Modular smart grid power metering box

Abstract

The application relates to the field of metering boxes, and particularly discloses a modular intelligent power grid electric energy metering box, which comprises a box body, the box body is internally provided with a main cavity, a plurality of electric meters are arranged in the main cavity, a movable plate is arranged on one side of a rear inner wall in the box body, the plurality of electric meters are arranged on the movable plate, the movable plate can move along the longitudinal direction of the box body, so that the electric meters protrude from the front end surface of the box body, and a translation frame is arranged between the electric meters and the movable plate and can move along the lateral direction of the box body. According to the application, the movable plate can move along the longitudinal direction of the box body, so that the electric meters as a whole protrude from the front end of the box body; a maintenance personnel can directly operate the wiring, the terminal and the switch on the side of the box body, without needing to reach into the box body, so that the field of vision is improved, the risk of electric shock and collision is reduced, and one person can complete the disassembly, assembly and checking, and the application is particularly suitable for the compact metering box scene with multiple meters arranged side by side and small layer spacing.

Description

Technical Field

[0001] This invention relates to the field of metering box technology, and in particular to a modular smart grid power metering box. Background Technology

[0002] Modular smart grid power metering boxes are low-voltage power distribution metering devices designed for smart grids and the Internet of Things (IoT). They employ a three-layer architecture: a basic enclosure, a modular mounting frame, and functional modules. Functions such as incoming line control, power metering (including power meters and current / voltage transformers), communication and data acquisition (supporting remote meter reading and IoT access via HPLC, RS485, and Bluetooth), protection and control (circuit breakers, anti-theft, and overload protection), and wiring terminals are broken down into pluggable modules with standardized interfaces and independent insulated housings. Strong and weak current wiring is separated, allowing for plug-and-play functionality and universal interchangeability. This design enables flexible combination of meter positions and functions in various scenarios, including residential communities and industrial and commercial settings (e.g., initially only metering and wiring are installed, with communication or monitoring modules added later for orderly power consumption, load identification, and fault location). Furthermore, in case of a unit failure, individual modules can be replaced without disassembling the entire enclosure, significantly improving adaptability, anti-theft security, operation and maintenance efficiency, and support for refined smart grid management.

[0003] Existing technology publication number CN122283210A discloses a moisture-proof and dust-proof integrated power metering box. During maintenance, similar operations are required. It mainly includes an outer casing and ventilation holes on the outer casing. Inside the outer casing is an inner casing for sealing and housing the power metering devices. An air handling unit is installed on one side of the inner casing for circulating the internal air. The air handling unit includes a circulation pipe connected to the inner casing and inlet valve assemblies and exhaust valve assemblies installed at both ends of the circulation pipe. By designing the power metering box as a double-layered space structure with an outer and inner casing, and using a sealed design for the power metering devices in the inner casing, the direct intrusion path of external dust and moisture is fundamentally blocked. Simultaneously, the ventilation holes on the outer casing are only used for airflow and heat dissipation within the outer casing space, preventing dust-laden moisture from contacting the internal components of the inner casing. Compared to traditional open structures, this improves the moisture-proof and dust-proof effect of the power metering box and reduces the risk of component corrosion and short circuits.

[0004] In existing power grid metering boxes (such as the one disclosed in the prior art), when the meters are repaired or replaced, the relative positions of multiple meters are fixed. To facilitate operation, it is usually necessary to disassemble one or more meters and also to reach into the box, which is inconvenient. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] This invention provides a modular smart grid energy metering box, which solves the problem of inconvenient maintenance in existing technologies. The specific solution is as follows: This invention provides a modular smart grid electricity metering box, including a box body with a main cavity inside the box body for installing a number of electricity meters. A movable plate is provided on one side of the rear inner wall of the box body, and the electricity meters are installed on the movable plate. The movable plate can move along the longitudinal direction of the box body, so that the electricity meters protrude from the front end face of the box body. A translation frame is also provided between the electricity meters and the movable plate, and the translation frame moves laterally along the box body.

