Circuit breaker cabinet dual-power-supply spare power automatic switching interlocking device and circuit breaker cabinet thereof
By introducing an interlocking device into the circuit breaker cabinet, the principle of interlocking lever ensures the accuracy of failover of the main power supply to the backup power supply and the operation of a single power supply, the problems of inaccurate and high complexity of fault detection in existing systems are solved, and the problem of low fault detection is reduced. The failure rate and maintenance cost of the power system.
Patent Information
- Application Number
- CN202420889372.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The existing circuit breaker cabinet dual power supply self-invested system has problems such as inaccurate fault detection, high system complexity and single point failure risk, resulting in power interruption or instability, which increases maintenance costs.
A dual power supply self-loading interlocking device including a closing and opening device, an interlocking bracket, an interlocking lever, a locking plate and an interlocking cam was designed. Through the lever principle of the interlocking lever, it ensures accurate switching to the main power supply in case of failure. Backup power supply and prevent dual power supply from running simultaneously, reducing system complexity and maintenance costs.
It effectively reduces the failure rate of switching to backup power when the main power supply fails, ensures that a single power supply is operated, avoids the problem of dual power supply running simultaneously, and reduces the complexity and maintenance costs of the system.
Smart Images
Figure CN222168301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a dual-power standby automatic interlocking device for a circuit breaker cabinet and the circuit breaker cabinet. Background Art
[0002] Circuit breaker cabinet dual power backup automatic switch is an electrical device used in circuit breaker cabinets, usually used in power systems, especially to ensure the continuity and reliability of power supply. This equipment has the following characteristics: Circuit breaker cabinets are used to control and protect circuits. Circuit breaker cabinets are usually a box containing multiple circuit breakers, which are switchgear for distributing power, protecting circuits and controlling circuits. Dual power backup refers to having two independent power supplies. Improve the reliability of the electrical system. If one power supply fails, the system can automatically switch to another power supply to ensure continuous power supply. Automatic switch means that the equipment has an automatic switching function. When one power supply fails, it can automatically connect the load to the backup power supply, thereby maintaining the continuity of power supply without manual intervention.
[0003] Therefore, dual power backup automatic transfer is a common and widely used device.
[0004] The existing dual power supply backup automatic switching has the following problems:
[0005] 1. Inaccurate fault detection: When the backup automatic switching system detects a main power failure and switches to the backup power supply, there may be misjudgment or delay, resulting in power outage or instability;
[0006] 2. System complexity and maintenance costs: The backup and automatic start-up system usually involves complex circuits and control logic, which increases the design, installation and maintenance costs of the system. In addition, the backup and automatic start-up equipment needs to be regularly inspected and maintained to ensure its reliability and performance.
[0007] 3. Single point failure risk: The backup automatic start-up system itself may become a single point of failure in the system. If there is a problem or failure in the backup automatic start-up system itself, it will cause a power outage or interruption in the entire power system. Utility Model Content
[0008] The purpose of the utility model is to provide a dual power backup automatic interlocking device for a circuit breaker cabinet and a circuit breaker cabinet thereof. The dual power backup automatic interlocking device for a circuit breaker cabinet and the circuit breaker cabinet thereof can reduce the failure rate when switching to the backup power supply when the main power supply fails and ensure the operation of a single power supply, and will not cause the problem of dual power supplies running at the same time, and reduce the system complexity and maintenance cost.
[0009] The above technical objectives of the utility model are achieved through the following technical solutions:
[0010] A dual-power standby automatic interlocking device for a circuit breaker cabinet is applied to a circuit breaker cabinet containing a main power supply and a standby power supply, and comprises: two closing and opening devices; an interlocking bracket, which is arranged between the two closing and opening devices; a mounting groove, which is arranged on one side of the interlocking bracket; an interlocking lever, which is hinged in the mounting groove; two locking plates, which are respectively arranged at both ends of the interlocking lever; and two interlocking plates, which are respectively connected to the two closing and opening devices and abut against the corresponding locking plates.
[0011] The utility model is further configured to include two interlocking cams, which are respectively arranged on the tops of the two interlocking plates and connected to corresponding closing spindles.
[0012] The utility model is further configured as follows: when the main power supply is closed through the closing and opening device, the corresponding interlocking cam pushes the interlocking plate to move downward, and the downward movement of the interlocking plate pushes the locking plate to rotate, so that the locking plate prevents the interlocking plate on the other side from moving downward, thereby preventing the backup power supply from closing.
[0013] The utility model is further configured such that when the main power fails and opens, the interlock cam rotates in the opposite direction so that the interlock plate is no longer subjected to thrust, and the backup power is closed to push the interlock plate downward and push the interlock cam on one side of the main power to lock, thereby preventing the main power from closing.
[0014] A circuit breaker cabinet adopts the above-mentioned dual power supply standby automatic throw-in interlocking device of the circuit breaker cabinet.
[0015] In summary, the utility model has the following beneficial effects: the dual power backup automatic interlocking device of the circuit breaker cabinet and the circuit breaker cabinet thereof can reduce the failure rate when switching to the backup power supply when the main power fails and ensure the operation of a single power supply, and there will be no problem of dual power supplies running at the same time, and the system complexity is reduced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of an embodiment;
[0017] Figure 2 is a side structural schematic diagram of an embodiment;
[0018] Figure 3 for Figure 2 A magnified view of area A;
[0019] Figure 4 for Figure 2 Magnified view of area B.
