Modular scalable electric energy metering cabinet

Abstract

This invention discloses a modular expandable electricity metering box, relating to the technical field of electricity metering boxes. It includes a box body with a door and a frame. An extension plate is connected inside the door, and an expansion plate is connected to the frame. The box body contains a connecting groove and a connecting block. A connecting part includes a main board and a secondary board connected to the main board within the frame. A filling part includes a protrusion connected to a protruding rod. A guide groove is provided inside the box, and the protruding rod is connected to the guide groove. A locking part includes a limit rod with a driving block below it. The driving block is connected to a pull rope, and a power switch is installed on the main board. The pull rope is connected to the power switch. This invention enables the expansion of the internal space of the metering box and automatically fills the gap created by the expansion and the door, preventing external dust and impurities from entering the box. It also requires power disconnection during expansion operations to ensure safety and prevent safety hazards caused by errors.

Description

Technical Field

[0001] This invention relates to the field of electricity metering boxes, specifically a modular and expandable electricity metering box. Background Technology

[0002] With the deepening of smart grid construction and the continuous growth of electricity load, the application scenarios of electricity metering boxes are becoming increasingly complex. Different application scenarios have different requirements for the capacity, size, and installation method of metering boxes. However, existing electricity metering boxes have significant technical shortcomings in terms of space adaptability, expansion convenience, and installation efficiency, and can no longer meet the growing flexibility requirements of distribution network construction.

[0003] First, most existing electricity metering boxes adopt a fixed-volume, integrated design. The internal space of the box is determined at the factory and cannot be flexibly adjusted according to actual electricity demand. As the number of household electrical appliances increases, the wiring space and meter capacity of the original metering box are often insufficient, forcing the need to replace it with a larger metering box. This "replacement instead of expansion" approach is very likely to lead to waste of existing equipment and increased material procurement costs.

[0004] Secondly, when the internal space of the metering box is increased by splicing or expansion, a long-neglected but crucial problem arises: gaps inevitably appear between the front door panel and the box body after expansion. The existence of these gaps will bring a series of serious consequences. For example, rainwater and moisture can seep into the box through the gaps, causing electrical components to become damp, insulation performance to deteriorate, creepage phenomena, and even short circuits. Dust and foreign objects can enter the box through the gaps, and long-term accumulation will form a conductive layer, reducing the safety margin of the equipment. The gaps will also damage the overall aesthetics and protection level of the box, affecting the user's perception of the power supply service quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a modular expandable energy metering box that can expand the internal space of the metering box and automatically fill the gaps created by the expansion and the box door, preventing external dust and impurities from entering the box and causing damage. It can also control the power to be cut off when the metering box is being expanded, ensuring the safety of the operation and avoiding safety hazards caused by errors.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A modular, scalable energy metering box includes:

[0008] The box body has a door on the front, an extension plate that slides inside the door, and frames on both the left and right sides of the box body. An extension plate is fixedly connected to the frame and slides inside the box body. A connecting groove is provided at the lower end of the box body and a connecting block is provided at the upper end.

[0009] The connecting part includes a main board, which is disposed in the inner cavity of the housing, and a sub-plate is disposed in the frame, which is slidably connected to the main board.

[0010] The filling part includes a protrusion that is slidably connected to the expansion plate. The lower end of the protrusion is connected to a protruding rod. The inner cavity of the box is provided with a guide groove, and the protruding rod is slidably connected to the guide groove.

[0011] The locking part includes a limit rod that is slidably connected in a guide groove. A drive block is provided at the lower end of the limit rod, and a pull rope is connected to the middle of the drive block. An electric switch is installed on the main board, and the pull rope is connected to the electric switch.

[0012] When the power switch is closed, the pull rope pulls the drive block, causing the limit rod to disengage from the guide groove.

[0013] When the extension plate extends out of the box, the protrusion automatically pops out to fill the gap with the box door. When it retracts, the protrusion is guided by the guide groove, driving the protrusion to retract into the extension plate.

[0014] Preferably, the front of the box body is provided with a box door, the inner side of the box door is provided with a groove, and an extension plate is slidably connected in the groove. Fastening bolts are threadedly connected to the upper and lower sides of the front of the box door, and the rear end of the fastening bolts passes through the box door and fits against the surface of the extension plate.

