An intelligent electric meter with an overload protection device

Abstract

The present invention discloses an intelligent electric meter with an overload protection device, which relates to the technical field of electric energy meters. The intelligent electric meter includes a meter body and a wiring seat. A power monitoring module is provided at the bottom of the meter body. A quick installation component and a positioning component for positioning the quick installation component are provided on the back side of the meter body. A limiting component is provided between the meter body and the wiring seat. The quick installation component includes a dovetail guide groove and a limiting seat. A dovetail slider is slidably fitted in the dovetail guide groove, and the dovetail slider is fixedly connected to the limiting seat. The positioning component 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 formed on the side surface of the positioning column. When disassembling and assembling the meter body in the present invention, it facilitates the installation and disassembly of the meter body, avoids frequent disassembly and assembly of wires, reduces the risk of electric shock, provides effective protection to the meter body in case of overload or fire, and effectively reduces the damage to the meter body and the circuit caused by overload or fire.

Description

Technical Field

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

[0002] With the continuous growth of global energy demand and the accelerated construction of smart grids, traditional electric energy meters have been difficult to meet the increasingly complex and diverse electricity management needs. Intelligent electric energy meters have emerged as the key technical means to achieve refined electricity management, improve energy use efficiency, and promote sustainable energy development. However, when the circuit is overloaded, it will damage the internal components of the electric energy meter and may even cause a fire.

[0003] 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 lower end of the outer side of the electric meter body through a buckle. The bottom of the sheath is successively provided with a live wire inlet hole, a neutral wire inlet hole, a live wire outlet hole, a neutral wire outlet hole, and a clamping hole. A fire extinguishing mechanism is arranged in the clamping hole through a screw. An installation groove is opened 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 communicated with the installation groove. A spring pressing mechanism for opening the fire extinguishing mechanism is hinged at the inner bottom of the installation groove. The lower end of the electric meter body is located inside the installation groove. A first conductive block and a second conductive block are fixedly connected to the bottom of the electric meter body. However, the overload protection achieved by the melting of the fuse has poor stability.

[0004] Moreover, when disassembling and assembling the electric energy meter, it is necessary to disassemble and assemble the meter body and the wires connected to the meter body again, which increases the risk of electric shock. In addition, when the circuit is overloaded, the high temperature generated by the overload is likely to damage the components in the electric energy meter body and even easily cause a fire, resulting in damage to the meter body and the circuit. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects, and provide an intelligent electric energy meter with an overload protection device, which provides effective protection for the meter body when overloaded, facilitates the installation and disassembly of the meter body when disassembling and assembling the meter body, and avoids the frequent disassembly and assembly of wires, reducing the risk of electric shock. It can effectively reduce the damage to the meter body and the circuit when overloaded, and can effectively solve the problems in the background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: An intelligent electric energy meter with an overload protection device, including a meter body and a wiring seat, and a power monitoring module is provided at the bottom of the meter body;

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

[0008] The quick - installation component includes 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 component includes a side seat and a positioning hole. A positioning post is provided at the bottom of the side seat, and a positioning groove is provided on the side surface of the positioning post;

[0010] The positioning hole is opened on the top surface of the limit seat. A guide hole is opened on the side surface 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 provided on the side surface of the movable plate, and an electromagnet is provided on the side surface of the limit seat. The electromagnet corresponds to the permanent magnet block in position.

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

[0013] Preferably, the wiring seat is of an L - shaped structure. Export grooves and import grooves are linearly arrayed on both sides of the wiring seat respectively. Conductive sheets are provided in the export grooves, and conductive rings are provided in the import grooves. The export grooves correspond to the conductive blocks, and the import grooves correspond to the conductive columns. Pressing studs are threadedly connected to the side surfaces of the export grooves and the import grooves. Fixed seats are provided on both sides of the wiring seat, and fixing holes are opened on the fixed seats.

[0014] Preferably, the dovetail guide groove is opened on the back side of the meter body, and 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 opened on the mounting seats.

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

[0016] Preferably, both ends of the movable plate are slidably connected to through - grooves opened on the mounting seats provided on both sides.

[0017] Preferably, the limiting component includes a guide seat and a driving motor. The guide seat is provided on the back side of the wiring seat. A guiding seat is slidably sleeved outside the guide seat, and the guiding seat is fixedly connected to the back side of the meter body.

