Modular electric energy metering box
The modular design of the electricity metering box solves the problems of cumbersome operation and high safety risks during the maintenance of electricity metering boxes, and realizes quick disassembly and safe heat dissipation, thereby improving maintenance efficiency and reading accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG YONGLANG ELECTRIC CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-05-12
Smart Images
Figure CN120914643B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electricity metering box technology, and in particular to a modular electricity metering box. Background Technology
[0002] Electricity metering boxes are important equipment in power systems used for the installation, protection, and management of electricity metering devices. They are widely used in residential communities, industrial parks, commercial buildings, and public facilities. With the advancement of power grid construction and intelligent management, electricity metering boxes not only need to have safety, protection, and metering functions, but also need to have high convenience and efficiency in the installation, maintenance, and replacement of internal electrical components.
[0003] Existing electricity metering boxes typically adopt a fixed structure, where various electrical components (such as circuit breakers, terminals, meters, etc.) are fixed to the mounting plate with screws or clips. Although this structure can meet basic usage requirements, it still has the following shortcomings in actual maintenance: when internal electrical components are damaged or need to be replaced, it usually requires professional personnel to use tools to disassemble the fixing parts one by one, which is cumbersome, time-consuming and labor-intensive.
[0004] Furthermore, the internal space of the metering box is limited, and some components are installed deep inside the box. Maintenance personnel need to reach into the narrow space to operate, which not only increases the labor intensity but also poses certain safety risks, thereby reducing the maintenance efficiency of the electricity metering box. Summary of the Invention
[0005] The purpose of this application is to provide a modular electricity metering box that solves the problem that when internal electrical components are damaged or need to be replaced, it is usually necessary for professionals to use tools to disassemble the fasteners one by one, which is cumbersome, time-consuming and labor-intensive.
[0006] This application provides a modular electricity metering box, including a bracket, a box body fixedly connected to the top of the bracket, a heat dissipation mechanism installed on the left side of the box body, an adjustment mechanism provided on the top of the box body, a movable plate provided inside the box body, mounting blocks fixedly connected to both sides of the movable plate, a disassembly and assembly mechanism provided inside each of the mounting blocks, electrical components provided on the front side of each of the mounting blocks, a wire hole provided on the lower left side of the box body, a sealing mechanism provided inside the wire hole, a box door installed on the front side of the box body, transparent windows installed on both sides of the right side of the box door, and digital magnification mechanisms provided on the outside of the two transparent windows.
[0007] The disassembly and assembly mechanism includes a connecting ring disposed inside multiple mounting blocks. Rotating plates are rotatably connected to both outer sides of the connecting ring. Connecting rods are rotatably connected to both outer sides of the two rotating plates. Sliding blocks are provided on the outer sides of the multiple connecting rods. Limit blocks are fixedly connected to the top of each of the two sliding blocks. First springs are fixedly connected to both outer sides of the two sliding blocks. The bottoms of the multiple first springs are fixedly connected to both inner sides of the mounting blocks. Connecting plates are fixedly connected to the front outer sides of the two sliding blocks. Clamping plates are fixedly connected to the top of the two connecting plates. Anti-slip grooves are provided on the outer sides of the two clamping plates. Guide grooves are provided on both inner sides of the two sliding blocks. The multiple connecting rods are slidably connected within the multiple guide grooves.
[0008] By adopting the above technical solution, the two side clamps are moved outward, which drives the connecting plate and sliding block to move outward synchronously. This causes the connecting rod to push the rotating plate to rotate around the connecting ring, while squeezing multiple first springs. After the clamps are separated, the components can be taken out. During installation, the clamps are separated and the components are placed. After releasing, the first springs reset and fix the clamps. This structure facilitates the quick disassembly and assembly of electrical components in the power metering box. The guide groove facilitates the movement of the connecting rod.
[0009] Preferably, the adjustment mechanism includes a motor, which is located on the top left side of the housing. A first bevel gear is fixedly connected to the output end of the motor. A second bevel gear is meshed with the lower part of the first bevel gear. A transmission rod is fixedly connected inside the second bevel gear. A spur gear is fixedly connected to the lower part of the transmission rod. A rack plate is meshed with the outside of the spur gear. A connecting block is fixedly connected to the lower part of the rack plate. The bottom of the connecting block is fixedly connected to the top of the movable plate.
[0010] By adopting the above technical solution, the motor is started, and the motor drives the first bevel gear to rotate, which in turn drives the second bevel gear and the transmission rod to rotate. The spur gear on the transmission rod drives the rack plate to move forward. The rack plate pushes the moving plate and the mounting block forward to the front of the box through the connecting block. After the motor is stopped, the components are installed on the mounting block. After the installation is completed, the motor is started again to reset the moving plate.
[0011] Preferably, the sealing mechanism includes a telescopic rod, which is fixedly connected to the bottom left side of the box body. A second spring is sleeved on the outside of the telescopic rod. A movable block is fixedly connected to the top of the telescopic rod. A protrusion is fixedly connected to the top of the movable block. A sealing plate is fixedly connected to the right side of the movable block. The sealing plate is made of rubber. The sealing plate is slidably connected inside the wire hole. A push block is slidably connected to the lower left side of the box body. An insertion rod is fixedly connected inside the push block.
[0012] By adopting the above technical solution, the moving protrusion drives the moving block and the sealing plate to move to the left, exposing the wire hole. At the same time, it squeezes the telescopic rod and compresses the second spring. When the protrusion moves to the insertion rod position, it aligns the insertion hole with the insertion rod, pushes the push block to insert the insertion rod into the insertion hole, and completes the limiting of the sealing plate. Then the wire can be threaded. When not in use, the cable is taken out, the insertion rod is removed, and the second spring pushes the sealing plate to reset and seal the wire hole.
[0013] Preferably, the heat dissipation mechanism includes a ventilation duct, which is fixedly connected to the outer left side of the housing. A ventilation plate is installed inside the right side of the ventilation duct, and a dustproof plate is installed inside the left side of the ventilation duct. A motor is installed in the middle of the ventilation duct, and a rotating disk is fixedly connected to the output end of the motor. Fan blades are fixedly connected to all four sides of the rotating disk, and a protective cover is fitted over the ventilation duct.
[0014] By adopting the above technical solution, the motor is started, and the right side drives the rotating disk and fan blades to rotate. The outside air is filtered by the dustproof plate and then sent into the cabinet through the ventilation plate to dissipate heat from the electrical components. At the same time, the protective cover is installed by aligning the plug with the slot to prevent rainwater from entering and ensure safe heat dissipation even in rainy weather.
