Modular combined power distribution cabinet

Abstract

The invention is applied to the technical field of power distribution cabinets, and discloses a modular combined power distribution cabinet which comprises a power distribution cabinet body, a power distribution control module is arranged in the power distribution cabinet body, and a combined mechanism is arranged in the power distribution cabinet body. The stability and good heat dissipation of the power distribution control module are ensured by limiting the power distribution control module after the power distribution control module is inserted. According to the modular combined power distribution cabinet, a mode that the power distribution control module is inserted into the combined frame and the extension mounting frame in advance and then is mounted with the power distribution cabinet body is adopted, so that a larger operation space can be provided during mounting, and poor stability caused by incapability of mounting in place in a mounting process due to limited internal space of the power distribution cabinet body is avoided; after the power distribution control module is installed through the combined frame and the extension installation frame, cooling air is blown to the power distribution control module through the cooling pipe and the air spraying holes, it is guaranteed that the power distribution control module can be sufficiently cooled in the working process, and therefore stable and normal work of the power distribution cabinet is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a modular combined power distribution cabinet. Background Art

[0002] In today's electrical equipment field, modular combination distribution cabinets are widely used due to their flexibility and scalability. In today's power distribution and management field, distribution cabinets, as key equipment, play a vital role. With the continuous growth of power demand and the increasing complexity of power systems, higher requirements are placed on the performance, flexibility and scalability of distribution cabinets. Traditional distribution cabinets usually adopt fixed structures and layouts, which to a certain extent limit their ability to adapt to different power configurations and space requirements. With the advancement of technology and the diversification of application scenarios, modular combination distribution cabinets have come into being. First, the continuous updating and upgrading of electrical equipment requires distribution cabinets to have better compatibility and be able to easily accommodate new electrical components and control devices. Secondly, modern industrial and commercial environments have extremely high requirements for the reliability and stability of power systems. In order to facilitate maintenance and troubleshooting, the structure of the distribution cabinet needs to be more reasonable and easy to operate. Moreover, in terms of space utilization, In terms of use, different places have different space restrictions and layout requirements. Modular combination distribution cabinets can be flexibly combined and installed according to the actual space to maximize space utilization. However, the existing modular combination distribution cabinets still have some significant shortcomings in actual use. In terms of installation stability, the existing distribution cabinet structure design is often not reasonable enough, resulting in deformation of the distribution cabinet body and loosening of connectors when subjected to external vibration, impact or uneven force. This not only affects the normal operation of the distribution cabinet, but may also cause electrical failures and even endanger the safety of operators. In addition, when inserting and removing module components, insufficient safety protection is also a prominent problem. Due to the lack of effective protection mechanisms and guiding structures, operators may accidentally touch live parts when performing insertion or removal operations, causing electric shock accidents. At the same time, improper plugging and unplugging operations may also cause damage to module components, increasing equipment maintenance costs and repair difficulties. Summary of the invention

[0003] The object of the present invention is to provide a modular combined power distribution cabinet to solve the problem of insufficient safety protection when inserting and removing module components proposed in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a modular combined power distribution cabinet, comprising a power distribution cabinet body, a rotating inspection door is installed on the outer surface of one side of the power distribution cabinet body, and a back panel is fixedly installed on the outer surface of the other side of the power distribution cabinet body by bolts, a power distribution control module is arranged inside the power distribution cabinet body, and a combination mechanism is arranged inside the power distribution cabinet body, and the stability and good heat dissipation of the power distribution control module are ensured by limiting the position of the power distribution control module after insertion.

[0005] Preferably, the combination mechanism includes: a combination frame, which is slidably installed inside the distribution cabinet body, and an extension mounting frame is arranged on one side of the combination frame, and the combination frame and the extension mounting frame are fixedly connected through a cooling pipe, the outer surface of the cooling pipe is evenly provided with jet holes, and a diversion cavity is arranged inside the side surface of the extension mounting frame, a limit frame is fixedly provided on the side surface of the distribution control module, a sliding limit rod is installed on the side surface of the extension mounting frame, and a connecting rope is connected between two adjacent limit rods, an injection joint is fixedly provided on the lower side surface of the extension mounting frame, an air pump is fixedly installed inside the distribution cabinet body, a plug-in board is fixedly provided on the upper outer surface of the extension mounting frame, a sliding plug-in rod and a piston rod are installed inside the distribution cabinet body above the plug-in board, and a pulling plate is fixedly provided on one end of the piston rod.

