Intelligent electric meter with overload protection device

Abstract

The invention discloses an intelligent electric meter with an overload protection device, and relates to the technical field of electric energy meters, the intelligent electric meter comprises a meter body and a wire holder, the bottom of the meter body is provided with a power monitoring module, the back side of the meter body is provided with a fast assembly and a positioning assembly used for positioning the fast assembly, and a limiting assembly is arranged between the meter body and the wire holder. The quick assembly assembly comprises a dovetail guide groove and a limiting seat, a dovetail sliding block is arranged in the dovetail guide groove in a sliding fit mode, the dovetail sliding block is fixedly connected with the limiting seat, the positioning assembly comprises a side seat and a positioning hole, a positioning column is arranged at the bottom of the side seat, and a positioning groove is formed in the side face of the positioning column. When the meter body is disassembled and assembled, the meter body is convenient to assemble and disassemble, frequent disassembly and assembly of electric wires are avoided, the electric shock risk is reduced, effective protection is provided for the meter body when overload or fire occurs, and damage of overload or fire to the meter body and lines is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meters, and in particular to an intelligent electric meter with an overload protection device. Background Art

[0002] With the continuous growth of global energy demand and the accelerated advancement of smart grid construction, traditional electricity meters can no longer meet the increasingly complex and diverse electricity management needs. Smart electricity meters have emerged as the times require and have become a key technical means to achieve refined electricity management, improve energy efficiency, and promote sustainable energy development. However, when the circuit is overloaded, the internal components of the electricity meter will be damaged and may even cause a fire.

[0003] A Chinese invention patent with application number 202210960429X discloses an electric meter device with an overload protection function, including an electric meter body, a sheath is clamped on the outer side of the electric meter body near the lower end by a buckle, a live wire inlet hole, a neutral wire inlet hole, a live wire outlet hole, a neutral wire outlet hole and a clamping hole are sequentially provided at the bottom of the sheath, a fire extinguishing mechanism is arranged inside the clamping hole by screws, an installation groove is provided at the top of the sheath, the live wire inlet hole, the neutral wire inlet hole, the live wire outlet hole, the neutral wire outlet hole and the clamping hole are all interconnected with the installation groove, a spring pressure mechanism for opening the fire extinguishing mechanism is hinged on the inner bottom of the installation groove, the lower end of the electric meter body is located inside the installation groove, and a first conductive block and a second conductive block are fixedly connected to the bottom of the electric meter body, but the stability of overload protection achieved by blowing the fuse is poor.

[0004] In addition, when disassembling the electricity meter, it is necessary to disassemble the meter body and the wires connected to the meter body, which increases the risk of electric shock. In addition, when the circuit is overloaded, the high temperature generated by the overload can easily damage the components in the electricity meter body, and even cause fire, causing damage to the meter body and circuits. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a smart meter with an overload protection device, which provides effective protection for the meter body when an overload occurs. When the meter body is disassembled, it is convenient to install and disassemble the meter body, and avoids frequent disassembly of wires, reducing the risk of electric shock. When an overload occurs, the damage to the meter body and the line is effectively reduced, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a smart electric meter with an overload protection device, comprising a meter body and a terminal block, wherein a power monitoring module is provided at the bottom of the meter body;

[0007] A quick-install component and a positioning component for positioning the quick-install component are provided on the back side of the meter body, and a limit component is provided between the meter body and the wiring seat;

[0008] The quick-install assembly comprises a dovetail guide groove and a limit seat, a dovetail slider is slidably fitted in the dovetail guide groove, and the dovetail slider is fixedly connected to the limit seat;

[0009] The positioning assembly includes a side seat and a positioning hole, a positioning column is provided at the bottom of the side seat, and a positioning groove is provided on the side of the positioning column;

[0010] The positioning hole is formed on the top surface of the limiting seat, a guide hole is formed on the side of the positioning hole, a positioning pin is slidably fitted in the guide hole, and a movable plate is provided at the end of the positioning pin;

[0011] A permanent magnet block is arranged on the side of the movable plate, and an electromagnet is arranged on the side of the limit seat, and the electromagnet corresponds to the position of the permanent magnet block.

