A reverse flow prevention quick power taking plug-in box
Patent Information
- Application Number
- CN202521893573.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-09-03
AI Technical Summary
[0003]传统插接箱的插脚固定于箱体内，插脚与母线槽的接口为刚性接触，虽能够确保初始装配精度，却无法缓解插拔瞬间的机械冲击，导致插脚根部反复承受集中应力，材料微观缺陷在长期使用中逐渐扩展，最终引发不可逆的结构失效
[0027]1.本申请利用插脚组件的滑动设计及弹性缓冲件的配合，实现插接箱与母线槽插接口的快速对接与缓冲保护，插脚本体通过柔性连接件与断路器电性连接，既保证了电气连接的可靠性，又避免了插拔过程中的刚性拉扯损伤，弹性缓冲件在插接时吸收机械冲击，延长插接箱使用寿命，同时第一限位部和第二限位部限制了插脚组件的滑动行程，防止过度插入或脱离，提升操作安全性。
Smart Images
Figure CN224890295U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical equipment, and in particular to a plug-in box for fast power supply with backflow prevention. Background Technology
[0002] Plug-in boxes are busbar trunking accessories, primarily used to extend and expand the branch lines of the busbar trunking. A plug-in box typically contains a circuit breaker, which connects to the busbar trunking via plugs. The plugs connect to the circuit breaker's input terminals, and the electrical equipment connects to the circuit breaker's output terminals. The circuit breaker then disconnects and protects the circuit. This diverts the current from the main busbar trunking line to the electrical equipment, making it very convenient to use and maintain. When an overload or short circuit occurs in the circuit, the circuit breaker quickly disconnects the circuit, protecting the equipment and lines.
[0003] In traditional plug-in boxes, the pins are fixed inside the box, and the interface between the pins and the busbar is a rigid contact. While this ensures initial assembly accuracy, it cannot mitigate the mechanical impact during insertion and removal. This causes the pin roots to repeatedly bear concentrated stress, and microscopic defects in the material gradually expand over long-term use, eventually leading to irreversible structural failure. Related technologies improve reliability by enhancing the pin structure strength or increasing the number of pins, but these improvements often come at the cost of operational convenience—thicker pins require significantly more insertion force, and adding more contact structures can introduce new risks of uneven contact. Utility Model Content
[0004] In order to effectively mitigate the mechanical impact during plugging and unplugging and extend service life, this application provides a plug box with anti-backflow and fast power supply.
[0005] This application provides a plug-in box for preventing backflow and quickly drawing power, which adopts the following technical solution:
[0006] A plug-in box for preventing backflow and providing rapid power supply includes:
[0007] Box;
[0008] The circuit breaker is located inside the enclosure;
[0009] The plug assembly includes a plug body and an insulating part fixed to the outside of the plug body. The insulating part is slidably disposed on one side of the housing. The insulating part is provided with a first limiting part and a second limiting part. The first limiting part is disposed inside the housing, and the second limiting part is disposed outside the housing. One end of the plug body located inside the housing is electrically connected to a circuit breaker through a flexible connector. The other end of the plug body extending outside the housing is used to connect to the corresponding plug interface of the busbar trunking.
[0010] An elastic buffer is provided on the outside of the insulating part, with one end of the elastic buffer abutting the second limiting part and the other end abutting the outer wall of the box.
[0011] By adopting the above technical solution, and utilizing the sliding design of the plug assembly and the cooperation of the elastic buffer, the plug box and the busbar trunking interface can be quickly connected and buffered for protection. The plug body is electrically connected to the circuit breaker through a flexible connector, which not only ensures the reliability of the electrical connection, but also avoids rigid pulling damage during the plugging and unplugging process. The elastic buffer absorbs mechanical impact during plugging and extends the service life of the plug box. At the same time, the first and second limiting parts restrict the sliding stroke of the plug assembly, preventing over-insertion or disengagement and improving operational safety.
[0012] Optionally, the elastic buffer is a helical compression spring and is sleeved on the outside of the insulating part.
