Circuit breaker interlocking mechanism
By designing electromagnetically driven sliding adjusters in the circuit breaker, the three-phase circuit is individually closed and opened, which solves the problem of contact ablation of traditional circuit breakers in the three-phase circuit, and improves the service life of power equipment and Operational safety.
Patent Information
- Application Number
- CN202420081450.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-12
AI Technical Summary
Traditional circuit breakers are prone to ablation of contacts during the three-phase circuit opening and closing process, affecting the service life of power equipment, especially when current and voltage are not synchronized, it is difficult to achieve separate shut-off operation.
A circuit breaker chain mechanism is designed, including a fixing plate, signal assembly, drive assembly and open-opening chain assembly. The three-phase circuit is closed and opened-opening operation through electromagnetic parts and sliding adjustment parts to reduce contact ablation. Improve equipment life.
The electromagnetically driven sliding adjuster realizes accurate closing and opening of the three-phase circuit, which reduces the ablation of the contacts by the arc, improves the service life of the equipment, and simplifies the operation process.
Smart Images
Figure CN222146115U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker interlocking mechanism. Background Art
[0002] With the vigorous construction of the national power grid, higher requirements are put forward for the stability and safety of the power grid. With the continuous upgrading of the capacity of power equipment in distribution stations and the vigorous construction of automation, it is difficult for ordinary switchgear to achieve the expected performance goals. Circuit breakers are prone to high-frequency oscillation, which causes serious contact ablation, resulting in breaking failure and explosion of power equipment.
[0003] For special occasions, such as when switching capacitors and reactors to open and close three-phase circuits, the three-phase circuits need to be closed separately, while traditional circuit breakers close the three-phase circuits at the same time. In actual situations, there is a lack of synchronization between the current and voltage in the three-phase circuit. When one phase reaches the minimum current value, the other two phases may be at their peak values. At this time, when closing the circuit, the contacts of the circuit breaker are prone to ablation, which affects the service life of the power equipment. Therefore, this needs to be improved. Utility Model Content
[0004] In order to facilitate the separate closing and closing operations of a three-phase circuit, realize phase-by-phase circuit breaking, and increase the service life of power equipment, the present application provides a circuit breaker interlocking mechanism.
[0005] A circuit breaker interlocking mechanism provided in this application adopts the following technical solution:
[0006] A circuit breaker interlocking mechanism comprises a fixed plate arranged in a high-voltage cabinet, a position signal component arranged on the fixed plate, a drive component arranged on the fixed plate and a switch-off interlocking component arranged on the fixed plate, wherein the signal components are provided in three groups, the three groups of the signal components are arranged at intervals along the length direction of the fixed plate, and the three groups of the signal components correspond to the three-phase circuits one by one, the signal component comprises a travel switch circuit board connected to the three-phase circuit and a bracket arranged on the fixed plate, the drive component comprises a pressing plate slidably arranged on the fixed plate and an adjusting member for slidingly driving the pressing plate, the pressing plate is movably fitted and pressed against the travel switch circuit board, the adjusting member is electrically connected to the three-phase circuit, and when the current in the three-phase circuit is zero, the adjusting member drives the pressing plate to fit and press against the travel switch circuit board.
[0007] By adopting the above technical solution, when the three-phase circuit is closed, the travel switch circuit board is first electrically connected to the equipment end, and the adjusting component is electrically connected to the three-phase circuit. When closing is required, the three-phase circuit controls the adjusting component to drive the pressure plate to move downward, so that the pressure plate and the travel switch circuit board are tightly pressed against each other, thereby realizing the electrical connection between the three-phase circuit end and the equipment end, realizing the closing operation, reducing the contact erosion problem caused by closing when the current in the three-phase circuit has not returned to zero, thereby improving the service life of the equipment.
[0008] Optionally, the adjusting member includes an electromagnetic member disposed on a fixed plate, the electromagnetic member is electrically connected to the three-phase circuit, and when the electromagnetic member is energized, the electromagnetic member attracts the pressure plate to move in a direction close to the travel switch circuit board.