[0006] By adopting the above technical solution, the power distribution control module, the combination frame and the extension mounting frame can be stably installed on the power distribution cabinet body.

[0007] Preferably, the combination frame is installed in a snap-fitting manner with the power distribution control module, the diverter chamber is connected to the cooling pipe, and the lower end of the diverter chamber is connected to the injection joint, and the injection joint is connected to the air pump through a hose, the upper end of the limit rod is designed as a slope, and a spring is connected between the limit rod and the extension mounting frame.

[0008] By adopting the above technical solution, the limiting rod can achieve stable limiting of the power distribution control module and the extension mounting frame by engaging with the limiting frame.

[0009] Preferably, the plug plate and the plug rod are installed in a snap-fitting manner, and the plug rod, the piston rod and the distribution cabinet body are all connected by sliding friction, the pulling plate is fixedly installed on the end of the piston rod located outside the distribution cabinet body, and a spring is connected between the pulling plate and the distribution cabinet body, and a columnar protrusion is fixedly provided on the outer surface of the distribution cabinet body facing the pulling plate, and the columnar protrusion on the outer surface of the distribution cabinet body is in contact with the outer surface of the pulling plate.

[0010] By adopting the above technical solution, the sliding of the piston rod can drive the plug rod to slide through pressure, so as to achieve the purpose of disengaging the plug rod from the plug board.

[0011] Preferably, a power supply protection structure is provided on the side surface of one end of the power distribution cabinet body where the backplane is located, and the plugging safety between the power distribution cabinet and the external cables is ensured by detecting the installation status of the power distribution control module.

[0012] By adopting the above technical solution, the external plug cannot be plugged into the docking socket when the power distribution control module is not fully installed, thereby avoiding damage to the power distribution control module that is not fully installed.

[0013] Preferably, the power supply protection structure includes: a docking socket, which is fixedly arranged inside the side surface of the distribution cabinet body, and an external plug is inserted into the end of the docking socket facing the outside of the distribution cabinet body, and a connecting plug is inserted into the end of the docking socket facing the inside of the distribution cabinet body, a fixed connector is fixedly arranged on the outer surface of one end of the power distribution control module, a toggle gear rod is fixedly arranged on the lower surface of the extension mounting frame, a rotating transmission gear is installed inside the distribution cabinet body, a sliding displacement rod is installed inside the side surface of the distribution cabinet body, and one end of the displacement rod is fixedly connected to a piston plate, a sliding closed baffle is installed inside the side surface of the distribution cabinet body, and a yield groove is provided on the side surface of the distribution cabinet body where the closed baffle is located.

[0014] By adopting the above technical solution, the closed baffle plate can shield the clearance groove to prevent the insertion of the external plug.

[0015] Preferably, two ends of the docking socket are respectively engaged with an external plug and a connecting plug, and the connecting plug is electrically connected to a fixed connector via a wire.

[0016] By adopting the above technical solution, the docking socket can electrically connect the external plug and the fixed connector.

[0017] Preferably, a tooth block is provided on the lower surface of the shifting gear rod, and the shifting gear rod is meshedly connected with the transmission gear through the tooth block.

[0018] By adopting the above technical solution, when the extension mounting frame slides into the cabinet body of the power distribution cabinet, the transmission gear is driven to rotate by toggling the gear rod, so as to achieve the purpose of sliding the closed baffle downward.

[0019] Preferably, the displacement rod is threadedly connected to one end of the transmission gear, and the piston plate is slidingly and frictionally connected to the cabinet body of the power distribution cabinet.

[0020] By adopting the above technical solution, the piston plate can drive the closed baffle to slide by pressure during the sliding process.