[0012] Preferably, conductive blocks and conductive columns are provided in a linear array on both sides of the bottom of the meter body, a carrier communication module and a battery pack are embedded inside the meter body, a smoke sensor is provided outside the meter body, and the output end of the power monitoring module is electrically connected to the input end of the meter body.

[0013] Preferably, the terminal block is an L-shaped structure, and an export groove and an import groove are respectively provided on both sides of the terminal block in a linear array, a conductive sheet is provided in the export groove, and a conductive ring is provided in the import groove. The export groove corresponds to the conductive block, and the import groove corresponds to the conductive column. The sides of the export groove and the import groove are both threadedly connected with crimping studs, and fixed seats are provided on both sides of the terminal block, and fixing holes are provided on the fixed seats.

[0014] Preferably, the dovetail guide groove is provided on the back side of the meter body, the bottom end of the dovetail guide groove extends to the bottom of the back side of the meter body, mounting seats are symmetrically provided on both sides of the limit seat, and mounting holes are provided on the mounting seats.

[0015] Preferably, the positioning hole corresponds to the positioning column, a return spring is sleeved on the outside of the positioning column, and the top end of the return spring is fixedly connected to the side seat.

[0016] Preferably, two ends of the movable plate are slidably connected to through slots on the mounting seats on both sides.

[0017] Preferably, the limiting assembly comprises a guide seat and a driving motor, the guide seat is arranged on the back side of the wiring seat, the guide seat is slidably sleeved on the outside of the guide seat, and the guide seat is fixedly connected to the back side of the meter body.

[0018] Preferably, tooth grooves are provided at equal intervals on the inner side of the guide seat, gears are meshed on the outside of the tooth grooves, the output shaft of the drive motor is fixedly connected to the center of the gear, and the drive motor is arranged on the surface of the guide seat.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. After the limit seat and the wiring seat are fixed on the installation surface, the input wires and the output wires are connected, and the dovetail guide groove is matched with the dovetail slider, and the meter body is slid downward to make the conductive block and the lead-out groove match, and the conductive column and the lead-in groove match, so as to realize the conduction between the meter body and the circuit, and utilize the magnetic attraction between the electromagnet and the permanent magnet block to drive the movable plate to move, realize the matching of the positioning pin and the positioning groove, and complete the rapid installation and fixation of the meter body.

[0021] 2. When the circuit is overloaded or on fire, the present invention generates magnetic repulsion between the electromagnet and the permanent magnet block so that the positioning pin quickly disengages from the positioning groove. Under the action of the rapid extension and resetting of the reset spring, the positioning column and the positioning hole disengage, the meter body quickly moves upward, the conductive block and the lead-out groove disengage, and the conductive column and the lead-in groove disengage, thereby achieving rapid disconnection between the meter body and the terminal block, thereby achieving the purpose of protecting the meter body.

[0022] 3. After handling the fault or fire, the present invention utilizes a driving motor to drive the gear to rotate, and utilizes the meshing of the gear and the tooth groove to enable the guide seat to drive the meter body to move downward, thereby realizing the coordination between the conductive block and the lead-out slot, and between the conductive column and the lead-in slot. At the same time, the positioning column and the positioning hole are re-coordinated, and after the meter body moves to the alignment between the positioning pin and the positioning slot, a magnetic attraction is generated between the electromagnet and the permanent magnet block, driving the positioning pin and the positioning slot to coordinate again to limit the meter body, and completing the re-compression and energy storage of the reset spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0025] Figure 3 It is a schematic diagram of the shaft side structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the back structure of the present invention;

[0027] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0028] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0029] Figure 7 It is a schematic diagram of the bottom structure of the present invention;

[0030] Figure 8 It is a schematic diagram of a partial cross-sectional structure of the present invention.

