Intelligent circuit breaker
The movable arc-extinguishing grid structure of the intelligent circuit breaker solves the problem of unsatisfactory arc-extinguishing grid spacing, achieves more efficient arc separation and heat dissipation, and improves the arc-extinguishing performance of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG SUGAO ELECTRIC CO LTD
- Filing Date
- 2026-03-17
- Publication Date
- 2026-05-12
AI Technical Summary
The existing circuit breaker arc-extinguishing grid spacing is not ideal, which leads to difficulties in heat dissipation and exhaust, affecting the arc-extinguishing effect.
Design an intelligent circuit breaker that adopts a movable transverse and longitudinal sliding plate structure. The arc-extinguishing grid plates are automatically adjusted in spacing during the opening and closing stages by controlling the operation handle. The transverse sliding plate quickly divides the arc before it is generated, and the longitudinal sliding plate actively moves closer to the stationary contact to lengthen the arc at the moment it is generated, thereby improving the arc extinguishing effect.
It improves the arc extinguishing effect, reduces arc dwell time and contact erosion, and enhances the arc separation capability of the circuit breaker.
Smart Images
Figure CN122025484A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an intelligent circuit breaker, belonging to the technical field of circuit breakers. Background Technology
[0002] A circuit breaker is a critical electrical protection device, primarily used to automatically disconnect circuits to protect electrical systems and equipment from faults. Its core function is to act quickly upon detecting abnormal current (such as overload or short circuit), isolate the faulty section, ensure the safe and stable operation of the power grid, and prevent secondary disasters such as fires.
[0003] Circuit breakers are mainly classified into several types, including air circuit breakers, vacuum circuit breakers, and SF6 circuit breakers. Currently, the arc extinguishing principle of air circuit breakers is to use air as the arc extinguishing medium and to quickly elongate, cool, and divide the arc through arc extinguishing grids, so that it is eventually extinguished. The arc extinguishing effect of the circuit breaker is related to the spacing between the arc extinguishing grids. When the spacing between the arc extinguishing grids is smaller, the arc voltage can be increased more quickly, thereby forcing the current to cross zero and extinguish. However, a small spacing between the arc extinguishing grids can also lead to difficulties in heat dissipation and exhaust. Dense grids can act like a wall, hindering the flow of high-temperature ionized gas and creating a counter-effect for arc extinguishing. Therefore, people are often troubled by setting a reasonable spacing between the arc extinguishing grids. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide an intelligent circuit breaker that improves the problem of the non-ideal setting of the arc-extinguishing grid interval in the existing circuit breaker.
[0005] The technical problem to be solved by this invention is achieved by the following technical solution: A smart circuit breaker includes a housing, and a [missing information - likely a device or component] is disposed within the housing. Contact mechanism, including moving contact and stationary contact; The operating mechanism includes an operating handle and a transmission assembly. The operating handle is rotatably connected to the housing. The transmission assembly is driven to both the operating handle and the moving contact. The operating handle can drive the moving contact to contact the stationary contact through the transmission assembly. An arc-extinguishing mechanism includes an arc-extinguishing bracket and an arc-extinguishing grid plate. The arc-extinguishing grid plate has multiple plates and is spaced apart on the arc-extinguishing bracket along the width direction of the arc-extinguishing bracket. The arc-extinguishing grid plate includes multiple transverse sliding plates, which are slidably disposed within the arc-extinguishing bracket along the arrangement direction. The arc extinguishing mechanism further includes a driving component and a linkage assembly. The driving component is slidably disposed on the arc extinguishing bracket. The driving component can drive all the transverse sliding plates to slide, and the interval between adjacent transverse sliding plates increases. The linkage assembly is linked to the operating handle and the driving component respectively. The operating handle drives the driving component to slide through the linkage assembly.
[0006] By adopting the above technical solution, the arc-extinguishing grid has some transverse sliding plates whose spacing can be changed, and the transverse sliding plates can be driven to slide by the operating handle. The operating handle controls the opening and closing of the circuit breaker. Therefore, the spacing of some arc-extinguishing grid plates can be automatically changed during the opening and closing stages, thereby making corresponding adjustments. Compared with the current fixed spacing mode of arc-extinguishing grid plates, the spacing of the transverse sliding plates is more reasonable.
