Intelligent metering box and emergency protection mechanism thereof

Abstract

This invention discloses an intelligent metering box and its emergency protection mechanism, relating to the field of metering box technology. It includes a metering box body with an internal partition. A gas storage chamber is located at the front end of the partition, and a power supply and controller are installed on the gas storage chamber. An electrical switch is installed on the partition, and a sealing frame surrounds the electrical switch. Two sliding rods are fixed to the left and right sides of the sealing frame, each with an actuating component and a sliding component. Two fixed rods are located between the two sliding components, and a toggle component for actuating the electrical switch lever is installed on the fixed rods. This intelligent metering box and its emergency protection mechanism, with active protection against leakage fire as its core, constructs a complete "prevention-detection-handling-recovery" protection system. Temperature and smoke sensors inside the sealing frame capture early signs of leakage fire in real time, transmitting the signals to the controller in milliseconds to ensure early detection and handling of abnormal conditions.

Description

Technical Field

[0001] This invention relates to the field of metering box technology, specifically to an intelligent metering box and its emergency protection mechanism. Background Technology

[0002] As core equipment for power distribution system metering and line control, smart metering boxes are widely used in various scenarios such as residential buildings and industrial plants. Their operational safety is directly related to the stability of the power distribution system and the safety of personnel and property. Currently, most smart metering boxes on the market only have basic power metering functions and are significantly lacking in safety protection and emergency response, making it difficult to meet the safety protection needs of complex power usage environments and posing significant safety hazards to equipment operation.

[0003] One obvious drawback is that existing smart metering boxes lack an integrated emergency response mechanism for power outages and fire suppression. When a fire breaks out due to leakage or short circuits caused by aging wiring, the only option is often to manually cut off the power or wait for fire-fighting equipment to intervene. This results in a delayed emergency response, making it difficult to quickly cut off the source of the fire and contain its spread. This can easily lead to the fire spreading, damaging the equipment, or even causing fires in the surrounding area. At the same time, some equipment equipped with simple fire extinguishing devices often uses traditional fire extinguishing agents such as dry powder or water-based agents. After extinguishing the fire, these agents can cause serious corrosion or residual pollution to the delicate electrical components inside the box, making the equipment unusable and significantly increasing maintenance and replacement costs.

[0004] Another significant drawback is the poor adaptability and power-off reliability of existing smart metering boxes, making them difficult to adapt to various specifications of electrical switches and multi-switch linkage scenarios. The power-off mechanisms of existing equipment are mostly fixed structures, unable to be flexibly adjusted according to the position and size of the levers of different electrical switch models. Furthermore, in scenarios with multiple electrical switches, it is often impossible to achieve synchronous and complete power-off of all switches, easily resulting in some lines not being disconnected. This leads to the continued existence of fire hazards, failing to prevent the spread of fire and the risk of electric shock from the source, and making it difficult to ensure the safety of the power distribution system and personnel.

[0005] In view of the shortcomings of the existing technologies, there is an urgent need for a smart metering box and its emergency protection mechanism that can achieve rapid emergency response and has strong adaptability, so as to solve the problems of weak emergency response capability and poor adaptability of existing equipment and improve the safety and reliability of smart metering box operation. Summary of the Invention

[0006] To address the above problems, this invention provides an intelligent metering box and its emergency protection mechanism.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an intelligent metering box and its emergency protection mechanism, including a partition, a gas storage chamber provided at the front end of the partition, and a power supply and a controller installed on the gas storage chamber; An electrical switch is installed on the partition. A sealing frame is provided on the partition around the electrical switch. Two sliding rods are fixed on the left and right sides of the sealing frame. An actuating component and a sliding component are respectively provided on the sliding rods. Two fixed rods are provided between the two sliding components. A toggle component for toggling the electrical switch lever is installed on the fixed rod. A temperature sensor and a smoke sensor are installed on the upper inner side of the sealing frame, and the temperature sensor and the smoke sensor are electrically connected to the controller.

[0008] Preferably, the actuation component includes a clamping block held on the slide rod, an electromagnet is provided at the upper end of the clamping block, an actuation spring is sleeved on the slide rod, and the actuation spring is located between the actuation component and the sliding component.