[0007] Preferably, the movable plate has a frame extending toward the rear inner wall of the box. When the frame abuts against the rear inner wall of the box, a storage cavity is formed between the frame, the movable plate and the rear inner wall of the box for storing cables. The storage cavity contains a cable delivery assembly.

[0008] Preferably, the cable feeding assembly includes a rotating frame with two winding rollers. The two ends of the two winding rollers are fixedly connected by baffles. The baffles protrude from the outer wall of the winding rollers to restrict the cable on the winding rollers. At least a portion of the middle section of the cable passes around the two winding rollers in an S-shape. One side of the rotating frame has a slide block. One side of the slide block is slidably connected to the rear inner wall of the housing. The two ends of the rotating frame are hinged to the two ends of the slide block by torsion springs.

[0009] Preferably, the top of the cable has a guide roller, and fixed arms are fixed to both ends of the guide roller. A first slider is fixed to one end of the fixed arm near the rear inner wall of the housing. The rear inner wall of the housing has a first groove, and the first slider is slidably connected to the first groove.

[0010] Preferably, a second slider is fixedly connected to one end of the slide block near the rear inner wall of the housing, and a second sliding groove is provided on the rear inner wall of the housing. The second slider is slidably connected to the second sliding groove. A third slider is fixedly connected to one end of the translation frame near the movable plate, and a third sliding groove is provided on one end of the movable plate near the translation frame.

[0011] Preferably, the main cavity is used to divide the other parts of the enclosure into at least one sub-cavity. The sub-cavity is equipped with a small switch and a main switch. The number of small switches corresponds to the number of electricity meters. The cable at the back of each electricity meter is connected to the small switch in sequence. One end of the cable is connected to the electricity meter and the other end is connected to the switch terminal.

[0012] Preferably, one end of the frame is provided with an open lead wire groove, which allows the cable to pass through between the main cavity and the sub-cavity.

[0013] Preferably, the front end of the movable plate has a handle with a groove inside, the upper and lower ends of the movable plate have inverted trapezoidal limiting blocks, the upper and lower inner walls of the box have slide rails, the limiting blocks are slidably connected to the slide rails, the front end of the slide rails has a blocking part to prevent the movable plate from moving too much, and the blocking part is detachably connected to the front end of the slide rails.

[0014] Preferably, the movable plate has a strip-shaped hole that extends horizontally. One end of the cable extends from the strip-shaped hole to the front end of the movable plate. The front end of the movable plate is also provided with a snap-fit ​​piece, which is installed on the movable plate by bolts. The bottom of the snap-fit ​​piece has a slot that matches the connector of the cable.

[0015] Preferably, the end of the meter near the cable connector has a wiring groove, the inside of the wiring groove has a crimping block, and the inside of the meter has an installation component. The installation component drives the crimping block to move up and down, pressing the cable connector tightly into the wiring groove.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. This invention allows the movable plate to be moved out along the depth of the box, so that the meter protrudes from the front of the box. Maintenance personnel can directly operate the wiring, terminals and switches from the outside of the box without having to reach inside. This improves visibility and reduces the risk of electric shock and collision. One person can complete the disassembly, assembly and verification. It is especially suitable for compact metering boxes with multiple meters side by side and small layer spacing.

[0017] 2. This invention features a sliding frame on the movable plate that can move laterally along the housing. The meter is fixed to the sliding frame, so the meter can be pulled out as a whole with the movable plate and then finely adjusted laterally. In the case of multiple meters side by side, the meter to be repaired can be moved laterally to the center of the gap between two adjacent meters, completely avoiding obstruction by the adjacent meters. The angle of force application of tools such as screwdrivers, pliers, and temperature guns is no longer affected by the adjacent meters. Actions such as tightening wiring, plugging and unplugging terminals, and checking labels can all be completed in the most convenient way.

[0018] 3. This invention features a movable plate. When the edges of the movable plate abut against the rear wall of the housing, they together form a closed storage cavity. Cables connecting the small switches, main switch, and meter within the cavity pass through the lead-in groove into this cavity and are received by the cable feeding assembly. The two winding rollers of the cable feeding assembly cause the cable to wind in an S-shape. A baffle prevents the cable from slipping off the rollers. The two ends of the rotating frame are hinged to the slide block via torsion springs. When the movable plate is pulled out, the torsion springs release torque, causing the rotating frame to rotate slightly and the slide block to slide on the second slide groove. This allows the S-shaped winding segment to automatically compensate for the pulled-out length, ensuring that the cable is neither taut nor slack and tangled. When the movable plate is pushed back after maintenance, the torsion springs also reverse to retract the cable, maintaining its neatness at all times.