[0015] Preferably, the digital magnification mechanism includes a connecting block, which is fixedly connected to the middle of the two transparent windows. An adjusting block is slidably connected inside the connecting block. A slide rod is fixedly connected to the middle of the adjusting block. Guide blocks are slidably connected to both sides of the slide rod. A third spring is fixedly connected to the middle of the two guide blocks. The third spring is sleeved on the middle of the slide rod. A positioning plate is fixedly connected to the front side of the two guide blocks. A guide plate is fixedly connected to the front side of the adjusting block. Frames are fixedly connected to both sides of the bottom of the guide plates. Magnifying glasses are installed in the middle of the two frames. Baffles are provided on the front side of the two frames. Positioning blocks are fixedly connected to both sides of the outer edges of the two baffles. Multiple positioning blocks are arranged on the inner sides of the two frames.
[0016] By adopting the above technical solution, when viewing the external values of electrical components, first move the baffle so that the plug is inserted from the first positioning hole into the second positioning hole. Simultaneously operate the other baffle, move the positioning plate relative to it, compress the third spring, and move it upward after it is disengaged from the mounting hole. This causes the magnifying glass to rise outside the transparent window. After aligning with the mounting hole, release the positioning plate, and the third spring returns to its fixed position. The reading can be clearly obtained through the magnifying glass without opening the box door, avoiding safety hazards and environmental influences, and improving the accuracy of the reading.
[0017] Preferably, the mounting block has first sliding holes on both outer sides, and the two connecting plates are slidably connected inside the two first sliding holes. The two clamping plates are made of rubber. The mounting block has limit grooves on both inner sides, and the two limit blocks are slidably connected inside the two limit grooves. The top of the box is provided with a protective shell, and a slot is provided on the left side of the top of the box. The protective shell is inserted into the slot. A spot-welded mesh is installed on the right side of the outer side of the box. A knock-out hole is provided on the upper part of the spot-welded mesh, and the knock-out hole is located on the right side of the outer side of the box.
[0018] By adopting the above technical solutions, the first sliding hole facilitates the movement of the connecting plate, the limiting groove facilitates the movement of the limiting block, the slot facilitates the installation of the protective shell, the spot-welded mesh facilitates ventilation and heat dissipation, and the knock-out hole reduces the amount of material used in the enclosure.
[0019] Preferably, the protrusion has an insertion hole inside, the insertion rod is inserted into the insertion hole, and a third sliding hole is provided on the left side of the bottom of the box, and the protrusion is slidably connected inside the third sliding hole.
[0020] By adopting the above technical solution, the insertion hole facilitates the installation of the insertion rod, and the third sliding hole facilitates the movement of the protrusion.
[0021] Preferably, the ventilation duct is fixedly connected to both sides of the outside, and the protective cover is provided with slots on both sides of the inside. The plugs are inserted into the slots, and the ventilation duct is fixedly connected to the middle, and the motor is fixedly connected inside the mounting ring.
[0022] By adopting the above technical solution, the slots facilitate the installation of the plug-in blocks, and the mounting rings facilitate the installation of the motor.
[0023] Preferably, a through hole is provided on the upper front side of the housing, the rack plate is slidably connected inside the through hole, a second sliding hole is provided on the top of the housing, and the connecting block is slidably connected inside the second sliding hole.
[0024] By adopting the above technical solution, the rack plate can be moved by setting through holes, and the connecting block can be moved by setting a second sliding hole.
[0025] Preferably, extension blocks are fixedly connected to both outer sides of the connecting block, and mounting holes are opened on both inner sides of the two extension blocks. The two positioning plates are inserted into any two of the mounting holes. An adjustment hole is opened on the outer side of the connecting block. The two positioning plates and the guide plate are slidably connected inside the adjustment hole. A first positioning hole is opened on the front outer side of the two frames. Multiple positioning blocks are inserted into multiple first positioning holes. A second positioning hole is opened on the lower outer side of the two frames.
[0026] By adopting the above technical solution, the installation of the positioning plate is facilitated by setting positioning holes, and the installation of the positioning plate is facilitated by setting the first positioning hole and the second positioning hole.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. When disassembling a damaged electrical component, the present invention first holds the component, then moves the two side clamps outward, causing the connecting plate and sliding block to move outward synchronously, so that the connecting rod pushes the rotating plate to rotate around the connecting ring, while squeezing multiple first springs. After the clamps separate, the component can be taken out. During installation, the clamps are separated and the component is placed. After releasing, the first springs reset and fix the clamps. This structure facilitates quick disassembly and assembly of electrical components in the power metering box, reduces reliance on professional personnel, saves labor costs, and improves maintenance efficiency.
[0029] 2. When installing electrical components, the present invention first opens the box door and starts the motor. The motor drives the first bevel gear to rotate, which in turn drives the second bevel gear and the transmission rod to rotate. The spur gear on the transmission rod drives the rack plate to move forward. The rack plate pushes the moving plate and the mounting block forward to the front of the box through the connecting block. After the motor is stopped, the component is installed on the mounting block. After the installation is completed, the motor is started again to reset the moving plate. This mechanism makes it easy to move the component to the front of the box for operation, reduces the difficulty of reaching into the box, saves assembly and disassembly time, and improves work efficiency.
[0030] 3. When the cable is connected, the movable protrusion moves the movable block and the sealing plate to the left, exposing the wire hole. At the same time, it squeezes the telescopic rod and compresses the second spring. When the protrusion moves to the insertion rod position, it aligns the insertion hole with the insertion rod and pushes the push block to insert the insertion rod into the insertion hole, thus completing the limiting of the sealing plate. The cable can then be threaded. When not in use, the cable is removed, the insertion rod is removed, and the second spring pushes the sealing plate to reset and seal the wire hole. This structure facilitates repeated opening and closing of the wire hole, improves wiring flexibility, and avoids the hidden dangers caused by long-term opening.
[0031] 4. When the present invention is dissipating heat, the motor is started, and the right side drives the rotating disk and fan blades to rotate. The external air is filtered by the dustproof plate and then sent into the box through the ventilation plate to dissipate heat for the electrical components. At the same time, the protective cover is installed by aligning the plug and the slot to prevent rainwater from entering and ensure safe heat dissipation even in rainy weather. This heat dissipation method is more effective than traditional heat dissipation holes, and it takes into account both ventilation and protection, thus extending the service life of the power metering box.
