A pole-mounted circuit breaker with fast opening and closing

Abstract

The utility model discloses a pole circuit breaker with quick opening and closing, which comprises a shell, an installation plate is fixedly connected in the shell, a motor is fixedly connected on the installation plate, a connecting shaft is fixedly connected to the output end of the motor, one end of the connecting shaft is rotatably connected to the installation plate, and the other end is rotatably connected to the shell, the utility model replaces the translation drive with the rotary drive, drives the insulating rod to move by the cam on the connecting shaft, thereby shortening the overall length of the equipment, adapting to the narrow installation space of the outdoor pole, and the insulating rod is driven to move downward by the first spring elastic force and gravity when opening, the electromagnetic repulsion and the second spring thrust are matched to accelerate the rotation of the connecting shaft, the opening speed is significantly improved, the high-voltage power grid quick breaking demand is satisfied, meanwhile, the three-stage damping structure of the electromagnetic repulsion pre-deceleration, the second spring buffer and the energy absorption of the rubber pad is adopted to replace the single flexible pad, the permanent magnet impact energy is reduced, the damping component fatigue attenuation is avoided, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pole-mounted circuit breaker technology, and in particular to a pole-mounted circuit breaker with fast opening and closing. Background Technology

[0002] A pole-mounted circuit breaker is an outdoor high-voltage switchgear installed on a utility pole, widely used in power distribution networks of 10kV and below. Its core function is to perform opening and closing operations on the line. When a fault such as a short circuit or overload occurs, it can quickly cut off the fault current to prevent the fault from spreading; at the same time, it can isolate the faulty section and ensure the normal power supply to the non-faulty areas. The opening and closing operations of pole-mounted circuit breakers are achieved by opening and closing mechanisms. For example, the fast opening and closing integrated primary and secondary pole-mounted circuit breaker disclosed in Chinese Utility Model Patent No. CN222867586U eliminates the multi-link structure design in its linkage mechanism. It utilizes the structure design of the fixed base to realize the movement and support of the insulating column, which can effectively avoid opening and closing failures and equipment malfunctions caused by link breakage. During linkage, the insulating column slides between the first positioning plane and the second positioning concave arc surface to realize opening and closing. Not only is the opening and closing fast and energy-efficient, but it also only needs to overcome the gravity of the pole and a small amount of sliding friction. Moreover, the fixed base is not easily damaged, and its service life is greatly extended. The shock-absorbing component combined with the shock-absorbing design of the flexible pad can reduce the reaction force when the two collide with each other, and the vibration after the collision is greatly reduced, effectively protecting the stability of the drive rod and the base. It can quickly stabilize the position of the drive rod and ensure fast and stable opening and closing and position locking.

[0003] However, the aforementioned pole-mounted circuit breaker still has the following drawbacks: 1. It drives the fixed base to translate via a drive rod, thereby pushing the insulating column upward to the first positioning plane to achieve closing. When the fixed base translates in the reverse direction, the insulating column falls onto the second positioning concave arc surface due to its own gravity, thereby achieving opening. First, the translation drive needs to reserve a complete linear motion stroke for the fixed base, directly leading to an increase in the overall length of the equipment. In space-constrained scenarios such as outdoor pole-mounted installation, this not only increases the installation difficulty but may also cause layout conflicts due to excessive size; second, the opening speed of the circuit breaker directly affects... 1. The timely interruption of fault current is crucial. Relying solely on the weight of the insulating column to complete the tripping is limited by the constant acceleration due to gravity and sliding friction resistance, making it difficult to meet the stringent requirements of high-voltage power grids for rapid tripping. 2. The locking of the drive rod depends on the attraction force of the permanent magnets at both ends. At the moment the magnets separate, the drive rod will impact the flexible pad at a high speed due to inertia. This high-frequency, high-energy direct impact will cause the flexible pad to gradually experience material fatigue and elasticity decay. With the accumulation of usage and the passage of time, the shock absorption efficiency of the flexible pad will significantly decrease. Utility Model Content