[0007] The present invention is further configured such that: the operating handle has a closed position and an open position; when the operating handle is rotated to the closed position, the spacing between the transverse sliding plates remains unchanged; when the operating handle is rotated to the open position, the spacing between adjacent transverse sliding plates increases.
[0008] By adopting the above technical solution, the response timing of the separation of the moving contact and the stationary contact is before the response timing of the movement of the transverse plate. When the moving contact and the stationary contact just separate, the transverse plate does not move. After a brief response, the transverse plate moves. Therefore, when the arc is first generated, the arc-extinguishing grid plates with a small spacing can quickly divide it into a large number of short arcs, causing the arc voltage to increase sharply. After the arc is successfully divided, the spacing of the transverse plates increases, providing a huge expansion and cooling space for the high-temperature plasma. The arc-extinguishing grid plates can adaptively adjust the spacing during the opening and closing stages in a movable manner, thereby improving the arc-extinguishing effect.
[0009] The present invention is further configured such that: the arc-extinguishing grid plate also includes a plurality of longitudinal sliding plates, the longitudinal sliding plates being slidably disposed on the arc-extinguishing bracket along their own length direction; the driving member is capable of driving all the longitudinal sliding plates to move toward the stationary contact.
[0010] By adopting the above technical solution, during the opening phase, the arc-extinguishing grid in the fixed state passively waits for the arc to be attracted, while the longitudinally moving plate actively approaches the stationary contact at the moment the arc is generated, which can lengthen the arc, greatly shorten the arc dwell time, reduce the problem of contact erosion, and improve the arc extinguishing effect.
[0011] The present invention is further configured such that: both sides of the arc extinguishing bracket are provided with transverse and longitudinal movement holes, both ends of the transverse movement plate are provided with transverse movement blocks, the transverse movement blocks are slidably disposed in the corresponding transverse movement holes, and both ends of the longitudinal movement plate are provided with longitudinal movement blocks, the longitudinal movement blocks are slidably disposed in the corresponding longitudinal movement holes.
[0012] By adopting the above technical solution, the transverse and longitudinal holes provide guide space for the transverse and longitudinal plates to slide in their respective directions.
[0013] The present invention is further configured such that: the driving member is slidably disposed along the length direction of the longitudinal moving piece; the driving member has a driving longitudinal hole; the longitudinal moving block is inserted and positioned in the corresponding driving longitudinal hole; the driving member has a driving transverse hole; the transverse moving block is movably disposed in the corresponding driving transverse hole; the driving transverse hole has a first inclined sidewall and a second inclined sidewall respectively; when the driving member slides, the first inclined sidewall can abut against the transverse moving block and drive the transverse moving block to slide; when the driving member resets, the second inclined sidewall can abut against the transverse moving block and drive the transverse moving block to reset.
[0014] By adopting the above technical solution, the driving component drives the longitudinal moving plates to move synchronously in the same direction, while the transverse moving plates move in different directions by generating component forces with the inclined surface of the driving component. The moving time of different transverse moving plates is different, and the moving distance of different transverse moving plates gradually increases.
[0015] The present invention is further configured such that: the linkage component includes a drive gear and a drive lever; the drive gear is rotatably connected to the housing coaxially with the operating handle; the operating handle has teeth that mesh with the drive gear; the drive gear has a drive part and a reset part at its eccentric position; one end of the drive lever is movably limited between the drive part and the reset part; the drive lever is rotatably connected to the housing coaxially with the operating handle; the drive member has two limiting parts spaced apart along the length direction of the transverse piece; the other end of the drive lever is movably limited between the two limiting parts; when one end of the lever abuts against the drive part, the other end of the lever abuts against the corresponding limiting part and drives the drive member to slide; when one end of the lever abuts against the reset part, the other end of the lever abuts against the other limiting part and drives the drive member to reset.
[0016] By adopting the above technical solution and using the lever principle, the rotating operating handle can drive the linearly sliding drive component to move.
[0017] The present invention is further configured such that: the driving component has a plurality of heat dissipation holes on its side wall.
[0018] By adopting the above technical solution, the heat dissipation holes play a role in heat dissipation.
[0019] The present invention is further configured such that: a plurality of heat dissipation grooves corresponding to the transverse moving holes are formed on the outer side wall of the driving member, one side of the heat dissipation groove is connected to the transverse moving holes and the other side extends to the end of the driving member.