[0009] By adopting the above technical solution, when a closing operation is required, the electromagnetic component generates magnetism under the current fluctuation of the three-phase circuit, thereby attracting the pressure plate to move in the direction close to the travel switch circuit board, and then realizing the sliding control of the pressure plate, thereby realizing the separate closing operation of the three-phase circuit. Through the relationship between the electromagnetic component and the current, the inaccuracy of manual closing or unified closing is reduced, thereby reducing the ablation of the contacts by the current arc.
[0010] Optionally, a limiting hole is provided on the fixed plate, the limiting hole is consistent with the sliding direction of the pressure plate, a limiting rod is provided on the pressure plate, the limiting rod passes through the limiting hole and is slidably connected to the inner wall of the limiting hole, and a synchronization component for synchronously opening the three-phase circuit is also provided on the fixed plate.
[0011] By adopting the above technical scheme, when the pressure plate is slidably adjusted, under the action of the limit rod and the limit hole, the limit rod can only slide along the opening direction of the limit hole, so that the pressure plate can only slide along the opening direction of the limit hole, thereby limiting the sliding direction of the pressure plate, and the movement of the pressure plate is not easy to be inconvenient, thereby achieving stable fit between the pressure plate and the travel switch circuit board, and achieving stability when closing the switch; at the same time, when it is necessary to cut off the power between the equipment and the high-voltage cabinet, the three-phase circuit and the equipment are synchronously opened through the set synchronization parts, thereby simplifying the opening operation.
[0012] Optionally, the synchronizing member includes a driving plate slidably disposed on the fixed plate, the driving plate being provided with a receiving groove, the receiving groove being provided with a plurality of groups, the plurality of groups of receiving grooves corresponding one-to-one to the plurality of groups of limiting holes, the bottom side of the receiving groove being flush with the height of the bottom side of the limiting hole, the driving plate being movably fitted and pressed against the peripheral side of the limiting rod at the side of the limiting hole, and the driving plate being provided with an adjusting member for slidingly adjusting the driving plate.
[0013] By adopting the above technical scheme, first, when performing the closing operation, the technician first needs to slide the drive plate to the position corresponding to the accommodating groove and the limiting hole. At this time, since the bottom side heights of the accommodating groove and the limiting hole are flush, the accommodating groove has no effect on the sliding of the pressure plate, thereby not affecting the normal closing operation of the circuit breaker. When the opening operation is required, the technician slides the drive plate so that the side of the accommodating groove is pressed against the limiting rod, thereby causing the limiting rod to move away from the accommodating groove, thereby realizing the separation of the pressure plate and the travel switch circuit board, and realizing the opening operation of the equipment; at the same time, since the accommodating groove is provided with three groups corresponding to the three-phase circuit, when the drive plate slides, the three-phase circuit can be opened at the same time, thereby opening the three-phase circuit at the same time, and the operation is simple.
[0014] Optionally, the adjusting member includes a driving rod disposed on the driving plate, and the driving rod protrudes from the high-voltage cabinet.
[0015] By adopting the above technical solution, when opening the circuit breaker is required, the technician can slide the drive plate by toggling the drive rod protruding from the high-voltage cabinet to realize the opening operation, which not only ensures the airtightness of the circuit breaker and the three-phase circuit, but also improves the safety performance of the technician's opening operation.
[0016] Optionally, a positioning sleeve is rotatably provided on the limiting rod, the side of the accommodating groove is in a smoothly transitional arc shape, and the positioning sleeve is tightly fitted against the side of the driving plate.
