line maintenance, or load adjustment. However, the opening state of traditional pole-mounted circuit breakers relies solely on the structural limit of the operating mechanism, lacking a dedicated opening holding mechanism. When strong winds, vibrations, or collisions with foreign objects occur on the line, or when maintenance personnel are working nearby, accidental contact with components such as the operating insulator or drive shaft can easily cause the switch to rotate and close unexpectedly.

[0004] This accidental closing phenomenon can lead to serious consequences: on the one hand, if the open state is set to facilitate line maintenance, accidental closing will cause the line under maintenance to suddenly become energized, directly threatening the lives of maintenance personnel; on the other hand, if the open state is due to faults such as short circuits or overloads in the line, accidental closing may lead to the expansion of the fault, causing problems such as line tripping and equipment damage, seriously affecting the stable operation of the power distribution system and the continuity of power supply.

[0005] Therefore, in view of the shortcomings of traditional pole-mounted circuit breakers, which are susceptible to accidental closing due to external interference when in the open state, there is an urgent need to develop a pole-mounted circuit breaker with reliable open holding function to eliminate the risk of misoperation and ensure the safe operation and maintenance of power distribution lines and stable power supply. Utility Model Content

[0006] To address the shortcomings in the prior art, this utility model provides a pole-mounted circuit breaker that prevents accidental activation.

[0007] The technical solution adopted by this utility model is: a pole-mounted circuit breaker to prevent accidental contact, including a base, a main insulating porcelain insulator set on the base, a closing bracket fixed on the base, a drive shaft rotatably connected to the closing bracket, an operating insulator rotatably connected to the drive shaft, a fixed insulator fixed on the closing bracket, and a switch blade with one end rotatably connected to the fixed insulator. The middle part of the switch blade is rotatably connected to the top of the operating insulator. The circuit breaker also includes a holding mechanism to keep the switch blade in the open state. The holding mechanism includes a telescopic rod, a return spring, and a limit rod. The telescopic rod is telescopically engaged with the telescopic hole on one side of the closing bracket. A first abutting plane is provided on one side of the top of the telescopic rod, and a first guide arc surface is provided on the right side of the back of the first abutting plane. One end of the return spring is connected to the bottom wall of the telescopic hole, and the other end is connected to the telescopic rod, which is used to reset and pop the telescopic rod out from the telescopic hole; The limiting rod is mounted on the drive shaft. A second abutting plane is provided on the top of the limiting rod, and a second guide arc surface is provided on the left side of the back of the second abutting plane. In the open state, the first abutting plane and the second abutting plane remain in contact.

[0008] Furthermore, the sidewall of the telescopic hole is provided with a guide groove, and the outer wall of the telescopic rod is provided with a guide protrusion that matches the guide groove.

[0009] Furthermore, the cross-sections of the guide groove and the guide ridge are both semi-circular.

[0010] Furthermore, a limiting step ring is provided on one side of the opening of the telescopic hole, and an anti-detachment step ring is provided on the top of the telescopic rod.

[0011] Furthermore, the limiting rod is integrally formed with the drive shaft.

[0012] The beneficial effects of this utility model are: 1. Effectively Eliminates the Risk of Accidental Closure: This application incorporates a retaining mechanism consisting of a telescopic rod, a return spring, and a limit rod. In the open state, the first contact surface of the telescopic rod and the second contact surface of the limit rod are tightly abutted, forming a rigid limit that firmly restricts the rotational tendency of the drive shaft and the switch. Compared to traditional products that rely solely on the operating mechanism's own limit mechanism, this retaining mechanism effectively resists external interference such as strong winds, vibrations, collisions with foreign objects, and accidental contact by maintenance personnel, completely preventing unintended switch closure and significantly improving the safety of power distribution line maintenance and the stability of power supply system operation.