[0020] By adopting the above technical solution, the heat dissipation tank plays a role in heat dissipation.
[0021] The beneficial effects of this invention are: The arc-extinguishing grid has some transverse sliding plates whose spacing can be changed. These transverse sliding plates can be driven to slide by an operating handle, which controls the opening and closing of the circuit breaker. Therefore, the spacing of some arc-extinguishing grid plates can be automatically changed during the opening and closing phases, thus making corresponding adjustments. Compared with the current fixed spacing mode of arc-extinguishing grid plates, the spacing of the transverse sliding plates is more reasonable. The response timing of the separation of the moving contact and the stationary contact precedes the response timing of the movement of the transverse plate. When the moving contact and the stationary contact just separate, the transverse plate does not move. After a brief response, the transverse plate moves. Therefore, when the arc is first generated, the small-pitched arc-extinguishing grid plates can quickly divide it into a large number of short arcs, causing the arc voltage to increase sharply. After the arc is successfully divided, the spacing of the transverse plates increases, providing a huge expansion and cooling space for the high-temperature plasma. The arc-extinguishing grid plates can adaptively adjust the spacing during the opening and closing stages in a movable manner, thereby improving the arc-extinguishing effect. During the opening phase, the fixed arc-extinguishing grid passively waits for the arc to be attracted, while the longitudinally moving plate actively approaches the stationary contact at the moment the arc is generated, which can lengthen the arc, greatly shorten the arc dwell time, reduce the problem of contact erosion, and improve the arc extinguishing effect. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.
[0023] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application.
[0024] Figure 3 This is a partial structural diagram of an embodiment of this application, used to illustrate the linkage components and the arc extinguishing mechanism.
[0025] Figure 4 This is a schematic diagram of the arc-extinguishing bracket according to an embodiment of this application.
[0026] Figure 5 This is a schematic diagram of the structure of the driver component according to an embodiment of this application.
[0027] In the figure: 100, housing; 20, moving contact; 21, stationary contact; 30, operating handle; 31, transmission assembly; 401, transverse movement hole; 402, longitudinal movement hole; 403, driving longitudinal hole; 404, driving transverse hole; 405, first inclined sidewall; 406, second inclined sidewall; 40, arc extinguishing bracket; 41, arc extinguishing grid plate; 42, driving component; 50, electromagnetic tripping assembly; 51, thermal tripping assembly; 60, driving gear; 61, driving lever; 62, driving part; 63, reset part; 70, limiting part; 801, heat dissipation hole; 802, heat dissipation groove. Detailed Implementation
[0028] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific figures 1-5.
[0029] This application provides an intelligent circuit breaker, including a housing 100. The housing 100 houses a contact mechanism, an operating mechanism, an arc-extinguishing mechanism, and a tripping mechanism. The contact mechanism includes a moving contact 20 and a stationary contact 21, with the moving contact 20 being movably disposed. The operating mechanism includes an operating handle 30 and a transmission assembly 31. The operating handle 30 is rotatably connected to the housing 100, and the transmission assembly 31 is drively connected to both the operating handle 30 and the moving contact 20. The operating handle 30 can drive the moving contact 20 to contact the stationary contact 21 via the transmission assembly 31. The arc-extinguishing mechanism includes an arc-extinguishing bracket 40 and arc-extinguishing grid plates 41. The arc-extinguishing bracket 40 is snapped and fixed to the housing 100, and multiple arc-extinguishing grid plates 41 are spaced apart along the width direction of the arc-extinguishing bracket 40. The tripping mechanism includes an electromagnetic tripping assembly 50 and a thermal tripping assembly 51.
[0030] The arc-extinguishing grid plate 41 includes multiple transverse sliding plates, which are slidably disposed within the arc-extinguishing bracket 40 along the arrangement direction. The arc-extinguishing mechanism also includes a drive component 42 and a linkage assembly. The drive component 42 is slidably disposed on the arc-extinguishing bracket 40 and can drive all the transverse sliding plates to slide. The sliding distance of each transverse sliding plate gradually increases, thereby increasing the interval between adjacent transverse sliding plates. The linkage assembly is linked to the operating handle 30 and the drive component 42 respectively. The operating handle 30 drives the drive component 42 to slide through the linkage assembly. The operating handle 30 has a closed position and an open position. When the operating handle 30 is rotated to the closed position, the interval between the transverse sliding plates remains unchanged. When the operating handle 30 is rotated to the open position, the interval between adjacent transverse sliding plates increases. The response timing of the separation of the moving contact 20 and the stationary contact 21 precedes the response timing of the movement of the transverse sliding plates.