[0018] Preferably, tooth grooves are equally spaced on the inner side of the guide seat. A gear meshes with the outside of the tooth grooves. The output shaft of the driving motor is fixedly connected to the center of the gear, and the driving motor is provided on the surface of the guiding 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 mounting surface in the present invention, the input wire and the output wire are connected. By matching the dovetail guide groove with the dovetail slider, the table body is slid downward to make the conductive block match with the lead-out groove and the conductive column match with the lead-in groove, so as to realize the conduction between the table body and the circuit. And the magnetic attraction force between the electromagnet and the permanent magnet is used to drive the movable plate to move, so as to realize the matching of the positioning pin and the positioning groove, and complete the quick installation and fixation of the table body.

[0021] 2. When the circuit has an overload or a fire in the present invention, a magnetic repulsive force is generated between the electromagnet and the permanent magnet so that the positioning pin quickly disengages from the positioning groove. Under the action of the quick stretching and reset of the return spring, the positioning column and the positioning hole are disengaged, and the table body moves upward quickly, the conductive block and the lead-out groove are disengaged, and the conductive column and the lead-in groove are disengaged, so as to realize the quick cut-off between the table body and the wiring seat, achieving the purpose of protecting the table body.

[0022] 3. After the fault or fire is handled in the present invention, the driving motor is used to drive the gear to rotate. The guide seat drives the table body to move downward by the meshing of the gear and the tooth groove, so as to realize the matching of the conductive block and the lead-out groove and the conductive column and the lead-in groove. At the same time, the positioning column and the positioning hole are re-matched. After the table body moves to the position where the positioning pin corresponds to the positioning groove, a magnetic attraction force is generated between the electromagnet and the permanent magnet, driving the positioning pin to match with the positioning groove again to limit the table body, and completing the re-compression and energy storage of the return spring. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0025] Figure 3 is an axonometric structural diagram of the present invention;

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

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

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

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

[0030] Figure 8 is a schematic partial sectional structural diagram of the present invention.

[0031] In the figure: 1. Meter body; 101. Conductive block; 102. Conductive column; 103. Power monitoring module; 2. Wiring base; 201. Export groove; 202. Import groove; 203. Fixed seat; 3. Quick installation component; 301. Dovetail guide groove; 302. Dovetail slider; 303. Limit seat; 304. Mounting seat; 305. Mounting hole; 4. Positioning component; 401. Side seat; 402. Positioning column; 403. Positioning groove; 404. Return spring; 405. Positioning hole; 406. Guide hole; 407. Positioning pin; 409. Movable plate; 410. Permanent magnet block; 411. Electromagnet; 5. Limit component; 501. Guide seat; 502. Guide seat; 503. Tooth groove; 504. Gear; 505. Driving motor. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1-8 , the embodiments of the present invention provide a technical solution: an intelligent electric meter with an overload protection device, including a meter body 1 and a wiring base 2. On both sides of the bottom of the meter body 1, conductive blocks 101 and conductive columns 102 are respectively arranged 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 wiring base 2 is an L-shaped structure. Export grooves 201 and import grooves 202 are respectively arranged in a linear array on both sides of the wiring base 2. Conductive sheets are arranged in the export grooves 201, and conductive rings are arranged in the import grooves 202. During installation, the input wire is inserted into the import groove 202, and the end of the input wire is crimped to the wiring end of the conductive ring by using a crimping stud. The output wire is inserted into the export groove 201, and the output wire is crimped to the wiring end of the conductive sheet by using a crimping stud.

[0034] The export groove 201 corresponds to the conductive block 101, the import groove 202 corresponds to the conductive column 102. Crimping studs are threadedly connected to the sides of both the export groove 201 and the import groove 202. Fixed seats 203 are arranged on both sides of the wiring base 2, and fixing holes are opened on the fixed seats 203. When installing the meter body 1, the conductive block 101 is correspondingly inserted into the export groove 201, the side of the conductive block 101 is attached to the conductive sheet, the conductive column 102 is correspondingly inserted into the import groove 202, the conductive column 102 penetrates through the conductive ring and the side of the conductive column 102 is attached to the inner side of the conductive ring.

[0035] Inside the meter body 1, a carrier communication module and a battery pack are embedded. The carrier communication module is used to upload the collected electricity consumption data to the concentrator, and then the data is processed by the concentrator and uploaded to the system to achieve meter reading management. The battery pack is used to supply power to each electricity-consuming component of the meter body 1.