[0032] 5. When viewing the external values of electrical components inside the electricity metering box, this invention first moves the baffle so that the plug is inserted from the first positioning hole into the second positioning hole. Simultaneously, another baffle is operated to move the positioning plate relative to it, compressing the third spring so that it is lifted after disengaging from the mounting hole. This lifts the magnifying glass to the outside of the transparent window. After aligning with the mounting hole, the positioning plate is released, and the third spring returns to its fixed position. The reading can be clearly obtained through the magnifying glass without opening the box door, avoiding safety hazards and environmental influences, and improving the accuracy and convenience of the reading. Attached Figure Description
[0033] Figure 1 This is a perspective view of the present invention;
[0034] Figure 2 This is a schematic diagram of the thread hole structure of the present invention;
[0035] Figure 3 This is a schematic diagram of the electrical component structure of the present invention;
[0036] Figure 4 This is a schematic diagram of the ventilation panel structure of the present invention;
[0037] Figure 5 This is a schematic diagram of the disassembled structure of the air inlet shroud of the present invention;
[0038] Figure 6 This is a schematic diagram of the motor structure of the present invention;
[0039] Figure 7 This is a schematic diagram of the disassembled baffle structure of the present invention;
[0040] Figure 8 This is a schematic diagram of the disassembled structure of the electrical components of the present invention;
[0041] Figure 9 This is a schematic diagram of the connecting ring structure of the present invention;
[0042] Figure 10 This is a schematic diagram of the rotating plate structure of the present invention;
[0043] Figure 11 This is a schematic diagram of the disassembled structure of the protective cover of the present invention;
[0044] Figure 12 This is a schematic diagram of the slot structure of the present invention;
[0045] Figure 13 for Figure 6 Enlarged view of the structure at point A in the middle;
[0046] Figure 14 for Figure 6 Enlarged view of the structure at point B;
[0047] Figure 15 for Figure 7 Enlarged view of the structure at point C;
[0048] Figure 16 for Figure 7 Enlarged view of the structure at point D.
[0049] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Box body; 3. Box door; 4. Transparent window; 5. Spot-welded mesh; 6. Knockout hole; 7. Protective shell; 8. Mounting block; 9. Electrical component; 10. Connecting ring; 11. Rotating plate; 12. Connecting rod; 13. Sliding block; 14. Limiting block; 15. Limiting groove; 16. First spring; 17. Connecting plate; 18. Clamping plate; 19. First sliding hole; 20. Slot; 21. Motor; 22. First bevel gear; 23. Second bevel gear; 24. Transmission rod; 25. Spur gear; 26. Rack plate; 27. Connecting block; 28. Moving plate; 29. Through hole; 30. Second sliding hole; 31. Threading hole; 32. Telescopic rod; 33. Second spring; 3 4. Moving block; 35. Protrusion; 36. Sealing plate; 37. Push block; 38. Insert rod; 39. Insertion hole; 40. Ventilation duct; 41. Mounting ring; 42. Motor; 43. Rotating disk; 44. Fan blade; 45. Connecting block; 46. Adjustment hole; 47. Dustproof plate; 48. Ventilation plate; 49. Insert block; 50. Protective cover; 51. Slot; 52. Third sliding hole; 53. Extension block; 54. Mounting hole; 55. Adjustment block; 56. Sliding rod; 57. Guide block; 58. Third spring; 59. Positioning plate; 60. Guide plate; 61. Frame; 62. Magnifying glass; 63. First positioning hole; 64. Baffle; 65. Positioning block; 66. Second positioning hole; 67. Guide groove. Detailed Implementation
[0050] The following is in conjunction with the appendix Figure 1 -Appendix Figure 16 This application will be described in further detail below. Example
[0051] Please see the appendix Figure 1 -Appendix Figure 8A modular electricity metering box includes a support frame 1, with a box body 2 fixedly connected to the top of the support frame 1. The support frame 1 allows the box body 2 to be lifted off the ground, preventing rainwater from entering the box body 2. A heat dissipation mechanism is installed on the left side of the box body 2 to facilitate heat dissipation from the inside of the box body 2. An adjustment mechanism is provided on the top of the box body 2 to adjust the position of a movable plate 28 inside the box body 2. The movable plate 28 is located inside the box body 2, and mounting blocks 8 are fixedly connected to both sides of the movable plate 28. Multiple mounting blocks 8 have internal disassembly and assembly mechanisms for quick disassembly and assembly of electrical components 9. Electrical components 9 are mounted on the front side of the multiple mounting blocks 8. A wire hole 31 is provided on the lower left side of the box body 2 for wire threading. Hole 31 facilitates cable entry and exit. A sealing mechanism is installed inside the cable hole 31 to ensure proper sealing. A door 3 is installed on the front exterior of the enclosure 2. Transparent windows 4 are installed on both sides of the right side door 3, allowing for easy viewing of the interior of the enclosure 2. Digital magnification mechanisms are installed outside the two transparent windows 4. A spot-welded mesh 5 is installed on the right exterior of the enclosure 2 to facilitate heat dissipation and ventilation. Knockout holes 6 are located on the upper part of the spot-welded mesh 5 on the right exterior of the enclosure 2. The knockout holes 6 reduce the overall weight of the enclosure 2. Especially in large or heavy-duty metering boxes, well-designed holes can effectively reduce material usage, thereby lowering production and transportation costs.
[0052] The disassembly and assembly mechanism includes a connecting ring 10, which is disposed inside multiple mounting blocks 8. Rotating plates 11 are rotatably connected to both outer sides of the connecting ring 10. Connecting rods 12 are rotatably connected to both outer sides of the two rotating plates 11. Sliding blocks 13 are provided on the outer sides of the multiple connecting rods 12. Limit blocks 14 are fixedly connected to the top of each of the two sliding blocks 13. First springs 16 are fixedly connected to both outer sides of the two sliding blocks 13. The bottoms of the multiple first springs 16 are fixedly connected to the inner sides of the mounting blocks 8. Connecting plates 17 are fixedly connected to the front outer sides of each of the two sliding blocks 13. Clamping plates 18 are fixedly connected to the top of each of the two connecting plates 17. Anti-slip grooves are provided on the outer sides of each of the two clamping plates 18. The clamping plates 18 and anti-slip grooves... To improve the stability of the mounting block, first sliding holes 19 are provided on both sides of the outer side of the mounting block 8. Two connecting plates 17 are slidably connected inside the two first sliding holes 19. The first sliding holes 19 facilitate the movement of the connecting plates 17. The two clamping plates 18 are made of rubber. The rubber material is soft and will not damage the appearance of the electrical components 9. Limiting grooves 15 are provided on both sides of the inner side of the mounting block 8. Two limiting blocks 14 are slidably connected inside the two limiting grooves 15. The limiting grooves 15 facilitate the movement of the limiting blocks 14. Guide grooves 67 are provided on both sides of the inner side of the two sliding blocks 13. Multiple connecting rods 12 are slidably connected inside the multiple guide grooves 67. The guide grooves 67 facilitate the movement of the connecting rods 12.
