Single-phase circuit breaker electromagnetic spring operating mechanism
By introducing a tripping energy storage device and a magnetic tripping starter into the circuit breaker, combined with a spring mechanism, the reliability problem caused by capacitor instability in existing circuit breakers is solved, and more stable closing and opening operations are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI KAIYUESHENG ELECTRICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-23
AI Technical Summary
The closing and opening of existing circuit breakers are achieved by the repulsive force generated by eddy currents, which requires a large capacitor. However, when the capacitor capacity is large, it is unstable and easily affected by temperature and environmental changes, resulting in poor reliability.
The tripping energy storage device provides the main tripping force, the magnetic tripping starter is used to start the tripping, and the closing energy storage device and the magnetic closing starter work together to achieve closing and opening through a spring mechanism, reducing the dependence on capacitors.
This improves the operational stability and reliability of the circuit breaker, reduces its reliance on capacitors, avoids closing and opening failures caused by capacitor instability, and enhances overall reliability.
Smart Images
Figure CN224400336U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a circuit breaker, and more particularly to an electromagnetic spring operating mechanism for a single-phase circuit breaker. Background Technology
[0002] Existing circuit breakers such as Figure 3 As shown, since both closing and opening are achieved through the repulsive force generated by eddy currents, this method requires a large force from the eddy current repulsion mechanism. Therefore, a capacitor is needed to increase the power. However, when the capacitor capacity is large, it is unstable. The output of the capacitor changes with temperature and environment, which can easily cause problems such as failure to close or open the circuit, resulting in poor reliability. Utility Model Content
[0003] To solve the above problems, this utility model provides an electromagnetic spring operating mechanism for a single-phase circuit breaker, the specific technical solution of which is as follows:
[0004] An electromagnetic spring operating mechanism for a single-phase circuit breaker includes: a tripping energy storage device connected to an insulating pull rod for driving the insulating pull rod to trip; a linkage device connected to the tripping energy storage device; a magnetic tripping start device connected to the linkage device for initiating tripping; a closing energy storage device connected to the linkage device; an energy storage drive device connected to the closing energy storage device for driving the insulating pull rod to close via the closing energy storage device and the linkage device; and a magnetic closing start device connected to the closing energy storage device for initiating closing.
[0005] Preferably, the tripping energy storage device includes: a tripping crank arm, rotatably mounted on the circuit breaker, with its other end rotatably connected to the insulating pull rod; and a tripping spring, mounted on the circuit breaker and connected to the other end of the tripping crank arm.
[0006] Preferably, the linkage device includes: a first linkage plate, one end of which is rotatably connected to the insulating pull rod; a linkage crank arm, rotatably mounted on the circuit breaker and rotatably connected to the first linkage plate and the closing energy storage device respectively; and a second linkage plate, which is rotatably connected to the linkage crank arm and the magnetic tripping start device respectively.
[0007] Preferably, the magnetic tripping start device includes: a magnetic frame, mounted on the circuit breaker, including magnetic supports and coil supports at both ends; a holding magnet, mounted on the magnetic support; a tripping coil, mounted on the coil support; a transmission link, movably inserted into the magnetic frame; and a magnetic disk, mounted on the transmission link and located between the holding magnet and the tripping coil; wherein, when closing, the magnetic disk is attracted to the holding magnet, and when tripping, the tripping coil attracts the magnetic disk to drive the transmission link to pull the insulating rod to trip.
[0008] Preferably, the energy storage closing device includes: a closing shaft rotatably mounted on the circuit breaker; a cam mounted on the closing shaft; a closing wheel mounted on the linkage device and opposite to the cam; a closing drive arm mounted on the closing shaft; and a closing spring mounted on the circuit breaker and connected to the closing drive arm; wherein, during closing, the closing spring drives the cam to drive the closing wheel through the closing drive arm, thereby causing the linkage device to drive the insulating pull rod to close the circuit.
[0009] Furthermore, the energy storage drive device includes: a power storage motor mounted on the circuit breaker; a drive gear mounted on the power storage motor; a large gear mounted on the closing shaft; and a reduction gear set connected to the drive gear and the large gear respectively.
[0010] Furthermore, the reduction gear set includes: a shaft gear, rotatably mounted on the circuit breaker and meshing with the large gear; a one-way bearing, mounted on the shaft gear; and a small gear, mounted on the one-way bearing and meshing with the driving gear.