[0019] 4. This invention sets up a main cavity and sub-cavities inside the enclosure. The main switch and the small switches corresponding to each meter are concentrated in the sub-cavities. The rear cables of the meters enter the sub-cavities through the lead-in grooves and are connected to the terminals of the small switches one by one. This layout separates the meters and small switches into two interconnected but functionally independent chambers. When inspecting the meters, the hands operate in the main cavity and the movement does not cross the densely packed switch compartments. Moreover, the opening boundary of the lead-in groove is aligned with the frame, so the cables will not be pulled out when the movable plate is pulled out. The terminal correspondence is clear at a glance, and the verification of phase and switch number is more efficient.

[0020] 5. This invention, through the installation components, ensures that the clamping piece secures the cable connector in place during connection, preventing it from falling back. After aligning the wiring slot with the connector, an electric screwdriver turns the worm gear, which, through the worm wheel, gear rod, and rack transmission, presses the lower pressing piece and the crimping block vertically down, locking the connector in the wiring slot. The self-locking characteristic of the worm wheel and worm gear ensures that the connector will not loosen due to vibration after crimping. The electric drive is more labor-saving and consistent than manual screw crimping. The horizontal movement of the translation frame and the positioning of the clamping piece together compress the alignment and crimping steps into a single action, significantly improving the efficiency of meter changing.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of a single meter of the present invention; Figure 3 This is a perspective view of the housing and movable plate of the present invention; Figure 4 This is a perspective view of the movable plate of the present invention; Figure 5 This is a perspective view of the movable plate and wire feeding assembly of the present invention; Figure 6 This is a perspective view of the wire feeding assembly of the present invention; Figure 7 This is a perspective view of the housing and the blocking part of the present invention; Figure 8 This is a rear perspective view of the meter of the present invention; Figure 9This is a perspective view of the mounting components of the present invention; Figure 10 This is a schematic diagram of the mounting components and cables of the present invention.

[0023] The reference numerals in the attached figures are as follows: 1. Housing; 2. Main cavity; 3. Meter; 4. Movable plate; 5. Translation frame; 6. Frame; 7. Cable; 8. Cable feeding assembly; 9. Sub-cavity; 10. Small switch; 11. Main switch; 12. Lead wire groove; 13. Rotating frame; 14. Winding roller; 15. Baffle; 16. Slide seat; 17. Torsion spring; 18. Second slider; 19. Third slider; 20. Third slide groove; 21. Guide roller; 22. Fixed arm; 23. First slider; 24. Handle; 25. Limit block; 26. Slide rail; 27. Blocking part; 28. Strip hole; 29. ​​Snap-fit ​​piece; 30. Wiring groove; 31. Pressing block; 32. Mounting assembly; 33. Lower pressing part; 34. Rack; 35. Gear rod; 36. Worm gear; 37. Worm; 38. Drive component. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0025] Example 1: As Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a modular smart grid electricity metering box, including a box body 1. The box body 1 has a main cavity 2, and several electricity meters 3 can be installed in the main cavity 2. For example, this embodiment can install six meters, which can be arranged in three rows with two meters in each row. A movable plate 4 is provided on one side of the rear inner wall of the box body 1. Several electricity meters 3 are installed on the movable plate 4. The movable plate 4 can move along the depth direction of the box body 1, so that the electricity meters 3 protrude from the front end of the box body 1, thereby avoiding the need for maintenance personnel to put their arms into the box body 1 to carry out maintenance work, which greatly simplifies the operation. There is also a translation frame 5 between the electricity meters 3 and the movable plate 4. The translation frame 5 moves laterally along the box body 1. The shape of the translation frame 5 matches the outline of the electricity meters 3. The electricity meters 3 and the translation frame 5 are movably connected, which can be a bolt connection.