[0017] By adopting the above technical scheme, when the driving plate slides to separate the pressure plate and the travel switch circuit board, the side of the accommodating groove is pressed against the positioning sleeve. Since the side of the accommodating groove is in a smooth transition, the positioning sleeve rotatably arranged on the limit rod is pressed against the boundary of the accommodating groove, thereby driving the positioning sleeve to rotate. The positioning sleeve is pressed against different parts of the side of the accommodating groove, so that the pressure plate can slide along the direction of the limiting hole. At this time, the pressure plate is driven away from the travel switch circuit board to achieve separation. The smooth transition of the accommodating groove and the rotatably arranged positioning sleeve cooperate to facilitate the sliding operation of the driving plate by technicians and reduce problems such as jamming of the pressure plate during adjustment.
[0018] Optionally, the fixed plate is also provided with a guide member for guiding the sliding direction of the driving plate, the guide member includes a guide sleeve arranged on the fixed plate, the driving plate is provided with a guide groove, the guide sleeve is slidably arranged in the guide groove, and the opening direction of the guide groove is consistent with the sliding direction of the driving plate.
[0019] By adopting the above technical solution, when the driving plate needs to slide, the guide sleeve slides in the guide groove, thereby limiting the sliding direction of the driving plate, making it difficult for the driving plate to deviate in the sliding direction, and at the same time making it difficult for the driving plate to slide excessively when sliding, causing the accommodating groove to correspond to another limiting hole.
[0020] Optionally, one end of the guide sleeve protrudes from the guide groove, and a guide ring is provided at the end of the guide sleeve protruding from the guide groove, and the guide ring is in contact with a side of the drive plate away from the fixed plate.
[0021] By adopting the above technical solution, the provided guide ring limits the positions of the driving plate and the fixed plate, so that the driving plate is not easily separated from the fixed plate, thereby achieving stable adjustment of the driving plate.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. Through the sliding pressure plate set on the fixed plate, the adjusting member for sliding adjustment of the pressure plate, and the travel switch circuit board movably fitted with the pressure plate, when the closing operation is required, the current fluctuation of the three-phase current drives the adjusting member to slide and adjust the pressure plate, thereby realizing the closing of the three-phase circuit and the equipment, reducing the ablation of the contacts by the arc generated during closing, and improving the service life of the equipment;
[0024] 2. Through the electromagnetic components, the current fluctuation of the three-phase circuit can be accurately judged, so as to further reduce the arc erosion on the contacts while closing the three-phase circuit separately;
[0025] 3. Through the sliding drive plate and the accommodating slot opened on the drive plate, when the technicians need to perform a unified opening operation, they only need to slide the drive plate to realize the synchronous opening operation of the three-phase circuit, which is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the overall structure of a circuit breaker interlocking mechanism according to an embodiment of the present application;
[0027] Figure 2 It is a schematic diagram of the connection structure of the drive components;
[0028] Figure 3 It is a schematic diagram of the connection structure of the fixed plate and the driving plate;
[0029] Figure 4 It is a schematic diagram of the connection structure of the pressure plate, the driving assembly, and the fixed plate.
[0030] Figure numerals: 1. Magnetic part; 2. Driving assembly; 2-1. Pressure plate; 2-2. Connecting plate; 2-3. Positioning sleeve; 2-4. Fixing screw; 3. Signal assembly; 3-1. Travel switch circuit board; 3-2. Bracket; 3-3. Guide ring; 4. Driving rod; 5-1. Fixing plate; 5-2. Driving plate; 5-3. Connecting seat; 5-4. Guide sleeve. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-4 This application is described in further detail.
[0032] First of all, it should be explained that a circuit breaker interlocking mechanism disclosed in this application uses the high-voltage cabinet as the operating environment to realize power supply and disconnection between the high-voltage cabinet and the equipment. In order to show the specific structure of the circuit breaker in this application, the cabinet structure is not displayed.