[0015] Preferably, the left and right sides of the box are provided with a frame, the box door is rotatably connected to the middle of the frame by a hinge, and an extension plate is fixedly connected to the side of the two frames near the box, the extension plate being slidably connected to the middle of the inner cavity of the box.

[0016] Preferably, a connecting groove is provided in the middle of the lower end of the box, while a connecting block is fixedly connected to the middle of the upper end of the box, and a protective plate is fixedly connected to both the connecting groove and the connecting block.

[0017] Preferably, a first mounting rib is fixedly connected to both the left and right sides of the inner cavity of the box, and multiple main boards are fixedly connected to the front of the first mounting rib. A second mounting rib is fixedly connected to the inner cavity of both sets of frame, and a sub-plate is fixedly connected to the front of the second mounting rib. The outer ring of the middle section of the sub-plate is slidably connected to the inner cavity of the main board.

[0018] Preferably, grooves are provided on both the upper and lower sides of the front of the expansion plate, and protrusions are slidably connected in the grooves. A first spring is fixedly connected to one end of the protrusion located in the groove, and the other end of the first spring is fixedly connected to the middle of the inner cavity of the expansion plate. A protruding rod is slidably connected to the lower end of each protrusion, and the lower end of each protruding rod penetrates the expansion plate and is slidably connected to the inner surface of the expansion plate.

[0019] Preferably, the four corners of the front of the box are provided with transition grooves, that is, the protrusions that extend or retract from the box are slidably connected in the transition grooves. The box is provided with a guide groove on the side of the protrusion that extends out of the extension plate, and the arc trajectory of the guide groove is the same as that of the transition groove, and the outer ring of the protrusion is slidably connected in the guide groove.

[0020] Preferably, a through groove is provided at the entrance and exit of the guide groove, and a limit rod is slidably connected in the through groove. The limit rod is set between two adjacent sets of protrusions. A sloping plate is fixedly connected to the lower end of the limit rod, and a second spring is fixedly connected to the inner ring of the upper end of the sloping plate. The upper end of the second spring is fixedly connected to the inner cavity of the box.

[0021] Preferably, a guide rail is fixedly connected to the inner cavity of the housing at the position of the inclined panel, and a driving block is slidably connected to the inner cavity of the guide rail. The driving block is attached to the lower part of the inclined panel, and a third spring is fixedly connected to the rear side of the driving block. The rear end of the third spring is fixedly connected to the middle of the inner cavity of the guide rail.

[0022] Preferably, a pull rope is fixedly connected to the middle of the rear end of the drive block. The pull rope is sleeved on the inner ring of the third spring, and the outer ring of the middle section of the pull rope passes through and is slidably connected to the middle of the rear end of the guide rail. An electric switch is fixedly connected to the main board. The lower end of the pull rope is fixedly connected to the handle of the electric switch. A guide ring is fixedly connected to the upper end of the inner cavity of the housing, and the outer ring of the middle section of the pull rope is slidably connected inside the guide ring.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The filling part of the present invention can expand the internal space of the metering box and automatically fill the gap caused by the expansion of the space and the box door, so as to prevent external dust and impurities from entering the box and causing damage. When adjusting the internal space of the box, the outer frame is pulled to drive the expansion plate to slide out of the box. At this time, the protrusion is released from the limit of the box and the guide groove and quickly extends forward to fill the gap between the expansion plate and the box door, so as to prevent a large amount of external impurities from entering the box. When it is necessary to retract the expanded space, the frame is pushed back to drive the expansion plate to retract into the box. At this time, the protrusion will slide backward through the guide groove and drive the protrusion to move backward synchronously until it is completely retracted into the inner cavity of the expansion plate. Then the expansion plate continues to move until it is retracted into the box to complete the shrinkage operation.

[0025] 2. The locking part of the present invention can control the metering box to be powered off when it is being expanded, ensuring the safety of the operation and avoiding safety hazards caused by mistakes, etc. If it is necessary to expand the space inside the box, the power switch is turned off first. At this time, the handle of the power switch will pull the rope to move, and the rope will drive the drive block to move, so that the displacement of the drive block releases the limit rod. Then the limit rod slides down and disengages from the guide groove, releasing the limit of the protrusion. Only then can the expansion operation be carried out.