[0013] 2. Convenient and smooth closing operation without adding extra operational burden: The telescopic rod and limit rod of the holding mechanism are designed with a first guide arc surface and a second guide arc surface, respectively. When normal closing is required, the drive shaft rotates, causing the limit rod to rotate synchronously. The second guide arc surface of the limit rod will smoothly contact the first guide arc surface of the telescopic rod and generate a squeezing force, causing the telescopic rod to overcome the elastic force of the reset spring and retract into the telescopic hole, releasing the limit constraint on the limit rod. The entire process does not require additional manual operation of the telescopic rod; the limit release is completed naturally through the normal closing action. The operation procedure is consistent with that of traditional pole-mounted circuit breakers, without increasing the operation steps and burden of maintenance personnel, thus balancing reliability against accidental contact and ease of operation.

[0014] 3. Simple and reliable structure with strong adaptability: The core components of the holding mechanism only include the telescopic rod, the return spring and the limit rod. The structure is simple and there are no complex electrical control components. It is not only easy to manufacture and cost controllable, but also effectively reduces the probability of failure during long-term use.

[0015] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 A schematic diagram showing a localized explosion at the mechanism.

[0019] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the telescopic rod and the return spring.

[0021] Figure 5 This is a schematic diagram of a partial cross-section of the telescopic pole.

[0022] Figure 1-5 In the middle: 1. Base; 2. Main insulating porcelain bottle; 3. Closing bracket; 4. Drive shaft; 5. Operating insulator; 6. Fixed insulator; 7. Knife switch; 8. Telescopic rod; 9. Return spring; 10. Limiting rod; 11. Telescopic hole; 12. First abutment plane; 13. First guide arc surface; 14. Second abutment plane; 15. Second guide arc surface; 16. Guide groove; 17. Guide protrusion; 18. Limiting step ring; 19. Anti-detachment step ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] This utility model provides a pole-mounted circuit breaker to prevent accidental activation.

[0026] In this embodiment, refer to Figure 1-5 The anti-misoperation pole-mounted circuit breaker includes a base 1, a main insulating porcelain insulator 2 mounted on the base 1, a closing bracket 3 fixed on the base 1, a drive shaft 4 rotatably engaged with the closing bracket 3, an operating insulator 5 rotatably connected to the drive shaft 4, a fixed insulator 6 fixed on the closing bracket, and a switch 7 with one end rotatably engaged with the fixed insulator. The middle part of the switch 7 rotatably engages with the top of the operating insulator. It also includes a holding mechanism for keeping the switch in the open state. The holding mechanism includes a telescopic rod 8, a return spring 9, and a limit rod 10. The telescopic rod is telescopically engaged with the telescopic hole 11 on one side of the closing bracket. A first abutting plane 12 is provided on one side of the top of the telescopic rod 10, and a first guide arc surface 13 is provided on the right side of the back of the first abutting plane 12. One end of the return spring is connected to the bottom wall of the telescopic hole, and the other end is connected to the telescopic rod, which is used to reset and pop the telescopic rod out from the telescopic hole; The limiting rod is mounted on the drive shaft. A second abutting surface 14 is provided on the top of the limiting rod. A second guide arc surface 15 is provided on the left side of the back of the second abutting surface 14. In the open state, the first abutting surface and the second abutting surface remain in contact.

[0027] In the above technical solution, by adding a holding mechanism to the traditional pole-mounted circuit breaker structure, when the circuit is opened, the reset spring pushes the telescopic rod out of the telescopic hole of the closing bracket, so that the first abutting plane at the top of the telescopic rod is rigidly abutted against the second abutting plane of the upper limit rod of the drive shaft, restricting the rotation of the drive shaft and effectively preventing accidental closing; when the circuit is closed, the drive shaft drives the limit rod to rotate, and the second guide arc surface of the limit rod is pressed against the first guide arc surface of the telescopic rod, forcing the telescopic rod to compress the reset spring and retract into the telescopic hole, releasing the limit and not affecting the normal closing operation.