[0031] The arc-extinguishing grid plate 41 also includes multiple longitudinal sliding plates (the transverse sliding plates are structurally identical to the longitudinal sliding plates, the difference being that they move in different directions). The longitudinal sliding plates are slidably mounted on the arc-extinguishing bracket 40 along their own length. The driving component 42 can drive all the longitudinal sliding plates to move towards the stationary contact 21, and the movement process is synchronized. When the operating handle 30 is rotated to the closed position, the spacing between the longitudinal sliding plates remains unchanged. When the operating handle 30 is rotated to the open position, the longitudinal sliding plates move closer to the stationary contact 21. The response time of the longitudinal sliding plate movement is before the moving contact 20 separates from the stationary contact 21, or the response time of the longitudinal sliding plate movement is after the moving contact 20 separates from the stationary contact 21 and before the transverse sliding plate movement response.
[0032] Specifically, the arc-extinguishing bracket 40 has transverse movement holes 401 and longitudinal movement holes 402 on both sides. Transverse movement blocks are provided at both ends of the transverse movement plate, and these blocks are slidably disposed within the corresponding transverse movement holes 401. Similarly, longitudinal movement blocks are provided at both ends of the longitudinal movement plate, and these blocks are slidably disposed within the corresponding longitudinal movement holes 402. The driving component 42 includes a seat, which is slidably fitted onto the outer wall of the driving component 42 along the length of the arc-extinguishing grid plate 41, allowing the driving component 42 to slide along the length of the longitudinal movement plate. The arc-extinguishing bracket 40 also has a guide seat, on which the driving component 42 is slidably positioned for guidance. The driving component 42 has a driving longitudinal hole 403. The driving component 42 and the seat extend towards the stationary contact 21 to form an extension portion. The driving longitudinal hole 403 is located on the extension portion, and the longitudinal movement blocks are inserted and positioned at the corresponding longitudinal contact 21. The drive member 42 is provided with a drive transverse hole 404 on the extension. The transverse block is movably disposed in the corresponding drive transverse hole 404. The drive transverse hole 404 has a first inclined sidewall 405 and a second inclined sidewall 406 respectively. When the drive member 42 slides, the first inclined sidewall 405 can abut against the transverse block and drive the transverse block to slide. When the drive member 42 resets, the second inclined sidewall 406 can abut against the transverse block and drive the transverse block to reset.
[0033] The linkage assembly includes a drive gear 60 and a drive lever 61. The drive gear 60 is coaxially rotatably connected to the operating handle 30 on the housing 100. The operating handle 30 has teeth that mesh with the drive gear 60. A drive part 62 and a reset part 63 are provided at the eccentric part of the drive gear 60. One end of the drive lever 61 is movably limited between the drive part 62 and the reset part 63. The drive lever 61 is coaxially rotatably connected to the operating handle 30 on the housing 100. The drive member 42 has two limiting parts 70 spaced apart along the length direction of the transverse sliding piece. The other end of the drive lever 61 is movably limited between the two limiting parts 70. When one end of the lever abuts against the drive part 62, the other end of the lever abuts against the corresponding limiting part 70 and drives the drive member 42 to slide. When one end of the lever abuts against the reset part 63, the other end of the lever abuts against the other limiting part 70 and drives the drive member 42 to reset. The linkage assembly is staggered from the contact mechanism and the tripping mechanism.