[0013] By adopting the above technical solution, the uniform elastic deformation characteristics of the helical compression spring provide a stable buffer force for the sliding of the pin assembly. Its structure, which is sleeved on the outside of the insulation part, makes full use of space, making the overall plug box compact. At the same time, the high fatigue resistance of the helical compression spring ensures that the buffer performance does not decay under long-term use, reducing the maintenance frequency.
[0014] Optionally, a buffer washer is provided on the side of the first limiting part near the second limiting part.
[0015] By adopting the above technical solution, the buffer gasket further absorbs the collision energy between the plug assembly and the inner wall of the box when the plug assembly slides, reduces the noise from hard contact between metal parts, avoids deformation of the insulation part or the box due to frequent collisions, and improves the structural stability and quiet operation of the plug box.
[0016] Optionally, a limiting member is provided on the side of the second limiting part near the first limiting part, and the thickness of the limiting member is not less than the length of the elastic buffer when it is at its compression limit.
[0017] By adopting the above technical solution, the compression limit of the elastic buffer is constrained by the thickness of the limiting component, preventing plastic deformation or elastic failure caused by excessive compression of the elastic buffer, and ensuring the buffering function is durable and reliable.
[0018] Optional, also includes:
[0019] A current direction detection element is installed inside the enclosure and configured to collect the current signal at the output terminal of the circuit breaker in real time and determine the current direction.
[0020] The controller is connected to the current direction detection element and the circuit breaker signal, and is configured to output a trip command to the circuit breaker when a reverse current is detected.
[0021] By adopting the above technical solution, the current direction detection element can monitor the current direction at the circuit breaker's outgoing terminal in real time. When it detects that the current is flowing back from the load side into the bus side, the controller immediately triggers the circuit breaker to trip, blocking the reverse flow path and preventing equipment damage or safety accidents caused by backfeeding from the power grid. At the same time, the automated protection mechanism reduces the need for manual intervention and improves the stability of the power system operation.
[0022] Optionally, the current direction detection element is a Hall effect sensor, located on one side of the outgoing terminal of the circuit breaker.
[0023] By adopting the above technical solution and using a Hall effect sensor as the current direction detection element, its non-contact measurement method avoids interference with the main circuit. Its high sensitivity and fast response characteristics ensure the accuracy of reverse current detection. Furthermore, the Hall effect sensor is directly placed near the circuit breaker's outgoing terminal, resulting in a short signal acquisition path and reduced signal delay, which helps improve the timeliness and reliability of protection actions.
[0024] Optionally, the controller signal is connected to a remote server.
[0025] By adopting the above technical solutions, it is easy to realize remote real-time monitoring of the operation status of the plug-in box and alarm of reverse current events. Maintenance personnel can remotely obtain fault information and send reset commands, shortening the time for fault diagnosis and power restoration, which is conducive to optimizing the efficiency of power grid management.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] 1. This application utilizes the sliding design of the pin assembly and the cooperation of the elastic buffer to achieve rapid docking and buffer protection between the plug box and the busbar trunking interface. The plug body is electrically connected to the circuit breaker through a flexible connector, which not only ensures the reliability of the electrical connection, but also avoids rigid pulling damage during the insertion and removal process. The elastic buffer absorbs mechanical impact during insertion and extends the service life of the plug box. At the same time, the first and second limiting parts restrict the sliding stroke of the pin assembly, preventing over-insertion or disengagement and improving operational safety. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of a plug box for preventing backflow and quickly drawing power according to an embodiment of this application.
[0029] Figure 2 This is a control principle diagram illustrating the controller in the embodiments of this application.
[0030] Figure 3 This is a cross-sectional view illustrating the pin assembly in the embodiments of this application.
[0031] Figure 4 yes Figure 3A magnified view of a portion of point A in the middle.