[0033] The present application embodiment discloses a circuit breaker interlocking mechanism. Figure 1 , Figure 2 , Figure 3 and Figure 4 A circuit breaker interlocking mechanism includes a fixed plate 5-1 fixed in a high-voltage cabinet and a signal component 3 arranged on the fixed plate 5-1, the length direction of the fixed plate 5-1 is horizontal, and the fixed plate 5-1 is arranged vertically, and a driving component 2 is also arranged on the fixed plate 5-1, and three groups of signal components 3 are arranged at intervals along the length direction of the fixed plate 5-1, the signal component 3 includes a travel switch circuit board 3-1 electrically connected to the equipment and a bracket 3-2 for fixing the travel switch circuit board 3-1 to the fixed plate 5-1, the driving component 2 includes a pressing plate 2-1 slidably arranged in the cabinet, and the pressing plate 2-1 is movably fitted and pressed against the travel switch circuit board 3-1; the driving component 2 also includes an adjusting member electrically connected to the three-phase circuit, and the adjusting member is used to slide and adjust the pressing plate 2-1; and when the middle current of the three-phase circuit is zero, the adjusting member drives the pressing plate 2-1 to slide downward, so that the pressing plate 2-1 fits with the travel switch circuit board 3-1.
[0034] The adjusting member is arranged on the magnetic member 1 on one side of the fixed plate 5-1, and the pressure plate 2-1 is a metal pressure plate 2-1. When the magnetic member 1 is energized, the pressure plate 2-1 slides downward under the action of magnetic attraction, thereby achieving the fitting of the pressure plate 2-1 and the travel switch circuit board 3-1 to realize the closing operation.
[0035] Furthermore, in order to facilitate the limiting of the sliding direction of the pressing plate 2-1, a connecting plate 2-2 is further provided on one side of the fixed plate 5-1. The pressing plate 2-1 is in an "L" shape. The horizontal portion of the pressing plate 2-1 fits with the travel switch circuit board 3-1, and the vertical portion of the pressing plate 2-1 fits and slides with the fixed plate 5-1. The vertical portion of the pressing plate 2-1 and the connecting plate 2-2 clamp the fixed plate 5-1, thereby limiting the sliding direction of the pressing plate 2-1, so that the pressing plate 2-1 is not easy to deviate. The driving assembly 2 also includes a connecting plate 2-2 that penetrates the pressing plate 2-1. The limiting rod 2-4 of the vertical part 1 is provided with a limiting hole on the fixed rod, the limiting hole is a waist-shaped hole, and the opening direction of the limiting hole is vertical, the limiting rod 2-4 is slidably adapted to the inner side wall of the limiting hole, so that when the closing and opening operations are performed, under the limitation of the limiting rod 2-4 and the limiting hole, the pressing plate 2-1 is only easy to slide along the vertical direction, that is, only the closing and opening operations are easy to occur, and it is not easy to produce a cheap, so that the closing and opening operations are stable; in order to facilitate the acquisition of raw materials, the limiting rod 2-4 in the present application is in the form of a screw.
[0036] In actual use, when the device is powered off and needs to be opened, the pressure plate 2-1 is connected to the device without current, so whether it is opened uniformly or individually, it is not easy to cause ablation. If the three-phase circuit is opened uniformly at this time, the operation is relatively simple. In order to achieve this purpose, a driving plate 5-2 is slidably provided on the side of the fixed plate 5-1 away from the magnetic part 1. The sliding direction of the driving plate 5-2 is consistent with the length direction of the fixed plate 5-1. A receiving groove is provided on the driving plate 5-2. There are three groups of receiving grooves, and the three groups of receiving grooves correspond to the three groups of limiting holes one by one. At the same time, the bottom side of the receiving groove is flush with the bottom side of the limiting hole, that is, when in the closed state, the limiting rod 2-4 is located at the bottom of the limiting hole. At this time, the receiving groove does not affect the normal closed state.
[0037] The side of the accommodating groove has an arc-shaped transition, and the top side of the driving plate 5-2 is movably fitted and pressed against the outer peripheral side of the limiting rod 2-4. That is, when the driving plate 5-2 slides at this time, the smooth transition section of the accommodating groove is pressed against the limiting rod 2-4, thereby driving the limiting rod 2-4 to move upward in the limiting hole, thereby disconnecting the pressure plate 2-1 and the travel switch circuit board 3-1, and realizing the opening of the switch.