[0026] 3. The box body and box door of the present invention can achieve the adaptation of the expanded box door and effectively fill the gap caused by the expansion. It can also realize the modular installation of the metering box and facilitate the rapid splicing of multiple metering boxes. If multiple metering boxes need to be spliced ​​and installed, the connecting blocks of different boxes can be connected to the connecting groove and fixed by bolts to complete the splicing and installation of multiple metering boxes. After the internal space of the box is expanded, the extension plate can be pulled out from the box door. At this time, the extension plate is used to fit the box body and the protrusion is used to fit the box door to achieve the sealing after the box body is expanded. Attached Figure Description

[0027] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the opening of the cabinet door in this invention;

[0030] Figure 3 This is a schematic diagram of the extension plate in this invention;

[0031] Figure 4 This is a schematic diagram of the box structure in this invention;

[0032] Figure 5 This is a schematic diagram illustrating the effect of splicing two sets of boxes in this invention;

[0033] Figure 6 This is a schematic diagram showing the location of the filling part in this invention;

[0034] Figure 7 This is a rear sectional view of the box body in this invention;

[0035] Figure 8 This is a schematic diagram of the filling part in this invention;

[0036] Figure 9 This is a bottom view schematic diagram of the expansion board in this invention;

[0037] Figure 10This is a schematic diagram of the guide groove in the present invention;

[0038] Figure 11 This is a schematic diagram showing the positions of the protruding rod and the guide groove in this invention;

[0039] Figure 12 This is a cross-sectional schematic diagram of the locking part in this invention;

[0040] Figure 13 This is a schematic diagram of the retraction of the limiting rod in this invention;

[0041] Figure 14 This is a schematic diagram showing the position of the pull rope in this invention.

[0042] The diagram shows the following labels: 10. Box body; 11. Box door; 12. Extension plate; 13. Fastening bolt; 14. Frame; 15. Expansion plate; 16. Connecting groove; 17. Connecting block; 18. Protective plate; 20. Connecting part; 21. First mounting rib; 22. Main board; 23. Second mounting rib; 24. Sub-plate; 30. Filling part; 31. Protrusion; 32. First spring; 33. Protruding rod; 34. Transition groove; 35. Guide groove; 40. Locking part; 41. Limiting rod; 42. Slanted panel; 43. Second spring; 44. Guide rail; 45. Drive block; 46. Third spring; 47. Pull rope; 48. Power switch; 49. Guide ring. Detailed Implementation

[0043] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0044] like Figures 1 to 14 As shown, this embodiment provides a modular and scalable energy metering box, including:

[0045] The box body 10 has a door 11 on the front and an extension plate 12 that is slidably connected inside the door 11. The left and right sides of the box body 10 are provided with a frame 14 and an extension plate 15 that is fixedly connected to the frame 14. The extension plate 15 is slidably connected to the inner cavity of the box body 10. The lower end of the box body 10 is provided with a connecting groove 16 and the upper end is provided with a connecting block 17.

[0046] The connecting part 20 includes a main board 22, which is disposed in the inner cavity of the housing 10. A sub-board 24 is disposed in the frame 14 and is slidably connected to the main board 22.

[0047] The filling part 30 includes a protrusion 31, which is slidably connected to the extension plate 15. The lower end of the protrusion 31 is connected to a protruding rod 33. The inner cavity of the box 10 is provided with a guide groove 35, and the protruding rod 33 is slidably connected to the guide groove 35.

[0048] The locking part 40 includes a limit rod 41, which is slidably connected in the guide groove 35. A drive block 45 is provided at the lower end of the limit rod 41, and a pull rope 47 is connected to the middle of the drive block 45. An electric switch 48 is installed on the main board 22, and the pull rope 47 is connected to the electric switch 48.

[0049] When the power switch 48 is closed, the pull rope 47 pulls the drive block 45, causing the limit rod 41 to disengage from the guide groove 35.

[0050] When the extension plate 15 extends out of the box 10, the protrusion 31 automatically pops out to fill the gap with the box door 11. When it retracts, the protrusion rod 33 is guided by the guide groove 35 to drive the protrusion 31 to retract into the extension plate 15.

[0051] It should be noted that, in order to ensure the stable operation of the device, the enclosure 10 should be equipped with a compatible electrical control unit and a safety unit to ensure the safety of the device.