[0020] Figure numerals: 1. Closing and opening device; 2. Interlocking bracket; 3. Mounting groove; 4. Interlocking lever; 5. Locking plate; 6. Interlocking plate; 7. Interlocking cam; 8. Closing main shaft; 9. Main power supply; 10. Backup power supply. DETAILED DESCRIPTION
[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0023] In the description of the present utility model, "multiple" means two or more than two, unless otherwise clearly specified and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0025] like Figure 1 As shown, a dual power supply standby automatic interlocking device for a circuit breaker cabinet is applied to a circuit breaker cabinet system. The circuit breaker cabinet system includes a dual power supply and a closing and opening device 1 connected to the dual power supply. The closing and opening device 1 is a common setting in the existing circuit breaker cabinet, which mainly plays the function of power opening and closing. It is a prior art and will not be described in detail.
[0026] like Figure 2 , Figure 3 , Figure 4As shown, the dual power standby automatic interlocking device of the circuit breaker cabinet includes an interlocking bracket 2 arranged between two closing and opening devices 1. The interlocking bracket 2 is door-shaped, and both ends are fixedly connected to the closing and opening devices 1. A mounting groove 3 is arranged on one side of the interlocking bracket 2. An interlocking lever 4 is hinged in the mounting groove 3. The interlocking lever 4 is hinged to the middle part of the interlocking bracket 2 and the two ends extend to both sides, and a locking plate 5 is arranged at the end. An interlocking plate 6 connected to the closing and opening device 1 is arranged above the locking plate 5.
[0027] like Figure 1 , Figure 2 As shown, an interlocking cam 7 is provided on the top of the interlocking plate 6. The interlocking cam 7 is connected to the closing main shaft 8. When the main power supply 9 is closed, the closing main shaft 8 rotates, so that when the power supply is closed, the far end of the interlocking cam 7 contacts the top of the interlocking plate 6 and pushes the interlocking plate 6 to move downward. When the interlocking plate 6 moves downward, it abuts against the locking plate 5, so that the locking plate 5 rotates under the action of the interlocking plate 6. Among them, the interlocking lever 4 connected to the locking plate 5 rotates around the center point, so that the interlocking lever 4 on the side of the main power supply 9 swings downward, and the interlocking lever 4 on the side of the backup power supply 10 swings upward.
[0028] The locking plate 5 on the side of the backup power supply 10 abuts against the bottom of the interlocking plate 6, thereby preventing the interlocking plate 6 from moving downward, thereby controlling the cam to rotate and prevent the switch from closing, thereby achieving the purpose of interlocking.
[0029] When the main power supply 9 fails and automatically opens, the cam rotates in the opposite direction to reset. At this time, the interlocking plate 6 at the position of the main power supply 9 is no longer squeezed by the interlocking cam 7. The backup power supply 10 is closed, so that the interlocking plate 6 of the backup power supply 10 moves down, so that when the backup power supply 10 is started, the interlocking plate 6 of the main power supply 9 is pushed to lock the interlocking cam 7, and the closing main shaft 8 cannot be driven to rotate before the main power supply 9 is repaired.
[0030] As described above, through the lever principle of the interlocking lever 4, the two ends of the interlocking lever 4 are bound to be in a tendency of swinging one end upward and the other end downward, thereby playing the interlocking locking function to prevent the simultaneous operation of dual power supplies from causing failure of the entire circuit breaker cabinet, so that it can accurately reduce the failure rate when switching to the backup power supply 10 when the main power supply 9 fails and ensure the operation of a single power supply, and there will be no problem of dual power supplies running at the same time, and the system complexity is reduced, reducing maintenance costs.
[0031] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A circuit breaker cabinet dual power supply automatic interlocking device, applied to a circuit breaker cabinet containing a main power supply (9) and a backup power supply (10), characterized in that ,include: Two closing and opening devices (1); An interlocking bracket (2), wherein the interlocking bracket (2) is arranged between the two closing and opening devices (1); An interlocking lever (4), wherein the interlocking lever (4) is hingedly connected to the interlocking bracket (2); Two locking plates (5), the two locking plates (5) being respectively arranged at two ends of the interlocking lever (4); Two interlocking plates (6), the two interlocking plates (6) being respectively connected to the two closing and opening devices (1) and abutting against the corresponding locking plates (5).
2. The circuit breaker cabinet dual power supply automatic interlocking device according to claim 1 is characterized in that , further comprising two interlocking cams (7), the two interlocking cams (7) being respectively arranged on the tops of the two interlocking plates (6) and connected to corresponding closing spindles (8).
3. The circuit breaker cabinet dual power supply automatic interlocking device according to claim 2 is characterized in that When the main power source (9) is closed by the closing and opening device (1), the corresponding interlocking cam (7) pushes the interlocking plate (6) to move downward, and the downward movement of the interlocking plate (6) pushes the locking plate (5) to rotate, so that the locking plate (5) prevents the interlocking plate (6) on the other side from moving downward, thereby preventing the backup power source (10) from closing.
4. The circuit breaker cabinet dual power supply automatic interlocking device according to claim 3 is characterized in that When the main power supply (9) fails and opens, the interlocking cam (7) rotates in the opposite direction so that the interlocking plate (6) is no longer subjected to thrust, and the backup power supply (10) closes, pushing the interlocking plate (6) downward and pushing the interlocking cam (7) on one side of the main power supply (9) to lock, thereby preventing the main power supply (9) from closing.
5. A circuit breaker cabinet, characterized in that , including the dual power backup automatic interlocking device for the circuit breaker cabinet as described in any one of claims 1 to 4.