[0021] Preferably, the closed baffle is connected to the distribution cabinet body by sliding friction, and a spring is connected between the closed baffle and the distribution cabinet body, and the cavity of the distribution cabinet body where the closed baffle is located is connected to the cavity of the distribution cabinet body where the piston plate is located, and the upper end of the closed baffle passes through the inner surface of the lower end of the make way groove, and the make way groove is arranged opposite to the docking socket.

[0022] By adopting the above technical solution, the closed baffle can automatically slide down when the power distribution control module is installed to achieve the purpose of exposing the clearance groove.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the modular combined power distribution cabinet: 1. The power distribution control module is pre-inserted into the combination frame and the extension mounting frame before being installed with the power distribution cabinet, so that a larger operating space can be provided during installation, avoiding the poor stability caused by the inability to install it in place during the installation process due to the limited internal space of the power distribution cabinet; Furthermore, after the power distribution control module is installed by the combined frame and the extended mounting frame, cooling air is blown to the power distribution control module through the cooling pipe and the air jet hole, thereby ensuring that the power distribution control module can obtain sufficient cooling during operation, thereby ensuring stable and normal operation of the power distribution cabinet; Furthermore, by inserting the combined frame and the extended mounting frame into the inside of the power distribution cabinet after the power distribution control module is inserted, the power distribution control module, the combined frame and the extended mounting frame are stably installed inside the power distribution cabinet, and the power distribution control module installation will not fail due to the vibration generated in the power distribution cabinet working room, thereby ensuring the stable operation of the power distribution cabinet; 2. Use a closed baffle to cover the clearance slot when the power distribution control module is not installed in place, so as to ensure that the power distribution cabinet cannot be connected to the external plug when the power distribution control module is not installed in place, thereby avoiding damage to the power distribution control module due to mismatch; Furthermore, by moving the gear rod to drive the transmission gear to rotate when the power distribution control module is installed in place, the closed baffle can automatically drop after all the power distribution control modules are installed in place, so as to facilitate the stable insertion of the external plug into the make way slot and docking with the docking socket, thereby ensuring the power supply stability of the distribution cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the power distribution cabinet body, inspection door and back panel connected in the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the power distribution cabinet body, the power distribution control module and the combined frame connected to the present invention; Figure 4This is a schematic diagram of a three-dimensional structure of a power distribution control module connected to a fixed connector of the present invention; Figure 5 It is a three-dimensional structural diagram of the cross-section surface of the docking socket, the external plug and the connecting plug of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the connection between the extended mounting frame and the injection joint of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the cross-section surface of the connection between the extended mounting frame and the shifting gear rod of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the combined frame, the extended mounting frame, the cooling pipe and the air injection hole connection section of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the connection section of the plug rod, the piston rod and the pulling plate of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the cross-section surface connecting the extended mounting frame and the diversion cavity of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the combined frame, the extended mounting frame and the cooling pipe connection of the present invention.

[0025] In the figure: 1. distribution cabinet body; 2. inspection door; 3. back plate; 4. distribution control module; 5. combination frame; 6. extension mounting frame; 7. cooling pipe; 8. jet hole; 9. diversion chamber; 10. limit frame; 11. limit rod; 12. connecting rope; 13. injection joint; 14. air pump; 15. plug board; 16. plug rod; 17. piston rod; 18. pulling plate; 19. docking socket; 20. external plug; 21. connecting plug; 22. fixed connector; 23. toggle gear rod; 24. transmission gear; 25. displacement rod; 26. piston plate; 27. closing baffle; 28. clearance groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 11 The present invention provides a technical solution: a modular combined power distribution cabinet.