[0052] In this embodiment, if multiple metering boxes need to be spliced ​​together, the connecting blocks 17 of different boxes 10 can be connected to the connecting grooves 16 and fixed with bolts to complete the splicing and installation of multiple metering boxes. If it is necessary to expand the space inside the box, first turn off the power switch 48. At this time, the handle of the power switch 48 will pull the pull rope 47 to move. The pull rope 47 will drive the drive block 45 to move, causing the drive block 45 to displace and release the limit rod 41. Then the limit rod 41 slides down and disengages from the guide groove 35, releasing the limit on the protrusion 33. Then the outer frame 14 is pulled, causing the expansion plate 15 to slide out from the box 10. At this time, the protrusion 31 disengages from the limit of the box 10 and the guide groove 35 and quickly extends forward to fill the gap between the expansion plate 15 and the box door 11, preventing a large amount of external impurities. When the extended space needs to be retracted after entering the box, the frame 14 is pushed back to retract the extension plate 15 into the box 10. At this time, the protruding rod 33 will slide backward through the guide groove 35 and drive the protruding block 31 to move backward synchronously until it is completely retracted into the inner cavity of the extension plate 15. Then the extension plate 15 continues to move until it is retracted into the box 10 to complete the retraction operation. After the expansion or retraction operation is completed, the circuit is closed again. Then the drive block 45 releases the limit of the pull rope 47, quickly resets, and drives the limit rod 41 to reset and re-insert into the guide groove 35 to limit the protruding rod 33.

[0053] Please refer to it again. Figures 1 to 7The front of the box body 10 is provided with a box door 11. A groove is provided on the inner side of the box door 11, and an extension plate 12 is slidably connected in the groove. Fastening bolts 13 are threadedly connected to the upper and lower sides of the front of the box door 11. The rear end of the fastening bolt 13 passes through the box door 11 and is attached to the surface of the extension plate 12.

[0054] The left and right sides of the box 10 are provided with frame 14, and the box door 11 is connected to the middle of the frame 14 by hinge. The two sets of frame 14 are fixedly connected to the side of the box 10, and the extension plate 15 is slidably connected to the middle of the inner cavity of the box 10.

[0055] A connecting groove 16 is provided in the middle of the lower end of the housing 10, while a connecting block 17 is fixedly connected to the middle of the upper end of the housing 10, and a protective plate 18 is fixedly connected to both the connecting groove 16 and the connecting block 17.

[0056] It should be noted that the extension plate 12 is a T-shaped structure plate, and the door 11 has a matching groove inside;

[0057] The height of the extension plate 12 is lower than that of the protrusion 31, and the upper edge of the extension plate 12 is sufficient to fit and cover the upper end of the box 10. The purpose is that when the box 10 is extended, the area above the door 11 of the protrusion 31 is covered and closed, and the upper part of the box 10 is covered and closed.

[0058] The extension length of the extension plate 12 should be the same as the extension length of the expansion plate 15 to avoid gaps at the transition between the box body 10 and the expansion plate 15, which would create large voids.

[0059] The expansion plate 15 has raised strips on both the top and bottom sides (such as...). Figure 7 As shown), the protrusion is slidably connected inside the housing 10 and cannot extend out of the housing 10, which is intended to limit the range of motion of the extension plate 15 by means of the protrusion.

[0060] Both the connecting groove 16 and the connecting block 17 have pre-drilled connecting holes, which are intended to be used for bolt connection when assembling the upper and lower boxes 10.

[0061] In this embodiment, when in use, the fastening bolt 13 can be loosened first, causing the fastening bolt 13 to release the restriction on the extension plate 12. Then, the extension plate 12 can be pulled out from the door 11. After the extension length of the extension plate 12 is matched with the extension length of the expansion plate 15, the fastening bolt 13 can be tightened again to fix the position of the extension plate 12 and complete the covering of the upper part of the front of the box 10. Similarly, when retracting the expansion plate 15, the fastening bolt 13 can be loosened to push the extension plate 12 back into the door 11. The fastening bolt 13 can be tightened again to complete the storage. Through the cooperation of the connecting block 17 and the connecting groove 16 of another box 10, multiple boxes 10 can also be longitudinally spliced ​​and expanded to adapt to different installation spaces and table position requirements.