[0009] Preferably, the sliding component includes a slider slidably connected to a slider rod, the slider having two symmetrically fixed frames, a mounting frame fixed to the left fixed frame, a strong magnet for magnetically fixing to the actuating component being provided inside the mounting frame, and a groove being provided inside the fixed frame.

[0010] Preferably, the two ends of the fixing rod are respectively clamped and fixed with U-shaped fixing clamps. The fixing clamps are provided with sliding grooves. A movable column is slidably connected to the fixing clamps. The movable column is provided with a fixing pin to prevent it from detaching from the fixing clamps. A pressure plate is fixed to the lower end of the movable column. Adjusting springs are symmetrically arranged on the pressure plate. The pressure plate is placed in a groove and can move up and down in the groove.

[0011] Preferably, the actuating assembly includes an L-shaped actuating block, the corner of which is sleeved and fixed to a fixed rod, one end of which has a limiting groove that engages with another fixed rod, and the other end of which is detachably connected to an adjusting block.

[0012] Preferably, the gas storage chamber has an opening at its rear end, a sealing plate is slidably connected to the opening, a protrusion is fixed at the rear end of the sealing plate, the protrusion is engaged between two fixed rods, and two guide grooves fixedly connected to the gas storage chamber are respectively provided on both sides of the sealing plate, and the protrusion is slidably connected to the guide groove.

[0013] Preferably, the gas storage chamber is filled with high-pressure inert gas for fire extinguishing.

[0014] A smart metering box includes a metering box body, with support pillars fixed at the four corners of the partition, the support pillars being fixedly connected to the metering box body, and a gap being left between the partition and the metering box body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This intelligent metering box and its emergency protection mechanism, with active protection against leakage current and fire as its core, construct a complete protection system encompassing "prevention-detection-response-recovery." It achieves passive heat dissipation through the ventilation gap between the partition and the box body, reducing the risk of overheating and fire of electrical components at the source. Temperature and smoke sensors inside the sealed frame capture early signs of leakage current and fire in real time, transmitting signals to the controller in milliseconds to ensure early detection and handling of abnormal conditions. This design completely solves the pain points of traditional metering boxes lacking active protection and risk control, achieving closed-loop management from hazard prevention to emergency response. 2. The core emergency response capability of the device lies in its integrated and coordinated action of power outage and fire extinguishing. When an anomaly is detected, the repulsive force of the electromagnet and the restoring force of the pre-compressed spring combine to form a strong force, pushing the sliding component to move the fixed rod and the toggle component quickly and precisely triggering the electrical switch levers to achieve power outage. In scenarios where multiple switch levers are not on the same straight line, the fine-tuning structure of the movable column and adjusting spring allows the toggle component to smoothly pass over the triggered levers, ensuring that all switches are powered off. At the same time, the movement of the fixed rod simultaneously opens the sealing plate of the gas storage chamber, and high-pressure inert gas instantly fills the chamber, which not only extinguishes the fire quickly but also avoids secondary damage to electrical equipment caused by traditional fire extinguishing agents. After the fire is extinguished, only the reset mechanism and gas replenishment are needed to restore operation, significantly reducing maintenance costs. 3. The adjustable design of the toggle assembly can adapt to electrical switches of different specifications. The clamp-on installation and strong magnetic pre-fixed structure eliminate the need for professional tools during installation and debugging. The modular component design allows for individual replacement of damaged parts, while power redundancy and multiple limit structures avoid the risk of emergency failure. These designs not only improve the versatility of the device in complex environments such as outdoors and in humid conditions, but also significantly reduce long-term operating costs through low-loss operation and easy reset characteristics. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the interior of the metering box body of the present invention; Figure 2 This is a schematic diagram of the interior of the sealing frame of the present invention; Figure 3 This is a schematic diagram of the sealing frame of the present invention; Figure 4 This is a schematic diagram of the overall emergency protection mechanism of the present invention; Figure 5 This is a schematic diagram of the execution component and the sliding component of the present invention; Figure 6 This is an exploded view of the execution component and sliding component of the present invention; Figure 7 This is a schematic diagram of the toggle assembly of the present invention; Figure 8 This is a cross-sectional schematic diagram of the gas storage chamber of the present invention.

