Modular expandable ring main unit

Abstract

The application belongs to the technical field of ring main unit, and particularly relates to a modular expandable ring main unit, which comprises an original cabinet, a cable well fixedly installed at the bottom of the original cabinet, an expansion cabinet fixedly installed at one side of the original cabinet, a supporting part fixedly connected to one side of the original cabinet and comprising a sleeve frame and a lower inserting rod for supporting the expansion cabinet, an isolation part fixedly connected to the inside of the expansion cabinet and comprising a rotating door, a top plate, a bottom plate and an upper inserting rod, when the supporting force of the sleeve frame on the expansion cabinet decreases, the upper inserting rod moves downward and locks and limits the rotating door, a plug-in part movably connected above the isolation part and comprising a sliding plate and a plug, when the expansion cabinet inclines, the sliding plate moves to drive the plug to move and separate from plug-in fixation, and the expansion cabinet is modularly expanded with the original cabinet through a connecting frame, so that the electrical equipment can be conveniently increased in an outdoor environment, and the normal ventilation effect of the original cabinet and the expansion cabinet is ensured in the splicing process through the splicing of the side door and the butt joint door.

Description

Technical Field

[0001] This invention belongs to the field of ring main unit technology, specifically a modular and expandable ring main unit. Background Technology

[0002] A ring main unit (RNB) is an electrical device consisting of a group of power transmission and distribution equipment (high-voltage switchgear) housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. It is widely used in urban power supply systems, industrial parks, commercial buildings, and various distribution network nodes. With the acceleration of urbanization and the large-scale integration of renewable energy, the distribution network is undergoing a structural transformation from unidirectional power supply to multi-faceted interactive power supply. As a core device at the end of the power grid, the RNB faces the dual challenges of functional reconfiguration and performance improvement.

[0003] Chinese invention patent 202311324086.9 discloses an expandable ring main unit, including a ring main unit cabinet and an internally arranged movable expansion mechanism. The ring main unit cabinet has a rear upright plate arranged vertically inside and along the X-axis direction. A lifting plate is arranged vertically on the front surface of the rear upright plate, and side upright plates are arranged vertically at both ends of the rear upright plate.

[0004] Chinese invention patent 202411182846.1 relates to the field of ring main unit technology, and in particular to a modular intelligent environmentally friendly gas ring main unit, including a base, a supporting hollow bottom plate and a cabinet body, etc.; the base is connected to the supporting hollow bottom plate.

[0005] The internal space of the aforementioned ring main unit is limited, so it is not possible to directly add extra electrical equipment inside the ring main unit. In actual expansion, it is necessary to replace the ring main unit and increase the difficulty of expansion. After expanding the original unit with an expansion cabinet, non-operating personnel or animals can directly enter the original unit through the expansion cabinet, thereby reducing the safety of the original unit. Furthermore, it is difficult for operators to move and maintain the original unit laterally. At the same time, the expansion cabinet will also block the side of the original unit, affecting the normal heat dissipation inside the original unit.

[0006] Meanwhile, in outdoor use scenarios, the ground may experience varying degrees of subsidence or elevation. Although the expansion cabinet may not tilt, the supporting force of the frame on the ring main unit changes accordingly. If operators directly enter the expansion cabinet for maintenance, the ring main unit will experience changes in stress and may easily tilt and collapse. When the expansion cabinet tilts after prolonged use, the female and female power strips remain electrically connected. Therefore, the female power strip will pull the female power strip, causing it to bend and tilt, and may even cause the original cabinet to tip over and break the circuit, resulting in major safety accidents. Summary of the Invention

[0007] To address the above problems, this invention provides a modular and scalable ring main unit.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a modular expandable ring main unit, comprising an original cabinet and a cable well fixedly installed at the bottom of the original cabinet, an expansion cabinet fixedly installed on one side of the original cabinet, and further comprising: The support unit, which is fixedly connected to one side of the original cabinet, includes a frame and a lower insert rod, and is used to support the expansion cabinet; The isolation section, which is fixedly connected inside the expansion cabinet, includes a rotating door, a top plate, a bottom plate, and an upper insertion rod. When the supporting force of the frame on the expansion cabinet decreases, the upper insertion rod moves downward and locks the rotating door to a limit. The plug-in section, which is movably connected above the isolation section, includes a slide plate and a plug. When the expansion cabinet is tilted, the slide plate moves, causing the plug to move and disengage from the plug-in fixation.

[0009] Preferably, the original cabinet has a side door on one side and the expansion cabinet has a docking door on one side. The side door and the docking door are fixed together by a connecting frame. A female power strip is fixedly installed inside the original cabinet and a female power strip is fixedly installed inside the expansion cabinet. The female power strip and the female power strip are fixedly connected by a plug-in part.

[0010] Preferably, the support portion further includes: The support rod is fixed to the side wall of the cable well by inserting its end, and the frame is fixedly installed inside the support rod and on the outer surface of the support rod. Multiple sets of support rods and frames are evenly arranged and correspond to the bottom of the expansion cabinet. The elastic pad is fixedly connected to the top of the frame at its bottom and elastically contacts the bottom of the expansion cabinet at its top, providing elastic support for the bottom of the expansion cabinet.

