Intelligent transformer area low-voltage power distribution cabinet for power grid

Abstract

The invention mainly relates to the field of power distribution equipment, in particular to an intelligent district low-voltage power distribution cabinet for a power grid. The low-voltage power distribution cabinet comprises a cabinet body, an electric energy distribution module installed in the cabinet body, a data acquisition module and a sensor group connected with the electric energy distribution module. The bottom of the cabinet body is provided with a damping adjusting device. The vibration reduction adjusting device comprises a base shell, a sliding mass block, a driving assembly and a plurality of layers of elastic supporting pieces. The vibration damping adjusting device can optimize the vibration characteristics of the cabinet body, avoids the resonance phenomenon caused by the fact that the external micro vibration frequency is close to the inherent frequency of the cabinet body, reduces the possibility that the metal connecting piece has micro cracks in a stress concentration area, guarantees the connection stability between the sensor group and the electric energy distribution module, and guarantees the continuity of data transmission. In addition, parts of the device do not need to be replaced frequently, and maintenance cost is reduced.

Description

Technical Field

[0001] This invention mainly relates to the field of power distribution equipment, specifically a smart low-voltage distribution cabinet for power grids. Background Technology

[0002] Low-voltage switchgear is a critical terminal device in power distribution networks, widely used in residential areas, commercial areas, industrial parks, and other distribution areas. It undertakes important functions such as power distribution, circuit protection, and monitoring and control. Its performance directly affects power supply reliability, power quality, and operation and maintenance efficiency.

[0003] Currently, traditional low-voltage distribution cabinets in transformer substations mainly consist of basic components such as mechanical circuit breakers, contactors, and analog pointer instruments. Their functions are relatively simple, typically limited to basic on / off, overload, and short-circuit protection. With the deepening of smart grid and distribution network automation construction, and the increasing demand from users for high-quality and high-reliability electricity, traditional distribution cabinets have exposed many problems that urgently need to be solved. Summary of the Invention

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] This invention provides a smart low-voltage distribution cabinet for power grids, comprising a cabinet body, a power distribution module, a data acquisition module, and a sensor group connected to the power distribution module, all installed inside the cabinet body. A vibration damping adjustment device is provided at the bottom of the cabinet body. The vibration damping adjustment device includes a base shell, a sliding mass block, a drive assembly, and multiple layers of elastic support plates. The base shell is fixed to the bottom of the cabinet body by bolts and has an internal cavity. The sliding mass block is nested within the cavity and moves along the axial direction of the cavity. The drive assembly is located on one side of the base shell, and its output end is connected to the sliding mass block to control the position of the sliding mass block within the cavity. The multiple layers of elastic support plates are located between the base shell and the cabinet body, and adjacent elastic support plates are interlocked by a positioning structure.

[0006] Furthermore, guide protrusions are provided on both sides of the sliding mass block; a guide groove adapted to the guide protrusions is provided on the inner wall of the receiving cavity; the sliding mass block achieves stable sliding within the receiving cavity through the cooperation of the guide protrusions and the guide groove.

[0007] Furthermore, the drive assembly includes a lead screw, a knob handle, and a limiting cover plate; one end of the lead screw is threaded through the sliding mass block, and its axis is aligned with the extension direction of the guide groove; the limiting cover plate is fixedly connected to the outside of the base housing; the other end of the lead screw passes through the limiting cover plate and is coaxially connected to the knob handle.

[0008] Furthermore, a buffer spring is fitted on the lead screw between the sliding mass block and the limiting cover plate; one end of the buffer spring abuts against the surface of the sliding mass block, and the other end abuts against the inner side of the limiting cover plate.

[0009] Furthermore, one side of the multi-layer elastic support sheet is provided with several positioning posts, and the other side is provided with positioning holes that match the positioning posts; adjacent elastic support sheets are aligned by the cooperation of the positioning posts and positioning holes.

[0010] Furthermore, a state monitoring unit is provided between the power distribution module and the sensor group; the state monitoring unit includes a strain sensing ring, a conductive coating, a mounting bracket, and an ultrasonic testing probe; the sensor group is connected to the power distribution module via wires, and a metal connector is provided at the connection point of the wires; the strain sensing ring is disposed around the stress concentration area of ​​the metal connector and is fixed to the surface of the metal connector by the conductive coating; the ultrasonic testing probe is fixed to the side wall of the power distribution module by the mounting bracket, and its probe part is in contact with the surface of the metal connector.