[0017] The diagram shows the following components: 1. Metering box body; 2. Partition; 3. Gas storage chamber; 4. Sealing frame; 5. Actuating component; 6. Sliding component; 7. Fixed rod; 8. Actuating component; 21. Support column; 22. Electrical switch; 31. Power supply; 32. Controller; 33. Sealing plate; 41. Slide rod; 42. Temperature sensor; 43. Smoke sensor; 51. Clamping block; 52. Electromagnet; 53. Actuating spring; 61. Slider; 62. Fixed frame; 63. Movable column; 64. Fixed pin; 65. Fixed clamp; 66. Slide groove; 67. Mounting frame; 68. Strong magnet; 81. Actuating block; 82. Limiting groove; 83. Adjusting block; 331. Protrusion; 332. Guide groove; 621. Groove; 631. Pressure plate; 632. Adjusting spring. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A smart metering box and its emergency protection mechanism are disclosed. The box body 1 is a sealed sheet metal structure, which enhances its IP54 waterproof and dustproof capabilities, addressing the problem of moisture and dust accumulation in harsh outdoor environments. The box body 1 has an internal partition 2, which not only physically separates functional areas but also creates ventilation gaps through corner supports 21, allowing air convection to remove heat from electrical components and solving the problem of poor heat dissipation and overheating issues common in traditional boxes. The front end of the partition 2 has a high-pressure sealed gas storage chamber 3 filled with a non-conductive, residue-free high-pressure inert gas (such as argon / nitrogen), preventing secondary damage to electrical equipment caused by traditional dry powder fire extinguishing systems. The gas storage chamber 3 is equipped with a redundant power supply 31 and an AI-integrated controller 32. The power supply 31 ensures the control function remains functional during power outages, while the controller 32 performs millisecond-level signal processing, addressing the problem of delayed emergency response. The partition 2 is equipped with an electrical switch 22 featuring a multi-circuit modular design, which facilitates future maintenance and replacement. A sealing frame 4 surrounds the electrical switch 22 on the partition 2. The sealing frame 4 is made of flame-retardant insulating material, forming a partially enclosed space to effectively prevent the spread of fire outside the enclosure. Two high-precision linear guide rails 41 are fixed to the left and right sides of the sealing frame 4, respectively. Their low resistance characteristics ensure smooth movement of the sliding assembly 6. An actuator 5 and a sliding assembly 6 are respectively mounted on the actuator 5. The dual-power structure of "electromagnet 52 + actuating spring 53" solves the problem of insufficient power for single mechanical triggering. The strong magnetic adsorption design of the sliding component 6 6 achieves pre-tightening energy storage and eliminates the delay during emergency triggering. Two fixed rods 7 are set between the two sliding components 6. The fixed rods 7 are rigidly connected to the sliding components 6 through U-shaped fixing clamps 65 to improve structural stability. The fixed rods 7 are equipped with a toggle component 8 for toggling the lever of the electrical switch 22. Its adjustable design can be adapted to the levers of different switch models, solving the problem of poor device versatility.

[0020] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 The upper inner side of the sealing frame 4 is equipped with a temperature sensor 42 using a high-precision thermistor and a smoke sensor 43 using photoelectric detection. The dual-sensor redundancy detection can effectively avoid the problem of false triggering by a single sensor. The temperature sensor 42 and the smoke sensor 43 are electrically connected to the controller 32. The detection signal can be transmitted in real time and trigger emergency actions. The four corners of the partition 2 are respectively fixed with a support column 21 made of high-strength insulating plastic. The support column 21 is fixedly connected to the metering box body 1. A ventilation gap is left between the partition 2 and the metering box body 1. This design uses natural convection to achieve passive heat dissipation, reducing the risk of overheating and fire of electrical components from the source.