[0062] Please refer to it again. Figure 4 The left and right sides of the inner cavity of the housing 10 are fixedly connected with first mounting ribs 21. Multiple main boards 22 are fixedly connected to the front of the first mounting ribs 21. The inner cavities of the two sets of frame 14 are fixedly connected with second mounting ribs 23. The front of the second mounting ribs 23 is fixedly connected with sub-plates 24. The outer ring of the middle section of the sub-plates 24 is slidably connected to the inner cavity of the main board 22.

[0063] It should be noted that the motherboard 22 has a T-shaped groove inside, and the sub-board 24 also has a T-shaped structure, which ensures the stability of the sliding of the motherboard 22 and the sub-board 24.

[0064] In this embodiment, the sub-board 24 can be pulled out synchronously with the frame 14 during use, which increases the number of meter positions available for installation, meeting the installation requirements of newly added metering devices after expansion. The main board 22 and the sub-board 24 always maintain a sliding connection and will not detach during the expansion process, ensuring overall structural stability.

[0065] Please refer to it again. Figures 8 to 11 The upper and lower sides of the front of the expansion plate 15 are provided with grooves, and protrusions 31 are slidably connected in the grooves. One end of the protrusion 31 located in the groove is fixedly connected to a first spring 32, and the other end of the first spring 32 is fixedly connected to the middle of the inner cavity of the expansion plate 15. The lower end of the protrusion 31 is slidably connected to a protruding rod 33, and the lower end of the protruding rod 33 passes through the expansion plate 15 and is slidably connected to the inner surface of the expansion plate 15.

[0066] The four corners of the front of the box 10 are provided with transition grooves 34, and the protrusions 31 that extend or retract from the box 10 are slidably connected in the transition grooves 34. The box 10 has a guide groove 35 on the side where the protrusion 33 extends out of the extension plate 15, and the arc trajectory of the guide groove 35 is the same as that of the transition groove 34, and the outer ring of the protrusion 33 is slidably connected in the guide groove 35.

[0067] It should be noted that the outer sides of adjacent protrusions 31 fit together to fill the gap between the box body 10 and the box door 11;

[0068] The protruding rod 33 is a long rod with an arc shape at the front and back and a square structure in the middle, which is designed to ensure the stability of the sliding of the protruding rod 33 and the protrusion 31;

[0069] The front of the transition groove 34 has a gap, and the side of the gap has a sloping groove. This is designed so that when the protrusion 31 enters the housing 10, it will first enter the gap of the transition groove 34. Then, as the extension plate 15 slides, the protrusion 33 will gradually move backward due to the guidance of the guide groove 35, thereby driving the protrusion 31 to retract inward along the slope of the sloping groove until it is completely retracted into the extension plate 15 to complete the retraction operation.

[0070] During the process of pulling out the extension plate 15, the protrusion 33 will move outward along the guide groove 35, and the first spring 32 will also extend synchronously, driving the protrusion 31 to extend and fill the gap between the door 11 and the box body 10.

[0071] In this embodiment, when the expansion plate 15 is pulled outward, the protrusion 31 and the protruding rod 33 lose the restraint of the inner wall of the housing 10 and the guide groove 35. The first spring 32 will push the protrusion 31 to extend out of the groove of the expansion plate 15. During the extension of the protrusion 31, the protrusion 31 will drive the protruding rod 33 connected at the lower end to move outward synchronously along the guide groove 35 until the expansion plate 15 is pulled out to the preset position and stops. At this time, the protrusion 31 is fully extended, which just fills the gap between the door 11 and the housing 10 after expansion caused by the outward movement of the expansion plate 15. This prevents external dust and impurities from entering the housing 10 and affecting the normal operation of the measuring device, thus completing the sealing and filling of the space after expansion. When the extension plate 15 needs to be retracted, push the extension plate 15 inward, and the protrusion 33 will move along the guide groove 35 into the housing 10. Guided by the arc-shaped trajectory of the guide groove 35, the protrusion 33 will drive the protrusion 31 to gradually retract into the groove of the extension plate 15, compressing the first spring 32 to contract until the protrusion 31 is completely retracted into the extension plate 15, and the extension plate 15 is also completely retracted into the housing 10, completing the retraction operation.

