A circuit breaker interlock device for disconnectors and earthing switches
Patent Information
- Application Number
- CN202522101137.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-29
AI Technical Summary
Traditional circuit breakers, disconnectors, and grounding switches have complex interlocking devices that are inconvenient to operate and may increase the burden on the operating mechanism, affecting the stable operation of the power system.
An interlocking device was designed, comprising components such as a circuit breaker interlocking lever, an interlocking device pull rod, a transmission arm, and a return spring. This device achieves interlocking control between the circuit breaker, disconnecting switch, and grounding switch through a simple mechanical structure, avoiding additional burden.
It achieves interlocking control with simple structure and convenient operation, ensuring the stable operation of the power system, reducing the burden on the operating mechanism, and improving the flexibility and reliability of transmission.
Smart Images
Figure CN224934680U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of interlocking technology for switchgear equipment in power systems, specifically to an interlocking device for circuit breakers, disconnectors, and grounding switches. Background Technology
[0002] In power systems, circuit breakers, disconnectors, and grounding switches are critical electrical devices, and their operating sequence and status are crucial to the safe operation of the system. Traditional interlocking devices are often complex in structure and inconvenient to operate, and may increase the burden on the operating mechanisms of circuit breakers, disconnectors and grounding switches. Therefore, it is particularly important to develop an interlocking device that is simple in structure, easy to operate and does not add extra burden. Utility Model Content
[0003] In order to solve the above problems, the purpose of this utility model is to provide a circuit breaker interlocking device with disconnecting switch and grounding switch.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a circuit breaker interlocking device with a disconnecting switch and a grounding switch, the interlocking device including a circuit breaker interlocking lever, a circuit breaker interlocking lever bracket, a circuit breaker interlocking device adjusting locking rod, an interlocking device pull rod, a first circuit breaker interlocking transmission arm, an isolation limiting component, a second circuit breaker interlocking transmission arm, a return spring, a grounding transmission crank arm, a grounding rotating connecting rod, a grounding limiting component, a grounding interlock component, a compression spring for the grounding interlock component and the isolation interlock component, an isolation interlock component, an isolation indicating transmission crank arm, a circuit breaker locking mechanism, an isolation operating hole cover plate, a grounding operating hole cover plate, an isolation operating hole interlocking plate, and a grounding operating hole interlocking plate; The circuit breaker interlocking lever is hingedly mounted on the circuit breaker interlocking lever bracket. One end of the circuit breaker interlocking lever is in movable contact with one end of the circuit breaker interlocking device adjusting rod, and the other end of the circuit breaker interlocking device adjusting rod is in movable contact with the bottom of the circuit breaker locking mechanism. One end of the interlocking device lever is hinged to one end of the circuit breaker interlocking lever, and the other end of the interlocking device lever is hinged to the No. 2 circuit breaker interlocking transmission arm. The No. 1 circuit breaker interlocking transmission arm is hinged to the No. 2 circuit breaker interlocking transmission arm. The isolation limiting member is hinged to one end of the isolation indicating transmission crank arm. One end of the isolation interlocking member is in movable contact with the isolation limiting member. The reset spring is hinged to the No. 2 circuit breaker interlocking transmission arm. The grounding transmission crank arm is hinged to one end of the grounding rotating link, and the other end of the grounding rotating link is hinged to the grounding limiting member. One end of the grounding interlocking member and one end of the grounding limiting member are in movable contact. The compression springs of the grounding interlocking member and the isolation interlocking member are assembled between the isolation interlocking member and the grounding interlocking member. The isolation operation hole cover and the isolation operation hole interlocking plate are assembled on the isolation interlocking component, and the grounding operation hole cover and the grounding operation hole interlocking plate are assembled on the grounding interlocking component.
[0005] Preferably, the interlocking device further includes a circuit breaker opening / closing indicator, a circuit breaker opening button, and a circuit breaker closing button.
[0006] Preferably, the isolation interlocking component is equipped with an isolation open / close indicator, and the grounding interlocking component is equipped with a grounding open / close indicator.