[0032] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Circuit breaker; 3. Current direction detection element; 4. Controller; 5. Remote server; 6. Pin assembly; 61. Pin body; 62. Insulation part; 621. First limiting part; 6211. Buffer washer; 622. Second limiting part; 6221. Limiting element; 63. Flexible connector; 7. Elastic buffer. Detailed Implementation
[0033] The following combination Figures 1-4 This application will be described in further detail below.
[0034] Example:
[0035] This application discloses a plug-in box with anti-backflow and fast power supply. (Refer to...) Figure 1 and Figure 2 A plug-in box for preventing reverse current and rapid power extraction includes a box body 1, a circuit breaker 2, a current direction detection element 3, and a controller 4. The circuit breaker 2 and the current direction detection element 3 are installed inside the box body 1. The current direction detection element 3 is used to collect the current signal at the output terminal of the circuit breaker 2 in real time and determine the current direction. The controller 4 is connected to the current direction detection element 3 and the circuit breaker 2 respectively, and is used to output a trip command to the circuit breaker 2 when a reverse current is detected.
[0036] When the plug-in box is plugged into the busbar trunking, the current direction detection element 3 can monitor the current direction at the output terminal of the circuit breaker 2 in real time. When the current is detected to flow from the load side into the busbar side in reverse, the controller 4 immediately triggers the circuit breaker 2 to trip, blocking the reverse flow path and preventing equipment damage or safety accidents caused by back power transmission from the power grid. At the same time, the automatic protection mechanism reduces the need for manual intervention and improves the stability of the power system operation.
[0037] Reference Figure 1 The current direction detection element 3 is a Hall effect sensor, which is located on one side of the outgoing terminal of circuit breaker 2. The magnetic sensitive surface of the Hall effect sensor is perpendicular to the current direction of the conductor at the outgoing terminal of circuit breaker 2. In this embodiment, a Hall effect sensor is used as the current direction detection element 3. Its non-contact measurement method avoids interference with the main circuit. Its high sensitivity and fast response characteristics ensure the accuracy of reverse current detection. Furthermore, the Hall effect sensor is directly located near the outgoing terminal of circuit breaker 2, resulting in a short signal acquisition path and reduced signal delay, which helps to improve the timeliness and reliability of protection actions.
[0038] Reference Figure 2The controller 4 is connected to a remote server 5. When the current direction detection element 3 detects reverse current, the controller 4 uploads the reverse current event and current direction data to the remote server 5, and can receive a reset command from the remote server 5 to release the circuit breaker 2 from its open state. This facilitates remote real-time monitoring of the plug-in box's operating status and reverse current event alarms. Maintenance personnel can remotely obtain fault information and send reset commands, shortening fault diagnosis and power restoration time, and improving grid management efficiency.
[0039] Reference Figure 1 , Figure 3 and Figure 4 The housing 1 is equipped with a plug assembly 6, which includes a plug body 61 and an insulating part 62 fixed to the outside of the plug body 61. The insulating part 62 is slidably inserted through one side of the housing 1. A first limiting part 621 and a second limiting part 622 are integrally formed on the insulating part 62, with the first limiting part 621 located inside the housing 1 and the second limiting part 622 located outside the housing 1. One end of the plug body 61 located inside the housing 1 is electrically connected to the circuit breaker 2 through a flexible connector 63, and the other end of the plug body 61 extending outside the housing 1 is used to connect to the corresponding plug interface of the busbar trunking. An elastic buffer 7 is provided on the outside of the insulating part 62, with one end of the elastic buffer 7 abutting against the second limiting part 622 and the other end abutting against the outer wall of the housing 1.
[0040] When connecting the plug box to the busbar trunking, the sliding design of the plug assembly 6 and the cooperation of the elastic buffer 7 are used to achieve quick docking and buffer protection between the plug box and the busbar trunking interface. The plug body 61 is electrically connected to the circuit breaker 2 through the flexible connector 63, which not only ensures the reliability of the electrical connection, but also avoids rigid pulling damage during the plugging and unplugging process. The elastic buffer 7 absorbs mechanical impact during plugging and extends the service life of the plug box. At the same time, the first limiting part 621 and the second limiting part 622 limit the sliding stroke of the plug assembly 6 to prevent over-insertion or disengagement and improve operational safety.