[0028] Embodiment 1: This embodiment discloses a power distribution cabinet body 1, a rotating inspection door 2 is installed on the outer surface of one side of the power distribution cabinet body 1, and a back plate 3 is fixedly installed on the outer surface of the other side of the power distribution cabinet body 1 by bolts, a power distribution control module 4 is arranged inside the power distribution cabinet body 1, and a combination mechanism is arranged inside the power distribution cabinet body 1, and the stability and good heat dissipation of the power distribution control module 4 are ensured by limiting the position of the power distribution control module 4 after insertion; The combined mechanism includes: a combined frame 5, the combined frame 5 is slidably mounted inside the distribution cabinet body 1, and an extension mounting frame 6 is arranged on one side of the combined frame 5, and the combined frame 5 and the extension mounting frame 6 are fixedly connected through a cooling pipe 7, the outer surface of the cooling pipe 7 is evenly provided with jet holes 8, and a shunt cavity 9 is arranged inside the side surface of the extension mounting frame 6, a limit frame 10 is fixedly arranged on the side surface of the distribution control module 4, a sliding limit rod 11 is installed on the side surface of the extension mounting frame 6, and a connecting rope 12 is connected between two adjacent limit rods 11, an injection joint 13 is fixedly arranged on the lower side surface of the extension mounting frame 6, an air pump 14 is fixedly installed inside the distribution cabinet body 1, a plug-in board 15 is fixedly arranged on the upper outer surface of the extension mounting frame 6, a sliding plug-in rod 16 and a piston rod 17 are installed inside the distribution cabinet body 1 above the plug-in board 15, and a pulling plate 18 is fixedly arranged at one end of the piston rod 17; The assembly frame 5 is mounted in engagement with the power distribution control module 4, the shunt chamber 9 is connected to the cooling pipe 7, and the lower end of the shunt chamber 9 is connected to the injection joint 13, and the injection joint 13 is connected to the air pump 14 through a hose, the upper end of the limit rod 11 is designed as an inclined surface, and a spring is connected between the limit rod 11 and the extension mounting frame 6; The plug board 15 is installed in a snap-fit ​​manner with the plug rod 16, and the plug rod 16 and the piston rod 17 are all connected to the power distribution cabinet body 1 by sliding friction. The pulling plate 18 is fixedly installed at one end of the piston rod 17 located outside the power distribution cabinet body 1, and a spring is connected between the pulling plate 18 and the power distribution cabinet body 1. A columnar protrusion is fixedly provided on the outer surface of the power distribution cabinet body 1 facing the pulling plate 18, and the columnar protrusion on the outer surface of the power distribution cabinet body 1 is in contact with the outer surface of the pulling plate 18; When installing the power distribution control module 4, first open the back panel 3, then pull out the combination frame 5 and the extension mounting frame 6, and then align the power distribution control module 4 with the extension mounting frame 6 and insert it until the limit frame 10 on the side surface of the power distribution control module 4 squeezes the inclined surface of the upper end of the limit rod 11 so that the limit rod 11 slides through the limit frame 10, until the vertical surface of the limit rod 11 fits with the outer surface of the limit frame 10, so as to achieve the purpose of limiting the relative position between the power distribution control module 4 and the extension mounting frame 6, and then push the extension mounting frame 6 as a whole into the power distribution cabinet body 1, and pull the pulling plate 18 during the process so that the piston rod 17 drives the plug-in rod 16 to slide up through the extension mounting frame 6 through the gas pressure until the plug-in board 1 5 moves to the right below the plug rod 16. At this time, the pulling plate 18 drives the piston rod 17 to slide under the drive of the spring between the distribution cabinet body 1. The piston rod 17 pushes the plug rod 16 down through pressure to plug and engage with the plug plate 15, completing the limited installation of the combination frame 5 and the extension mounting frame 6 with the distribution cabinet body 1. When the distribution control module 4 needs to be removed, the connecting rope 12 is pulled to make the limit rod 11 slide out of contact with the limit frame 10, so that the distribution control module 4 can be pulled out and disconnected from the extension mounting frame 6. After the installation is completed, the injection joint 13 is connected to the output end of the air pump 14 through a hose, and then the inspection door 2 and the back panel 3 are closed to complete the closure of the distribution cabinet body 1; During operation, the air pump 14 is started, and the air pump 14 injects external air into the diversion cavity 9 through the injection joint 13. After the cooling air is injected into the diversion cavity 9, it is blown toward the power distribution control module 4 through the cooling pipe 7 and the air jet hole 8 for heat dissipation and cooling.