[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, the interlocking device has a simple structure, few parts, and is easy to process and install; 2. In this utility model, the interlocking control between the circuit breaker, the disconnecting switch, and the grounding switch can be achieved by moving the movable baffle, which is simple to operate; 3. In this utility model, the interlocking device will not increase the burden on the operating mechanisms of the circuit breaker, disconnector, and grounding switch, thus ensuring the stable operation of the power system; 4. In this utility model, the force generated when the transmission arm and the interlocking rod of the interlocking device are in a limiting fit will act on the hinge shaft of the interlocking lever plate, so that the connecting rod connected to the interlocking lever plate is subjected to small force, which has almost no impact on the circuit breaker, and the transmission is flexible and highly reliable. Attached Figure Description
[0008] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a schematic diagram of the interlocking device between the disconnecting switch, circuit breaker, and grounding switch of this utility model (disconnecting switch closed, circuit breaker closed, grounding switch open).
[0010] Figure 2 This utility model illustrates the structure of the interlocking device for the disconnecting switch, circuit breaker, and grounding switch. Intent (disconnector switch tripped, circuit breaker tripped, grounding switch tripped status).
[0011] Figure 3 This is a side view of the structure of the interlocking device for the disconnecting switch, circuit breaker, and grounding switch of this utility model.
[0012] Figure 4This is a partial structural diagram of the disconnector and circuit breaker interlocking device of this utility model. Figure 1 (The circuit breaker is closed, and the circuit breaker locking mechanism is in the locked state.)
[0013] Figure 5 This is a partial structural diagram of the disconnector and circuit breaker interlocking device of this utility model. Figure 2 (The circuit breaker trips, and the circuit breaker locking mechanism is released.)
[0014] Figure 6 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 1 .
[0015] Figure 7 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 2 .
[0016] Figure 8 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 3 .
[0017] Figure 9 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 4 .
[0018] Figure 10 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 5 .
[0019] Figure 11 This is a partial schematic diagram of the structure of the disconnector and grounding switch panel of this utility model. Figure 6 .
[0020] Figure 12 This is a schematic diagram showing that both the isolation and grounding circuits of this utility model are tripped.
[0021] Figure 13 This is a schematic diagram of the isolation closing and grounding opening of this utility model.
[0022] Figure 14 This is a schematic diagram of the isolation tripping and grounding closing of this utility model.
[0023] In the diagram: 1. Circuit breaker interlocking lever; 2. Circuit breaker interlocking lever bracket; 3. Circuit breaker interlocking device adjusting lever; 4. Circuit breaker open / close indicator; 5. Circuit breaker open button; 6. Circuit breaker close button; 7. Interlocking device pull rod; 8. No. 1 circuit breaker interlocking transmission arm; 9. Isolation limit element; 10. No. 2 circuit breaker interlocking transmission arm; 11. Return spring; 12. Grounding transmission crank arm; 13. Grounding rotation linkage; 14. Grounding limit. Components; 15. Grounding interlock component; 16. Grounding interlock component and isolating interlock component compression spring; 17. Isolating interlock component; 18. Isolating indicator transmission crank arm; 19. Circuit breaker locking mechanism; 25. Isolating open / close indicator; 26. Grounding open / close indicator; 29. Isolating operating hole cover plate; 30. Grounding operating hole cover plate; 39. Isolating operating hole interlock plate; 40. Grounding operating hole interlock plate; 50. Isolating and grounding interlock device; 51. Circuit breaker mechanism. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example: Figure 1-14 As shown, this utility model provides an interlocking device for a circuit breaker, a disconnecting switch, and a grounding switch. The interlocking device includes a circuit breaker interlocking lever 1, a circuit breaker interlocking lever bracket 2, a circuit breaker interlocking device adjusting locking rod 3, a circuit breaker open / close indicator 4, a circuit breaker open button 5, a circuit breaker close button 6, an interlocking device pull rod 7, a first circuit breaker interlocking transmission arm 8, an isolation limit component 9, a second circuit breaker interlocking transmission arm 10, a return spring 11, a grounding transmission crank arm 12, a grounding rotating connecting rod 13, a grounding limit component 14, a grounding interlock component 15, a compression spring for the grounding interlock component and the isolation interlock component 16, an isolation interlock