[0004] The purpose of this invention is to provide a pole-mounted circuit breaker with fast opening and closing to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pole-mounted circuit breaker with fast opening and closing, including a housing, an installation plate fixedly connected inside the housing, a motor fixedly connected to the installation plate, a connecting shaft fixedly connected to the output end of the motor, one end of the connecting shaft being rotatably connected to the installation plate, and the other end being rotatably connected to the housing, a plurality of cams being fixedly connected to the connecting shaft, an insulating rod being slidably connected through the housing at the position corresponding to the cam, a first mounting seat being fixedly connected to the bottom end of the insulating rod, a roller being hinged to the first mounting seat and the roller being rotatably connected to the cam, a first spring being sleeved on the insulating rod, one end of the first spring being disposed on the housing, and the other end being disposed on the first mounting seat.

[0006] Preferably, a pole post is fixedly connected to the housing at the position corresponding to the insulating rod.

[0007] Preferably, a second mounting base is fixedly connected to the connecting shaft, a permanent magnet is fixedly connected to the second mounting base, and shock-absorbing components are provided on both sides of the permanent magnet, and the shock-absorbing components are mounted on the mounting plate.

[0008] Preferably, the shock absorption assembly includes a base plate, a magnetic post, a second spring, a coil, a rubber pad, a sleeve, a limiting flange, and a sliding sleeve. The base plate is fixedly connected to the mounting plate, the magnetic post is fixedly connected to the base plate, the coil is sleeved on the magnetic post, the sleeve is sleeved on the coil, and both the coil and the sleeve are fixedly connected to the base plate. A sliding sleeve is slidably connected to the sleeve, and a second spring is sleeved on the sleeve. One end of the second spring is disposed on the sliding sleeve, and the other end is disposed on the base plate.

[0009] Preferably, a limiting flange is fixedly connected to the sleeve, and the limiting flange is sleeved inside the sliding sleeve.

[0010] Preferably, a rubber pad is fixedly connected to the top of the magnetic post.

[0011] This utility model provides a pole-mounted circuit breaker with fast opening and closing, which has the following advantages: This utility model replaces translational drive with rotational drive, using a cam on the connecting shaft to drive the insulating rod, thereby shortening the overall length of the equipment and adapting to the narrow installation space on outdoor poles; during opening, the insulating rod is driven downward by the combined force of the first spring and gravity, and the electromagnetic repulsion and the thrust of the second spring accelerate the rotation of the connecting shaft, significantly improving the opening speed and meeting the rapid disconnection requirements of high-voltage power grids; simultaneously, it adopts a three-stage shock absorption structure of electromagnetic repulsion pre-deceleration, second spring buffer, and rubber pad energy absorption, replacing a single flexible pad, reducing the impact energy of the permanent magnet, avoiding fatigue attenuation of the shock absorption components, and thus extending the service life of the equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the three-dimensional cross-sectional structure of the shell of this utility model; Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle; Figure 3 This is a three-dimensional cross-sectional view of the shock-absorbing component of this utility model; Figure 4 This is a schematic diagram of the overall main structure of this utility model.