[0038] In order to further facilitate the sliding adjustment operation of the drive plate 5-2, a positioning sleeve 2-3 is rotatably arranged on the limit rod 2-4. In the present application, the positioning sleeve 2-3 is in the form of a bearing and is sleeved on the limit rod 2-4. When the drive plate 5-2 slides, the side of the accommodating groove is tightly pressed against the positioning sleeve 2-3, thereby driving the positioning sleeve 2-3 to rotate, further facilitating the lifting operation of the limit rod 2-4, thereby facilitating the upward sliding operation of the pressure plate 2-1, and facilitating the technicians to open the pressure plate 2-1.
[0039] Furthermore, since the entire circuit breaker is arranged in the cabinet body of the high-voltage cabinet, when the drive plate 5-2 needs to be slid, it is not convenient for the technician to directly slide the drive plate 5-2. Therefore, an adjusting member is also provided on the drive plate 5-2, and the adjusting member includes a drive rod 4 fixed to the side of the drive plate 5-2 away from the fixed plate 5-1, and one end of the drive rod 4 protrudes from the cabinet body of the high-voltage cabinet. Therefore, when the opening operation is required, the technician only needs to move the drive rod 4 to slide the drive plate 5-2 at this time, so as to realize the tight rotation of the positioning sleeve 2-3 by the side wall of the accommodating groove, thereby realizing the lifting of the pressure plate 2-1 and realizing the opening of the switch; in order to realize the stable connection between the drive rod 4 and the drive plate 5-2, a connecting seat 5-3 is fixedly connected to the drive plate 5-2, and the connecting seat 5-3 and the drive rod 4 are connected by screws or bolts.
[0040] At the same time, the driving plate 5-2 at this time needs to maintain contact with the fixed plate 5-1 during the sliding adjustment process in order to achieve the tight rotation of the positioning sleeve 2-3. Therefore, the sliding direction of the driving plate 5-2 also needs to be limited. The driving plate 5-2 is provided with a guide member for guiding the sliding direction of the driving plate 5-2, and then the fixed plate 5-1 is provided with a guide groove. The opening direction of the guide groove is consistent with the opening direction of the accommodating groove. The guide member includes a guide sleeve 5-4 fixedly passing through the driving plate 5-2, and the guide sleeve One end of 5-4 penetrates into the guide groove and slides with the inner wall of the guide groove, and both ends of the guide sleeve 5-4 are fixedly connected with guide rings 3-3. One guide ring 3-3 fits with the side of the driving plate 5-2 away from the fixed plate 5-1, and the other guide ring 3-3 fits with the side of the fixed plate 5-1 away from the driving plate 5-2. Therefore, under the action of the guide ring 3-3, the driving plate 5-2 always keeps fitting and sliding with the fixed plate 5-1, so that it is not easy to deviate in direction when the driving plate 5-2 slides.
[0041] The implementation principle of a circuit breaker interlocking mechanism in an embodiment of the present application is as follows: when a closing operation is required, the magnetic component 1 is connected to the three-phase circuit, and when the current of any phase in the three-phase circuit is zero, the magnetic component 1 attracts the pressure plate 2-1 to move downward until it fits with the travel switch circuit board 3-1, thereby realizing the closing operation; when an opening operation is required, the technician moves the drive rod 4 to drive the drive plate 5-2 to slide, and the positioning sleeve 2-3 is rotated under the pressing action of the accommodating groove, thereby realizing the upward sliding of the limit rod 2-4, realizing the upward movement of the pressure plate 2-1, realizing the separation of the pressure plate 2-1 and the travel switch circuit board 3-1, and realizing the synchronous opening operation of the three-phase circuit.