[0036] On the back side of the meter body 1, a quick installation component 3 and a positioning component 4 for positioning the quick installation component 3 are provided. A limiting component 5 is provided between the meter body 1 and the wiring seat 2. The quick installation component 3 is used for the quick installation of the meter body 1, the positioning component 4 is used for positioning the quick installation component 3, and the limiting component 5 guides and limits the meter body 1 when the meter body 1 and the wiring seat 2 are combined to ensure the accuracy of the corresponding cooperation between the conductive block 101 and the conductive column 102 and the export groove 201 and the import groove 202 respectively.

[0037] The quick installation component 3 includes a dovetail guide groove 301 and a limiting seat 303. The dovetail guide groove 301 is opened on the back side of the meter body 1. The bottom end of the dovetail guide groove 301 extends to the bottom of the back side of the meter body 1. A dovetail slider 302 is slidably fitted in the dovetail guide groove 301. The dovetail slider 302 is fixedly connected to the limiting seat 303. Mounting seats 304 are symmetrically provided on both sides of the limiting seat 303. Mounting holes 305 are opened on the mounting seats 304. When installing the meter body 1, first pass the fixing piece through the mounting holes 305 and fix it on the external mounting surface to realize the installation and fixation of the limiting seat 303. Then, make the dovetail guide groove 301 on the back side of the meter body 1 correspond to the dovetail slider 302, and slide the meter body 1 downward to complete the positioning installation of the meter body 1. And a conductor is laid in the dovetail guide groove 301, and a conductive contact is provided on the dovetail slider 302 to realize the power supply of the battery pack to the electromagnet 411.

[0038] The positioning component 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 opened on the side surface of the positioning column 402. The positioning hole 405 is opened on the top surface of the limiting seat 303. The positioning hole 405 corresponds to the positioning column 402. A guide hole 406 is opened on the side surface of the positioning hole 405. A positioning pin 407 is slidably fitted in the guide hole 406. An activity plate 409 is provided at the end of the positioning pin 407. The two ends of the activity plate 409 are respectively slidably connected to the through grooves opened on the mounting seats 304 on both sides. During the positioning 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 positioning pin 407. By moving the activity plate 409 towards the limiting seat 303, the end of the positioning pin 407 extends into the positioning groove 403, and the locking of the positioning column 402 can be realized to prevent the loosening of the meter body 1.

[0039] The limiting component 5 includes a guide seat 501. The guide seat 501 is arranged on the back side of the wiring seat 2. A guide seat 502 is slidably sleeved outside the guide seat 501. The guide seat 502 is fixedly connected to the back side of the watch body 1. When the watch body 1 moves downward to be docked with the wiring seat 2, the movement of the watch body 1 is guided through the cooperation of the guide seat 501 and the guide seat 502 to achieve quick cooperation.

[0040] A permanent magnet block 410 is arranged on the side of the movable plate 409, and an electromagnet 411 is arranged on the side of the limit seat 303. The electromagnet 411 corresponds to the position of the permanent magnet block 410. After the electromagnet 411 is powered on, a magnetic attraction force is generated between the electromagnet 411 and the permanent magnet block 410 to drive the movable plate 409 to move towards the limit seat 303, so as to realize the cooperation between the positioning pin 407 and the positioning groove 403. After the positioning pin 407 and the positioning groove 403 are completely matched, the electromagnet 411 is powered off accordingly 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 holes 305, and move the movable plate 409 to a state away from the limit seat 303. Then use fasteners to fix the wiring seat 2 on the installation surface through the fixing seat 203, and the limit seat 303 and the wiring seat 2 are vertically corresponding. Secondly, connect the input wire into the corresponding lead-in groove 202, and connect the output wire into the corresponding lead-out groove 201.

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

[0043] During this process, the positioning post 402 slides into the positioning hole 405 and the positioning groove 403 corresponds to the position of the positioning pin 407. At this time, start the electromagnet 411, 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 is matched with the positioning groove 403 to realize the positioning of the positioning post 402, and further realize the fixation of the watch body 1.