[0031] In the figure: 1. meter body; 101. conductive block; 102. conductive column; 103. power monitoring module; 2. terminal block; 201. lead-out slot; 202. lead-in slot; 203. fixed seat; 3. quick-release assembly; 301. dovetail guide slot; 302. dovetail slider; 303. limit seat; 304. mounting seat; 305. mounting hole; 4. positioning assembly; 401. side seat; 402. positioning column; 403. positioning slot; 404. reset spring; 405. positioning hole; 406. guide hole; 407. positioning pin; 409. movable plate; 410. permanent magnet block; 411. electromagnet; 5. limit assembly; 501. guide seat; 502. guide seat; 503. tooth slot; 504. gear; 505. drive motor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-8 The embodiment of the present invention provides a technical solution: a smart electric meter with an overload protection device, including a meter body 1 and a terminal block 2, the bottom two sides of the meter body 1 are respectively provided with a conductive block 101 and a conductive column 102 in a linear array, the conductive block 101 is electrically connected to the output end of the meter body 1, and the conductive column 102 is electrically connected to the input end of the meter body 1, the terminal block 2 is an L-shaped structure, and the two sides of the terminal block 2 are respectively provided with a lead-out slot 201 and an import slot 202 in a linear array, a conductive sheet is provided in the lead-out slot 201, and a conductive ring is provided in the import slot 202. During installation, the input wire is inserted into the import slot 202, and the end of the input wire is crimped to the terminal of the conductive ring by using a crimping stud, and the output wire is inserted into the lead-out slot 201, and the output wire is crimped to the terminal of the conductive sheet by using a crimping stud.

[0034] The export slot 201 corresponds to the conductive block 101, the import slot 202 corresponds to the conductive column 102, the sides of the export slot 201 and the import slot 202 are both threadedly connected with crimping studs, and both sides of the terminal block 2 are provided with fixing seats 203, and fixing holes are opened on the fixing seats 203. When installing the meter body 1, the conductive block 101 is correspondingly inserted into the export slot 201, and the side of the conductive block 101 is in contact with the conductive sheet, and the conductive column 102 is correspondingly inserted into the import slot 202, and the conductive column 102 passes through the conductive ring and the side of the conductive column 102 is in contact with the inner side of the conductive ring.

[0035] A carrier communication module and a battery pack are embedded inside the meter body 1. The carrier communication module is used to upload the collected power consumption data to the concentrator, which is then processed by the concentrator and uploaded to the system to realize meter reading management. The battery pack is used to supply power to various power-consuming components of the meter body 1.

[0036] A quick-install component 3 and a positioning component 4 for positioning the quick-install component 3 are provided on the back side of the meter body 1. A limit component 5 is provided between the meter body 1 and the terminal socket 2. The quick-install component 3 is used for quick installation of the meter body 1. The positioning component 4 is used for positioning the quick-install component 3. The limit component 5 guides and limits the meter body 1 when the meter body 1 is combined with the terminal socket 2 to ensure the accuracy of the corresponding matching between the conductive block 101 and the conductive column 102 and the outlet groove 201 and the inlet groove 202 respectively.

[0037] The quick-release assembly 3 includes a dovetail guide groove 301 and a limit seat 303. The dovetail guide groove 301 is provided on the back side of the watch body 1. The bottom end of the dovetail guide groove 301 extends to the bottom of the back side of the watch body 1. A dovetail slider 302 is slidably matched in the dovetail guide groove 301. The dovetail slider 302 is fixedly connected to the limit seat 303. Mounting seats 304 are symmetrically provided on both sides of the limit seat 303. The mounting seats 304 are provided with mounting holes 305. When installing the watch body 1, the fixing piece is first fixed to the external mounting surface through the mounting holes 305 to achieve the installation and fixation of the limit seat 303. Then, the dovetail guide groove 301 on the back side of the watch body 1 is correspondingly matched with the dovetail slider 302. The watch body 1 is slid downward to complete the positioning and installation of the watch body 1. A conductor is laid in the dovetail guide groove 301, and a conductive contact is provided on the dovetail slider 302 to enable the battery pack to supply power to the electromagnet 411.

[0038] The positioning assembly 4 includes a side seat 401 and a positioning hole 405. A positioning column 402 is provided at the bottom of the side seat 401. A positioning groove 403 is provided on the side of the positioning column 402. The positioning hole 405 is provided on the top surface of the limiting seat 303. The positioning hole 405 corresponds to the positioning column 402. A guide hole 406 is provided on the side of the positioning hole 405. A positioning pin 407 is slidably matched in the guide hole 406. A movable plate 409 is provided at the end of the positioning pin 407. The two ends of the movable plate 409 are respectively slidably connected with the through grooves on the mounting seat 304 on both sides. During the positioning and installation process of the meter body 1, after the meter body 1 slides downward, the positioning column 402 corresponds to the positioning hole 405, and the positioning groove 403 corresponds to the position of the positioning pin 407. By moving the movable plate 409 toward the limiting seat 303, the end of the positioning pin 407 is extended into the positioning groove 403, so that the locking of the positioning column 402 can be achieved to prevent the meter body 1 from loosening.