[0029] Embodiment 2: Based on Embodiment 1, this embodiment discloses that a power supply protection structure is provided on one side surface of the power distribution cabinet body 1 where the backplane 3 is located, and the plugging safety between the power distribution cabinet and the external cables is ensured by detecting the installation status of the power distribution control module 4; The power supply protection structure includes: a docking socket 19, the docking socket 19 is fixedly arranged inside the side surface of the distribution cabinet body 1, and an external plug 20 is inserted into the end of the docking socket 19 facing the outside of the distribution cabinet body 1, and a connection plug 21 is inserted into the end of the docking socket 19 facing the inside of the distribution cabinet body 1, a fixed connector 22 is fixedly arranged on the outer surface of one end of the distribution control module 4, a toggle gear rod 23 is fixedly arranged on the lower surface of the extension mounting frame 6, a rotating transmission gear 24 is installed inside the distribution cabinet body 1, a sliding displacement rod 25 is installed inside the side surface of the distribution cabinet body 1, and one end of the displacement rod 25 is fixedly connected to a piston plate 26, a sliding closed baffle 27 is installed inside the side surface of the distribution cabinet body 1, and a clearance groove 28 is opened on the side surface of the distribution cabinet body 1 where the closed baffle 27 is located; The two ends of the docking socket 19 are respectively engaged with the external plug 20 and the connecting plug 21, and the connecting plug 21 is electrically connected to the fixed connector 22 through a wire; The lower surface of the shifting gear rod 23 is provided with a tooth block, and the shifting gear rod 23 is meshed and connected with the transmission gear 24 through the tooth block; The displacement rod 25 is threadedly connected to one end of the transmission gear 24, and the piston plate 26 is frictionally connected to the cabinet body 1 of the power distribution cabinet; The closed baffle 27 is connected to the cabinet body 1 of the power distribution cabinet by sliding friction, and a spring is connected between the closed baffle 27 and the cabinet body 1 of the power distribution cabinet, and the cavity of the cabinet body 1 of the power distribution cabinet where the closed baffle 27 is located is connected to the cavity of the cabinet body 1 of the power distribution cabinet where the piston plate 26 is located, and the upper end of the closed baffle 27 passes through the inner surface of the lower end of the clearance groove 28, and the clearance groove 28 is arranged opposite to the docking socket 19; After the extension mounting frame 6 is inserted into the distribution cabinet body 1, the extension mounting frame 6 drives the transmission gear 24 to rotate by toggling the gear rod 23, so that the transmission gear 24 can drive the piston plate 26 to slide through the threaded connection with the displacement rod 25, and the piston plate 26 drives the closed baffle 27 to slide down through pressure. When all the extension mounting frames 6 are inserted into place, the closed baffle 27 slides down and completely makes way for the make way groove 28 to ensure that the external plug 20 can be accurately docked with the docking socket 19, and then the fixed connector 22 is docked with the other end of the docking socket 19 through the connecting plug 21 to complete the installation of the distribution control module 4 and the power supply of the distribution cabinet.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular combined power distribution cabinet, comprising a power distribution cabinet body (1), a rotatable inspection door (2) being installed on one side of the outer surface of the power distribution cabinet body (1), and a back plate (3) being fixedly installed on the other side of the outer surface of the power distribution cabinet body (1) by bolts, characterized in that: A power distribution control module (4) is arranged inside the power distribution cabinet body (1), and a combination mechanism is arranged inside the power distribution cabinet body (1), and stability and good heat dissipation of the power distribution control module (4) are ensured by limiting the position of the power distribution control module (4) after insertion; The combined mechanism comprises: a combined frame (5), the combined frame (5) being slidably mounted inside a power distribution cabinet body (1), and an extension mounting frame (6) being arranged on one side of the combined frame (5), and the combined frame (5) and the extension mounting frame (6) being fixedly connected via a cooling pipe (7), the outer surface of the cooling pipe (7) being evenly provided with jet holes (8), a shunt cavity (9) being arranged inside a side surface of the extension mounting frame (6), a limit frame (10) being fixedly arranged on a side surface of the power distribution control module (4), and the side surface of the extension mounting frame (6) being provided with a There is a sliding limit rod (11), and a connecting rope (12) is connected between two adjacent limit rods (11); an injection joint (13) is fixedly provided on the lower side surface of the extension mounting frame (6); an air pump (14) is fixedly provided inside the power distribution cabinet body (1); a plug-in board (15) is fixedly provided on the upper outer side surface of the extension mounting frame (6); a sliding plug-in rod (16) and a piston rod (17) are installed inside the power distribution cabinet body (1) above the plug-in board (15), and a pulling plate (18) is fixedly provided at one end of the piston rod (17); The assembly frame (5) is mounted in engagement with the power distribution control module (4), the flow diversion chamber (9) is connected to the cooling pipe (7), the lower end of the flow diversion chamber (9) is connected to the injection joint (13), and the injection joint (13) is connected to the air pump (14) via a hose, the upper end of the limit rod (11) is designed as an inclined surface, and a spring is connected between the limit rod (11) and the extension mounting frame (6); The plug plate (15) is mounted in a snap-fit ​​manner with the plug rod (16), and the plug rod (16) and the piston rod (17) are all connected to the distribution cabinet body (1) by sliding friction. The pulling plate (18) is fixedly mounted on one end of the piston rod (17) located outside the distribution cabinet body (1), and a spring is connected between the pulling plate (18) and the distribution cabinet body (1). A columnar protrusion is fixedly provided on the outer surface of the distribution cabinet body (1) facing the pulling plate (18), and the columnar protrusion on the outer surface of the distribution cabinet body (1) is in contact with the outer surface of the pulling plate (18).