[0011] Preferably, the isolation section further includes: The frame is symmetrically arranged inside the expansion cabinet. The ends of the two frames near the docking door are rotatably connected to the side wall of the rotating door. The distance between the two frames matches the length of the two rotating doors. The top plate is fixedly connected to the top of the frame, and a limit hole is opened inside the top plate. The bottom plate is fixedly connected to the bottom of the frame. The other end of the top plate and the bottom plate are respectively aligned with the inner wall of the side door to support and connect the original cabinet and the extension cabinet.

[0012] Preferably, the isolation section further includes: The lock hole is located inside the base plate, and multiple lock holes are provided. The upper insertion rod is inserted into the lock hole and locks the door to a limit position. Positioning holes are evenly distributed at the bottom of the revolving door, and the lock holes correspond to the positioning holes. A reset component is fixedly connected to the top of each positioning hole, and the bottom of the reset component abuts against the top of the upper insertion rod.

[0013] Preferably, the bottom of the lower insert rod contacts the top of the sleeve frame, the upper insert rod and the lower insert rod abut against each other and both match the lock hole, the top of the lower insert rod passes through the bottom of the expansion cabinet and is movably connected inside the lock hole, and when the sleeve frame tilts downward, it drives the lower insert rod to move downward along the lock hole.

[0014] Preferably, the plug-in unit further includes: The blocking component is movably connected inside the limiting hole, and the top of the blocking component is fixedly connected to the bottom of the slide plate. The blocking component limits and blocks the rotating door. When the rotating door rotates away from the side door, the rotating door drives the blocking component to move away from the side door. The bottom of the skateboard is slidably connected to the top of the top plate, the bottom of the plug is fixedly connected to the top of the skateboard, and the width of the skateboard is greater than the width of the blocking component.

[0015] Preferably, one end of the sub-socket is fixedly connected to a flexible part, the other end of the flexible part is fixedly connected to the side wall of the plug, and the other end of the plug is inserted and fixed to the end of the female socket. The flexible part is flexible and its length is greater than the distance between the female socket and the sub-socket. When the slide moves away from the side door end, it drives the plug to move and causes it to disengage from the female socket.

[0016] Preferably, multiple sets of support members are evenly arranged at the bottom of the frame and the bottom of the expansion cabinet. The bottom of the support members is inserted and fixed to the ground. The support members are used to adjust the support height of the frame and the expansion cabinet.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, by setting up components such as expansion cabinets and connecting frames to cooperate with each other, the expansion cabinet can achieve modular expansion with the original cabinet through the connecting frame, thereby facilitating the addition of electrical equipment in outdoor environments. Furthermore, during the splicing process, the splicing of side doors and connecting doors ensures the normal ventilation effect of the original cabinet and the expansion cabinet.

[0018] 2. In this invention, by setting up the cooperation of components such as the frame and the rotating door, the rotating door is normally closed, which effectively prevents non-operating personnel or animals from entering the original cabinet through the expansion cabinet. When the operator needs to repair the original cabinet, the rotating door is opened to connect the expansion cabinet and the original cabinet, preventing the operator from touching the female and female power strips and facilitating the operator's movement inside the expansion cabinet.

[0019] 3. In this invention, by setting up components such as the sleeve frame and the support member to cooperate with each other, the support member supports and limits the bottom of the sleeve frame and the expansion cabinet, while the sleeve frame is located below the side door and provides elastic support to the bottom of the expansion cabinet, which effectively improves the installation stability and support of the expansion cabinet.

[0020] 4. In this invention, by setting up the cooperation of components such as the lower insertion rod and the upper insertion rod, when the ground settles or rises, the sleeve frame drives the lower insertion rod to move accordingly. The lower insertion rod, together with the upper insertion rod, locks and limits the rotating door, thereby giving advance warning to the operator and preventing major safety accidents such as tilting and collapsing of the rotating door during maintenance inside the expansion cabinet.

[0021] 5. In this invention, by setting up a blocking component and a plug and other components to cooperate with each other, the blocking component limits and blocks the rotating door. When the expansion cabinet tilts, the rotating door drives the blocking component and the plug to move in the opposite direction, and the plug and the female socket quickly disengage and are fixed. Attached Figure Description

[0022] Figure 1 This is a frontal three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side stereoscopic structure of the present invention; Figure 3 This is a schematic diagram of the original cabinet structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the expansion cabinet of the present invention; Figure 5 This is a rear view of the internal three-dimensional structure of the expansion cabinet of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a right-side three-dimensional view of the internal structure of the expansion cabinet of the present invention; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 This is a three-dimensional structural diagram of the support portion of the present invention; Figure 10 This is a three-dimensional structural diagram of the isolation section and the plug-in section of the present invention; Figure 11 This is a three-dimensional structural diagram of the plug-in part of the present invention.