[0026] like Figure 4 As shown, the movable plate 4 has a frame 6 extending toward the rear inner wall of the box 1. When the frame 6 abuts against the rear inner wall of the box 1, a storage cavity is formed between the frame 6, the movable plate 4 and the rear inner wall of the box 1 for storing the cable 7. The storage cavity has a cable delivery assembly 8.

[0027] like Figure 5As shown, the main cavity 2 and other parts of the housing 1 are divided into at least one sub-cavity 9 by the main cavity 2. The sub-cavity 9 is equipped with a small switch 10 and a main switch 11. The number of small switches 10 corresponds to the number of electricity meters 3. The cable 7 at the rear end of each electricity meter 3 is connected to the small switch in sequence. One end of the cable 7 is connected to the electricity meter 3, and the other end is connected to the terminal of the small switch 10. One end of the frame 6 is provided with an open lead wire groove 12. The lead wire groove 12 is used to allow the cable 7 to pass through between the main cavity 2 and the sub-cavity 9.

[0028] like Figure 6 As shown, the cable feeding assembly 8 includes a rotating frame 13 with two winding rollers 14. The two ends of the two winding rollers 14 are fixedly connected by baffles 15. The baffles 15 protrude from the outer wall of the winding rollers 14 to restrict the cable 7 on the winding rollers 14 and prevent it from detaching. At least a portion of the middle section of the cable 7 is S-shaped and passes around the two winding rollers 14 respectively. One side of the rotating frame 13 has a slide 16. One side of the slide 16 is slidably connected to the rear inner wall of the housing 1. The two ends of the rotating frame 13 are hinged to the two ends of the slide 16 by torsion springs 17.

[0029] like Figure 2 , Figure 6 As shown, a second slider 18 is fixedly connected to one end of the slide block 16 near the rear inner wall of the housing 1. The rear inner wall of the housing 1 has a second sliding groove (not shown in the figure). The second slider 18 is slidably connected to the second sliding groove. A third slider 19 is fixedly connected to one end of the translation frame 5 near the movable plate 4. A third sliding groove 20 is opened on one end of the movable plate 4 near the translation frame 5. The third slider 19 is slidably connected to the third sliding groove 20.

[0030] The top of the cable 7 has a guide roller 21, and the two ends of the guide roller 21 are fixedly connected to a fixed arm 22. The end of the fixed arm 22 near the rear inner wall of the box 1 is fixedly connected to a first slider 23. The rear inner wall of the box 1 has a first groove (not shown in the figure), and the first slider 23 is slidably connected to the first groove.

[0031] like Figure 4 , Figure 7 As shown, the front end of the movable plate 4 has a handle 24, the inside of the handle 24 has a groove, the upper and lower ends of the movable plate 4 have inverted trapezoidal limiting blocks 25, the upper and lower inner walls of the box 1 have slide rails 26, the limiting blocks 25 are slidably connected to the slide rails 26, the front end of the slide rails 26 has a blocking part 27 to prevent the movable plate 4 from moving too much, the blocking part 27 is detachably connected to the front end of the slide rails 26, the specific connection method can be bolt connection.

[0032] like Figure 3 , Figure 4As shown, the movable plate 4 has a strip hole 28 extending horizontally. One end of the cable 7 extends from the strip hole 28 to the front end of the movable plate 4. The front end of the movable plate 4 is also provided with a snap-fit ​​piece 29, which is installed on the movable plate 4 by bolts. The bottom of the snap-fit ​​piece 29 has a slot that matches the connector of the cable 7, so that when the meter 3 is removed, the cable 7 can remain in its original position and will not fall behind the movable plate 4.

[0033] Example 2: Figure 8 , Figure 9 , Figure 10 As shown, the technical solution of this embodiment differs from that of Embodiment 1 in that the end of the meter 3 near the connector of the cable 7 has a wiring groove 30, the wiring groove 30 has a crimping block 31 inside, the meter 3 has an installation component 32 inside, and the installation component 32 drives the crimping block to move up and down, pressing the connector of the cable 7 into the wiring groove 30.