[0072] Please refer to it again. Figures 12 to 14 A through groove is provided at the entrance and exit of the guide groove 35, and a limit rod 41 is slidably connected in the through groove. The limit rod 41 is set between two adjacent sets of protrusions 33. The lower end of the limit rod 41 is fixedly connected to an inclined plate 42, and the upper inner ring of the inclined plate 42 is fixedly connected to a second spring 43. The upper end of the second spring 43 is fixedly connected to the inner cavity of the box 10.

[0073] A guide rail 44 is fixedly connected to the inner cavity of the housing 10 at the position of the inclined panel 42. A drive block 45 is slidably connected to the inner cavity of the guide rail 44. The drive block 45 is attached to the lower part of the inclined panel 42. A third spring 46 is fixedly connected to the rear side of the drive block 45. The rear end of the third spring 46 is fixedly connected to the middle part of the inner cavity of the guide rail 44.

[0074] A pull rope 47 is fixedly connected to the middle of the rear end of the drive block 45. The pull rope 47 is sleeved on the inner ring of the third spring 46, and the outer ring of the middle section of the pull rope 47 passes through and is slidably connected to the middle of the rear end of the guide rail 44. An electric switch 48 is fixedly connected to the main board 22. The lower end of the pull rope 47 is fixedly connected to the handle of the electric switch 48. A guide ring 49 is fixedly connected to the upper end of the inner cavity of the housing 10. The outer ring of the middle section of the pull rope 47 is slidably connected inside the guide ring 49.

[0075] It should be noted that the lower end of the inclined panel 42 is provided with a ramp, and the upper end of the drive block 45 is also provided with a ramp. The purpose is to use the ramp to enable the drive block 45 to drive the inclined panel 42 and the limiting rod 41 to rise and be locked in the guide groove 35, thereby limiting the sliding of the protruding rod 33 and the extension plate 15.

[0076] The limiting rod 41 can never disengage from the through groove below the guide groove 35, so as to avoid affecting the subsequent reset;

[0077] Limit bars are provided on both the front and rear sides of the drive block 45 to limit the range of motion of the drive block 45;

[0078] Pulling down the handle of the power switch 48 de-energizes the work. This is intended to ensure that when performing expansion work, the power switch 48 must be pulled to de-energize the work before the pull rope 47 and drive block 45 can be moved to disengage the limit rod 41 from the guide groove 35. If the pull rope 47 is pulled alone, once released, the third spring 46 will push it back to reset, causing the drive block 45 and limit rod 41 to reset as well, thus preventing the expansion work from being performed. (This also covers situations where power de-energization is not possible. In such cases, the pull rope 47 can be pulled continuously to maintain the lowered state of the limit rod 41, ensuring that the working environment and internal electrical components are in a safe state, thereby achieving expansion work without power interruption.)

[0079] Both the guide ring 49 and the guide rail 44 are rounded to prevent the pull rope 47 from slipping and causing significant damage.

[0080] Both the limiting rod 41 and the housing 10 near the limiting rod 41 are made of high-strength metal.

[0081] The drive block 45 located not near the power switch 48 is controlled by a separate lever, while the drive block 45 located only near the power switch 48 is controlled by the handle of the power switch 48 for retraction and extension (e.g., Figure 4 (As shown).

[0082] In this embodiment, if the metering box needs to be expanded during use, the power switch 48 handle is pulled down to disconnect the power. When the power switch 48 handle is moved, it will pull the pull rope 47. Under the guidance of the guide ring 49, the pull rope 47 pulls the drive block 45 to slide backward along the guide rail 44. The drive block 45 moves backward and squeezes the third spring 46 to retract. Its upper slope no longer supports the inclined panel 42. The inclined panel 42 and the limiting rod 41 slide down synchronously under the action of gravity and the reset elastic force of the second spring 43, so that the limiting rod 41 is dislodged from the guide groove 35, releasing the limitation on the protrusion 33. Only then can the frame 14 be pulled to move the expansion plate 15 outward to complete the expansion operation. After the extension work is completed, the power is switched back on and the pull rope 47 is no longer under tension. The third spring 46 will push the drive block 45 to reset forward. When the drive block 45 moves forward, it presses the slope of the inclined plate 42 through the upper slope, pushing the inclined plate 42 and the limit rod 41 to move upward, so that the limit rod 41 is re-inserted into the guide groove 35 and locked between the two sets of protruding rods 33, limiting the displacement of the protruding rods 33 and the extension plate 15, thus completing the locking of the extension position.