[0039] The limiting assembly 5 includes a guide seat 501, which is arranged on the back side of the wiring seat 2. The guide seat 502 is slidably sleeved on the outside of the guide seat 501. The guide seat 502 is fixedly connected to the back side of the meter body 1. When the meter body 1 moves downward to dock with the wiring seat 2, the movement of the meter body 1 is guided by the cooperation of the guide seat 501 and the guide seat 502, thereby achieving quick cooperation.

[0040] A permanent magnet block 410 is provided on the side of the movable plate 409, and an electromagnet 411 is provided on the side of the limit seat 303. The position of the electromagnet 411 corresponds to that of the permanent magnet block 410. After the electromagnet 411 is energized, a magnetic attraction force is generated between the electromagnet 411 and the permanent magnet block 410 to drive the movable plate 409 to move toward the limit seat 303 to achieve the cooperation between the positioning pin 407 and the positioning groove 403. After the positioning pin 407 and the positioning groove 403 are fully cooperated, the electromagnet 411 is powered off to prevent the battery pack from consuming power too quickly.

[0041] During installation, first use fasteners to fix the limit seat 303 on the installation surface through the installation hole 305, and move the movable plate 409 to a state away from the limit seat 303, and then use fasteners to fix the terminal block 2 on the installation surface through the fixed seat 203, and the positions of the limit seat 303 and the terminal block 2 correspond to each other up and down. Secondly, connect the input wires to the corresponding import slot 202, and connect the output wires to the corresponding export slot 201.

[0042] Then, the dovetail guide groove 301 on the back side of the meter body 1 is matched with the dovetail slider 302 on the side of the limit seat 303, and the meter body 1 is slid downward. Under the limiting action of the guide seat 501 and the guide seat 502, the conductive block 101 and the output groove 201 are fully matched, and the conductive column 102 and the import groove 202 are fully matched. The conductive block 101 is electrically connected to the output wire through the conductive sheet, and the conductive column 102 is electrically connected to the input wire through the conductive ring to complete the conduction between the meter body 1 and the circuit.

[0043] During this process, the positioning column 402 slides into the positioning hole 405 and the positioning groove 403 corresponds to the position of the positioning pin 407. At this time, the electromagnet 411 is started, so that a magnetic attraction force is generated between the electromagnet 411 and the permanent magnet block 410. The electromagnet 411 drives the movable plate 409 to move by adsorbing the permanent magnet block 410, so that the positioning pin 407 cooperates with the positioning groove 403 to achieve the positioning of the positioning column 402, and then the watch body 1 is fixed.

[0044] When the meter body 1 is disassembled for replacement or maintenance, it is only necessary to push the movable plate 409 to the side away from the limit seat 303 so that the positioning pin 407 disengages from the positioning slot 403, and the meter body 1 can be slid upward to completely separate the conductive block 101 and the outlet slot 201, and the conductive column 102 and the inlet slot 202 are completely separated. The meter body 1 can be slid upward and taken out to replace and maintain the meter body 1. After replacing the new meter body 1, it can be installed according to the above-mentioned installation method without re-disassembling the wires, which effectively improves the disassembly and assembly efficiency of the meter body 1 and reduces the risk of electric shock.

[0045] In addition, when the circuit is overloaded, the electrical components inside the meter body 1 will be damaged, and high temperature will be generated, causing a fire. Therefore, the following improvements are made:

[0046] A power monitoring module 103 is provided at the bottom of the meter body 1. The output end of the power monitoring module 103 is electrically connected to the input end of the meter body 1. The power monitoring module 103 is used to detect the power of the circuit connected to the meter body 1 to monitor whether the electric energy meter is overloaded. A smoke sensor is provided on the outside of the meter body 1 to monitor whether a fire occurs.