[0011] Furthermore, the magnetic closing start device includes: a closing electromagnet mounted on the circuit breaker; a closing start shaft rotatably mounted on the circuit breaker; a closing start crank arm mounted on the closing start shaft; a closing push rod mounted on the closing start shaft and positioned opposite to the closing electromagnet; a return spring mounted on the circuit breaker and connected to the closing start crank arm; and a positioning wheel mounted on the cam and abutting against the end of the closing start crank arm when the circuit is open.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The single-phase circuit breaker electromagnetic spring operating mechanism provided by this utility model provides the main opening force through a tripping energy storage device, while a magnetic tripping starting device is used to start the tripping, which has high reliability and stable operation. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the application in the open state;
[0015] Figure 2 This is a schematic diagram of the application in the closed state;
[0016] Figure 3 This is a schematic diagram of the structure of an existing circuit breaker. Detailed Implementation
[0017] The present invention will now be further described with reference to the accompanying drawings.
[0018] like Figure 1 and Figure 2As shown, an electromagnetic spring operating mechanism for a single-phase circuit breaker includes an energy storage tripping device 2, a linkage device 3, a magnetic tripping start device 4, a closing energy storage device 5, an energy storage drive device 6, and a magnetic closing start device 7. The tripping energy storage device 2 is connected to the insulating pull rod 1 and is used to drive the insulating pull rod 1 to trip. The linkage device 3 is connected to the tripping energy storage device 2. The magnetic tripping start device 4 is connected to the linkage device 3 and is used to start tripping. The closing energy storage device 5 is connected to the linkage device 3. The energy storage drive device 6 is connected to the closing energy storage device 5 and is used to drive the insulating pull rod 1 to close through the closing energy storage device 5 and the linkage device 3. The magnetic closing start device 7 is connected to the closing energy storage device 5 and is used to start closing.
[0019] The tripping energy storage device 2 provides power for tripping, ensuring tripping force and stable operation.
[0020] The magnetic tripping start device 4 includes a magnetic frame, a holding magnet 43, a transmission link 45, and a tripping coil 44. The magnetic frame is fixed inside the circuit breaker and includes a magnetic support 41 and a coil support 42 at both ends. The magnetic support 41 and the coil support 42 are fixedly connected by a fixing rod. Both the magnetic support 41 and the coil support 42 have through holes at their centers. The holding magnet 43 is mounted on the magnetic support 41 and is an annular holding magnet 43, which is coaxial with the through hole. The transmission link 45 is movably inserted into the through holes of the magnetic support 41 and the coil support 42, and can reciprocate along the axis. The transmission link 45 is fixedly connected to the circular magnetic disk 46, which is located between the holding magnet 43 and the trip coil 44. When the magnetic disk 46 is pressed against the holding magnet 43, the transmission link 45 can be kept in the closed state by magnetic force. When the trip coil 44 is energized, the magnetic disk 46 can be attracted downward by electromagnetic force, thereby driving the transmission link 45 to pull the insulating rod 1 to trip.
[0021] The linkage device 3 includes a first linkage plate 31, a linkage crank arm 33, and a second linkage plate 32. The first linkage plate 31 and the second linkage plate 32 are rotatably mounted at both ends of the linkage crank arm 33. The linkage crank arm 33 is T-shaped. The middle position of the top of the linkage crank arm 33 is rotatably mounted on the circuit breaker through the linkage shaft 34. The first linkage plate 31 is located at one end of the top of the linkage crank arm 33 and is rotatably connected to the insulating pull rod 1. The second linkage plate 32 is located at the bottom of the linkage crank arm 33 and is rotatably connected to the end of the transmission connecting rod 45.
[0022] The tripping energy storage device 2 includes a tripping crank arm 21 and a tripping spring 22. The middle part of the tripping crank arm 21 is rotatably mounted on the circuit breaker via a first rotating shaft 23. One end of the tripping crank arm 21 is connected to the tripping spring 22, and the other end is rotatably connected to the insulating pull rod 1. The end of the tripping spring 22 is mounted on the circuit breaker. The tripping spring 22 drives the insulating pull rod 1 to trip via the tripping crank arm 21. The tripping spring 22 provides the main power for tripping, ensuring reliable tripping and preventing tripping failure.
[0023] The closing energy storage device 5 includes a closing shaft 51, a cam 52, a closing wheel 53, a closing drive arm 54, and a closing spring 55. The closing shaft 51 is rotatably mounted on the circuit breaker and connected to the cam 52. The cam 52 is positioned opposite to the closing wheel 53. The closing wheel 53 is mounted on the other end of the top of the linkage crank arm 33. The closing wheel 53 and the first linkage plate 31 are located on opposite sides of the linkage shaft 34. One end of the closing drive arm 54 is connected to the closing shaft 51, and the other end is connected to one end of the closing spring 55. The other end of the closing spring 55 is fixed to the circuit breaker. When closing, the closing spring 55 drives the cam 52 through the closing drive arm 54 to drive the closing wheel 53, thereby causing the linkage device 3 to drive the insulating pull rod 1 to close. The closing shaft 51 is a splined shaft.