[0011] Furthermore, an adaptive clamping mechanism is provided between the metal connector and the power distribution module; the adaptive clamping mechanism includes a locking rod, an arc-shaped spring, an insulating sleeve, and a locking nut; the locking rod passes through the metal connector, with one end inserted into the power distribution module and the other end threadedly connected to the locking nut; the insulating sleeve is fitted over the locking rod; one end of the arc-shaped spring abuts against the head of the locking rod, and the other end abuts against the inside of the insulating sleeve, transmitting pressure to the metal connector.

[0012] Furthermore, an anti-rotation rack is provided in the middle of the locking rod; the anti-rotation rack is evenly distributed along the axial direction of the locking rod; a through hole is provided at the end of the arc-shaped spring; the arc-shaped spring engages with the anti-rotation rack through the through hole.

[0013] Furthermore, an energy-absorbing bushing is fitted around the locking rod; a stop ring is provided at the end of the energy-absorbing bushing.

[0014] Furthermore, the inner wall of the energy-absorbing bushing is provided with a spiral groove, and the outer side of the cabinet is provided with a ventilation window.

[0015] The beneficial effects of this invention are as follows: This invention utilizes a vibration damping adjustment device and a drive assembly to adjust the position of the sliding mass block within the base housing cavity, thereby altering the relative distance between the sliding mass block and the power distribution module. Simultaneously, the superposition of multiple layers of elastic support plates changes the overall stiffness between the base housing and the cabinet. This optimizes the cabinet's vibration characteristics, preventing resonance caused by external micro-vibrations approaching the cabinet's natural frequency, reducing the likelihood of micro-cracks appearing in stress concentration areas of metal connectors, ensuring the connection stability between the sensor group and the power distribution module, and guaranteeing continuous data transmission. Furthermore, this device eliminates the need for frequent component replacements, reducing maintenance costs.

[0016] This invention employs a condition monitoring unit that uses strain sensors surrounding the stress concentration areas of the metal connector to monitor strain changes in real time. An ultrasonic testing probe, coupled with a coupling medium, adheres to the surface of the metal connector to detect potential micro-damage. Combined with a vibration damping adjustment device to avoid resonance, this unit can promptly detect micro-cracks caused by resonance or other factors, preventing further development of micro-damage that could lead to connector breakage. This improves the reliability of the power distribution module's connection to the conductors and extends the service life of the metal connector.

[0017] This invention employs an adaptive clamping mechanism, utilizing a locking rod that passes through the metal connector and is threadedly connected to a locking nut for fixation. An insulating sleeve is fitted over the locking rod for electrical isolation. Two arc-shaped spring pieces abut against the head of the locking rod and the inner side of the insulating sleeve, respectively, transmitting pressure. Simultaneously, an anti-rotation rack engages with the through-hole of the arc-shaped spring piece to prevent circumferential rotation. An energy-absorbing bushing and its helical groove absorb vibration and impact. These designs collectively enhance the tightness of the connection between the metal connector and the power distribution module, preventing loosening due to micro-vibrations, reducing fluctuations and noise interference in the sensor array output signal, lowering the risk of data distortion, and further enhancing the long-term stability of the power distribution module connection, thus meeting the requirements of continuous operation of the smart grid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the vibration damping adjustment device; Figure 3 This is a schematic diagram showing the fit between the sliding mass block and the guide groove; Figure 4 This is a magnified view of a portion of the condition monitoring unit; Figure 5 An exploded view of the adaptive clamping mechanism; Figure 6 This is a cross-sectional view of the energy-absorbing bushing; Figure 7 This is a schematic diagram of the superposition of multiple elastic support sheets.

[0019] Explanation of reference numerals in the attached drawings: 1. Cabinet; 2. Power distribution module; 3. Data acquisition module; 4. Vibration damping adjustment device; 5. Base shell; 6. Sliding mass block; 7. Drive assembly; 8. Multi-layer elastic support plate; 9. Guide protrusion; 10. Guide groove; 11. Lead screw; 12. Knob handle; 13. Limit cover plate; 14. Buffer spring; 15. Positioning column; 16. Positioning hole; 17. Status monitoring unit; 18. Strain sensing ring; 19. Ventilation window; 20. Ultrasonic detection probe; 21. Metal connector; 22. Adaptive clamping mechanism; 23. Locking rod; 24. Arc-shaped spring; 25. Insulating sleeve; 26. Locking nut; 27. Anti-rotation rack; 28. Energy-absorbing bushing; 29. ​​Spiral groove. Detailed Implementation

[0020] The invention will now be described in further detail with reference to the accompanying drawings.