[0047] A return spring 404 is sleeved on the outside of the positioning column 402, and the top of the return spring 404 is fixedly connected to the side seat 401. When the meter body 1 moves downward to make the positioning column 402 and the positioning hole 405 cooperate, the return spring 404 is gradually compressed, so that the return spring 404 is in an energy storage state, so that the meter body 1 and the terminal block 2 can be quickly separated when an overload or fire occurs.

[0048] When in use, as the watch body 1 slides downward using the dovetail guide groove 301 and the dovetail slider 302, the reset spring 404 is gradually compressed. After the positioning pin 407 corresponds to the positioning groove 403, the reset spring 404 reaches the maximum energy storage state. In addition to fixing the watch body 1, the positioning pin 407 and the positioning groove 403 cooperate to fix the energy storage state of the reset spring 404.

[0049] When the power sensor detects that the power in the input circuit of the meter body 1 is greater than the set power threshold, it actively determines that the input circuit of the meter body 1 is overloaded, or when the smoke sensor detects a smoke signal, it determines that a fire occurs near the meter body 1. When the above two states occur, an alarm message is sent to the external terminal through the carrier communication module for reminder, and the electromagnet 411 is started at the same time, so that a strong magnetic repulsion force is instantly generated between the electromagnet 411 and the permanent magnet block 410, so that the permanent magnet block 410 drives the movable plate 409 to move quickly to the side away from the limit seat 303, so that the positioning pin 407 quickly disengages from the positioning groove 403, and the reset spring 404 in the compressed energy storage state quickly stretches and resets, and the positioning column 402 quickly disengages from the positioning hole 405, so that the meter body 1 quickly bounces upward, thereby realizing the rapid separation between the conductive block 101 and the outlet groove 201 and between the conductive column 102 and the inlet groove 202, thereby realizing the rapid separation between the meter body 1 and the terminal block 2, disconnecting the circuit in the meter body 1, and achieving the purpose of protecting the meter body 1.

[0050] Furthermore, after the meter body 1 and the terminal block 2 are separated, even if the meter body 1 falls downward under the action of its own gravity, during this process, the bottom end of the return spring 404 first contacts the limit seat 303, and the return spring 404 is slightly compressed. At this time, the compression amount of the return spring 404 is not enough to make the positioning column 402 completely cooperate with the positioning hole 405, that is, there is still no conduction between the conductive block 101 and the outlet slot 201, and between the conductive column 102 and the inlet slot 202.

[0051] In addition, after the meter body 1 and the terminal block 2 are separated, when the overload fault in the circuit is eliminated, the meter body 1 and the terminal block 2 need to be reconnected manually, which causes inconvenience to the user. Therefore, the following improvements are made:

[0052] The limiting assembly 5 also includes a driving motor 505. The inner side of the guide seat 501 is provided with tooth grooves 503 at equal intervals. The outer side of the tooth grooves 503 is meshed with gears 504. The output shaft of the driving motor 505 is fixedly connected to the center of the gear 504. The driving motor 505 is arranged on the surface of the guide seat 502.

[0053] When in use, after the fault or fire is handled, a command is sent to the controller through the external terminal to start the drive motor 505. The drive motor 505 drives the gear 504 to rotate, and the gear 504 engages with the tooth groove 503 to drive the guide seat 502 to move along the guide seat 501, so that the meter body 1 can overcome the resistance of the reset spring 404 and move downward, so that the conductive block 101 and the outlet groove 201 and the conductive column 102 and the inlet groove 202 cooperate again to achieve the re-connection of the meter body 1 and the circuit. At the same time, the positioning column 402 and the positioning hole 405 cooperate again. After the meter body 1 moves downward to the position corresponding to the positioning pin 407 and the positioning groove 403, the electromagnet 411 is started to generate a magnetic attraction between the electromagnet 411 and the permanent magnet block 410, so that the positioning pin 407 and the positioning groove 403 cooperate again to complete the positioning of the meter body 1, and at the same time complete the re-energy storage of the reset spring 404.