[0034] like Figure 10 As shown, the mounting assembly 32 includes a pressing member 33. The bottom of the pressing member 33 is fixedly connected to the top of the crimping block 31. The pressing member 33 is slidably mounted on the upper part of the wiring groove 30. A rack 34 is fixedly connected to the bottom of the pressing member 33. A gear rod 35 is meshed on one side of the rack 34. The gear rod 35 is rotatably mounted inside the meter 3. A worm gear 36 is located in the middle of the gear rod 35. A worm 37 is meshed on the top of the worm gear 36. The worm 37 is rotatably mounted inside the meter 3. One end of the worm 37 extends to the front end of the meter 3 and is fixedly connected to a driving member 38. The driving member 38 can be driven by an external electric screwdriver or other similar items.

[0035] In the above scheme, by driving the worm gear 37 to rotate, the rack 34 and the pressing member 33 are pressed down, thereby pressing down the crimping block 31. After the wiring slot 30 at the rear end of the meter 3 is aligned with the connector of the cable 7, the connector of the cable 7 can be pressed tightly by the installation component 32 to complete the installation.

[0036] Furthermore, thanks to the function of the snap-fit ​​29, the relative position of the cable 7 can be fixed, and the cable can be quickly installed by the limiting of the translation frame 5.

[0037] Working principle: S1. During daily operation, the movable plate 4 is retracted into the main cavity 2 of the box body 1. The inverted trapezoidal limiting blocks 25 at the upper and lower ends of the movable plate 4 are engaged in the slide rails 26 on the upper and lower inner walls of the box body 1. The blocking part 27 at the front end of the slide rail 26 restricts the front position of the movable plate 4 from the front, and the rear inner wall of the box body 1 restricts the rear position of the movable plate 4 from the rear, so that the movable plate 4 is locked in both directions in the longitudinal direction.

[0038] At this time, the six meters 3 are fixed on the movable plate 4 by the translation frame 5, arranged in three rows and two columns, with their relative positions fixed; the frame 6 around the movable plate 4 extends towards the rear inner wall of the box 1. When the frame 6 abuts against the rear inner wall of the box 1, the frame 6, the movable plate 4, and the rear inner wall of the box 1 together form a closed storage cavity; the cable feeding assembly 8 is arranged in the storage cavity: two winding rollers 14 are fixed on the rotating frame 13, and the two ends of the two winding rollers 14 are fixed by baffles 15, which protrude from the outer wall of the winding rollers 14; the middle section of the cable 7 at the rear end of the meter 3 passes around the two winding rollers 14 in an S-shape, and is restricted by the baffles 15 so that the cable 7 does not detach from the winding rollers 14; the two ends of the rotating frame 13 are hinged to the slide block 16 by the torsion spring 17, and the slide block 16 is slidably connected to the second slide groove of the rear inner wall of the box 1 by the second slider 18; The top of the cable 7 is supported by the guide roller 21. The fixed arms 22 at both ends of the guide roller 21 are hung on the first sliding groove on the inner rear wall of the box 1 via the first slider 23, which slides and guides the upper section of the cable 7. The third slider 19 of the translation frame 5 on the side of the movable plate 4 is engaged in the third slide groove 20 of the movable plate 4, and the lateral position is locked under normal conditions. The snap-fit ​​piece 29 at the front end of the movable plate 4 is fixed by bolts, and its bottom slot matches the connector of the cable 7, so that the connector of the cable 7 is limited to its original position on the front side of the movable plate 4 and will not fall into the back of the movable plate 4 after the meter 3 is removed.

[0039] S2. When a meter 3 needs to be repaired or replaced, the repairman inserts his / her fingers into the handle 24 at the front end of the movable plate 4 (the handle 24 has a groove inside for easy application of force), overcomes the limitation of the front end blocking part 27 of the slide rail 26, and pulls the movable plate 4 outward along the longitudinal direction of the housing 1. The limiting blocks 25 at the upper and lower ends of the movable plate 4 slide out along the slide rail 26, and the meter 3 moves outward with the movable plate 4 until the meter 3 is completely protruding from the front end of the housing 1. The repairman can operate directly from the outside of the main cavity 2 without having to put his / her arms into the housing 1.