[0021] This invention provides a smart low-voltage distribution cabinet for power grids. Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout relationship between the cabinet 1, the power distribution module 2, the data acquisition module 3, and the vibration damping and adjustment device 4. The cabinet 1 serves as the main frame of the entire device, and the power distribution module 2 and the data acquisition module 3 are installed inside. These modules are connected by wires to form a complete power distribution and monitoring system. The vibration damping and adjustment device 4 is located at the bottom of the cabinet 1 and is used to adjust the vibration transmission characteristics between the cabinet 1 and the ground, thereby optimizing the stability of the overall system.

[0022] The specific structure of the vibration damping adjustment device 4 is as follows: Figure 2 As shown, the system includes a base housing 5, a sliding mass block 6, a drive assembly 7, and multi-layer elastic support plates 8. The base housing 5 is bolted to the bottom of the cabinet 1 and has an internal cavity for accommodating the sliding mass block 6. The sliding mass block 6 is nested within the cavity and moves along its axial direction. Guide protrusions 9 are provided on both sides of the sliding mass block 6, and guide grooves 10 that fit the guide protrusions 9 are formed on the inner wall of the cavity. The sliding mass block 6 achieves stable sliding through the cooperation of the guide protrusions 9 and the guide grooves 10. Figure 3 As shown. This design ensures that the sliding mass block 6 will not shift or jam during movement, thereby improving the operational reliability of the vibration damping adjustment device 4.

[0023] A drive assembly 7 is located on one side of the base housing 5, and its output end is connected to the sliding mass block 6 to control the position of the sliding mass block 6 within the receiving cavity. The drive assembly 7 includes a lead screw 11, a knob handle 12, and a limiting cover plate 13. One end of the lead screw 11 is threaded through the sliding mass block 6, and its axis is aligned with the extension direction of the guide groove 10. The limiting cover plate 13 is fixedly connected to the outside of the base housing 5, and the other end of the lead screw 11 passes through the limiting cover plate 13 and is coaxially connected to the knob handle 12. By rotating the knob handle 12, the lead screw 11 can be rotated, thereby pushing the sliding mass block 6 to move along the guide groove 10. In addition, a buffer spring 14 is fitted on the lead screw 11 between the sliding mass block 6 and the limiting cover plate 13. One end of the buffer spring 14 abuts against the surface of the sliding mass block 6, and the other end abuts against the inner side of the limiting cover plate 13. The function of the buffer spring 14 is to provide a certain rebound force for the sliding mass block 6, preventing it from moving suddenly due to external impact, and at the same time, it can absorb some vibration energy to further improve the vibration reduction effect.

[0024] Multi-layer elastic support plates 8 are located between the base shell 5 and the cabinet 1. Adjacent elastic support plates are interlocked through a positioning structure, such as... Figure 7 As shown, the multi-layer elastic support sheet 8 has several positioning posts 15 on one side and positioning holes 16 that match the positioning posts 15 on the other side. Adjacent elastic support sheets are precisely aligned through the cooperation of the positioning posts 15 and the positioning holes 16. This design ensures that the multi-layer elastic support sheets 8 can maintain a neat arrangement when stacked, avoiding the problem of uneven stiffness caused by misalignment. The stacking thickness of the multi-layer elastic support sheets 8 can be adjusted according to actual needs, thereby changing the overall stiffness between the base shell 5 and the cabinet 1 to adapt to vibration conditions in different environments.

[0025] A status monitoring unit 17 is installed between the power distribution module 2 and the sensor group, such as... Figure 4 As shown. The condition monitoring unit 17 includes a strain sensing ring 18, a conductive coating, a mounting bracket, and an ultrasonic testing probe 20. The sensor group is connected to the power distribution module 2 via wires, with a metal connector 21 at the connection point of the wires. The strain sensing ring 18 is wound around the stress concentration area of ​​the metal connector 21 and fixed to the surface of the metal connector 21 by the conductive coating. The conductive coating enhances the adhesion between the strain sensing ring 18 and the metal connector 21 while ensuring the stability of signal transmission. The ultrasonic testing probe 20 is fixed to the side wall of the power distribution module 2 by the mounting bracket, and its piezoelectric crystal probe is attached to the surface of the metal connector 21 by means of a coupling medium. By emitting ultrasonic waves and receiving reflected signals, the ultrasonic testing probe 20 can detect whether there are microcracks or other potential defects on the surface of the metal connector 21, monitor the state changes of the metal connector 21 in real time, and promptly detect microscopic damage caused by resonance or other factors, thereby avoiding the occurrence of faults.