[0024] The energy storage drive device 6 includes a power storage motor 66, a drive gear 65, a large gear 61, and a reduction gear set. The power storage motor 66 is fixed to the circuit breaker and located below the cam 52, and is also connected to the drive gear 65. The drive gear 65 is connected to the large gear 61 through the reduction gear set. The large gear 61 is fixed to the closing shaft 51. The reduction gear set includes a shaft gear 62, a one-way bearing 63, and a pinion 64. The shaft gear 62 is rotatably mounted on the circuit breaker and meshes with the large gear 61. The pinion 64 is fixed to the shaft gear 62 through the one-way bearing 63 and meshes with the drive gear 65. The reduction gear set is used to reduce speed and increase the torque output of the power storage motor 66, making it easier to rotate the cam 52.
[0025] The magnetic closing start device 7 includes a closing electromagnet 75, a closing start shaft 71, a closing start crank arm 72, a closing push rod 74, a return spring 73, and a positioning wheel 76. The closing electromagnet 75 is fixed to the circuit breaker and located on one side of the cam 52. The closing start shaft 71 is rotatably mounted on the circuit breaker and is fixedly connected to the closing start crank arm 72 and the closing push rod 74. The closing start shaft 71, the closing start crank arm 72, and the closing push rod 74 form an integral structure. The closing push rod 74 is also positioned opposite to the closing electromagnet 75. One end of the return spring 73 is fixed to the circuit breaker, and the other end of the return spring 73 is connected to one end of the closing start crank arm 72. The other end of the closing start crank arm 72 is positioned opposite to the positioning wheel 76. The positioning wheel 76 is fixed to the cam 52 and abuts against the end of the closing start crank arm 72 in the open state. In the free state, the closing electromagnet 75 abuts against the closing push rod 74.
[0026] Energy storage operation: When the circuit breaker is in the open, non-energy-storage state, the accumulator motor 66 is energized. The accumulator motor 66 drives the connected pinion 64 to rotate via the drive gear 65. The pinion 64 rotates with the shaft gear 62 during energy storage via the one-way bearing 63, and rotates freely during opening. The rotation of the pinion 64 simultaneously drives the shaft gear 62 to rotate. The shaft gear 62 simultaneously meshes with the large gear 61, which is connected to the cam 52 and the closing drive arm 54 via the closing shaft 51. The rotation of the shaft gear 62 drives the large gear 61 to rotate, and the rotation of the large gear 61 simultaneously drives the cam 52 and the closing drive arm 54 to rotate via the closing shaft 51. The closing drive arm 54 drives the closing spring 55 to extend and store energy. When the closing spring 55 is extended to the energy storage position, the closing start crank arm 72 is engaged with the positioning wheel 76. At this time, the accumulator motor 66 is de-energized, all gears stop rotating, and the closing spring 55 completes the energy storage operation.
[0027] Closing operation process: When closing, the closing electromagnet 75 is energized. The striking rod of the closing electromagnet 75 pushes the closing push rod 74 upward. The closing push rod 74 drives the closing start shaft 71 and the closing start crank arm 72 to rotate in the direction of the closing electromagnet 75, that is, to rotate counterclockwise along the closing start shaft 71, so that the closing start crank arm 72 separates from the positioning wheel 76. The closing spring 55 drives the cam 52 to rotate counterclockwise rapidly through the closing drive arm 54 and the closing shaft 51. The cam 52 drives the closing wheel 53 to rotate... The linkage crank arm 33 rotates clockwise, and the linkage crank arm 33 drives the insulating pull rod 1 to rise through the first linkage plate 31 to close the circuit. The linkage crank arm 33 drives the transmission connecting rod 45 to rise through the second linkage plate 32. The magnetic disk 46 abuts against the holding magnet 43 and is magnetically attracted to the magnetic support 41, so that the magnetic opening start device 4 remains in the closed state and avoids automatic opening. The insulating pull rod 1 drives the opening spring 22 to stretch through the opening crank arm 21, so that the opening spring 22 stores energy.
[0028] The tripping process is as follows: When the tripping coil 44 is energized, it generates an electromagnetic force that attracts the magnetic disk 46. Since the electromagnetic force is greater than the attraction of the holding magnet 43 to the magnetic disk 46, the magnetic disk 46 moves toward the tripping coil 44. The magnetic disk 46 drives the transmission link 45 to move downward. The transmission link 45 drives the linkage crank arm 33 to rotate counterclockwise. The linkage crank arm 33 drives the insulating pull rod 1 to trip through the first linkage plate 31. At the same time, the tripping spring 22 drives the tripping crank arm 21 to rotate clockwise. The tripping crank arm 21 drives the insulating pull rod 1 to trip, thus completing the tripping.