component 17, an isolation indicator transmission crank arm 18, a circuit breaker locking mechanism 19, an isolation operation hole cover plate 29, a grounding operation hole cover plate 30, an isolation operation hole interlocking plate 39, and a grounding operation hole interlocking plate 40. The circuit breaker interlock lever 1 is hinged on the circuit breaker interlock lever bracket 2. One end of the circuit breaker interlock lever 1 is in movable contact with one end of the circuit breaker interlock device adjusting rod 3, and the other end of the circuit breaker interlock device adjusting rod 3 is in movable contact with the bottom of the circuit breaker locking mechanism 19. One end of the interlocking device lever 7 is hinged to one end of the circuit breaker interlocking lever 1, and the other end of the interlocking device lever 7 is hinged to the No. 2 circuit breaker interlocking transmission arm 10. The No. 1 circuit breaker interlocking transmission arm 8 is hinged to the No. 2 circuit breaker interlocking transmission arm 10. The isolation limit member 9 is hinged to one end of the isolation indicating transmission crank arm 18. One end of the isolation interlocking member 17 is in active contact with the isolation limit member 9. The reset spring 11 is hinged to the No. 2 circuit breaker interlocking transmission arm 10. The isolation and grounding interlocking device 50 is assembled on the isolation limit member 9. The circuit breaker mechanism 51 is assembled on the circuit breaker locking mechanism 19. The grounding transmission crank arm 12 is hinged to one end of the grounding rotating link 13, and the other end of the grounding rotating link 13 is hinged to the grounding limiting member 14. One end of the grounding interlocking member 15 is in contact with one end of the grounding limiting member 14. The grounding interlocking member and the isolation interlocking member compression spring 16 are assembled between the isolation interlocking member 17 and the grounding interlocking member 15. The isolation operation hole cover plate 29 and the isolation operation hole interlock plate 39 are assembled on the isolation interlock component 17, the grounding operation hole cover plate 30 and the grounding operation hole interlock plate 40 are assembled on the grounding interlock component 15, the isolation interlock component 17 is equipped with an isolation closing indicator 25, and the grounding interlock component 15 is equipped with a ground closing indicator 26.
[0026] When the disconnector switch is closed, the circuit breaker is closed, and the grounding switch is open, the circuit breaker locking mechanism 19 is in the locked position. Figure 4 As shown, the circuit breaker interlocking device adjusting rod 3 and the circuit breaker interlocking lever 1 are connected to the second circuit breaker interlocking transmission arm 10 through the interlocking device pull rod 7. The return spring 11 forms a return spring, which is used to keep the second circuit breaker interlocking transmission arm 10 and the circuit breaker interlocking lever 1 in the initial position. If the disconnecting switch is to be operated from the closed to the open position, the disconnecting operation hole cover plate 29 moves to the right and cannot drive the second circuit breaker interlocking transmission arm 10 and the first circuit breaker interlocking transmission arm 8 to rotate. At this time, the disconnecting operation hole of the disconnecting operation hole cover plate 29 is blocked, and the disconnecting switch cannot be operated, ensuring that the disconnecting switch cannot be operated when the circuit breaker is closed. Combination Figure 6-8 and Figure 12-14 When the disconnecting switch is closed, the disconnecting interlock 17 moves to the right, which prevents the grounding operation hole interlock plate 40 and the grounding operation hole cover plate 30 from moving to the left. The grounding operation hole of the grounding operation hole cover plate 30 cannot be opened. The interlocking device only allows the grounding switch to close when the disconnecting switch is open, so as to ensure that the equipment is safely isolated and can be grounded. When the circuit breaker is open, the disconnector is open, and the grounding switch is open, the circuit breaker locking mechanism 19 is released from its locked position. Figure 5As shown, if the disconnecting switch is to be operated from the open to the closed position, the disconnecting operation hole cover plate 29 moves to the right, causing the No. 2 circuit breaker interlocking transmission arm 10 and the No. 1 circuit breaker interlocking transmission arm 8 to rotate. At this time, the interlocking device pull rod 7 moves downward, and the circuit breaker interlocking device adjusting locking rod 3 drives the circuit breaker locking mechanism 19 to move upward through the fulcrum, exposing the disconnecting operation hole of the disconnecting operation hole cover plate 29, allowing the disconnecting switch to be operated. This ensures that the disconnecting switch can only be operated when the circuit breaker is in the open state.