[0021] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 The actuator 5 includes a clamping block 51 clamped on the slide rod 41. The clamping block 51 is made of non-slip and wear-resistant engineering plastic to ensure stable positioning of the actuator 5 on the slide rod 41. An electromagnet 52 driven by DC pulse is provided at the upper end of the clamping block 51, which, together with a strong magnet 68, enables rapid switching between magnetic attraction and repulsion. An actuator spring 53 made of high-elasticity alloy steel is sleeved on the slide rod 41. The actuator spring 53 is located between the actuator 5 and the sliding component 6. The pre-compressed and energy-stored actuator spring 53 and the repulsive force of the electromagnet 52 are superimposed, which can greatly improve the reliability of the triggering power. The sliding component 6 includes a slider 61 slidably connected to the slider 41. The slider 61 is made of lightweight aluminum alloy, which effectively reduces sliding resistance. The slider 61 is provided with two left and right symmetrical fixing frames 62. The left fixing frame 62 is fixed with a mounting frame 67. The mounting frame 67 is fixed with a strong magnet 68 made of neodymium iron boron permanent magnet. The strong magnet 68 provides a stable attraction force to achieve pre-tight fixation between the actuator 5 and the sliding component 6, solving the problem of structural slack before emergency triggering. The fixing frame 62 has a groove 621 inside, which provides a guide space for the movable column 63 to move up and down.

[0022] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 The fixed rod 7 has U-shaped fixing clamps 65 clamped at both ends. The U-shaped structure can adapt to the cylindrical shape of the fixed rod 7, improving the connection stability. The fixing clamp 65 has a sliding groove 66 to provide lateral sliding allowance for the movable column 63. The movable column 63 is slidably connected to the fixing clamp 65. The movable column 63 is provided with a fixing pin 64 to prevent it from detaching from the fixing clamp 65, improving structural safety. The lower end of the movable column 63 is fixed with a pressure plate 631. The pressure plate 631 is symmetrically provided with adjusting springs 632. The pressure plate 631 is placed in a groove 621 and can move up and down in the groove 621. This design realizes the up and down fine adjustment of the fixed rod 7, solves the adaptation problem that the levers used for switching electricity on multiple electrical switches 22 are not on the same straight line, and ensures that the toggle assembly 8 can trigger all switches in sequence.

[0023] Please see Figure 4 and Figure 7 The actuating assembly 8 includes an L-shaped actuating block 81, the L-shaped structure serving both fixing and actuating functions; the corner of the actuating block 81 is sleeved and fixed to the fixing rod 7, and one end of the actuating block 81 has a limiting groove 82, which engages with another fixing rod 7 to ensure the stability of the dual-rod linkage; the other end of the actuating block 81 is detachably connected to an adjusting block 83, which can adjust the extension length according to the height and thickness of the switch lever, further improving the versatility of the device.

[0024] Please see Figure 1 , Figure 2 and Figure 8The gas storage chamber 3 has an opening at its rear end, and a sealing plate 33 with a high-pressure resistant rubber gasket is slidably connected to the opening to ensure the airtightness of the chamber. A protrusion 331 is fixed at the rear end of the sealing plate 33, and the protrusion 331 is engaged between two fixed rods 7 to achieve mechanical linkage. Two guide grooves 332 are respectively provided on both sides of the sealing plate 33 and are fixedly connected to the gas storage chamber 3. The protrusion 331 is slidably connected to the guide grooves 332 to prevent the sealing plate 33 from shifting and causing sealing failure. The gas storage chamber 3 is filled with high-pressure inert gas for fire extinguishing.

[0025] Furthermore, through a closed-loop linkage of "detection-control-execution-fire extinguishing," the various components achieve millisecond-level power cutoff and inert gas extinguishing in the event of a fire caused by leakage current, solving the core problems of traditional metering boxes lacking active protection and having delayed fire extinguishing. The modular design and fine-tuning adaptation function greatly improve the versatility and reliability of the device. The combination of heat dissipation gaps and flame-retardant seals reduces the risk of fire from the source, ultimately forming a full-chain protection system of "prevention-monitoring-emergency-fire extinguishing," effectively ensuring the safe operation of the metering box.