[0026] An adaptive clamping mechanism 22 is provided between the metal connector 21 and the power distribution module 2, such as... Figure 5 As shown. The adaptive clamping mechanism 22 includes a locking rod 23, an arc-shaped spring 24, an insulating sleeve 25, and a locking nut 26. The locking rod 23 passes through the metal connector 21, with one end inserted into the power distribution module 2 and the other end threadedly connected to the locking nut 26. The insulating sleeve 25 is fitted over the locking rod 23, providing electrical isolation and preventing current leakage through the locking rod 23. One end of the arc-shaped spring 24 abuts against the head of the locking rod 23, and the other end abuts against the inside of the insulating sleeve 25, transmitting pressure to the metal connector 21. This design ensures a tight connection between the metal connector 21 and the power distribution module 2, preventing loosening due to vibration. An anti-rotation rack 27 is provided in the middle of the locking rod 23, and the anti-rotation rack 27 is evenly distributed along the axial direction of the locking rod 23. The end of the arc-shaped spring 24 is provided with a through hole. The arc-shaped spring 24 meshes with the anti-rotation rack 27 through the through hole to prevent the arc-shaped spring 24 from rotating circumferentially, which further enhances the stability of the adaptive clamping mechanism 22 and avoids the arc-shaped spring 24 from shifting due to vibration.

[0027] An energy-absorbing bushing 28 is fitted around the locking rod 23. A stop ring is provided at the end of the energy-absorbing bushing 28 to limit its axial movement. A spiral groove 29 is formed on the inner wall of the energy-absorbing bushing 28. Figure 6 As shown. The spiral groove 29 provides deformation space for the energy-absorbing bushing 28, enabling it to undergo elastic deformation when subjected to vibration and impact, thereby absorbing part of the vibration energy, effectively reducing the impact of vibration on the metal connector 21, and extending its service life.

[0028] This invention achieves enhanced intelligence and stability of the low-voltage distribution cabinet through the aforementioned structural design. In practical applications, when external vibrations occur, the sliding mass block 6 in the vibration damping adjustment device 4 adjusts its position via the drive component 7, changing its relative distance to the cabinet 1, thereby optimizing the vibration characteristics of the cabinet 1. The stacked design of the multi-layer elastic support plates 8 further adjusts the overall stiffness between the cabinet 1 and the ground, preventing resonance. The status monitoring unit 17 monitors the status changes of the metal connector 21 in real time, and combined with data from the ultrasonic testing probe 20 and the strain sensing ring 18, can promptly detect potential microcracks or other defects. The adaptive clamping mechanism 22, through the synergistic action of the locking rod 23, the arc-shaped spring 24, and the energy-absorbing bushing 28, ensures a tight connection between the metal connector 21 and the power distribution module 2, preventing loosening or signal distortion due to vibration, thus jointly improving the operational reliability and intelligence level of the low-voltage distribution cabinet and meeting the needs of continuous operation of the smart grid.

[0029] To enable those skilled in the art to fully understand and implement this invention, the specific implementation principle of this invention will be further explained below in conjunction with a specific application scenario.

[0030] In the actual operation of smart distribution areas in the power grid, low-voltage switchgear needs to cope with complex external environmental vibrations while ensuring the stability and reliability of the power distribution and monitoring system. The following will explain how this invention achieves its technical effects through specific operating steps and principles.

[0031] First, during installation, the base housing 5 of the vibration damping adjustment device 4 is bolted to the bottom of the cabinet 1, forming the basic support structure of the entire device. Multi-layer elastic support plates 8 are located between the base housing 5 and the cabinet 1, and are precisely aligned through the engagement of positioning posts 15 and positioning holes 16, ensuring that the multi-layer elastic support plates 8 do not misalign when stacked, thus maintaining the uniformity of overall stiffness. Depending on the vibration conditions of the actual site environment, the stiffness value between the base housing 5 and the cabinet 1 can be changed by adjusting the stacking thickness of the multi-layer elastic support plates 8 to adapt to the needs under different vibration frequencies. For example, in a high-frequency vibration environment, increasing the number of elastic support plates can effectively improve the system's vibration resistance and prevent equipment damage or data distortion due to resonance.