[0023] In the diagram: 1. Original cabinet; 2. Expansion cabinet; 3. Cable well; 4. Side door; 5. Support unit; 501. Support rod; 502. Sleeve frame; 503. Elastic pad; 504. Lower insertion rod; 6. Isolation unit; 601. Frame; 602. Rotating door; 603. Top plate; 604. Bottom plate; 605. Lock hole; 606. Reset component; 607. Upper insertion rod; 608. Limiting hole; 609. Positioning hole; 7. Plug-in unit; 701. Slide plate; 702. Blocking component; 703. Plug; 704. Flexible part; 8. Female power strip; 9. Female power strip; 10. Connecting door; 11. Support component; 12. Connecting frame. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 Existing ring main units are all directly installed outdoors. When the number of electrical devices inside the ring main unit is insufficient and expansion is needed, the limited internal space makes it impossible to directly add electrical devices inside the ring main unit. This necessitates replacing the ring main unit with a new one, increasing the difficulty of expansion. Furthermore, after expanding the original unit 1 with expansion cabinet 2, non-operating personnel or animals can directly enter the original unit 1 through expansion cabinet 2, thereby reducing the safety of the electrical devices inside the original unit 1. Additionally, the connection between the original unit 1 and expansion cabinet 2 is difficult to inspect, as operators cannot enter the original unit 1 through expansion cabinet 2 to perform necessary maintenance. Moreover, connecting expansion cabinet 2 to the original unit 1 will block the side of the original unit 1, thus affecting the normal flow and discharge of heat inside the original unit 1.

[0026] To solve the above problems, such as Figures 1 to 11 As shown, this modular expandable ring main unit includes a main unit 1 and a cable well 3 fixedly installed at the bottom of the main unit 1. The cable well 3 is a concrete square structure. The internal cables directly enter the main unit 1 through the cable well 3 for electrical connection. The height of the cable well 3 is greater than the ground height to prevent rainwater from flowing back into the main unit 1 and affecting the normal use of the electrical equipment inside the main unit 1.

[0027] An expansion cabinet 2 is fixedly installed on one side of the original cabinet 1. The expansion cabinet 2 is mainly located on the side of the original cabinet 1 and will not affect the normal operation of the electrical equipment inside the original cabinet 1. Both the original cabinet 1 and the expansion cabinet 2 have ventilation holes at the bottom to facilitate rapid heat dissipation of the internal electrical equipment. At the same time, the bottom height of the expansion cabinet 2 corresponds to the bottom height of the original cabinet 1, thereby preventing rainwater from entering the interior of the expansion cabinet 2. Multiple cabinet doors are evenly arranged on the side walls of the original cabinet 1 and the expansion cabinet 2, and rain covers are installed on the top of the original cabinet 1 and the expansion cabinet 2.

[0028] The original cabinet 1 has a side door 4 on one side, and the expansion cabinet 2 has a docking door 10 on one side. The side door 4 and the docking door 10 are fixed together by a connecting frame 12. That is, the original cabinet 1 and the expansion cabinet 2 are spliced ​​and fixed by the connecting frame 12. The connecting frame 12 can be a corrugated elastic structure, which has a certain deformation gap and can meet the partial displacement of the expansion cabinet 2 during actual use. A female power strip 8 is fixedly installed inside the original cabinet 1. The female power strip 8 is electrically connected to multiple electrical devices inside the original cabinet 1. A female power strip 9 is fixedly installed inside the expansion cabinet 2. The female power strip 9 is electrically connected to multiple electrical devices inside the expansion cabinet 2. The female power strip 8 and the female power strip 9 are fixedly connected by a plug-in part 7. The plug-in part 7 connects the female power strip 8 and the female power strip 9, thereby realizing the electrical connection between the electrical devices of the original cabinet 1 and the expansion cabinet 2.

[0029] The support part 5, which is fixedly connected to one side of the original cabinet 1, includes a sleeve frame 502 and a lower insertion rod 504, and is used to support the expansion cabinet 2. The support part 5 provides the required support force to the expansion cabinet 2 to prevent it from tilting and separating from the original cabinet 1 after long-term use.

[0030] The support part 5 also includes a support rod 501, the end of which is inserted and fixed to the side wall of the cable well 3. The support rod 501 provides support and fixation for the bottom of the expansion cabinet 2. The support rod 501 improves the convenience of outdoor expansion by being inserted and fixed to the cable well 3. The frame 502 is fixedly installed inside the frame and on the outer surface of the support rod 501. Multiple sets of support rods 501 and frames 502 are evenly arranged and correspond to the bottom of the expansion cabinet 2, specifically corresponding to the positions of the side door 4 and the docking door 10. The frame 502 wraps and fixes the support rod 501, improving the support stability of the support rod 501.

[0031] The elastic pad 503 is fixedly connected to the top of the frame 502 at its bottom and elastically contacts the bottom of the expansion cabinet 2 at its top. It is used to elastically support the bottom of the expansion cabinet 2. The setting of the elastic pad 503 improves the elastic support effect of the frame 502 on the bottom of the expansion cabinet 2 and avoids external shaking and other factors from affecting the support stability of the frame 502 and the expansion cabinet 2.