[0026] When using this invention: The first stage is the preliminary debugging and preparation, the core of which is to complete the positioning adjustment and pre-fixation of each component to ensure that the emergency mechanism can be triggered normally. First, according to the position of the lever of the electrical switch 22, the initial positions of the actuator 5, the sliding assembly 6, and the toggle assembly 8 are adjusted accordingly, so that the toggle assembly 8 is precisely engaged with the lever of the electrical switch 22, ensuring that the subsequent toggle action is effective. Then, the extension length of the adjusting block 83 on the toggle assembly 8 is adjusted to ensure that the toggle assembly 8 can stably contact and toggle the lever of the electrical switch 22 when it moves with the sliding assembly 6. At the same time, the sealing plate 33 on the gas storage chamber 3 is engaged between the two fixed rods 7 by the protrusion 331, so that the sealing plate 33 is sealed and fitted with the opening of the gas storage chamber 3, ensuring that there is no leakage of high-pressure inert gas; the sliding assembly 6 is attracted and fixed to the actuator 5 by the strong magnet 68. At this time, the actuator spring 53 between the actuator 5 and the sliding assembly 6 is compressed and stored, completing the pre-trigger preparation for the emergency action. The overall debugging does not require professional tools and is easy to operate.

[0027] The second stage is normal operation monitoring. During this stage, the device is in standby mode, simultaneously completing heat dissipation protection and anomaly monitoring. When the metering box body 1 is running, the support pillars 21 at the four corners of the partition 2 create ventilation gaps between the partition 2 and the metering box body 1. Air convection carries away the heat generated by the electrical switches 22 and various electrical components inside the sealed frame 4, preventing heat accumulation that could lead to aging of the wiring, softening of the insulation layer, and other hidden dangers, thus reducing the risk of leakage and fire at the source. At the same time, the temperature sensor 42 and the smoke sensor 43 on the upper inner side of the sealed frame 4 work continuously, monitoring the temperature changes and smoke generation inside the box in real time. Both are electrically connected to the controller 32, which can synchronously transmit the monitoring data to the controller 32. The controller 32 is powered by the power supply 31 to maintain standby mode, ensuring that no abnormal signals are missed.

[0028] The third stage is emergency response coordination. When a potential fire hazard due to electrical leakage occurs inside the box, the device automatically initiates an integrated power-off and fire-extinguishing action. When an electrical leakage fire occurs in the internal circuit of the metering box body 1 or the electrical switch 22, high temperature and smoke will be rapidly generated inside the sealing frame 4. The temperature sensor 42 and the smoke sensor 43 immediately capture the abnormal signal and transmit the signal to the controller 32 in milliseconds. The controller 32 responds quickly, controlling the electromagnet 52 of the actuator 5 to be energized, causing the electromagnet 52 to generate magnetic poles that repel the strong magnet 68. The repulsive force and the restoring force of the actuator spring 53 are superimposed, pushing the sliding component 6 to slide rapidly along the slide rod 41. The sliding assembly 6 drives the fixed rod 7 and the toggle assembly 8 to move synchronously. The toggle block 81 of the toggle assembly 8 precisely acts on the lever of the electrical switch 22 to complete the initial power cut-off. When multiple electrical switch 22 levers are not on the same straight line, the lever is tilted downward after being toggled, which generates an upward force on the toggle block 81, causing the fixed rod 7 and the fixed clamp 65 to lift. The movable column 63 slides along the slide groove 66 and squeezes the adjusting spring 632. After the toggle block 81 passes the lever, the adjusting spring 632 releases its restoring force, causing all components to reset, so that the toggle assembly 8 continues to move until all electrical switches 22 are cut off, ensuring a complete power cut-off. At the same time, when the fixed rod 7 moves, it drives the protrusion 331 to slide along the guide groove 332, and the sealing plate 33 disengages from the opening of the gas storage chamber 3. The high-pressure inert gas in the chamber is released instantly, filling the entire sealing frame 4 and the metering box body 1, quickly isolating oxygen and reducing temperature to achieve precise fire extinguishing. Moreover, the inert gas leaves no residue and does not corrode, avoiding secondary damage to electrical components.