[0054] In addition, when the smoke sensor detects a smoke signal and determines that a fire is present, the upward elastic force of the reset spring 404 on the meter body 1 is sufficient to separate the meter body 1 from the terminal block 2, which is insufficient to keep the meter body 1 away from the fire. After the meter body 1 falls downward, it will approach the fire again, and there will still be a risk of fire. In order to solve the above problems:

[0055] After the smoke sensor detects the smoke signal, and after the meter body 1 pops up away from the terminal block 2 and falls back downward, the driving motor 505 is started, and the meter body 1 is driven to move upward to the highest position of the guide seat 501 through the engagement of the gear 504 and the tooth groove 503, so that the meter body 1 is located at the farthest position on the top of the terminal block 2, so that the meter body 1 is away from the fire.

[0056] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A smart electric meter with an overload protection device, comprising a meter body (1) and a terminal block (2), characterized in that: A power monitoring module (103) is provided at the bottom of the meter body (1); A quick-install component (3) and a positioning component (4) for positioning the quick-install component (3) are provided on the back side of the meter body (1), and a limit component (5) is provided between the meter body (1) and the wiring seat (2); The quick-install assembly (3) comprises a dovetail guide groove (301) and a limit seat (303), a dovetail slider (302) is slidably fitted in the dovetail guide groove (301), and the dovetail slider (302) is fixedly connected to the limit seat (303); The positioning assembly (4) comprises a side seat (401) and a positioning hole (405); a positioning column (402) is provided at the bottom of the side seat (401); and a positioning groove (403) is provided on the side of the positioning column (402); The positioning hole (405) is provided on the top surface of the limiting seat (303), a guide hole (406) is provided on the side of the positioning hole (405), a positioning pin (407) is slidably fitted in the guide hole (406), and a movable plate (409) is provided at the end of the positioning pin (407); A permanent magnet block (410) is provided on the side of the movable plate (409), and an electromagnet (411) is provided on the side of the limit seat (303), and the electromagnet (411) corresponds to the position of the permanent magnet block (410).

2. The smart electric meter according to claim 1, characterized in that: Conductive blocks (101) and conductive columns (102) are respectively provided in a linear array on both sides of the bottom of the meter body (1); a carrier communication module and a battery pack are embedded inside the meter body (1); a smoke sensor is provided outside the meter body (1); and an output end of the power monitoring module (103) is electrically connected to an input end of the meter body (1).

3. The smart electric meter according to claim 2, characterized in that: The wiring seat (2) is an L-shaped structure. The two sides of the wiring seat (2) are respectively provided with an outlet groove (201) and an inlet groove (202) in a linear array. A conductive sheet is provided in the outlet groove (201), and a conductive ring is provided in the inlet groove (202). The outlet groove (201) corresponds to the conductive block (101), and the inlet groove (202) corresponds to the conductive column (102). The sides of the outlet groove (201) and the inlet groove (202) are both threadedly connected with crimping studs. The two sides of the wiring seat (2) are provided with a fixing seat (203), and the fixing seat (203) is provided with a fixing hole.

4. The smart electric meter according to claim 1, characterized in that: The dovetail guide groove (301) is provided on the back side of the meter body (1), and the bottom end of the dovetail guide groove (301) extends to the bottom of the back side of the meter body (1). Mounting seats (304) are symmetrically provided on both sides of the limiting seat (303), and mounting holes (305) are provided on the mounting seats (304).

5. The smart electric meter according to claim 1, characterized in that: The positioning hole (405) corresponds to the positioning column (402), a return spring (404) is sleeved on the outside of the positioning column (402), and the top end of the return spring (404) is fixedly connected to the side seat (401).

6. The smart electric meter according to claim 4, characterized in that: The two ends of the movable plate (409) are respectively slidably connected to through slots on the mounting seats (304) on both sides.

7. The smart electric meter according to claim 1, characterized in that: The limit assembly (5) comprises a guide seat (501) and a drive motor (505); the guide seat (501) is arranged on the back side of the wiring seat (2); the guide seat (502) is slidably sleeved on the outside of the guide seat (501); and the guide seat (502) is fixedly connected to the back side of the meter body (1).

8. The smart electric meter according to claim 7, characterized in that: The inner side of the guide seat (501) is provided with tooth grooves (503) at equal intervals, the outer side of the tooth grooves (503) is meshed with a gear (504), the output shaft of the drive motor (505) is fixedly connected to the center of the gear (504), and the drive motor (505) is arranged on the surface of the guide seat (502).

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