[0053] Specifically, when disassembling the damaged electrical component 9, the maintenance personnel should first hold the component 9 in place to prevent it from shaking and causing secondary damage during the loosening process. Then, the operator moves the clamping plates 18 on both sides, causing them to move synchronously to both sides in opposite directions. During this process, because the clamping plates 18 are fixedly connected to the two external connecting plates 17, when the clamping plates 18 move, they also cause the two connecting plates 17 to unfold parallel to both sides. Furthermore, when the two connecting plates 17 move, they simultaneously move their bases... The two sliding blocks 13, which are fixedly connected, slide to both sides. During this outward sliding, the four connecting rods 12, which are externally slidably connected, move synchronously within the four guide grooves 67 on both sides of the two sliding blocks 13. The movement of the four connecting rods 12 further drives the two externally fixed rotating plates 11, enabling them to rotate around the connecting ring 10, thus providing greater operating space for the separation of the clamping plate 18. Simultaneously, during the movement of the sliding blocks 13, they also compress the multiple first springs 16 installed externally, causing the first springs 1... 6. Under the action of external force, elastic deformation occurs and elastic potential energy is accumulated. As the two clamping plates 18 continue to unfold to both sides, when they are completely separated from the outer sides of the electrical component 9, the electrical component 9 loses its clamping constraint. At this time, the damaged electrical component 9 can be easily removed from the device and replaced. During the installation of the electrical component 9, the operator needs to repeat the above steps, but in the opposite direction. First, push the two clamping plates 18 to separate them from each other. After forming a suitable clamping gap, accurately place the new electrical component 9 in the middle position of the two clamping plates 18. Then, slowly release the clamping plates 18, and on the outside... Under the reaction force of multiple first springs 16, the two sliding blocks 13 automatically reset under the elastic force, thereby driving the four connecting rods 12, the two rotating plates 11 and the two connecting plates 17 to return to their initial positions in sequence, so that the two clamping plates 18 gradually approach and finally clamp the electrical component 9, completing the fixed installation. Through the above design, when the electrical component 9 inside the power metering box is damaged, maintenance personnel can quickly complete the disassembly and installation of the electrical component 9 without complicated tools, reducing the over-reliance on professional technicians, reducing manual maintenance costs and improving the efficiency of overall maintenance work.
[0054] Please see the appendix Figure 2 - Appendix Figure 11The adjustment mechanism includes a motor 21, which is located on the top left side of the housing 2. A first bevel gear 22 is fixedly connected to the output end of the motor 21. A second bevel gear 23 is meshed with the lower part of the first bevel gear 22. A transmission rod 24 is fixedly connected inside the second bevel gear 23. A spur gear 25 is fixedly connected to the lower part of the transmission rod 24. A rack plate 26 is meshed with the outside of the spur gear 25. A connecting block 27 is fixedly connected to the lower part of the rack plate 26. The bottom of the connecting block 27 is fixedly connected to the top of the moving plate 28. A protective shell 7 is provided on the top of the housing 2. The protective shell 7 serves to protect the motor 21. A slot 20 is provided on the top left side of the housing 2, and the protective shell 7 is inserted into the slot 20. The slot 20 facilitates the installation of the protective shell 7. A through hole 29 is provided on the upper front side of the housing 2, and the rack plate 26 is slidably connected inside the through hole 29. The through hole 29 facilitates the movement of the rack plate 26. A second sliding hole 30 is provided on the top inside the housing 2, and the connecting block 27 is slidably connected inside the second sliding hole 30. The second sliding hole 30 facilitates the movement of the connecting block 27.
[0055] Specifically, when installing electrical components 9 inside the electricity metering box, the operator first needs to open the box door 3, then start the motor 21. The motor 21 drives the first bevel gear 22, which is fixedly connected to the output end, to rotate. The rotation of the first bevel gear 22 drives the second bevel gear 23, which is meshed with it at the bottom, to rotate. When the second bevel gear 23 rotates, the transmission rod 24, which is fixedly connected inside it, will also rotate synchronously. A spur gear 25 is fixedly connected to the outside of the transmission rod 24. Therefore, the rotation of the transmission rod 24 will directly drive the spur gear 25 to rotate. As the spur gear 25 rotates, the externally meshing rack plate 26 will move forward linearly. The movement of the rack plate 26 will further drive the connecting block 27, which is fixedly connected at the bottom, to move forward synchronously. At the same time, the connecting block 27 will drive the moving plate 28, which is fixedly connected at the bottom, to move forward as a whole during its movement. The mounting blocks 8 installed on both sides of the outside of the moving plate 28 are fixedly connected to the moving plate 28. This mechanism moves synchronously with the movement of the movable plate 28. Finally, the mounting block 8 moves from the rear end of the box 2 to the front end. At this point, the operator can immediately stop the motor 21, keeping the movable plate 28 at the front end. In this state, the exterior of the mounting block 8 is fully exposed to the front of the box 2. Maintenance personnel do not need to put their hands inside the box 2; they can directly and accurately install the electrical component 9 onto the preset mounting position on the exterior of the mounting block 8 from the front end of the box 2. After the installation of the electrical component 9 is completed, the operator restarts the motor 21 to reset the movable plate 28 and the mounting block 8. Through the above structure, when installing the electrical component 9 inside the electricity metering box, the problem of maintenance personnel having to put their hands inside the box 2 and the limited operating space during traditional installation can be solved. This reduces the difficulty of operation during installation and disassembly, saves a lot of manual time, and thus improves installation efficiency.
[0056] Please see the appendix Figure 4 -Appendix Figure 12The sealing mechanism includes a telescopic rod 32, which is fixedly connected to the bottom left side of the housing 2. A second spring 33 is sleeved on the outside of the telescopic rod 32. A movable block 34 is fixedly connected to the top of the telescopic rod 32, and a protrusion 35 is fixedly connected to the top of the movable block 34. The protrusion 35 facilitates the operator's use. A sealing plate 36 is fixedly connected to the right side of the movable block 34. The sealing plate 36 is made of rubber and seals the wire hole 31. The sealing plate 36 is slidably connected. Inside the wire hole 31, a rubber sealing plate 36 can be installed to improve the sealing effect of the wire hole 31. A push block 37 is slidably connected to the lower left side of the box body 2. An insertion rod 38 is fixedly connected inside the push block 37. An insertion hole 39 is opened inside the protrusion 35. The insertion rod 38 is inserted into the insertion hole 39 to restrict the position of the protrusion 35. A third sliding hole 52 is opened on the bottom left side of the box body 2. The protrusion 35 is slidably connected inside the third sliding hole 52. The third sliding hole 52 facilitates the movement of the protrusion 35.