[0029] The fourth stage is post-resettlement maintenance. After emergency response, the device needs to be reset to restore normal operation. First, turn off the main power supply to the metering box, check the integrity of all components, and clean any fire debris from inside the box. Then, push the sliding assembly 6 to reset, allowing the strong magnet 68 and electromagnet 52 to re-adhere and fix themselves, simultaneously compressing the actuating spring 53 to its initial energy storage state; push the sealing plate 33 back to the opening of the gas storage chamber 3, ensuring that the protrusion 331 is re-engaged between the two fixing rods 7 to guarantee the chamber's sealing performance. Afterward, replenish the high-pressure inert gas in the gas storage chamber 3, and adjust the extension length of the adjusting block 83 to ensure that the toggle assembly 8 and the lever of the electrical switch 22 are precisely engaged. Finally, turn on the power supply 31 and check whether the temperature sensor 42, smoke sensor 43, and controller 32 are working properly. After confirming that there are no abnormalities, the device can be restored to standby mode. Subsequently, the linkage performance of each component and the gas sealing condition can be checked periodically to improve the device's service life and operational reliability.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An emergency protection mechanism for an intelligent metering box, characterized in that: Includes a partition (2), with a gas storage chamber (3) provided at the front end of the partition (2), and a power supply (31) and a controller (32) installed on the gas storage chamber (3). An electrical switch (22) is installed on the partition (2). A sealing frame (4) is provided on the partition (2) around the electrical switch (22). Two sliding rods (41) are fixed on the left and right sides of the sealing frame (4). An execution component (5) and a sliding component (6) are provided on the sliding rods (41). Two fixed rods (7) are provided between the two sliding components (6). A toggle component (8) for toggling the lever of the electrical switch (22) is installed on the fixed rods (7). A temperature sensor (42) and a smoke sensor (43) are installed on the upper inner side of the sealing frame (4), and the temperature sensor (42) and the smoke sensor (43) are electrically connected to the controller (32).

2. The emergency protection mechanism for an intelligent metering box according to claim 1, characterized in that: The execution component (5) includes a clamping block (51) held on a slide bar (41), an electromagnet (52) is provided at the upper end of the clamping block (51), and an execution spring (53) is sleeved on the slide bar (41), the execution spring (53) being located between the execution component (5) and the sliding component (6).

3. The emergency protection mechanism for an intelligent metering box according to claim 1, characterized in that: The sliding component (6) includes a slider (61) slidably connected to the slider (41). The slider (61) is provided with two left and right symmetrical fixing frames (62). The left fixing frame (62) is fixed with an installation frame (67). The installation frame (67) is provided with a strong magnet (68) for magnetic fixation with the execution component (5). The fixing frame (62) is provided with a groove (621) inside.

4. The emergency protection mechanism for an intelligent metering box according to claim 3, characterized in that: The two ends of the fixing rod (7) are respectively clamped and fixed with U-shaped fixing clamps (65). The fixing clamps (65) are provided with sliding grooves (66). The fixing clamps (65) are slidably connected with movable columns (63). The movable columns (63) are provided with fixing pins (64) to prevent them from detaching from the fixing clamps (65). The lower end of the movable columns (63) is fixed with pressure plates (631). The pressure plates (631) are symmetrically provided with adjusting springs (632). The pressure plates (631) are placed in the grooves (621) and move up and down in the grooves (621).

5. The emergency protection mechanism for an intelligent metering box according to claim 1, characterized in that: The actuating assembly (8) includes an L-shaped actuating block (81), the corner of which is sleeved and fixed to a fixing rod (7). One end of the actuating block (81) has a limiting groove (82), which is engaged with another fixing rod (7). The other end of the actuating block (81) is detachably connected to an adjusting block (83).

6. The emergency protection mechanism for an intelligent metering box according to claim 1, characterized in that: The gas storage chamber (3) has an opening at its rear end, and a sealing plate (33) is slidably connected to the opening. A protrusion (331) is fixed at the rear end of the sealing plate (33), and the protrusion (331) is engaged between two fixed rods (7). Two guide grooves (332) are respectively provided on both sides of the sealing plate (33) and are fixedly connected to the gas storage chamber (3). The protrusion (331) is slidably connected to the guide groove (332).

7. The emergency protection mechanism for an intelligent metering box according to claim 1, characterized in that: The gas storage chamber (3) is filled with high-pressure inert gas for fire extinguishing.

8. A smart metering box, using the emergency protection mechanism of a smart metering box as described in claim 1, characterized in that: The device includes a metering box body (1), and supports (21) are fixed at the four corners of the partition (2). The supports (21) are fixedly connected to the metering box body (1), and there is a gap between the partition (2) and the metering box body (1).

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