[0028] This application fills the gap in traditional circuit breakers that lack a dedicated holding mechanism for tripping. It uses rigid contact to resist external interference, eliminates the risk of accidental closing, and ensures the safety of maintenance personnel and the stability of the power distribution system. At the same time, it utilizes a guide arc surface to achieve smooth closing without additional operation, balancing reliability and convenience.

[0029] Specifically, the side wall of the telescopic hole is provided with a guide groove 16, and the outer wall of the telescopic rod is provided with a guide protrusion 17 that matches the guide groove 16.

[0030] In this embodiment, a guide groove is provided on the side wall of the telescopic hole, and a matching guide protrusion is provided on the outer wall of the telescopic rod. This ensures that the telescopic rod can only move axially along the guide groove within the telescopic hole, preventing circumferential rotation of the telescopic rod due to external forces or spring forces. This ensures that the first contact plane and the first guide arc surface of the telescopic rod are always correctly aligned with the second contact plane and the second guide arc surface of the limiting rod, preventing contact failure due to rod rotation or poor guidance during closing, thus improving the stability of the holding mechanism.

[0031] Specifically, both the guide groove and the guide ridge have a semi-circular cross-section.

[0032] In this embodiment, the telescopic rod's extension and retraction movements are made smoother, reducing the wear rate of components and extending the service life of the retaining mechanism; moreover, the semi-circular structure is easy to process, facilitating mass production and controlling manufacturing costs.

[0033] Specifically, a limiting step ring 18 is provided on one side of the opening of the telescopic hole, and an anti-detachment step ring 19 is provided on the top of the telescopic rod.

[0034] In this embodiment, the telescopic rod is prevented from coming out of the telescopic hole due to excessive spring force of the reset spring, thus avoiding failure of the holding mechanism, ensuring that the circuit breaker can always achieve effective limit when opening, and improving the overall reliability of the circuit breaker.

[0035] Specifically, the limiting rod is integrally formed with the drive shaft.

[0036] In this embodiment, the limiting rod and the drive shaft are manufactured using an integral molding process, making them an inseparable whole without the need for additional connecting structures (such as bolts or welding) for fixation.

[0037] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A pole-mounted circuit breaker with anti-misoperation capability, comprising a base, a main insulating porcelain insulator mounted on the base, a closing bracket fixed on the base, a drive shaft rotatably coupled to the closing bracket, an operating insulator rotatably connected to the drive shaft, a fixed insulator fixed on the closing bracket, and a switch blade with one end rotatably coupled to the fixed insulator, wherein the middle portion of the switch blade rotatably engages with the top of the operating insulator, characterized in that: It also includes a holding mechanism that keeps the switch in the open state, the holding mechanism including a telescopic rod, a return spring and a limit rod; The telescopic rod is telescopically engaged with the telescopic hole on one side of the closing bracket. A first abutting plane is provided on one side of the top of the telescopic rod, and a first guide arc surface is provided on the right side of the back of the first abutting plane. One end of the return spring is connected to the bottom wall of the telescopic hole, and the other end is connected to the telescopic rod, which is used to reset and pop the telescopic rod out from the telescopic hole; The limiting rod is mounted on the drive shaft. A second abutting plane is provided on the top of the limiting rod, and a second guide arc surface is provided on the left side of the back of the second abutting plane. In the open state, the first abutting plane and the second abutting plane remain in contact.

2. The pole-mounted circuit breaker for preventing accidental contact according to claim 1, characterized in that: The side wall of the telescopic hole is provided with a guide groove, and the outer wall of the telescopic rod is provided with a guide protrusion that matches the guide groove.

3. The pole-mounted circuit breaker for preventing accidental contact according to claim 2, characterized in that: Both the guide groove and the guide ridge have semi-circular cross-sections.

4. The pole-mounted circuit breaker for preventing accidental contact according to claim 1, characterized in that: A limiting step ring is provided on one side of the opening of the telescopic hole, and an anti-detachment step ring is provided on the top of the telescopic rod.

5. The pole-mounted circuit breaker for preventing accidental contact according to claim 1, characterized in that: The limiting rod is integrally formed with the drive shaft.

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