[0032] The isolation section 6, which is fixedly connected inside the expansion cabinet 2, includes a rotating door 602, a top plate 603, a bottom plate 604, and an upper insertion rod 607. The rotating door 602 rotates and forms an isolation space with the frame 601, the top plate 603, and the bottom plate 604 to prevent non-operating personnel or animals from entering the original cabinet 1 through the expansion cabinet 2. When the supporting force of the frame 502 on the expansion cabinet 2 decreases, the upper insertion rod 607 moves downward and locks and limits the rotating door 602, making it impossible for the rotating door 602 to rotate and open. With the locking and limiting reminder of the rotating door 602, it effectively prevents the operator from causing the expansion cabinet 2 to tilt and collapse during maintenance. The two sets of rotating doors 602 face each other and are sealed and limited by staggered protrusions to ensure the tightness and sealing of the rotating door 602 when it is closed.

[0033] The isolation section 6 also includes a frame 601, which is symmetrically arranged inside the expansion cabinet 2. The end of the frame 601 near the docking door 10 is rotatably connected to the side wall of the rotating door 602. The frame 601 is located inside the expansion cabinet 2 and faces both sides of the docking door 10. Therefore, the frame 601 limits and blocks the interior of the expansion cabinet 2. The electrical equipment is located on the opposite sides of the frame 601, so as not to obstruct the operator from entering the original cabinet 1 along the expansion cabinet 2.

[0034] The distance between the two sets of frame 601 matches the length of the two sets of rotating doors 602, and the sum of the length of the frame 601 and the length of the rotating door 602 matches the width of the expansion cabinet 2. The rotating door 602 is equipped with a handle at its end. When the rotating door 602 is rotated towards the side door 4 and opened, the rotating door 602 abuts against the inner wall of the side door 4 and is limited, thus facilitating the operator to enter the original cabinet 1 for maintenance along the expansion cabinet 2. Furthermore, multiple ventilation holes are evenly arranged on the rotating door 602 and the cabinet door, thus facilitating the flow and discharge of heat inside the original cabinet 1 and the expansion cabinet 2.

[0035] The top plate 603 is fixedly connected to the top of the frame 601. A limiting hole 608 is opened inside the top plate 603. The bottom plate 604 is fixedly connected to the bottom of the frame 601. The other ends of the top plate 603 and the bottom plate 604 are respectively aligned with the inner wall of the side door 4 to support and connect the original cabinet 1 and the expansion cabinet 2. Therefore, the frame 601, the top plate 603 and the bottom plate 604 together form an isolation space in the center of the expansion cabinet 2, and the expansion cabinet 2 is connected to the original cabinet 1 by means of the rotating door 602. The female socket 8 and the female socket 9 are both located above the top plate 603. Therefore, when the operator inspects the original cabinet 1 and the expansion cabinet 2, he / she mainly moves inside the frame 601 and will not directly collide with the female socket 8 and the female socket 9, which further improves the safety of inspection.

[0036] The plug-in section 7 is movably connected above the isolation section 6 and includes a slide plate 701 and a plug 703. The plug 703 enables the plug-in and fixed electrical connection of the female plug strip 8 and the female plug strip 9.

[0037] One end of the sub-socket 9 is fixedly connected to a flexible part 704, and the other end of the flexible part 704 is fixedly connected to the side wall of the plug 703. The other end of the plug 703 is plugged into and fixed to the end of the female socket 8. The flexible part 704 is flexible and its length is greater than the distance between the female socket 8 and the sub-socket 9. The flexible part 704 provides a certain amount of room for movement in the plugging and fixing of the female socket 8 and the sub-socket 9, so as to prevent the expansion cabinet 2 from shaking and affecting the electrical connection between the female socket 8 and the sub-socket 9.

[0038] Multiple sets of support members 11 are evenly arranged at the bottom of the frame 502 and the bottom of the expansion cabinet 2. The bottom of the support member 11 is inserted and fixed to the ground. The support member 11 is used to adjust the support height of the frame 502 and the expansion cabinet 2. The support member 11 can be a manual jack structure, which drives the internal screw to move upward by rotating the handwheel and adjusts the height of the top output end frame 502 or expansion cabinet 2 accordingly.

[0039] In use, the original cabinet 1 is fixedly installed on the top of the cable well 3, and the height of the cable well 3 is greater than the ground height. The cables inside the cable well 3 enter the original cabinet 1 from the top and are connected to various electrical devices through the female plug 8, thereby meeting the usage requirements of the outdoor environment.

[0040] When the electrical equipment inside the original cabinet 1 is insufficient and needs to be expanded, the operator first inserts and fixes multiple sets of support rods 501 to the side wall of the cable well 3, and installs a fixing frame 502 on the outer surface of the support rods 501. Then, the expansion cabinet 2 is placed on top of the elastic pad 503 above the frame 502, and the side door 4 and the docking door 10 are bolted and fixed with the help of the connecting frame 12.