[0041] Reference Figure 4 The elastic buffer 7 is a helical compression spring and is sleeved on the outside of the insulating part 62. In this way, the uniform elastic deformation characteristics of the helical compression spring provide a stable buffering force for the sliding of the pin assembly 6. Its structure of being sleeved on the outside of the insulating part 62 makes full use of space, making the overall plug box compact. At the same time, the high fatigue resistance of the helical compression spring ensures that the buffering performance does not decrease under long-term use, reducing the maintenance frequency.
[0042] Reference Figure 4A buffer washer 6211 is fixed on the side of the first limiting part 621 near the second limiting part 622. In this embodiment, the buffer washer 6211 is made of rubber, which can further absorb the collision energy between the plug assembly 6 and the inner wall of the housing 1 when the plug assembly 6 slides, reduce the noise of hard contact between metal parts, avoid deformation of the insulation part 62 or the housing 1 due to frequent collisions, and improve the structural stability and quiet operation of the plug box.
[0043] Reference Figure 4 The second limiting part 622 has an integrally formed limiting member 6221 on the side near the first limiting part 621. The limiting member 6221 is ring-shaped, and its thickness is not less than the length of the elastic buffer 7 when it is at its compression limit. By limiting the compression limit of the elastic buffer 7 with the thickness of the limiting member 6221, the plastic deformation or elastic failure caused by excessive compression of the elastic buffer 7 is prevented, thus ensuring the long-lasting and reliable buffering function.
[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A plug-in box for preventing backflow and rapid power extraction, characterized in that, include: Box (1); Circuit breaker (2) is installed inside the enclosure (1); The plug assembly (6) includes a plug body (61) and an insulating part (62) fixed to the outside of the plug body (61). The insulating part (62) is slidably disposed on one side of the housing (1). The insulating part (62) is provided with a first limiting part (621) and a second limiting part (622). The first limiting part (621) is disposed inside the housing (1), and the second limiting part (622) is disposed outside the housing (1). One end of the plug body (61) located inside the housing (1) is electrically connected to the circuit breaker (2) through a flexible connector (63). The end of the plug body (61) extending out of the housing (1) is used to connect to the corresponding plug interface of the busbar. An elastic buffer (7) is provided on the outside of the insulating part (62), and one end of the elastic buffer (7) abuts against the second limiting part (622), and the other end abuts against the outer wall of the box (1).
2. The plug-in box for preventing backflow and rapid power extraction according to claim 1, characterized in that: The elastic buffer (7) is a helical compression spring and is sleeved on the outside of the insulating part (62).
3. The plug-in box for preventing backflow and rapid power extraction according to claim 1, characterized in that: A buffer washer (6211) is provided on the side of the first limiting part (621) near the second limiting part (622).
4. The plug-in box for preventing backflow and rapid power extraction according to claim 1, characterized in that: The second limiting part (622) is provided with a limiting member (6221) on the side near the first limiting part (621), and the thickness of the limiting member (6221) is not less than the length of the elastic buffer (7) when it is at the compression limit.
5. A plug-in box for preventing backflow and rapid power extraction according to claim 1, characterized in that, Also includes: A current direction detection element (3) is installed inside the housing (1) and configured to collect the current signal at the output terminal of the circuit breaker (2) in real time and determine the current direction. The controller (4) is connected to the current direction detection element (3) and the circuit breaker (2) and is configured to output a trip command to the circuit breaker (2) when a reverse current is detected.
6. A plug-in box for preventing backflow and quickly drawing power according to claim 5, characterized in that: The current direction detection element (3) is a Hall effect sensor and is located on one side of the outgoing terminal of the circuit breaker (2).
7. A plug-in box for preventing backflow and quickly drawing power according to claim 5, characterized in that: The controller (4) is connected to a remote server (5).