[0040] During this pulling process, the actions of each linked component are as follows: The translation frame 5 moves with the third slide groove 20 of the movable plate 4 via the third slider 19. It moves outward synchronously with the movable plate 4, and the relative position of the meter 3 and the translation frame 5 remains unchanged in the depth direction.

[0041] The slide block 16 and the cable feeding assembly 8 are compensated by following the movement: the second slider 18, which is fixed to one end of the slide block 16 near the inner wall of the box 1, slides synchronously on the second groove on the inner wall of the box 1; since the cable 7 is wound in an S-shape on the two winding rollers 14, the cable 7 is pulled out longer when the movable plate 4 is pulled out, and the traction rotating frame 13 rotates slightly around the hinge axis with the slide block 16 in the direction of pulling out. The torsion spring 17 stores energy in this process. The rotation angle of the rotating frame 13 and the sliding amount of the second slider 18 together compensate for the pulling out length of the cable 7, so that the cable 7 is always properly tensioned, neither taut and pulling the terminal of the meter 3, nor loose and piled up in the storage cavity.

[0042] Guide roller 21 follows: The guide roller 21 of the upper section of cable 7 slides on the first groove on the inner rear wall of the housing 1 via the fixed arm 22 and the first slider 23, and always maintains the support and guidance of the upper section of cable 7.

[0043] Horizontal fine adjustment: If the angle of force applied by the screwdriver and pliers is limited due to the obstruction of the adjacent meter 3, the maintenance personnel can push the translation frame 5 horizontally along the third slide groove 20. The third slider 19 slides in the third slide groove 20, so that the meter 3 can be moved horizontally to the left and right after it has been pulled out, and moved to the center of the gap between the two adjacent meters 3, so as to completely avoid the obstruction of the adjacent meter.

[0044] S3. The specific transmission chain of the mounting component 32 is as follows: the bottom of the pressing part 33 is fixedly connected to the top of the pressing block 31. The pressing part 33 is slidably installed on the upper part of the wiring groove 30. The bottom of the pressing part 33 is fixedly connected to the rack 34. The rack 34 meshes with the gear rod 35. The gear rod 35 is rotatably installed inside the meter 3. The middle of the gear rod 35 is fixedly connected to the worm gear 36. The worm gear 36 meshes with the worm 37 above. The worm 37 is rotatably installed inside the meter 3. One end of the worm 37 extends to the front end of the meter 3 and is fixedly connected to the driving part 38. The driving part 38 can be driven by an external electric screwdriver or other similar tools.

[0045] The crimping process is as follows: After the movable plate 4 is pulled out and the horizontal adjustment of the sliding frame 5 is made into place, the cable 7 connector at the rear end of the meter 3 is fixed in the original position on the front side of the movable plate 4 by the slot of the snap-fit ​​piece 29, and will not fall backward. Insert the cable 7 connector into the wiring slot 30 of the meter 3; An external electric screwdriver is inserted into the drive unit 38 and rotates the worm gear 37 in the forward direction. The worm 37 drives the worm wheel 36 to rotate, and the worm wheel 36 drives the gear rod 35 to rotate synchronously. The gear rod 35 converts the rotational motion into linear motion through the rack 34, driving the lower pressing part 33 to slide down along the upper part of the wiring groove 30. The pressing block 31 at the bottom of the pressing member 33 presses down, pressing the cable 7 connector tightly against the bottom of the wiring groove 30; The worm gear 36 and worm 37 have self-locking characteristics, and will not loosen even if there is vibration after crimping, ensuring the reliability of the wiring; Since the snap-fit ​​piece 29 has fixed the relative position of the cable 7 and the translation frame 5 has limited the lateral position of the meter 3, the entire "alignment-crimping" action can be completed in one go, significantly improving the meter replacement efficiency.