[0083] The working principle of this invention is as follows: When using it, it is necessary to splice and install metering boxes in different positions. The protective plate 18 can be opened, and the connecting blocks 17 of different boxes 10 can be connected to the connecting grooves 16. Then, the connection and fixation can be completed by bolts. If it is necessary to expand the space inside the box, first pull down the handle of the power switch 48 to disconnect the power. When the handle of the power switch 48 is moved, it will pull the pull rope 47. Under the guidance of the guide ring 49, the pull rope 47 pulls the drive block 45 to slide backward along the guide rail 44. The drive block 45 moves backward and compresses the third spring 46 to retract. Its upper slope no longer supports the inclined panel 42. The inclined panel 42 and the limiting rod 41 slide down synchronously under the action of gravity and the reset force of the second spring 43, so that the limiting rod 41 disengages from the guide groove 35 and releases the limitation on the protrusion 33. Then, pull the outer frame 14 and the expansion plate 15. At this time, after the protrusion 31 and the protrusion 33 lose the limitation of the inner wall of the box 10 and the guide groove 35, the first spring 32 will push the protrusion 31 out of the expansion plate. The extension plate 15 extends out of the groove. During the extension process of the protrusion 31, the protrusion 31 will drive the lower end connected protrusion rod 33 to move outward synchronously along the guide groove 35 until the extension plate 15 is pulled out to the preset position and stops. At this time, the protrusion 31 is fully extended, which just fills the gap between the extended door 11 and the box body 10 caused by the outward movement of the extension plate 15. After the adjustment is completed, the power is turned on again and the pull rope 47 is no longer under tension. The third spring 46 will push the drive block 45 to reset forward. When the drive block 45 moves forward, it squeezes the slope of the inclined panel 42 through the upper slope, pushing the inclined panel 42 and the limit rod 41 to move upward, so that the limit rod 41 is re-inserted into the guide groove 35 and locked between the two sets of protrusion rods 33 for limiting and fixing. If the extension plate 15 needs to be retracted, push the extension plate 15 inward. The protruding rod 33 will move along the guide groove 35 into the box 10. Guided by the arc-shaped trajectory of the guide groove 35, the protruding rod 33 will drive the protrusion 31 to gradually retract into the groove of the extension plate 15, compressing the first spring 32 until the protrusion 31 is completely retracted into the extension plate 15, and the extension plate 15 is also completely retracted into the box 10, completing the retraction operation. After the box 10 is extended, the fastening bolt 13 can be loosened first, causing the fastening bolt 13 to release the restriction on the extension plate 12. Then, the extension plate 12 can be pulled out from the box door 11. After the extension length of the extension plate 12 is matched with the extension length of the extension plate 15, the fastening bolt 13 can be tightened again to fix the position of the extension plate 12, thus completing the covering of the upper front part of the box 10.

[0084] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A modular, scalable electric energy metering cabinet, characterized by: include: The box body (10) has a door (11) on the front and an extension plate (12) slidably connected inside the door (11). The left and right sides of the box body (10) are provided with a frame (14). An extension plate (15) is fixedly connected to the frame (14). The extension plate (15) is slidably connected to the inner cavity of the box body (10). The lower end of the box body (10) is provided with a connecting groove (16) and the upper end is provided with a connecting block (17). The connecting part (20) includes a main board (22), which is disposed in the inner cavity of the housing (10), and a sub-plate (24) is disposed in the frame (14), which is slidably connected to the main board (22); The filling part (30) includes a protrusion (31), which is slidably connected in the extension plate (15). The lower end of the protrusion (31) is connected to a protruding rod (33). The inner cavity of the box (10) is provided with a guide groove (35), and the protruding rod (33) is slidably connected in the guide groove (35). The locking part (40) includes a limit rod (41), which is slidably connected in the guide groove (35). A drive block (45) is provided at the lower end of the limit rod (41), and a pull rope (47) is connected to the middle of the drive block (45). An electric switch (48) is installed on the main board (22), and the pull rope (47) is connected to the electric switch (48). When the power switch (48) is closed, the pull rope (47) pulls the drive block (45), causing the limit rod (41) to disengage from the guide groove (35). When the extension plate (15) extends out of the box (10), the protrusion (31) automatically pops out to fill the gap with the box door (11). When it retracts, the protrusion rod (33) is guided by the guide groove (35) to drive the protrusion (31) to retract the extension plate (15).