[0014] In the diagram: 1. Housing; 11. Mounting plate; 12. Pole post; 2. Motor; 21. Connecting shaft; 22. Cam; 23. Insulating rod; 24. First mounting seat; 25. Roller; 26. First spring; 27. Second mounting seat; 28. Permanent magnet; 3. Shock absorption assembly; 31. Base plate; 32. Magnetic guide post; 33. Second spring; 34. Coil; 35. Rubber pad; 36. Sleeve; 37. Limiting flange; 38. Sliding sleeve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Please see the appendix Figure 1 -Appendix Figure 4This utility model provides an embodiment of a pole-mounted circuit breaker with fast opening and closing, comprising a housing 1, an mounting plate 11 fixedly connected inside the housing 1, a motor 2 fixedly connected to the mounting plate 11, a connecting shaft 21 fixedly connected to the output end of the motor 2, one end of the connecting shaft 21 being rotatably connected to the mounting plate 11, and the other end being rotatably connected to the housing 1, a plurality of cams 22 fixedly connected to the connecting shaft 21, an insulating rod 23 being slidably connected through the housing 1 at the position corresponding to the cams 22, a first mounting base 24 fixedly connected to the bottom end of the insulating rod 23, a roller 25 hinged to the first mounting base 24 and rollingly connected to the cams 22, and a first spring 26 sleeved on the insulating rod 23, and the first spring 26... One end is mounted on the housing 1, and the other end is mounted on the first mounting base 24. The mounting plate 11 is used to mount the motor 2, which provides basic driving force for the connecting shaft 21. The connecting shaft 21 is used to mount the cam 22, which pushes the roller 25. The roller 25 can convert the sliding friction between the cam 22 and the insulating rod 23 into rolling friction, thereby reducing resistance. The insulating rod 23 is mounted on the roller 25 through the first mounting base 24. The first spring 26 is used to provide thrust when the insulating rod 23 moves downward. A pole post 12 is fixedly connected to the housing 1 at the position corresponding to the insulating rod 23. The pole post 12 has a built-in contact mechanism that is linked with the insulating rod 23. The opening and closing of the contact mechanism is realized by the up and down movement of the insulating rod 23. The connecting shaft A second mounting base 27 is fixedly connected to the mounting plate 11. A permanent magnet 28 is fixedly connected to the second mounting base 27. Shock-absorbing components 3 are provided on both sides of the permanent magnet 28, and the shock-absorbing components 3 are mounted on the mounting plate 11. The second mounting base 27 is used to mount the permanent magnet 28, which can be attracted to the shock-absorbing components 3 to lock the state of the connecting shaft 21. The shock-absorbing components 3 include a base plate 31, a magnetic post 32, a second spring 33, a coil 34, a rubber pad 35, a sleeve 36, a limiting flange 37, and a sliding sleeve 38. The base plate 31 is fixedly connected to the mounting plate 11. A magnetic post 32 is fixedly connected to the base plate 31. A coil 34 is sleeved on the magnetic post 32. A sleeve 36 is sleeved on the coil 34. All sleeves 36 are fixedly connected to the base plate 31. A sliding sleeve 38 is slidably connected to the sleeve 36. A second spring 33 is sleeved on the sleeve 36, with one end of the second spring 33 set on the sliding sleeve 38 and the other end set on the base plate 31. The coil 34 is used to generate electromagnetic force on the magnetic post 32. The second spring 33 is used to provide power to the sliding sleeve 38. The sleeve 36 is used to install the sliding sleeve 38, and the sliding sleeve 38 is used to withstand the impact of the permanent magnet 28. A limiting flange 37 is fixedly connected to the sleeve 36, and the limiting flange 37 is sleeved inside the sliding sleeve 38. The limiting flange 37 is used to limit the sliding sleeve 38. A rubber pad 35 is fixedly connected to the top of the magnetic post 32. The rubber pad 35 is used to withstand the impact of the permanent magnet 28 and realize buffering and shock absorption.