[0046] S4. After inspection or replacement is completed: If a horizontal adjustment has been made, first push the translation box 5 back to the center along the third slide 20, and the third slider 19 will return to its original position. Push the movable plate 4 back into the box 1 along the slide rail 26, and the limiting block 25 slides within the slide rail 26; During the push-back process, the torsion spring 17 releases energy, the auxiliary rotating frame 13 swings back, the slide block 16 slides in the opposite direction on the second slide groove, the wire feeding assembly 8 automatically retracts the wire, and the S-shaped winding of the cable 7 returns to the winding roller 14, and the tension is restored to normal. The frame 6 is back against the inner wall of the box 1, and the lead wire groove 12 is realigned with the wire passage of the sub-cavity 9; The front of the movable plate 4 is locked by the blocking part 27 at the front end of the slide rail 26, and the limiting block 25 is locked again, and the entire measuring box returns to its normal storage state.

[0047] If this operation is to replace the meter, when the old meter 3 is removed, the clamping piece 29 has already locked the cable 7 connector in place and prevented it from falling back. After the new meter 3 is installed on the sliding frame 5, it can be directly aligned and crimped without re-organizing the wires.

[0048] In summary, this invention allows the movable plate to extend along the depth of the enclosure, causing the meter to protrude from the front of the enclosure. Maintenance personnel can directly access the wiring, terminals, and switches from the outside of the enclosure without needing to reach inside, improving visibility and reducing the risk of electric shock and impact. A single person can complete the disassembly, assembly, and verification. This is particularly suitable for compact metering boxes with multiple meters side-by-side and small spacing. Furthermore, by adding a lateral sliding frame on the movable plate, the meter is fixed to the sliding frame, allowing the meter to be pulled out along with the movable plate and then re-mounted after being pulled out. By making slight adjustments to the left and right sides, in scenarios with multiple meters side by side, the meter to be repaired can be moved horizontally to the center of the gap between two adjacent meters, completely avoiding obstruction by neighboring meters. The angle of force application of tools such as screwdrivers, pliers, and temperature guns is no longer affected by the neighboring meters. Actions such as tightening wiring, plugging and unplugging terminals, and checking labels can all be completed in the most convenient posture. By setting up a movable plate, when the edges of the movable plate are against the rear wall of the box, they together with the rear wall form a closed storage cavity. The cables between the small switches of the separate cavities, the main switch, and the meters are passed through the lead wire groove into this cavity and received by the cable delivery assembly. The two winding rollers of the cable feeding assembly wind the cable in an S-shape. A baffle prevents the cable from slipping off the rollers. The rotating frame is hinged to the slide block at both ends via torsion springs. When the movable plate is pulled out, the torsion springs release torque, causing the rotating frame to rotate slightly and the slide block to slide on the second groove. This automatically compensates for the pulled-out length of the S-shaped winding segment, ensuring the cable is neither taut nor slack. When the movable plate is pushed back after maintenance, the torsion springs also reverse to retract the cable, maintaining its neatness. By setting up a main chamber and sub-chambers inside the enclosure, the main switch and the individual small switches corresponding to each meter are concentrated in the sub-chambers. The rear cables of the meters enter the sub-chambers through lead-in grooves and connect to the terminals of the small switches one by one. This layout separates the meters and small switches into two interconnected but functionally independent chambers. When maintaining the meters, the hand is in the main chamber. The operation and movement of the device do not cross into the densely populated switch area, and the opening boundary of the lead-in slot is aligned with the frame. When the movable plate is pulled out, the cable will not be pulled out. The terminal correspondence is clear at a glance, and the verification of phase and switch number is more efficient. By setting the installation components, the clamping plate has already locked the cable connector in place during docking and will not fall back. After the wiring slot is aligned with the connector, the electric screwdriver turns the worm gear, and through the worm wheel-gear rod-rack transmission, the lower pressing piece and the crimping block are pressed down vertically, locking the connector in the wiring slot. The self-locking characteristic of the worm wheel and worm gear ensures that it will not loosen due to vibration after crimping. The electric drive is more labor-saving and consistent than manual screw crimping. The horizontal movement of the translation frame and the positioning of the clamping plate together compress the alignment and crimping steps into one action, significantly improving the efficiency of meter changing.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0052] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A modular smart grid electricity metering box, comprising a box body, the box body having a main cavity, the main cavity being used to install a plurality of electricity meters, characterized in that: A movable plate is installed on one side of the rear inner wall of the enclosure. Several electricity meters are mounted on the movable plate. The movable plate can move along the depth of the enclosure, so that the electricity meters protrude from the front face of the enclosure. There is also a sliding frame between the electricity meters and the movable plate. The sliding frame moves laterally along the enclosure. The shape of the sliding frame matches the outline of the electricity meters. The electricity meters are movably connected to the sliding frame. There is a wiring groove at the end of the electricity meter near the cable connector. There is a crimping block inside the wiring groove. There is an installation component inside the electricity meter. The installation component drives the crimping block to move up and down, pressing the cable connector into the wiring groove.