[0032] Secondly, when external vibrations occur, the knob handle 12 in the drive assembly 7 is manually rotated, causing the lead screw 11 to rotate. The lead screw 11 pushes the sliding mass block 6 along the guide groove 10 through threaded transmission, thereby adjusting the position of the sliding mass block 6 within the receiving cavity. The movement of the sliding mass block 6 changes its relative distance to the cabinet 1, optimizing the vibration characteristics of the cabinet 1. The buffer spring 14 plays a crucial role in this process; it provides a restoring force to the sliding mass block 6, preventing it from moving suddenly due to external impacts, while also absorbing some vibration energy and reducing the impact of vibration on the cabinet 1. In this way, the vibration damping adjustment device 4 can effectively avoid resonance caused by the frequency of external micro-vibrations being close to the natural frequency of the cabinet 1, thereby protecting the stability of the internal equipment.

[0033] The condition monitoring unit 17 monitors the condition changes of the metal connector 21 in real time. A strain sensing ring 18 is wound around the stress concentration area of ​​the metal connector 21 and fixed to its surface by a conductive coating. When the metal connector 21 is subjected to vibration or stress changes, the strain sensing ring 18 can capture these changes and transmit the signals to the data acquisition module 3. The ultrasonic testing probe 20 emits ultrasonic waves through a piezoelectric crystal probe and receives signals reflected from the surface of the metal connector 21. By analyzing the reflected signals, it is possible to detect whether there are microcracks or other potential defects on the surface of the metal connector 21. For example, when the metal connector 21 suffers microscopic damage due to long-term vibration, the ultrasonic testing probe 20 can detect these defects in time, preventing them from further developing into fracture, thereby ensuring the reliability of the connection between the power distribution module 2 and the sensor group.

[0034] Furthermore, the adaptive clamping mechanism 22, through the coordinated action of the locking rod 23, the arc-shaped spring 24, and the energy-absorbing bushing 28, ensures a tight connection between the metal connector 21 and the power distribution module 2. The locking rod 23 passes through the metal connector 21 and is fixed by the locking nut 26. One end of the arc-shaped spring 24 abuts against the head of the locking rod 23, and the other end abuts against the inner side of the insulating sleeve 25, transmitting pressure to the metal connector 21. The anti-rotation rack 27 engages with the through hole of the arc-shaped spring 24 to prevent the arc-shaped spring 24 from rotating circumferentially, thereby enhancing the stability of the clamping mechanism. The inner wall of the energy-absorbing bushing 28 has a spiral groove 29. When subjected to vibration and impact, the energy-absorbing bushing 28 undergoes elastic deformation, absorbing part of the vibration energy and reducing the impact of vibration on the metal connector 21. This design not only avoids loosening caused by vibration but also reduces fluctuations and noise interference in the sensor group output signal, improving the accuracy of data transmission.

[0035] Finally, during actual operation, the data acquisition module 3 processes the signals collected by the status monitoring unit 17 and uploads them to the host computer or cloud platform via the communication interface. Maintenance personnel can view the real-time operating status of the low-voltage distribution cabinet through the remote monitoring system, including key parameters such as voltage, current, power, temperature, and circuit breaker status. For example, when the status monitoring unit 17 detects abnormal strain or micro-cracks in the metal connector 21, the system will immediately issue an early warning signal, reminding maintenance personnel to take appropriate measures. This proactive maintenance mode significantly shortens fault location time, reduces the scope of power outages, and improves power restoration speed, meeting the demands of modern power distribution networks for rapid response and self-healing capabilities.

[0036] Through the aforementioned structural design and operating principle, this invention achieves enhanced intelligence and stability of low-voltage distribution cabinets in practical application scenarios. The vibration damping and adjustment device 4 optimizes the vibration characteristics of the cabinet 1, the status monitoring unit 17 monitors the status changes of the metal connectors 21 in real time, and the adaptive clamping mechanism 22 ensures tightness of the connection. These designs collectively improve the operational reliability and intelligence level of the low-voltage distribution cabinet, meeting the requirements for continuous operation of the smart grid.