[0057] Specifically, when connecting the cable through the through hole 31, the operator first needs to move the protrusion 35 located next to the through hole 31, pushing the protrusion 35 to move the bottom fixedly connected movable block 34 to the left. During the leftward movement of the movable block 34, the movable block 34 will move the outer right fixedly connected sealing plate 36 together, thereby gradually opening the through hole 31, so that the subsequent cable wiring work can proceed smoothly. At the same time, as the movable block 34 moves, the outer left fixedly connected telescopic rod 32 will also be squeezed, causing the telescopic rod 32 to deform, which in turn causes the outer sleeved second spring 33 to undergo elastic deformation. When the protrusion 35 moves to the left to the position of the insertion rod 38, the operator stops moving further, and at this time the sealing plate 36 is fully exposed to the through hole 31, so that the through hole 31 can be used for cable laying smoothly. During this process, the operator needs to align the insertion hole 39 opened inside the protrusion 35 with the insertion rod 38. Next, push the push block 37, so that the push block 37 moves synchronously with the insertion rod 38 until the insertion rod 38... The cable is fully inserted into the insertion hole 39 inside the protrusion 35, thereby completing the limiting operation of the sealing plate 36 and fixing it in place. During cable routing, the operator smoothly inserts the required cable into the interior of the housing 2 through the cable threading hole 31. At this time, due to the limiting of the sealing plate 36, the cable threading hole 31 is kept open, facilitating the smooth introduction of the cable. When the cable threading hole 31 is no longer needed, the operator can remove the cable from the cable threading hole 31, and then operate the push block 37 again to push the insertion rod 38 out of the protrusion 35. When the device disengages from hole 39 and releases the limit switch, the second spring 33, after being compressed, releases its elastic potential energy, driving the sealing plate 36 to return to its original position, thereby sealing the wiring hole 31. This prevents potential hazards such as dust and debris from entering through holes that have been exposed for a long time. Through this design, the wiring hole 31 of the electricity metering box can be easily opened for cable wiring during use; when not in use, the hole can be easily resealed, avoiding the traditional method of opening the hole only once in electricity metering boxes, thus improving the flexibility and safety of the equipment.
[0058] Please see the appendix Figure 3 -Appendix Figure 10The heat dissipation mechanism includes a ventilation duct 40, which is fixedly connected to the outer left side of the enclosure 2. A ventilation plate 48 is installed inside the right side of the ventilation duct 40 to facilitate the delivery of outside air into the enclosure 2. A dustproof plate 47 is installed inside the left side of the ventilation duct 40 to prevent dust from entering the enclosure 2. A motor 42 is located in the middle of the ventilation duct 40. A rotating disk 43 is fixedly connected to the output end of the motor 42 on its right side. Fan blades 44 are fixedly connected to the outer perimeter of the rotating disk 43. The ventilation duct 40 is covered with a protective cover 50, which protects the ventilation duct 40 and allows it to dissipate heat normally even in rainy weather. The ventilation duct 40 is fixedly connected to both sides of the outside with plugs 49. The protective cover 50 is provided with slots 51 on both sides of the inside. The plugs 49 are inserted into the slots 51. The slots 51 facilitate the installation of the plugs 49. The ventilation duct 40 is fixedly connected to the middle with a mounting ring 41. The motor 42 is fixedly connected inside the mounting ring 41. The mounting ring 41 facilitates the fixation of the motor 42.
[0059] Specifically, when performing heat dissipation operations inside the housing 2, the motor 42 is first started. After being powered on, the motor 42 begins to run. Since its right output end is fixedly connected to the rotating disk 43, it drives the rotating disk 43 to rotate continuously. As the rotating disk 43 rotates, the fan blades 44 fixedly connected to its outer perimeter rotate synchronously. During the rotation, the fan blades 44 generate airflow, continuously drawing in external air. At this time, the air enters through the dustproof plate 47 installed on the left side inside the ventilation duct 40. The dustproof plate 47 can block dust, particulate impurities, and fine foreign matter mixed in with the external air. The air entering the enclosure 2 is relatively clean, and the filtered air is delivered to the interior of the enclosure 2 through the ventilation plate 48 to ventilate and dissipate heat for the electrical components 9, so that the electrical components 9 can maintain a reasonable operating temperature during long-term operation. When installing the protective cover 50 on the outside of the ventilation duct 40, the slots 51 on both sides of the inside of the protective cover 50 need to be aligned with the plugs 49 that are fixedly connected to both sides of the outside of the ventilation duct 40. Then, by pushing, the plugs 49 are firmly inserted into the slots 51, thus completing the quick installation of the protective cover 50. Once completed, the protective cover 50 effectively covers the outside of the ventilation duct 40, providing not only physical protection for the ventilation duct 40 but also playing a crucial role in inclement weather. Especially in rainy weather, the protective cover 50 prevents rainwater from entering the ventilation duct 40, thus avoiding the risk of rainwater seeping into the interior of the enclosure 2 and causing corrosion, short circuits, or damage to the electrical components 9. Simultaneously, due to the dual function of ventilation and isolation in the design of the protective cover 50, even with the protective cover 50 installed, air can still smoothly enter the ventilation duct 40 and, after being filtered by the dustproof plate 47, enter the interior of the enclosure 2. Therefore… The heat dissipation operation is not hindered. As a result, the heat dissipation mechanism can not only maintain good ventilation and heat dissipation, but also provide safety protection in rainy weather, preventing rainwater from entering and causing hidden dangers. Through the above structural design, compared with the traditional heat dissipation method that only relies on heat dissipation holes for air convection, this method improves the heat dissipation effect, enabling the electrical components 9 inside the box 2 to maintain a stable temperature environment during operation. At the same time, the protective cover 50 added to the outside of the ventilation duct 40 can effectively block rainwater, dust and other adverse external factors from entering, while maintaining stable air circulation, thereby extending the service life of the electricity metering box.