[0017] Working Principle: When using this invention, if a tripping operation is required, the connecting shaft 21 can be rotated 90 degrees by the motor 2. The cam 22 on the connecting shaft 21 and the second mounting base 27 rotate accordingly, and the permanent magnet 28 on the second mounting base 27 also moves accordingly. Under the action of the first spring 26, the insulating rod 23 moves down to the tripping position, and the roller 25 on the first mounting base 24 rolls on the cam 22. At the same time as the motor 2 starts, the coils 34 on both shock-absorbing components 3 are energized, generating an electromagnetic repulsion force on the magnetic column 32 where the permanent magnet 28 is attracted, causing the permanent magnet 28 to detach. A short-term electromagnetic repulsion force is generated on the other magnetic column 32 targeting the permanent magnet 28, decelerating the approaching permanent magnet 28. Then, both coils 34 are de-energized, and the permanent magnet 28 is attracted to the magnetic column 32 under the action of magnetic force. During this process, the permanent magnet 28 is in the stage of detaching from the magnetic column 32. The connecting shaft 21 rotates faster due to the electromagnetic repulsion of the magnetic post 32 and the thrust of the second spring 33, which in turn causes the insulating rod 23 to move down faster. When the permanent magnet 28 approaches another magnetic post 32, it is subjected to the electromagnetic repulsion of the magnetic post 32 and the resistance of the second spring 33, which can prevent high-speed impact on the rubber pad 35. The mounting plate 11 inside the housing 1 is used to install the base plate 31, the motor 2 and the connecting shaft 21. The base plate 31 is used to install the sleeve 36 and the magnetic post 32, and also to limit the second spring 33. The second spring 33 is used to provide power to the sliding sleeve 38. The sleeve 36 is used to install the sliding sleeve 38 and limits the sliding sleeve 38 through the limiting flange 37. The sliding sleeve 38 and the rubber pad 35 are used to withstand the impact of the permanent magnet 28 and achieve buffering and shock absorption. The internal structure of the pole post 12 and the linkage method of the insulating rod 23 are fully described in the existing patents, so they will not be described again.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pole-mounted circuit breaker with fast opening and closing, comprising a housing (1), characterized in that: An installation plate (11) is fixedly connected inside the housing (1). A motor (2) is fixedly connected to the installation plate (11). A connecting shaft (21) is fixedly connected to the output end of the motor (2). One end of the connecting shaft (21) is rotatably connected to the installation plate (11), and the other end is rotatably connected to the housing (1). Multiple cams (22) are fixedly connected to the connecting shaft (21). An insulating rod (23) is slidably connected through the housing (1) at the position corresponding to the cam (22). A first mounting seat (24) is fixedly connected to the bottom end of the insulating rod (23). A roller (25) is hinged on the first mounting seat (24), and the roller (25) is slidably connected to the cam (22). A first spring (26) is sleeved on the insulating rod (23), and one end of the first spring (26) is set on the housing (1), and the other end is set on the first mounting seat (24).

2. A pole-mounted circuit breaker with fast opening and closing as described in claim 1, characterized in that: A pole post (12) is fixedly connected to the housing (1) at the position corresponding to the insulating rod (23).

3. A pole-mounted circuit breaker with fast opening and closing as described in claim 1, characterized in that: A second mounting base (27) is fixedly connected to the connecting shaft (21), and a permanent magnet (28) is fixedly connected to the second mounting base (27). Both sides of the permanent magnet (28) are provided with shock-absorbing components (3), and the shock-absorbing components (3) are provided on the mounting plate (11).

4. A pole-mounted circuit breaker with fast opening and closing according to claim 3, characterized in that: The shock absorption assembly (3) includes a base plate (31), a magnetic column (32), a second spring (33), a coil (34), a rubber pad (35), a sleeve (36), a limiting flange (37), and a sliding sleeve (38). The base plate (31) is fixedly connected to the mounting plate (11). The magnetic column (32) is fixedly connected to the base plate (31). The coil (34) is sleeved on the magnetic column (32). The sleeve (36) is sleeved on the coil (34). The coil (34) and the sleeve (36) are both fixedly connected to the base plate (31). The sliding sleeve (38) is slidably connected to the sleeve (36). The second spring (33) is sleeved on the sleeve (36). One end of the second spring (33) is set on the sliding sleeve (38), and the other end is set on the base plate (31).

5. A pole-mounted circuit breaker with fast opening and closing according to claim 4, characterized in that: A limiting flange (37) is fixedly connected to the sleeve (36), and the limiting flange (37) is sleeved inside the sliding sleeve (38).

6. A pole-mounted circuit breaker with fast opening and closing according to claim 4, characterized in that: A rubber pad (35) is fixedly connected to the top of the magnetic column (32).

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