2. The modular, scalable electric metering enclosure of claim 1, wherein: The front of the box (10) is provided with a box door (11), and a groove is provided on the inner side of the box door (11). An extension plate (12) is slidably connected in the groove. Fastening bolts (13) are threadedly connected to the upper and lower sides of the front of the box door (11). The rear end of the fastening bolt (13) passes through the box door (11) and is attached to the surface of the extension plate (12).

3. The modular, scalable electric metering enclosure of claim 1, wherein: The box (10) has a frame (14) on both the left and right sides. The box door (11) is connected to the middle of the frame (14) by a hinge. Both sets of frame (14) are fixedly connected to an extension plate (15) on the side of the box (10) that is close to the box. The extension plate (15) is slidably connected to the middle of the inner cavity of the box (10).

4. The modular, scalable electric metering enclosure of claim 1, wherein: A connecting groove (16) is provided in the middle of the lower end of the box (10), and a connecting block (17) is fixedly connected in the middle of the upper end of the box (10). A protective plate (18) is fixedly connected to both the connecting groove (16) and the connecting block (17).

5. The modular, scalable electric metering enclosure of claim 1, wherein: The left and right sides of the inner cavity of the box (10) are fixedly connected with first mounting ribs (21). Multiple sets of main boards (22) are fixedly connected to the front of the first mounting ribs (21). The inner cavities of the two sets of frame (14) are fixedly connected with second mounting ribs (23). The front of the second mounting ribs (23) is fixedly connected with sub-plates (24). The outer ring of the middle section of the sub-plates (24) is slidably connected to the inner cavity of the main board (22).

6. The modular expandable power metering box according to claim 3, characterized in that: The upper and lower sides of the front of the expansion plate (15) are provided with grooves, and protrusions (31) are slidably connected in the grooves. One end of the protrusion (31) located in the groove is fixedly connected to a first spring (32), and the other end of the first spring (32) is fixedly connected to the middle of the inner cavity of the expansion plate (15). The lower end of the protrusion (31) is slidably connected to a protruding rod (33), and the lower end of the protruding rod (33) penetrates the expansion plate (15) and is slidably connected to the inner surface of the expansion plate (15).

7. The modular expandable energy metering box according to claim 6, characterized in that: The box (10) has transition grooves (34) at all four corners of its front side. The protrusions (31) that extend or retract from the box (10) are slidably connected in the transition grooves (34). The box (10) has a guide groove (35) on the side where the protruding rod (33) extends out of the extension plate (15). The arc trajectory of the guide groove (35) is the same as that of the transition groove (34), and the outer ring of the protruding rod (33) is slidably connected in the guide groove (35).

8. The modular expandable power metering box according to claim 7, characterized in that: A through groove is provided at the entrance and exit of the guide groove (35), and a limit rod (41) is slidably connected in the through groove. The limit rod (41) is set between two adjacent sets of protrusions (33). The lower end of the limit rod (41) is fixedly connected to a sloping plate (42). The upper inner ring of the sloping plate (42) is fixedly connected to a second spring (43). The upper end of the second spring (43) is fixedly connected to the inner cavity of the box (10).

9. The modular expandable power metering box according to claim 8, characterized in that: The inner cavity of the housing (10) is fixedly connected to the inclined panel (42) with a guide rail (44). The inner cavity of the guide rail (44) is slidably connected to a drive block (45). The drive block (45) is attached to the lower part of the inclined panel (42). The rear side of the drive block (45) is fixedly connected to a third spring (46). The rear end of the third spring (46) is fixedly connected to the middle part of the inner cavity of the guide rail (44).

10. The modular expandable power metering box according to claim 9, characterized in that: A pull rope (47) is fixedly connected to the middle of the rear end of the drive block (45). The pull rope (47) is sleeved on the inner ring of the third spring (46), and the outer ring of the middle section of the pull rope (47) passes through and is slidably connected to the middle of the rear end of the guide rail (44). A power switch (48) is fixedly connected to the main board (22). The lower end of the pull rope (47) is fixedly connected to the handle of the power switch (48). A guide ring (49) is fixedly connected to the upper end of the inner cavity of the housing (10). The outer ring of the middle section of the pull rope (47) is slidably connected inside the guide ring (49).

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