[0060] Please see the appendix Figure 7 - Appendix Figure 16The digital magnification mechanism includes a connecting block 45, which is fixedly connected to the middle of two transparent windows 4. An adjusting block 55 is slidably connected inside the connecting block 45. A slide rod 56 is fixedly connected to the middle of the adjusting block 55. Guide blocks 57 are slidably connected to both sides of the slide rod 56. A third spring 58 is fixedly connected to the middle of the two guide blocks 57 and is sleeved in the middle of the slide rod 56. A positioning plate 59 is fixedly connected to the front of the two guide blocks 57. A guide plate 60 is fixedly connected to the front of the adjusting block 55. Frames 61 are fixedly connected to both sides of the bottom of the guide plates 60. Magnifying glasses 62 are installed in the middle of both frames 61. The magnifying glasses 62 facilitate magnification of the values displayed externally by the electrical components 9. Baffles 64 are provided on the front of the two frames 61 to protect the magnifying glasses 62. Positioning blocks 65 are fixedly connected to both sides, and multiple positioning blocks 65 are set inside both sides of the two frames 61. Extension blocks 53 are fixedly connected to both sides of the connecting block 45. Mounting holes 54 are opened on both sides of the two extension blocks 53. Two positioning plates 59 are inserted into any two mounting holes 54. The mounting holes 54 facilitate the installation of the positioning plates 59. Adjustment holes 46 are opened on the outside of the connecting block 45. The two positioning plates 59 and the guide plate 60 are slidably connected inside the adjustment holes 46. The adjustment holes 46 facilitate the movement of the positioning plates 59 and the guide plate 60. First positioning holes 63 are opened on the front side of the outside of the two frames 61. Multiple positioning blocks 65 are inserted into multiple first positioning holes 63. Second positioning holes 66 are opened on the lower side of the outside of the two frames 61. The first positioning holes 63 and the second positioning holes 66 facilitate the installation of the positioning blocks 65.
[0061] Specifically, when viewing the values displayed on the external screen of the electrical component 9 through the transparent window 4, firstly, the movable baffle 64, along with the positioning blocks 65 fixedly connected to its two external sides, needs to be operated together to disengage the positioning blocks 65 from the two first positioning holes 63. After completing this step, the operator removes the baffle 64 as a whole, and then accurately inserts the positioning blocks 65 into the two second positioning holes 66, thereby repositioning the baffle 64. The disassembly and reinsertion of the other baffle 64 is exactly the same. Next, the operator needs to move the two positioning plates 59 relative to each other. During the relative movement of the two positioning plates 59, the two guide blocks 57 fixedly connected to their bottoms will move synchronously. During relative movement, the two guide blocks 57, while undergoing relative displacement, exert a squeezing effect on the third spring 58 fixedly connected in the middle, causing the third spring 58 to undergo elastic deformation and temporarily store elastic potential energy. When the tops of the two positioning plates 59 gradually disengage from the middle position of the mounting holes 54 opened inside the two extension blocks 53, the two positioning plates 59 can be pushed upwards accordingly. At this time, the positioning plates 59 will drive the connecting block 45 and guide plate 60 fixedly connected to their external front sides to move upwards together. During the upward movement of the guide plate 60, it will further drive the frame 61 fixedly connected to its bottom sides to rise as a whole, thereby realizing the synchronous upward displacement of the two frames 61. During movement, the two internally installed magnifying glasses 62 will also move upwards. When the two magnifying glasses 62 move to their corresponding positions outside the transparent window 4, the operator can proceed to the next step of fixing them. At this time, simply align the two positioning plates 59 with the mounting holes 54 opened on the outside of the two extension blocks 53, then hold the two magnifying glasses 62 by hand and release the positioning plates 59. Under the reaction force of the third spring 58, the two positioning plates 59 can automatically insert into their corresponding mounting holes 54, thereby fixing the position of the magnifying glasses 62. After completing the above steps, the operator can clearly observe the numbers displayed on the outside of the electrical components 9 inside the housing 2 through the cooperation of the transparent window 4 and the magnifying glasses 62. This method of observation allows for readings without directly opening the cabinet door 3 or reaching inside the cabinet 2, greatly improving operational safety and convenience. This structure not only enhances the intuitiveness and accuracy of numerical observation but also avoids potential safety hazards caused by frequent opening of the cabinet door 3. It also reduces the adverse effects of external dust or moisture entering the cabinet 2 on the internal electrical components 9. In particular, the design of the magnifying glass 62 ensures that even if the display size of the electrical components 9 is small or their installation location is deep, the operator can still clearly identify the values from a distance, avoiding misjudgments or misreadings due to unclear observation. This further improves the accuracy of data reading and the overall ease of operation.
[0062] The implementation principle of this application embodiment is as follows: When disassembling the damaged electrical component 9, first hold the damaged electrical component 9 and then move the clamping plates 18 on both sides. The two clamping plates 18 move to both sides, causing the two externally fixed connecting plates 17 to move to both sides synchronously. When the two connecting plates 17 move to both sides, they cause the two bottom fixedly connected sliding blocks 13 to move to both sides. When the two sliding blocks 13 move to both sides, they cause the four externally slidably connected connecting rods 12 to move synchronously in the guide grooves 67 opened on both sides inside the two sliding blocks 13. When the four connecting rods 12 move to both sides, they cause the two externally fixedly connected rotating plates 11 to rotate outside the connecting ring 10. At the same time, the two sliding blocks 13 move to both sides. Multiple first springs 16, which are fixed to the outside, are compressed to deform the first springs 16. When the two clamps 18 separate from the outside sides of the electrical component 9, the damaged electrical component 9 can be taken out and replaced. During installation, the above steps are repeated. When the two clamps 18 separate from each other, the electrical component 9 is placed in the middle of the two clamps 18. Then, the two clamps 18 are released. Under the reaction force of the first springs 16, the two clamps 18 are reset to fix the electrical component 9. This makes it easy to quickly install and remove the electrical component 9 when it is damaged inside the power metering box, reducing the dependence on professional maintenance personnel, reducing labor costs, and thus improving maintenance efficiency.