[0041] Simultaneously, plug 703 is plugged into and fixed to female socket 8. The other end of plug 703 is electrically connected to female socket 9 through flexible part 704, thereby realizing the electrical connection between the circuit inside the original cabinet 1 and the circuit inside the expansion cabinet 2. Then, multiple sets of support members 11 are evenly arranged at the bottom of the frame 502 and the bottom of the expansion cabinet 2. The height of the frame 502 and the expansion cabinet 2 is adjusted by adjusting the support members 11, thereby ensuring that the height of the expansion cabinet 2 matches the height of the original cabinet 1, and meeting the actual outdoor expansion needs.

[0042] Therefore, under normal use, the height of the expansion cabinet 2 matches the height of the original cabinet 1 and is higher than the ground. The rotating doors 602 abut against each other and are closed in conjunction with the frame 601, preventing non-operating personnel or animals from directly entering the interior of the original cabinet 1 through the expansion cabinet 2 and causing safety accidents. At the same time, the original cabinet 1 and the expansion cabinet 2 are connected by the side door 4 and the docking door 10. With the help of the rotating door 602 and multiple ventilation holes on the cabinet door, the heat inside the original cabinet 1 and the expansion cabinet 2 can be effectively discharged normally, preventing the expansion cabinet 2 from blocking the heat insulation of the original cabinet 1 and affecting the normal operation of the internal electrical equipment.

[0043] When the original cabinet 1 and the expansion cabinet 2 require regular maintenance after long-term use, the operator opens the cabinet door and continues to push the rotating door 602 to rotate towards the side door 4 and abut against the inner wall of the side door 4. With the help of the rotating door 602, the temporary support of the connecting frame 12 is spliced, which further improves the splicing support and safety of the operator moving and maintaining inside the expansion cabinet 2, and facilitates the operator to move and maintain inside the original cabinet 1 and the expansion cabinet 2.

[0044] At this point, a connecting space is formed between the frame 601, the rotating door 602, the top plate 603, and the bottom plate 604, which facilitates the operator to move directly above the bottom plate 604 and perform regular maintenance on the original cabinet 1. At the same time, the top plate 603 effectively isolates and blocks the female socket 8 and the female socket 9, preventing the operator from directly colliding with the female socket 8 and the female socket 9 and causing safety accidents. Meanwhile, the bottom plate 604 not only facilitates the movement of the operator, but can also temporarily support maintenance tools, facilitating the operator's long-term movement and maintenance.

[0045] After maintenance is completed, the operator moves out through the interior of the expansion cabinet 2. At the same time, the operator drives the rotating door 602 to rotate in the opposite direction and close it by using the handle on the side wall of the rotating door 602. This creates an isolation space between the frame 601, the rotating door 602, the top plate 603, and the bottom plate 604, thereby preventing non-staff members or animals from directly opening the cabinet door and entering the interior of the original cabinet 1 through the expansion cabinet 2, which would affect the normal operation of the electrical equipment inside. This improves the safety and stability of the equipment used in actual outdoor environments.

[0046] Example 2 In actual outdoor use, when the ground settles or rises, the supporting force exerted by the support member 11 on the frame 502 and the expansion cabinet 2 changes accordingly. Although the expansion cabinet 2 does not tilt or deform, when maintenance personnel enter the expansion cabinet 2 for maintenance, the expansion cabinet 2 itself is subjected to increased force and deforms, tilting and collapsing, thus causing a major safety accident to the maintenance personnel inside the expansion cabinet 2. When the ground settlement or rise is too large and directly causes the expansion cabinet 2 to tilt, the female socket 8 and the female socket 9 are still electrically connected through the plug-in part 7. Therefore, after the female socket 9 tilts with the expansion cabinet 2, it will pull the female socket 8 to bend and tilt, which will correspondingly cause the original cabinet 1 to tilt and collapse, thus causing a major safety accident.

[0047] To address the aforementioned issues, the isolation section 6 of this modular expandable ring main unit further includes a lock hole 605 located inside the base plate 604. Multiple sets of lock holes 605 are provided. An upper insert rod 607 is inserted into the lock hole 605 and locks and limits the rotation of the rotating door 602. The lock hole 605, in conjunction with the upper insert rod 607 and the lower insert rod 504, locks and limits the rotation of the rotating door 602, preventing operators from directly opening the rotating door 602 and entering the interior of the expansion cabinet 2 when the supporting force on the expansion cabinet 2 changes, thus preventing the cabinet from tilting and collapsing.

[0048] Positioning holes 609 are evenly distributed at the bottom of the revolving door 602. The positioning holes 609 limit the upper insertion rod 607, and the lock hole 605 corresponds to the positioning holes 609. The top of each positioning hole 609 is fixedly connected to a reset member 606. The reset member 606 is elastic and can drive the upper insertion rod 607 to elastically reset. The bottom of the reset member 606 abuts against the top of the upper insertion rod 607. The upper insertion rod 607 moves downward and inserts into the lock hole 605, thereby locking and limiting the normal rotation of the revolving door 602.