[0027] Working principle: Interlocking of circuit breakers and disconnectors: When the circuit breaker is in the closed state, regardless of whether the disconnecting switch is in the closed or open position, the interlocking rod of the interlocking device is locked in the limiting cooperation with the closing limit block of the circuit breaker and cannot move the isolation operation hole cover 29. The isolation operation hole of the isolation operation hole cover 29 is blocked, making the disconnecting switch unable to operate. When the circuit breaker is in the open state, the interlocking rod limit of the interlocking device is released, the movable isolation operation hole cover 29 is exposed to the isolation operation hole, and the disconnecting switch can be operated. The disconnecting switch does not affect the opening and closing operation of the circuit breaker regardless of whether it is in the closed or open state. Interlocking between disconnecting switch and grounding switch: When the disconnecting switch is in the open position, the interlocking device allows the grounding switch to be closed to ensure that the equipment is safely isolated and can be grounded. When the grounding switch is in the closed state, the interlocking device will prevent the isolation device from performing the closing operation.
[0028] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A circuit breaker interlocking device with a disconnecting switch and a grounding switch, characterized in that, The interlocking device includes a circuit breaker interlocking lever (1), a circuit breaker interlocking lever bracket (2), a circuit breaker interlocking device adjusting lock rod (3), an interlocking device pull rod (7), a first circuit breaker interlocking transmission arm (8), an isolation limit piece (9), a second circuit breaker interlocking transmission arm (10), a reset spring (11), a grounding transmission crank arm (12), a grounding rotating connecting rod (13), a grounding limit piece (14), a grounding interlocking piece (15), a grounding interlocking piece and an isolation interlocking piece compression spring (16), an isolation interlocking piece (17), an isolation indicating transmission crank arm (18), a circuit breaker locking mechanism (19), an isolation operating hole cover plate (29), a grounding operating hole cover plate (30), an isolation operating hole interlocking plate (39), and a grounding operating hole interlocking plate (40). The circuit breaker interlock lever (1) is hinged on the circuit breaker interlock lever bracket (2). One end of the circuit breaker interlock lever (1) is in contact with one end of the circuit breaker interlock device adjusting rod (3), and the other end of the circuit breaker interlock device adjusting rod (3) is in contact with the bottom of the circuit breaker locking mechanism (19). One end of the interlocking device lever (7) is hinged to one end of the circuit breaker interlocking lever (1), and the other end of the interlocking device lever (7) is hinged to the second circuit breaker interlocking transmission arm (10). The first circuit breaker interlocking transmission arm (8) is hinged to the second circuit breaker interlocking transmission arm (10). The isolation limiting member (9) is hinged to one end of the isolation indicating transmission crank arm (18). One end of the isolation interlocking member (17) is in active contact with the isolation limiting member (9). The reset spring (11) is hinged to the second circuit breaker interlocking transmission arm (10). The grounding transmission crank arm (12) is hinged to one end of the grounding rotating link (13), and the other end of the grounding rotating link (13) is hinged to the grounding limiting member (14). One end of the grounding interlocking member (15) and one end of the grounding limiting member (14) are in active contact. The grounding interlocking member and the isolation interlocking member compression spring (16) are assembled between the isolation interlocking member (17) and the grounding interlocking member (15). The isolation operation hole cover plate (29) and the isolation operation hole interlock plate (39) are assembled on the isolation interlock component (17), and the grounding operation hole cover plate (30) and the grounding operation hole interlock plate (40) are assembled on the grounding interlock component (15).
2. The circuit breaker, disconnector, and grounding switch interlocking device as described in claim 1, characterized in that, The interlocking device also includes a circuit breaker opening / closing indicator (4), a circuit breaker opening button (5), and a circuit breaker closing button (6).
3. The circuit breaker, disconnector, and grounding switch interlocking device as described in claim 1, characterized in that, The isolation interlock (17) is equipped with an isolation connection / disconnection indicator (25), and the grounding interlock (15) is equipped with a grounding connection / disconnection indicator (26).