[0063] When installing electrical components 9 inside the electricity metering box, firstly, open the box door 3, then start the motor 21. The motor 21 drives the first bevel gear 22, which is fixedly connected to the output end, to rotate. The rotation of the first bevel gear 22 drives the second bevel gear 23, which is meshed with the lower part, to rotate. The rotation of the second bevel gear 23 drives the transmission rod 24, which is fixedly connected internally, to rotate. The rotation of the transmission rod 24 drives the spur gear 25, which is fixedly connected externally, to rotate. The rotation of the spur gear 25 drives the rack plate 26, which is meshed with the externally, to move forward. The movement of the rack plate 26 drives the connecting block 27, which is fixedly connected at the lower part, to move forward synchronously. At the same time, the movement of the connecting block 27 also drives the moving plate 28, which is fixedly connected at the bottom, to move forward. The mounting blocks 8, which are fixedly connected to both sides of the outer side of the movable plate 28, are moved. The motor 21 is stopped when the mounting blocks 8 are moved from the inside of the box 2 to the front inside of the box 2. Then, electrical components 9 are installed on the outside of the mounting blocks 8. After installation, the motor 21 is restarted to reset the movable plate 28. This makes it easy to move the movable plate 28 and mounting blocks 8 inside the box 2 from the inside of the box 2 to the front inside of the box 2 when installing electrical components 9 inside the box. Maintenance personnel can operate directly from the outside or front of the box 2, reducing the difficulty of reaching into the inside of the box 2, saving installation and disassembly time, and improving work efficiency.
[0064] When connecting the cable through the wire hole 31, the moving protrusion 35 first moves the moving block 34, which is fixedly connected to the bottom, to the left. As the moving block 34 moves, it also moves the sealing plate 36, which is fixedly connected to the outer right side. Simultaneously, the moving block 34 presses against the telescopic rod 32, which is fixedly connected to the outer left side, causing the telescopic rod 32 to deform under force, and simultaneously causing the externally sleeved second spring 33 to deform as well. The movement stops when the protrusion 35 reaches the position of the insertion rod 38. At this point, the sealing plate 36 exposes the wire hole 31. Then, the insertion hole 39 inside the protrusion 35 is aligned with the insertion rod 38. Finally, the push block 37 is pushed, moving the insertion rod 38 so that it inserts into the protrusion. The sealing plate 36 can be limited by the insertion hole 39 inside the protrusion 35. Finally, the cable can be threaded into the inside of the box 2 through the wire hole 31. When the wire hole 31 is not in use, the cable can be taken out from inside the wire hole 31. Then, the push block 37 is moved to disengage the plug 38 from the insertion hole 39 inside the protrusion 35. At this time, the sealing plate 36 is reset under the reaction force of the second spring 33, and the wire hole 31 is sealed. This allows the wire hole 31 to be easily opened for cable wiring when in use, and can be resealed when not in use, avoiding the hidden dangers caused by the hole being open for a long time. Unlike the traditional method of opening the hole only once, this method improves the flexibility of the power metering box.
[0065] When dissipating heat inside the housing 2, the motor 42 is started first. The motor 42 drives the rotating disk 43, which is fixedly connected to the output end on the right, to rotate. The rotating disk 43 drives the fan blades 44, which are fixedly connected to the outer perimeter, to rotate. The rotation of the fan blades 44 draws in external air through the dustproof plate 47 installed on the left side inside the ventilation duct 40. The dustproof plate 47 is used to filter the drawn-in air. The filtered air is then delivered to the interior of the housing 2 through the ventilation plate 48 to dissipate heat from the electrical components 9 inside the housing 2. When installing the protective cover 50 outside the ventilation duct 40, the slots 51 on both sides of the protective cover 50 are first connected to the two outer sides of the ventilation duct 40. Align the side-fixed connecting plug 49, and then insert the plug 49 into the slot 51 to complete the installation of the protective cover 50. Installing the protective cover 50 on the outside of the ventilation duct 40 allows the heat dissipation mechanism to continue to dissipate heat even on rainy days, preventing rainwater from entering the interior of the electricity metering box. This facilitates the heat dissipation of the electricity metering box, unlike the traditional method of heat dissipation through ventilation holes. This method has a better heat dissipation effect. At the same time, installing the protective cover 50 on the outside of the ventilation duct 40 can prevent rainwater from entering the interior of the box 2, maintaining good ventilation and heat dissipation while also providing isolation and protection, thereby improving the service life of the electricity metering box.
[0066] When viewing the values displayed on the outside of the electrical component 9 through the transparent window 4, firstly, the movable baffle 64, along with the positioning blocks 65 fixedly connected to both sides, is disengaged from the two first positioning holes 63. Then, after removing the baffle 64, the two positioning blocks 65 are inserted into the two second positioning holes 66. The operation of the other baffle 64 is the same. Next, the two positioning plates 59 are moved relative to each other. This relative movement of the two positioning plates 59 causes the two guide blocks 57 fixedly connected to the bottom to move relative to each other. The relative movement of the two guide blocks 57 compresses the third spring 58 fixedly connected to the middle, causing the third spring 58 to deform under force. Then, when the tops of the two positioning plates 59 disengage from the middle of the two mounting holes 54 inside the two extension blocks 53, the two positioning plates 59 can be moved upwards, along with the guide plate 60 fixedly connected to the front side of the connecting block 45. As the guide plate 60 moves upwards, the frame 61 fixedly connected to both sides of the bottom moves upwards. The two frames 61 move upwards, along with the two magnifying glasses 62 fixedly connected internally. When the two magnifying glasses... When the magnifying glass 62 is moved to the outside of the two transparent windows 4, the two positioning plates 59 can be aligned with the two mounting holes 54 on the outside of the two extension blocks 53. Then, by holding the two magnifying glasses 62 and releasing the two positioning plates 59, under the reaction force of the third spring 58, the two positioning plates 59 are inserted into the corresponding two mounting holes 54, thus fixing the position of the two magnifying glasses 62. Subsequently, with the cooperation of the two magnifying glasses 62, the operator can view the values displayed on the outside of the electrical components 9 inside the cabinet 2 through the two transparent windows 4. The values displayed on the outside of the electrical components 9 inside the cabinet 2 can be clearly observed from the outside of the cabinet 2 without directly opening the cabinet door 3 or reaching into the cabinet 2 to complete the reading. This structure not only improves the intuitiveness and accuracy of numerical observation, but also avoids the safety hazards caused by frequently opening the cabinet door 3 and reduces the impact of environmental dust or moisture entering the cabinet 2 on the components. At the same time, the setting of the magnifying glass 62 makes the values clearly identifiable even at a small display size or a long distance, further reducing the misreading rate and improving the convenience of operation.