[0029] The opening and closing of the circuit breaker are mainly achieved by springs, which ensures both rapid action and high reliability.
[0030] Maintaining the closed state by keeping magnet 43 and magnetic disk 46 improves the stability of the closed state.
[0031] The magnetic tripping starter 4 requires less force and does not require a capacitor. Even if a capacitor is used, only a small capacity capacitor is needed, which can effectively improve the stability of the capacitor. Furthermore, since the tripping force is mainly provided by the tripping spring 22, it effectively avoids the situation where the magnetic tripping starter 4 cannot trip due to insufficient force, thus improving the reliability of tripping and reducing the performance requirements of the magnetic tripping starter 4.
[0032] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.
Claims
1. An electromagnetic spring operating mechanism for a single-phase circuit breaker, characterized in that, include: The tripping energy storage device (2) is connected to the insulating rod (1) and is used to drive the insulating rod (1) to trip; The linkage device (3) is connected to the circuit breaker energy storage device (2); A magnetic tripping start device (4) is connected to the linkage device (3) and is used to start tripping; The closing energy storage device (5) is connected to the linkage device (3); An energy storage drive device (6) is connected to the closing energy storage device (5) and is used to drive the insulating pull rod (1) to close the circuit through the closing energy storage device (5) and the linkage device (3); as well as The magnetic closing start device (7) is connected to the closing energy storage device (5) and is used to start the closing.
2. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 1, characterized in that, The circuit breaker energy storage device (2) includes: The tripping crank arm (21) is rotatably mounted on the circuit breaker, and its other end is rotatably connected to the insulating pull rod (1); and The tripping spring (22) is located on the circuit breaker and is connected to the other end of the tripping crank arm (21).
3. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 1, characterized in that, The linkage device (3) includes: The first linkage plate (31) is rotatably connected at one end to the insulating pull rod (1); A linkage crank arm (33) is rotatably mounted on the circuit breaker and is rotatably connected to the first linkage plate (31) and the closing energy storage device (5), respectively; and The second linkage plate (32) is rotatably connected to the linkage crank arm (33) and the magnetic tripping start device (4).
4. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 1, characterized in that, The magnetic tripping start device (4) includes: A magnetic support, installed on the circuit breaker, includes a magnetic support (41) and a coil support (42) at both ends. The magnet (43) is held in place on the magnetic support (41); The tripping coil (44) is mounted on the coil support (42); The transmission link (45) is movably inserted into the magnetic frame; and A magnetic disk (46) is disposed on the transmission link (45) and located between the holding magnet (43) and the trip coil (44); When the circuit is closed, the magnetic disk (46) is attracted to the holding magnet (43). When the circuit is opened, the opening coil (44) attracts the magnetic disk (46) to drive the transmission link (45) to pull the insulating rod (1) to open the circuit.
5. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 1, characterized in that, The closing energy storage device (5) includes: The closing shaft (51) is rotatably mounted on the circuit breaker; A cam (52) is mounted on the closing shaft (51); The closing wheel (53) is mounted on the linkage device (3) and is positioned opposite to the cam (52); A closing drive arm (54) is mounted on the closing shaft (51); and A closing spring (55) is provided on the circuit breaker and is connected to the closing drive arm (54); When the circuit is closed, the closing spring (55) drives the cam (52) through the closing drive arm (54) to drive the closing wheel (53) so that the linkage device (3) drives the insulating pull rod (1) to close the circuit.
6. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 5, characterized in that, The energy storage drive device (6) includes: A power storage motor (66) is installed on the circuit breaker; The drive gear (65) is mounted on the energy storage motor (66); A large gear (61) is disposed on the closing shaft (51); and The reduction gear set is connected to the drive gear (65) and the large gear (61) respectively.
7. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 6, characterized in that, The reduction gear set includes: A shaft gear (62) is rotatably mounted on the circuit breaker and meshes with the large gear (61); A one-way bearing (63) is provided on the shaft gear (62); and The pinion (64) is mounted on the one-way bearing (63) and meshes with the drive gear (65).
8. The electromagnetic spring operating mechanism for a single-phase circuit breaker according to claim 5, characterized in that, The magnetic closing and starting device (7) includes: A closing electromagnet (75) is installed on the circuit breaker; The closing start shaft (71) is rotatably mounted on the circuit breaker; The closing start crank arm (72) is located on the closing start shaft (71); The closing push rod (74) is located on the closing start shaft (71) and is positioned opposite to the closing electromagnet (75); A reset spring (73) is provided on the circuit breaker and connected to the closing start crank arm (72); and The positioning wheel (76) is located on the cam (52) and abuts against the end of the closing start crank arm (72) when the circuit is open.