[0049] The bottom of the lower insertion rod 504 contacts the top of the sleeve frame 502. When the sleeve frame 502 swings, it drives the lower insertion rod 504 to move up and down synchronously. The upper insertion rod 607 and the lower insertion rod 504 abut against each other and are matched with the lock hole 605. Therefore, the upper insertion rod 607 can lock and limit the rotating door 602 when it enters the lock hole 605 or the positioning hole 609. The top of the lower insertion rod 504 passes through the bottom of the extension cabinet 2 and is movably connected to the lock hole 605. Therefore, the lower insertion rod 504 mainly moves inside the lock hole 605 and the positioning hole 609. When the sleeve frame 502 tilts downward, it drives the lower insertion rod 504 to move downward along the lock hole 605. The upper insertion rod 607 moves downward accordingly and enters the lock hole 605 to lock and limit the rotating door 602.

[0050] The side wall of the rotating door 602, located on the side of the positioning hole 609, is set with a glass layer. The setting of this glass layer makes it convenient for operators to observe the position of the upper insertion rod 607 and the lower insertion rod 504 inside, and to quickly obtain the settlement or rise of the ground at the corresponding position.

[0051] The plug-in unit 7 also includes a blocking member 702, which is movably connected inside the limiting hole 608. The blocking member 702 can block the reverse rotation of the rotating door 602, and under normal circumstances, it prevents the door from being unable to close during the reverse rotation angle process. The top of the blocking member 702 is fixedly connected to the bottom of the slide plate 701. The movement of the blocking member 702 synchronously drives the slide plate 701 to move. The blocking member 702 limits and blocks the reverse rotation of the rotating door 602. When the expansion cabinet 2 tilts, the slide plate 701 moves synchronously and drives the plug 703 to move. The plug 703 disengages from the plug-in fixed to the female socket 8.

[0052] When the rotating door 602 rotates away from the side door 4, the rotating door 602 drives the blocking member 702 to move away from the side door 4. An elastic member is fixedly connected to the side wall of the blocking member 702, and the other end of the elastic member is fixedly connected to the side wall of the limiting hole 608, which is used to apply an elastic support force to the blocking member 702 and make it elastically reset.

[0053] The bottom of the slide plate 701 is slidably connected to the top of the top plate 603, that is, the slide plate 701 and the top plate 603 are slidably connected by a T-slot and a T-block, so that the slide plate 701 can only move in one direction above the top plate 603. The bottom of the plug 703 is fixedly connected to the top of the slide plate 701. The movement of the slide plate 701 drives the movement of the plug 703 synchronously, thereby realizing the plug-in and plug-out process between the plug 703 and the female socket 8.

[0054] The plug 703 is equipped with an arc extinguishing device. When the plug 703 is disconnected from the female socket 8, the arc extinguishing device is used to perform the arc extinguishing process. The width of the slide plate 701 is greater than the width of the blocking member 702. When the slide plate 701 moves away from the side door 4, it drives the plug 703 to move and make it disengage from the female socket 8, thereby realizing the rapid power-off process when the expansion cabinet 2 is tilted.

[0055] When in use, after the expansion cabinet 2 and the original cabinet 1 are spliced ​​and fixed, the operator pushes the blocking part 702 to move closer to the side door 4. The blocking part 702 simultaneously drives the sliding plate 701 and the plug 703 to move along the top plate 603. The plug 703 is plugged and fixed to the end of the female socket 8, and the side wall of the blocking part 702 abuts against the side wall of the rotating door 602 to block and limit the movement.

[0056] When the operator closes the revolving door 602, the revolving door 602 rotates away from the side door 4 and stops rotating after contacting the blocking part 702. This effectively limits the rotation angle of the revolving door 602, ensuring that the positioning hole 609 corresponds to the lock hole 605, and improving the locking and limiting effect of the lower insertion rod 504 and the upper insertion rod 607 on the revolving door 602.

[0057] At this time, the support rod 501 and the sleeve frame 502 are in their initial positions and apply a supporting force to the lower insertion rod 504, so that the lower insertion rod 504 is located inside the lock hole 605, and the top of the lower insertion rod 504 is flush with the top of the lock hole 605. At the same time, under the supporting force of the lower insertion rod 504, the upper insertion rod 607 is driven to press the reset piece 606, which is not in its initial position. The bottom of the upper insertion rod 607 is flush with the bottom of the positioning hole 609. Neither the upper insertion rod 607 nor the lower insertion rod 504 will obstruct the rotation of the rotating door 602.

[0058] When a certain location on the ground settles, the support member 11 at that location will sink downwards accordingly. At this time, the support force of the support member 11 on the frame 502 will decrease. After long-term use and when the support force of the strut 501 is insufficient, the strut 501 will cause the frame 502 to bend downwards. The strut 501 will cause the lower insertion rod 504 at the corresponding position to move downwards along the lock hole 605. At this time, since other positions can still provide temporary support for the expansion cabinet 2, the expansion cabinet 2 will not tilt.

[0059] When the lower insertion rod 504 moves downward along the lock hole 605, the supporting force exerted by the lower insertion rod 504 on the upper insertion rod 607 decreases. Under the action of its own weight and the elastic force of the reset piece 606, the upper insertion rod 607 moves downward along the lock hole 605. The upper insertion rod 607 moves into the lock hole 605 and the positioning hole 609 and locks and limits the rotating door 602. After that, the operator performs regular maintenance. When the operator opens the cabinet door and continues to open the rotating door 602, the rotating door 602 cannot be rotated and opened because the upper insertion rod 607 locks and limits the rotating door 602. At the same time, the downward movement distance of the upper insertion rod 607 is obtained by using the glass layer on one side of the positioning hole 609.