[0044] When disassembling the meter body 1 for replacement or maintenance, simply move the movable plate 409 to the side away from the limit seat 303, so that the positioning pin 407 disengages from the positioning groove 403, and then the meter body 1 can be slid upward to completely separate the conductive block 101 from the lead-out groove 201 and the conductive column 102 from the lead-in groove 202. After sliding the meter body 1 upward and taking it out, the meter body 1 can be replaced and maintained. After replacing the new meter body 1, it can be installed according to the above installation method without reinstalling the wires, effectively improving the disassembly and assembly efficiency of the meter body 1 and reducing the risk of electric shock.

[0045] In addition, when the circuit is overloaded, it will cause damage to the internal electrical components of the meter body 1 and generate high temperature, which may trigger 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 outside the meter body 1, and the smoke sensor is used to monitor whether a fire occurs.

[0047] A return spring 404 is sleeved outside the positioning post 402. The top end of the return spring 404 is fixedly connected to the side seat 401. During the process of the meter body 1 moving downward to make the positioning post 402 cooperate with the positioning hole 405, the return spring 404 is gradually compressed, so that the return spring 404 is in an energy storage state to quickly separate the meter body 1 and the wiring seat 2 in case of overload or fire.

[0048] During use, when the meter body 1 slides downward along the dovetail guide groove 301 and the dovetail slider 302, the return spring 404 is gradually compressed. After the positioning pin 407 corresponds to the positioning groove 403, the return spring 404 reaches the maximum energy storage state. In addition to fixing the meter body 1 by the cooperation of the positioning pin 407 and the positioning groove 403, the energy storage state of the return spring 404 is fixed.

[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 there is a fire near the meter body 1. When the above two states occur, an alarm message is sent to an external terminal through the carrier communication module for reminder. At the same time, the electromagnet 411 is activated, so that a strong magnetic repulsive force is instantly generated between the electromagnet 411 and the permanent magnet block 410, causing the permanent magnet block 410 to drive the movable plate 409 to quickly move away from the limiting seat 303, so that the positioning pin 407 quickly disengages from the positioning groove 403. At this time, the reset spring 404 in the compressed energy storage state quickly extends and resets, and the positioning column 402 quickly disengages from the positioning hole 405, causing the meter body 1 to quickly bounce upward, thereby realizing the rapid disconnection between the conductive block 101 and the lead-out groove 201 and between the conductive column 102 and the lead-in groove 202, so as to achieve the rapid separation between the meter body 1 and the terminal block 2 and disconnect the circuit in the meter body 1, achieving the purpose of protecting the meter body 1.

[0050] Moreover, after the meter body 1 and the terminal block 2 are separated, even if the meter body 1 falls downward under its own gravity, during this process, the bottom end of the reset spring 404 first contacts the limiting seat 303, and the reset spring 404 is slightly compressed. At this time, the compression amount of the reset spring 404 is not enough to make the positioning column 402 fully cooperate with the positioning hole 405, that is, the conductive block 101 and the lead-out groove 201 and between the conductive column 102 and the lead-in groove 202 still cannot be conducted.

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

[0052] The limiting component 5 further includes a driving motor 505. Tooth grooves 503 are equidistantly arranged inside the guiding seat 501. A gear 504 is externally engaged with the tooth grooves 503. 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 guiding seat 502.

[0053] In use, after the failure or fire is handled, an instruction is sent to the controller through an external terminal to start the drive motor 505. The drive motor 505 drives the gear 504 to rotate. The gear 504 meshes 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 move downward against the resistance of the return spring 404, enabling the conductive block 101 and the export groove 201, as well as the conductive column 102 and the import groove 202, to cooperate again, so as to realize the re-conduction between the meter body 1 and the circuit. At the same time, the positioning post 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 force between the electromagnet 411 and the permanent magnet 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, the return spring 404 is re-energized again.

[0054] In addition, when the smoke sensor detects a smoke signal and judges a fire, at this time, relying only on the upward elastic force of the return spring 404 on the meter body 1 to separate the meter body 1 from the terminal block 2 is not enough to make the meter body 1 far away from the fire, and after the meter body 1 falls downward, it will approach the fire again, and there is still a fire risk. To solve the above problems:

[0055] After the smoke sensor detects a smoke signal, and after the meter body 1 pops up upward away from the terminal block 2 and then falls downward, the drive motor 505 is started, and the gear 504 and the tooth groove 503 are engaged to drive the meter body 1 to move upward to the highest position of the guide seat 501, so that the meter body 1 is located at the farthest position on the top of the terminal block 2, so as to make the meter body 1 far away from the fire.

[0056] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally 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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