2. The modular smart grid power metering box as described in claim 1, characterized in that: The movable plate has a frame extending towards the rear inner wall of the box. When the frame abuts against the rear inner wall of the box, a storage cavity is formed between the frame, the movable plate and the rear inner wall of the box for storing cables. The storage cavity contains a cable delivery assembly.

3. A modular smart grid energy metering box as described in claim 2, characterized in that: The cable feeding assembly includes a rotating frame with two winding rollers. The two ends of the two winding rollers are fixed by baffles. The baffles protrude from the outer wall of the winding rollers to restrict the cable on the winding rollers. At least a portion of the middle section of the cable passes around the two winding rollers in an S-shape. One side of the rotating frame has a slide block. One side of the slide block is slidably connected to the rear inner wall of the housing. The two ends of the rotating frame are hinged to the two ends of the slide block by torsion springs.

4. A modular smart grid power metering box as described in claim 3, characterized in that: The cable has a guide roller at the top, and fixed arms are fixed to both ends of the guide roller. A first slider is fixed to one end of the fixed arm near the rear inner wall of the box. The rear inner wall of the box has a first groove, and the first slider is slidably connected to the first groove.

5. A modular smart grid energy metering box as described in claim 3, characterized in that: A second slider is fixedly connected to one end of the slide block near the inner rear wall of the housing. The inner rear wall of the housing has a second sliding groove. The second slider is slidably connected to the second sliding groove. A third slider is fixedly connected to one end of the translation frame near the movable plate. A third sliding groove is opened on the end of the movable plate near the translation frame.

6. A modular smart grid energy metering box as described in claim 2, characterized in that: The main cavity is divided into at least one sub-cavity by the main cavity. The sub-cavity is equipped with a small switch and a main switch. The number of small switches corresponds to the number of electricity meters. The cable at the back of each electricity meter is connected to the small switch in sequence. One end of the cable is connected to the electricity meter and the other end is connected to the switch terminal.

7. A modular smart grid energy metering box as described in claim 6, characterized in that: An open lead-in groove is provided at one end of the frame, which allows the cable to pass through between the main cavity and the sub-cavities.

8. A modular smart grid energy metering box as described in claim 1, characterized in that: The movable plate has a handle at the front end, and the handle has a groove inside. The upper and lower ends of the movable plate have inverted trapezoidal limit blocks. The upper and lower inner walls of the box have slide rails. The limit blocks are slidably connected to the slide rails. The front end of the slide rails has a blocking part to prevent the movable plate from moving too much. The blocking part is detachably connected to the front end of the slide rails.

9. A modular smart grid energy metering box as described in claim 1, characterized in that: The movable plate has a strip-shaped hole that extends horizontally. One end of the cable extends from the strip-shaped hole to the front end of the movable plate. The front end of the movable plate is also equipped with a snap-fit ​​piece, which is installed on the movable plate by bolts. The bottom of the snap-fit ​​piece has a slot that matches the connector of the cable.

10. A modular smart grid energy metering box as described in claim 9, characterized in that: The mounting assembly includes a pressing component, the bottom of which is fixedly connected to the top of the crimping block. The pressing component is slidably mounted on the upper part of the wiring groove. A rack is fixedly connected to the bottom of the pressing component. A gear rod is meshed on one side of the rack. The gear rod is rotatably mounted inside the meter. A worm gear is located in the middle of the gear rod. A worm is meshed on the top of the worm gear. The worm is rotatably mounted inside the meter.

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