[0034] The driving component 42 has multiple heat dissipation holes 801 on its side wall. The outer side wall of the driving component 42 has multiple heat dissipation grooves 802 corresponding to the transverse moving holes 401. One side of the heat dissipation groove 802 is connected to the transverse moving hole 401, and the other side extends to the end of the driving component 42.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. An intelligent circuit breaker, characterized in that: Includes a housing (100), wherein the housing (100) is provided with The contact mechanism includes a moving contact (20) and a stationary contact (21); The operating mechanism includes an operating handle (30) and a transmission assembly (31). The operating handle (30) is rotatably connected to the housing (100). The transmission assembly (31) is connected to the operating handle (30) and the moving contact (20) respectively. The operating handle (30) can drive the moving contact (20) to contact the stationary contact (21) through the transmission assembly (31). The arc extinguishing mechanism includes an arc extinguishing bracket (40) and an arc extinguishing grid plate (41). The arc extinguishing grid plate (41) has multiple plates and is arranged at intervals on the arc extinguishing bracket (40) along the width direction of the arc extinguishing bracket (40). The arc extinguishing grid plate (41) includes multiple transverse plates, which are slidably disposed in the arc extinguishing bracket (40) along the arrangement direction. The arc extinguishing mechanism further includes a driving component (42) and a linkage component. The driving component (42) is slidably disposed on the arc extinguishing bracket (40). The driving component (42) can drive all the transverse sliding plates to slide, and the interval between adjacent transverse sliding plates increases. The linkage component is linked to the operating handle (30) and the driving component (42) respectively. The operating handle (30) drives the driving component (42) to slide through the linkage component.
2. The intelligent circuit breaker according to claim 1, characterized in that: The operating handle (30) has a closed position and an open position. When the operating handle (30) is rotated to the closed position, the spacing between the transverse plates remains unchanged. When the operating handle (30) is rotated to the open position, the spacing between adjacent transverse plates increases.
3. The intelligent circuit breaker according to claim 2, characterized in that: The arc-extinguishing grid plate (41) also includes a plurality of longitudinal sliding plates, which are slidably disposed on the arc-extinguishing bracket (40) along their own length direction; the driving member (42) can drive all the longitudinal sliding plates to move toward the stationary contact (21).
4. The intelligent circuit breaker according to claim 3, characterized in that: The arc-extinguishing bracket (40) has a transverse movement hole (401) and a longitudinal movement hole (402) on both sides. The transverse movement plate has transverse movement blocks at both ends, and the transverse movement blocks are slidably disposed in the corresponding transverse movement hole (401). The longitudinal movement plate has longitudinal movement blocks at both ends, and the longitudinal movement blocks are slidably disposed in the corresponding longitudinal movement hole (402).
5. The intelligent circuit breaker according to claim 4, characterized in that: The driving member (42) is slidably disposed along the length direction of the longitudinal sliding piece. The driving member (42) has a driving longitudinal hole (403), and the longitudinal sliding block is inserted and positioned in the corresponding driving longitudinal hole (403). The driving member (42) has a driving transverse hole (404), and the transverse sliding block is movably disposed in the corresponding driving transverse hole (404). The driving transverse hole (404) has a first inclined sidewall (405) and a second inclined sidewall (406) respectively. When the driving member (42) slides, the first inclined sidewall (405) can abut against the transverse sliding block and drive the transverse sliding block to slide. When the driving member (42) resets, the second inclined sidewall (406) can abut against the transverse sliding block and drive the transverse sliding block to reset.
6. The intelligent circuit breaker according to claim 5, characterized in that: The linkage assembly includes a drive gear (60) and a drive lever (61). The drive gear (60) is coaxially rotatably connected to the housing (100) with the operating handle (30). The operating handle (30) has teeth that mesh with the drive gear (60). The drive gear (60) has a drive part (62) and a reset part (63) at its eccentric position. One end of the drive lever (61) is movably limited between the drive part (62) and the reset part (63). The drive lever (61) and the operating handle (30) rotate coaxially. The drive member (42) is movably connected to the housing (100). Two limiting parts (70) are provided at intervals along the length direction of the transverse piece. The other end of the drive lever (61) is movably limited between the two limiting parts (70). When one end of the lever abuts against the drive part (62), the other end of the lever abuts against the corresponding limiting part (70) and drives the drive member (42) to slide. When one end of the lever abuts against the reset part (63), the other end of the lever abuts against the other limiting part (70) and drives the drive member (42) to reset.
7. The intelligent circuit breaker according to claim 1, characterized in that: The drive component (42) has multiple heat dissipation holes (801) on its side wall.
8. The intelligent circuit breaker according to claim 4, characterized in that: The outer side wall of the drive member (42) is provided with a plurality of heat dissipation grooves (802) corresponding to the transverse hole (401). One side of the heat dissipation groove (802) is connected to the transverse hole (401), and the other side extends to the end of the drive member (42).