[0060] At this point, the operator only needs to increase the height of the top output end of the support member 11 accordingly. The support member 11 will then drive the sleeve frame 502 to move upward and the lower insertion rod 504 to move upward. The lower insertion rod 504 will push the upper insertion rod 607 to move upward to the appropriate position and disengage from the locking limit of the lock hole 605. After that, the operator will continue to rotate and open the rotating door 602. The upper insertion rod 607 will rotate synchronously with the rotating door 602 inside the positioning hole 609. The bottom of the upper insertion rod 607 will press against the top of the base plate 604. Therefore, the upper insertion rod 607 will not obstruct the normal rotation of the rotating door 602, further improving the support accuracy of the support member 11 for the sleeve frame 502 and preventing it from settling with the ground and causing the expansion cabinet 2 to tilt.

[0061] Similarly, when a certain position of the ground is raised, the support member 11 at that position is raised accordingly. At this time, the supporting force of the support member 11 on the sleeve 502 increases and causes the support rod 501 to bend upward. The sleeve 502 squeezes the elastic pad 503 and causes the lower insertion rod 504 at the corresponding position to move upward along the locking hole 605. The lower insertion rod 504 pushes the upper insertion rod 607 to squeeze the reset member 606 to move upward. The lower insertion rod 504 is inserted into the positioning hole 609 for locking and limiting.

[0062] Afterwards, if the operator cannot continue to rotate the rotating door 602 after opening the cabinet door, and observes the glass layer on one side of the positioning hole 609 to obtain the lower insertion rod 504 inserted into the positioning hole 609, the operator only needs to reduce the height value of the top output end of the support member 11 accordingly. The support member 11 will then move the lower insertion rod 504 downward to a suitable position through the sleeve frame 502 and re-disengage from the locking limit state with the positioning hole 609. After that, the above process can be repeated to rotate and open the rotating door 602 for maintenance. This process effectively provides advance warning of ground subsidence or lifting, and avoids major safety accidents such as the expansion cabinet 2 tilting and collapsing due to changes in the gravity of the expansion cabinet 2 when the operator blindly enters the expansion cabinet 2 for maintenance.

[0063] Before the expansion cabinet 2 tilts over after prolonged use, the multiple support components 11 below the expansion cabinet 2 are detached from the support of the bottom of the sleeve frame 502, and the support rod 501 and the sleeve frame 502 bend downwards to the maximum value. At this time, the expansion cabinet 2 is only temporarily horizontally connected to the original cabinet 1 by the connecting frame 12. The lower insertion rod 504 moves downwards along the lock hole 605 to the maximum distance and detaches from the support limit of the upper insertion rod 607.

[0064] At this time, under the gravity of the upper insertion rod 607 and the elastic force of the reset member 606, the upper insertion rod 607 moves downward and enters the lock hole 605. The upper insertion rod 607 disengages from the positioning hole 609, while the reset member 606 remains inside the positioning hole 609. Therefore, the upper insertion rod 607 cannot lock and limit the rotating door 602, and the rotating door 602 remains closed due to the blocking action of the blocking member 702.

[0065] Subsequently, when the expansion cabinet 2 tilts downward and detaches from the fixed splicing with the original cabinet 1, the expansion cabinet 2 causes the internal rotating door 602 to tilt in the opposite direction away from the side door 4. Under its own weight, the rotating door 602 rotates in the opposite direction away from the side door 4. The side door 4 pushes the blocking member 702 to move in the opposite direction away from the side door 4. The blocking member 702 drives the plug 703 to move in the opposite direction away from the side door 4 simultaneously through the sliding plate 701. The plug 703 quickly disengages from the female socket 8 and is fixed in place. This effectively avoids the problem of the expansion cabinet 2 tilting and pulling the female socket 8, which in turn causes the original cabinet 1 to tilt. This achieves rapid separation and power cut-off of the expansion cabinet 2 and the original cabinet 1, ensuring the normal use safety and stability of the original cabinet 1.