[0037] Through the specific embodiments described above, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A smart low-voltage distribution cabinet for power grids, comprising a cabinet (1), a power distribution module (2) installed inside the cabinet (1), a data acquisition module (3), and a sensor group connected to the power distribution module (2); characterized in that: The cabinet (1) is provided with a vibration damping adjustment device (4) at the bottom; the vibration damping adjustment device (4) includes a base shell (5), a sliding mass block (6), a drive assembly (7) and a multi-layer elastic support plate (8); the base shell (5) is fixed to the bottom of the cabinet (1) by bolts, and a receiving cavity is provided inside it; the sliding mass block (6) is nested in the receiving cavity and moves along the axial direction of the receiving cavity; the drive assembly (7) is located on one side of the base shell (5), and its output end is connected to the sliding mass block (6) to control the position of the sliding mass block (6) in the receiving cavity; the multi-layer elastic support plate (8) is located between the base shell (5) and the cabinet (1), and adjacent elastic support plates (8) are interlocked by a positioning structure.

2. The intelligent low-voltage distribution cabinet for power grids according to claim 1, characterized in that: The sliding mass block (6) is provided with guide protrusions (9) on both sides; the inner wall of the receiving cavity is provided with guide grooves (10) that are adapted to the guide protrusions (9); the sliding mass block (6) achieves stable sliding in the receiving cavity through the cooperation of the guide protrusions (9) and the guide grooves (10).

3. The intelligent low-voltage distribution cabinet for power grids according to claim 1, characterized in that: The drive assembly (7) includes a lead screw (11), a knob handle (12), and a limiting cover plate (13); one end of the lead screw (11) is threaded through the sliding mass block (6), and its axis is consistent with the extension direction of the guide groove (10); the limiting cover plate (13) is fixedly connected to the outside of the base housing (5); the other end of the lead screw (11) passes through the limiting cover plate (13) and is coaxially connected with the knob handle (12).

4. The intelligent low-voltage distribution cabinet for power grids according to claim 3, characterized in that: A buffer spring (14) is fitted on the lead screw (11) between the sliding mass block (6) and the limiting cover plate (13); one end of the buffer spring (14) abuts against the surface of the sliding mass block (6), and the other end abuts against the inside of the limiting cover plate (13).

5. A smart low-voltage distribution cabinet for power grids according to claim 1, characterized in that: The multi-layer elastic support sheet (8) has several positioning posts (15) on one side and positioning holes (16) matching the positioning posts (15) on the other side; adjacent elastic support sheets (8) are aligned by the cooperation of the positioning posts (15) and the positioning holes (16).

6. The intelligent low-voltage distribution cabinet for power grids according to claim 1, characterized in that: A status monitoring unit (17) is provided between the power distribution module (2) and the sensor group; the status monitoring unit (17) includes a strain sensing ring (18), a conductive coating, a mounting bracket, and an ultrasonic testing probe (20); the sensor group is connected to the power distribution module (2) through wires, and a metal connector (21) is provided at the connection point of the wires; the strain sensing ring (18) is wrapped around the stress concentration area of ​​the metal connector (21) and fixed to the surface of the metal connector (21) through the conductive coating; the ultrasonic testing probe (20) is fixed to the side wall of the power distribution module (2) through the mounting bracket, and its probe part is in contact with the surface of the metal connector (21).

7. A smart low-voltage distribution cabinet for power grids according to claim 6, characterized in that: An adaptive clamping mechanism (22) is provided between the metal connector (21) and the power distribution module (2); the adaptive clamping mechanism (22) includes a locking rod (23), an arc-shaped spring (24), an insulating sleeve (25), and a locking nut (26); the locking rod (23) passes through the metal connector (21), one end of which is inserted into the power distribution module (2), and the other end is threaded to the locking nut (26); the insulating sleeve (25) is fitted onto the outside of the locking rod (23); one end of the arc-shaped spring (24) abuts against the head of the locking rod (23), and the other end abuts against the inside of the insulating sleeve (25), and transmits pressure to the metal connector (21).

8. A smart low-voltage distribution cabinet for power grids according to claim 7, characterized in that: The locking rod (23) is provided with an anti-rotation rack (27) in the middle; the anti-rotation rack (27) is evenly distributed along the axial direction of the locking rod (23); the end of the arc-shaped spring (24) is provided with a through hole; the arc-shaped spring (24) meshes with the anti-rotation rack (27) through the through hole.

9. A smart low-voltage distribution cabinet for power grids according to claim 7, characterized in that: The locking rod (23) is fitted with an energy-absorbing bushing (28); the end of the energy-absorbing bushing (28) is provided with a stop ring.

10. A smart low-voltage distribution cabinet for power grids according to claim 9, characterized in that: The inner wall of the energy-absorbing bushing (28) is provided with a spiral groove (29), and the outer side of the cabinet (1) is provided with a ventilation window (19).

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