[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A circuit breaker interlocking mechanism, Features: The invention comprises a fixing plate (5-1) fixed to a high-voltage cabinet, a signal component (3) arranged on the fixing plate (5-1), and a drive component (2) arranged on the fixing plate (5-1), wherein the signal component (3) is provided in three groups, the three groups of the signal components (3) are arranged at intervals along the length direction of the fixing plate (5-1), and the three groups of the signal components (3) correspond to the three-phase circuits one by one, and the signal component (3) comprises a travel switch circuit board (3-1) connected to the three-phase circuit and a drive component (2) arranged on the fixing plate (5-1). The bracket (3-2) on the fixed plate (5-1), the driving assembly (2) comprising a pressing plate (2-1) slidably arranged on the fixed plate (5-1) and an adjusting member for slidingly driving the pressing plate (2-1), the pressing plate (2-1) and the travel switch circuit board (3-1) being movably fitted and pressed against each other, the adjusting member being electrically connected to the three-phase circuit, and when the current in the three-phase circuit is zero, the adjusting member drives the pressing plate (2-1) to fit and press against the travel switch circuit board (3-1).
2. A circuit breaker interlocking mechanism according to claim 1, Features: The adjusting member comprises a magnetic member (1) disposed on a fixed plate (5-1), the magnetic member (1) being electrically connected to the three-phase circuit, and when the magnetic member (1) is energized, the magnetic member (1) attracts the pressing plate (2-1) to move in a direction close to the travel switch circuit board (3-1).
3. A circuit breaker interlocking mechanism according to claim 2, Features: The fixed plate (5-1) is provided with a limit hole, the limit hole is consistent with the sliding direction of the pressure plate (2-1), the pressure plate (2-1) is provided with a limit rod (2-4), the limit rod (2-4) passes through the limit hole and is slidably connected to the inner side wall of the limit hole, and the fixed plate (5-1) is also provided with a synchronization member for synchronously opening the three-phase circuit.
4. A circuit breaker interlocking mechanism according to claim 3, Features: The synchronous component comprises a driving plate (5-2) slidably arranged on the fixed plate (5-1); the driving plate (5-2) is provided with a receiving groove; the receiving groove is provided with three groups; the three groups of receiving grooves correspond to the three groups of limiting holes in a one-to-one manner; the bottom side of the receiving groove is flush with the bottom side of the limiting hole; the driving plate (5-2) is movably fitted and tightly pressed against the peripheral side of the limiting rod (2-4) at the side of the receiving groove; and the driving plate (5-2) is provided with an adjusting member for slidingly adjusting the driving plate (5-2).
5. A circuit breaker interlocking mechanism according to claim 4, Features: The adjusting member comprises a driving rod (4) provided on the driving plate (5-2), and the driving rod (4) protrudes from the high-voltage cabinet.
6. A circuit breaker interlocking mechanism according to claim 5, Features: A positioning sleeve (2-3) is rotatably provided on the limiting rod (2-4); the side of the accommodating groove is in the shape of a smoothly transitioned arc surface; the positioning sleeve (2-3) is tightly fitted against the side of the driving plate (5-2).
7. A circuit breaker interlocking mechanism according to claim 6, Features: The fixed plate (5-1) is also provided with a guide member for guiding the sliding direction of the driving plate (5-2), the guide member comprising a guide sleeve (5-4) provided on the fixed plate (5-1), a guide groove being provided on the driving plate (5-2), the guide sleeve (5-4) being slidably arranged in the guide groove, and the opening direction of the guide groove is consistent with the sliding direction of the driving plate (5-2).
8. A circuit breaker interlocking mechanism according to claim 7, Features: One end of the guide sleeve (5-4) protrudes from the guide groove, and a guide ring (3-3) is provided at the end of the guide sleeve (5-4) protruding from the guide groove, and the guide ring (3-3) is in contact with a side of the drive plate (5-2) away from the fixed plate (5-1).