2. A modular combined power distribution cabinet according to claim 1, characterized in that: A power protection structure is provided on one side surface of the power distribution cabinet body (1) where the back panel (3) is located, and the plugging safety between the power distribution cabinet and external cables is ensured by detecting the installation status of the power distribution control module (4).

3. A modular combined power distribution cabinet according to claim 2, characterized in that: The power supply protection structure comprises: a docking socket (19), the docking socket (19) being fixedly arranged inside a side surface of a power distribution cabinet body (1), and an end of the docking socket (19) facing outside the power distribution cabinet body (1) being plugged with an external plug (20), and an end of the docking socket (19) facing inside the power distribution cabinet body (1) being plugged with a connection plug (21), an outer surface of one end of the power distribution control module (4) being fixedly arranged with a fixed connector (22), and the extension mounting frame (6) A toggle gear rod (23) is fixedly arranged on the lower surface of the cabinet body (1), a rotating transmission gear (24) is installed inside the cabinet body (1), a sliding displacement rod (25) is installed inside the side surface of the cabinet body (1), and one end of the displacement rod (25) is fixedly connected to a piston plate (26), a sliding closed baffle (27) is installed inside the side surface of the cabinet body (1), and a clearance groove (28) is opened on the side surface of the cabinet body (1) where the closed baffle (27) is located.

4. A modular combined power distribution cabinet according to claim 3, characterized in that: The two ends of the docking socket (19) are respectively engaged with an external plug (20) and a connecting plug (21), and the connecting plug (21) is electrically connected to a fixed connector (22) via a wire.

5. The modular combined power distribution cabinet according to claim 3, characterized in that: A tooth block is provided on the lower surface of the shifting gear rod (23), and the shifting gear rod (23) is meshedly connected with the transmission gear (24) via the tooth block.

6. The modular combined power distribution cabinet according to claim 3, characterized in that: The displacement rod (25) is threadedly connected to one end of the transmission gear (24), and the piston plate (26) is slidingly and frictionally connected to the power distribution cabinet body (1).

7. The modular combined power distribution cabinet according to claim 3, characterized in that: The closed baffle (27) is connected to the power distribution cabinet body (1) by sliding friction, and a spring is connected between the closed baffle (27) and the power distribution cabinet body (1), and the cavity of the power distribution cabinet body (1) where the closed baffle (27) is located is connected to the cavity of the power distribution cabinet body (1) where the piston plate (26) is located, and the upper end of the closed baffle (27) passes through the inner surface of the lower end of the clearance groove (28), and the clearance groove (28) is arranged opposite to the docking socket (19).

Images