Claims
1. A modular electricity metering box, comprising a support frame (1), characterized in that, The bracket (1) is fixedly connected to the top of the box (2). A heat dissipation mechanism is installed on the left side of the box (2). An adjustment mechanism is set on the top of the box (2). A movable plate (28) is set inside the box (2). Mounting blocks (8) are fixedly connected to both sides of the movable plate (28). A disassembly and assembly mechanism is set inside the multiple mounting blocks (8). Electrical components (9) are set on the front side of the multiple mounting blocks (8). A wire hole (31) is opened on the lower left side of the box (2). A sealing mechanism is set inside the wire hole (31). A door (3) is installed on the front side of the box (2). A transparent window (4) is installed on both sides of the right side of the door (3). A digital magnification mechanism is set outside the two transparent windows (4). The disassembly and assembly mechanism includes a connecting ring (10), which is located inside multiple mounting blocks (8). Rotating plates (11) are rotatably connected to both sides of the outer side of the connecting ring (10). Connecting rods (12) are rotatably connected to both sides of the outer side of the two rotating plates (11). Sliding blocks (13) are provided on the outer side of the multiple connecting rods (12). Limit blocks (14) are fixedly connected to the top of the two sliding blocks (13). First springs (16) are fixedly connected to both sides of the outer side of the two sliding blocks (13). The bottom of the multiple first springs (16) is fixedly connected to both sides of the inner side of the mounting block (8). Connecting plates (17) are fixedly connected to the front side of the outer side of the two sliding blocks (13). Clamping plates (18) are fixedly connected to the top of the two connecting plates (17). Anti-slip grooves are provided on the outer side of the two clamping plates (18). Guide grooves (67) are provided on both sides of the inner side of the two sliding blocks (13). Multiple connecting rods (12) are slidably connected inside the multiple guide grooves (67). The sealing mechanism includes a telescopic rod (32), which is fixedly connected to the bottom left side of the box (2). A second spring (33) is sleeved on the outside of the telescopic rod (32). A movable block (34) is fixedly connected to the top of the telescopic rod (32). A protrusion (35) is fixedly connected to the top of the movable block (34). A sealing plate (36) is fixedly connected to the right side of the movable block (34). The sealing plate (36) is made of rubber. The sealing plate (36) is slidably connected to the inside of the wire hole (31). A push block (37) is slidably connected to the lower left side of the box (2). An insert rod (38) is fixedly connected inside the push block (37).
2. The modular energy metering box according to claim 1, characterized in that, The adjustment mechanism includes a motor (21), which is located on the top left side of the housing (2). The output end of the motor (21) is fixedly connected to a first bevel gear (22). The lower part of the first bevel gear (22) is meshed with a second bevel gear (23). The second bevel gear (23) is fixedly connected to a transmission rod (24). The lower part of the transmission rod (24) is fixedly connected to a spur gear (25). The external part of the spur gear (25) is meshed with a rack plate (26). The lower part of the rack plate (26) is fixedly connected to a connecting block (27). The bottom of the connecting block (27) is fixedly connected to the top of the moving plate (28).
3. A modular energy metering box according to claim 1, characterized in that, The heat dissipation mechanism includes a ventilation duct (40), which is fixedly connected to the outer left side of the housing (2). A ventilation plate (48) is installed inside the right side of the ventilation duct (40), and a dustproof plate (47) is installed inside the left side of the ventilation duct (40). A motor (42) is provided in the middle of the ventilation duct (40), and a rotating disk (43) is fixedly connected to the output end of the motor (42). Fan blades (44) are fixedly connected to the outer periphery of the rotating disk (43), and a protective cover (50) is provided on the outside of the ventilation duct (40).
4. A modular energy metering box according to claim 1, characterized in that, The digital magnification mechanism includes a connecting block (45), which is fixedly connected to the middle of the two transparent windows (4). An adjusting block (55) is slidably connected inside the connecting block (45). A slide rod (56) is fixedly connected to the middle of the adjusting block (55). Guide blocks (57) are slidably connected to both sides of the slide rod (56). A third spring (58) is fixedly connected to the middle of the two guide blocks (57). The third spring (58) is sleeved on the middle of the slide rod (56). 57) Positioning plates (59) are fixedly connected to the front of the exterior of the adjustment block (55), and guide plates (60) are fixedly connected to the front of the exterior of the adjustment block (55). Frames (61) are fixedly connected to both sides of the bottom of the guide plates (60). Magnifying glasses (62) are installed in the middle of the two frames (61). Baffles (64) are provided on the front of the exterior of the two frames (61). Positioning blocks (65) are fixedly connected to both sides of the exterior of the two baffles (64). Multiple positioning blocks (65) are arranged on both sides inside the two frames (61).
5. A modular energy metering box according to claim 1, characterized in that, The mounting block (8) has first sliding holes (19) on both sides of its exterior. The two connecting plates (17) are slidably connected inside the two first sliding holes (19). The two clamping plates (18) are made of rubber. The mounting block (8) has limit grooves (15) on both sides of its interior. The two limit blocks (14) are slidably connected inside the two limit grooves (15). The top of the box (2) is provided with a protective shell (7). The top left side of the box (2) is provided with a slot (20). The protective shell (7) is inserted into the slot (20). The right side of the box (2) is provided with a spot-welded mesh (5). The upper part of the spot-welded mesh (5) is provided with a knock-out hole (6). The knock-out hole (6) is located on the right side of the box (2).
6. A modular energy metering box according to claim 2, characterized in that, The protrusion (35) has an insertion hole (39) inside, and the insertion rod (38) is inserted into the insertion hole (39). The bottom left side of the box (2) has a third sliding hole (52), and the protrusion (35) is slidably connected inside the third sliding hole (52).
7. A modular energy metering box according to claim 3, characterized in that, The ventilation duct (40) is fixedly connected to two external sides with plugs (49), and the protective cover (50) is provided with slots (51) on both internal sides. The plugs (49) are inserted into the slots (51). The ventilation duct (40) is fixedly connected to the middle with an installation ring (41), and the motor (42) is fixedly connected inside the installation ring (41).
8. A modular energy metering box according to claim 2, characterized in that, The upper front side of the box body (2) is provided with a through hole (29), the rack plate (26) is slidably connected inside the through hole (29), the top of the box body (2) is provided with a second sliding hole (30), and the connecting block (27) is slidably connected inside the second sliding hole (30).
9. A modular energy metering box according to claim 4, characterized in that, The connecting block (45) is fixedly connected to the extension blocks (53) on both sides of the outside. The two extension blocks (53) are provided with mounting holes (54) on both sides of the inside. The two positioning plates (59) are inserted into any two mounting holes (54). The connecting block (45) is provided with an adjustment hole (46) on the outside. The two positioning plates (59) and the guide plate (60) are slidably connected inside the adjustment hole (46). The two frames (61) are provided with a first positioning hole (63) on the front side of the outside. The multiple positioning blocks (65) are inserted into the multiple first positioning holes (63). The two frames (61) are provided with a second positioning hole (66) on the lower side of the outside.