[0066] Afterwards, the alarm device reminds the operator to arrive at the scene in time and increase the height of the top output end of the support component 11 accordingly. This causes the top output end of the support component 11 to push the frame 502 and the expansion cabinet 2 upward and repeatedly return to the initial position. The rotating door 602 rotates to the initial position near the side door 4. The frame 502 pushes the lower insertion rod 504 and the upper insertion rod 607 upward to the initial height. After the operator uses the connecting frame 12 to reassemble and fix the original cabinet 1 and the expansion cabinet 2, the operator pushes the blocking component 702 to move near the side door 4. The blocking component 702 drives the plug 703 to move through the sliding plate 701 and reconnects and fixes it to the female socket 8. The above process can be repeated.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or electrical apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or electrical apparatus.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular expandable ring main unit, comprising a base unit (1) and a cable well (3) fixedly installed at the bottom of the base unit (1), wherein an expansion unit (2) is fixedly installed on one side of the base unit (1), characterized in that, Also includes: The support part (5), which is fixedly connected to one side of the original cabinet (1), includes a sleeve frame (502) and a lower insert rod (504) for supporting the expansion cabinet (2); The isolation section (6) is fixedly connected inside the expansion cabinet (2) and includes a rotating door (602), a top plate (603), a bottom plate (604) and an upper insertion rod (607). When the supporting force of the frame (502) on the expansion cabinet (2) decreases, the upper insertion rod (607) moves downward and locks and limits the rotating door (602). The plug-in section (7) is movably connected above the isolation section (6) and includes a slide plate (701) and a plug (703). When the expansion cabinet (2) is tilted, the slide plate (701) moves, causing the plug (703) to move and disengage from the plug-in fixation. The original cabinet (1) has a side door (4) on one side, and the expansion cabinet (2) has a docking door (10) on one side. The side door (4) and the docking door (10) are fixed together by a connecting frame (12). The original cabinet (1) has a female power strip (8) fixedly installed inside, and the expansion cabinet (2) has a female power strip (9) fixedly installed inside. The female power strip (8) and the female power strip (9) are fixed together by a plug-in part (7). The isolation section (6) also includes: The frame (601) is symmetrically arranged inside the extension cabinet (2). The ends of the two sets of frame (601) near the docking door (10) are rotatably connected to the side wall of the rotating door (602). The distance between the two sets of frame (601) matches the length of the two sets of rotating doors (602). The top plate (603) is fixedly connected to the top of the frame (601). A limit hole (608) is opened inside the top plate (603). The bottom plate (604) is fixedly connected to the bottom of the frame (601). The other ends of the top plate (603) and the bottom plate (604) correspond to the inner wall of the side door (4) to support and connect the original cabinet (1) and the extension cabinet (2).

2. The modular expandable ring main unit according to claim 1, characterized in that, The support portion (5) further includes: The support rod (501) is inserted and fixed to the side wall of the cable well (3) at its end, and the inside of the sleeve frame (502) is fixedly installed to the outer surface of the support rod (501). Multiple sets of support rods (501) and sleeve frames (502) are evenly arranged and correspond to the bottom of the expansion cabinet (2). The elastic pad (503) is fixedly connected to the top of the frame (502) at its bottom and elastically contacts the bottom of the expansion cabinet (2) at its top, and is used to elastically support the bottom of the expansion cabinet (2).

3. A modular and expandable ring main unit according to claim 1, characterized in that, The isolation section (6) also includes: The lock hole (605) is located inside the base plate (604), and multiple sets of lock holes (605) are provided. The upper insertion rod (607) is inserted into the lock hole (605) and locks and limits the rotating door (602). Positioning holes (609) are evenly distributed at the bottom of the rotating door (602), and the lock hole (605) corresponds to the positioning hole (609). The top of each positioning hole (609) is fixedly connected to a reset piece (606), and the bottom of the reset piece (606) abuts against the top of the upper insert rod (607).

4. A modular and expandable ring main unit according to claim 3, characterized in that, The bottom of the lower insert rod (504) contacts the top of the sleeve frame (502), the upper insert rod (607) and the lower insert rod (504) abut against each other and are matched with the lock hole (605). The top of the lower insert rod (504) passes through the bottom of the expansion cabinet (2) and is movably connected to the inside of the lock hole (605). When the sleeve frame (502) tilts downward, it drives the lower insert rod (504) to move downward along the lock hole (605).

5. A modular and expandable ring main unit according to claim 1, characterized in that, The plug-in unit (7) also includes: The blocking member (702) is movably connected inside the limiting hole (608), and the top of the blocking member (702) is fixedly connected to the bottom of the sliding plate (701). The blocking member (702) limits and blocks the rotating door (602). When the rotating door (602) rotates away from the side door (4), the rotating door (602) drives the blocking member (702) to move away from the side door (4). The bottom of the skateboard (701) is slidably connected to the top of the top plate (603), the bottom of the plug (703) is fixedly connected to the top of the skateboard (701), and the width of the skateboard (701) is greater than the width of the blocking member (702).

6. A modular and expandable ring main unit according to claim 1, characterized in that, One end of the sub-socket (9) is fixedly connected to a flexible part (704), and the other end of the flexible part (704) is fixedly connected to the side wall of the plug (703). The other end of the plug (703) is inserted and fixed to the end of the female socket (8). The flexible part (704) is flexible and its length is greater than the distance between the female socket (8) and the sub-socket (9). When the slide plate (701) moves away from the side door (4), it drives the plug (703) to move and disengages it from the female socket (8).

7. A modular and expandable ring main unit according to claim 1, characterized in that, Multiple sets of support members (11) are evenly arranged at the bottom of the frame (502) and the bottom of the expansion cabinet (2). The bottom of the support member (11) is inserted and fixed to the ground. The support member (11) is used to adjust the support height of the frame (502) and the expansion cabinet (2).

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