Low-voltage self-adaptive high-durability metal electric energy metering box

Abstract

The utility model relates to the technical field of electric energy metering box discloses a low pressure self -adaptation high durable metal electric energy metering box, including the shell, the inner wall opposite side fixedly connected with a plurality of mounting rods of shell, wherein a plurality of the mounting rod's outer wall even is provided with and penetrates a plurality of fixed slots, the mounting rod's outer wall is installed with a plurality of mounting seat, the mounting seat's outer wall is installed with the mounting plate, the mounting plate's outer wall is installed with power module, voltage compensation module, measurement core module and arc extinguishing protection module, the mounting seat's outer wall is provided with quick adjusting assembly, in the utility model, through voltage compensation module in the inside measurement box to dynamic regulation circuit voltage to the measurement chip rated range, guarantee the measurement accuracy, and link with arc extinguishing protection module, through the magnetic blow arc extinguishing device to drive the arc into arc grid and carry out quick arc extinguishing, improve the safety and stability of measurement box.

Description

Technical Field

[0001] This utility model relates to the field of power metering box technology, and in particular to a low-voltage adaptive high-durability metal power metering box. Background Technology

[0002] An electricity metering box is a device used to measure and meter electricity consumption. It is widely used in power supply and electricity management systems. Electricity metering boxes can provide accurate electricity metering and monitoring functions, which helps to monitor electricity usage in real time.

[0003] A search revealed an energy-saving electricity metering box in publication number CN119209252A, relating to the field of electricity metering box equipment. This energy-saving electricity metering box includes a frame explosion-proof mechanism, which comprises a box body. A door is rotatably connected to the front end of the box body via a hinge. Multiple support columns are fixedly connected to the top of the box body, and crossbars are fixedly connected to the tops of the support columns. Both ends of two crossbars are fitted with mating slots. This energy-saving electricity metering box of the present invention can continuously dissipate heat and cool the equipment, eliminating the need for desiccant replacement, thus being more energy-efficient and environmentally friendly. Furthermore, in the event of an explosion or fire, it better ensures the personal safety of personnel, solving the design problem of the metering box burning or short-circuiting due to excessive internal temperature, which affects the operating efficiency of the electricity metering box and the safety of personnel.

[0004] The aforementioned application only addresses the safety and stability improvements of the metering box in terms of its mechanical structure. However, when voltage fluctuations occur in the circuit and exceed the rated range of the internal metering chip, the circuit can still be damaged. Furthermore, when an electric arc is generated, it cannot be extinguished quickly, resulting in a safety hazard for the metering box. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a low-voltage adaptive high-durability metal energy metering box, which aims to improve the existing energy metering box. When voltage fluctuations occur in the circuit and exceed the rated range of the internal metering chip, the circuit will be damaged. When an electric arc is generated, it cannot be extinguished quickly, resulting in safety hazards in the metering box.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-voltage adaptive high-durability metal energy metering box, comprising a shell, wherein multiple mounting rods are fixedly connected to opposite sides of the inner wall of the shell, wherein multiple fixing slots are evenly opened and penetrated on the outer wall of the multiple mounting rods, multiple mounting seats are mounted on the outer wall of the mounting rods, and mounting plates are mounted on the outer wall of the mounting seats. A power module, a voltage compensation module, a metering core module, and an arc-extinguishing protection module are mounted on the outer wall of the mounting plate. The output terminal of the power module is electrically connected to the input terminal of the voltage compensation module, the voltage compensation module is bidirectionally electrically connected to the metering core module, the output terminal of the voltage compensation module is electrically connected to the input terminal of the arc-extinguishing protection module, the output terminal of the metering core module is electrically connected to the input terminal of the arc-extinguishing protection module, and a quick adjustment component is provided on the outer wall of the mounting seat.

[0007] The above technical solution utilizes a modular layout structure within the housing, achieved through the quick-adjustment components beneath the mounting base and the mounting rod. This improves installation and maintenance efficiency. A power module converts external power into DC, providing stable power for each module. A voltage compensation module dynamically adjusts the voltage to provide a stable voltage for the metering core module and works in conjunction with the arc-extinguishing protection module. The metering core module acquires signals for measurement, ensuring accuracy. Simultaneously, it works in conjunction with the arc-extinguishing protection module, using the magnetic blowout arc-extinguishing device for rapid arc extinguishing, reducing measurement accuracy errors under low voltage and ensuring accurate measurement and long-term reliable operation of the metering box in complex environments.

[0008] As a further description of the above technical solution: Preferably, the quick adjustment assembly includes multiple adjustment boxes. The outer walls of the adjustment boxes are symmetrically and fixedly connected to the bottom of the mounting base. A slider is slidably connected to the inner wall of the adjustment box. A locking rod is rotatably connected to the outer wall of the adjustment box. A lever and a locking pin are fixedly connected to the outer wall of the adjustment box. Multiple limiting rods are fixedly connected to the inner wall of the adjustment box. Springs are sleeved on the outer walls of the limiting rods. Multiple slide rails are symmetrically installed on the top of the mounting base. Multiple slide grooves are symmetrically opened on the outer wall of the mounting base. The slide rails are installed inside the slide grooves. The mounting plate is slidably connected to the top of the mounting base through the slide rails.

[0009] The above technical solution allows for multiple height adjustments by sliding multiple mounting bases on the outer wall of a mounting rod with multiple fixed slots. Support is provided by the engagement of the fixed slots with the locking pins inside the adjustment box, thereby fixing the mounting base. The mounting plate is slidably installed on the mounting base via a three-stage slide rail system to provide installation positions for electrical components, forming a modular layout and improving installation and maintenance efficiency.

[0010] As a further description of the above technical solution: Preferably, the power supply module includes an AC / DC converter, a lightning protection circuit, and an EMI filter. The input terminal of the EMI filter is electrically connected to an external power supply, the output terminal of the EMI filter is electrically connected to the input terminal of the lightning protection circuit, the output terminal of the lightning protection circuit is electrically connected to the input terminal of the AC / DC converter, and the output terminal of the AC / DC converter is electrically connected to the input terminal of the voltage compensation module.

[0011] The above technical solution involves filtering out high-frequency noise from the mains power through an EMI filter, resisting surges through a lightning protection circuit, and then outputting stable DC power through an AC / DC converter to provide clean and reliable power for subsequent modules.

[0012] As a further description of the above technical solution: Preferably, the voltage compensation module includes a high-frequency switching power supply, a voltage threshold sensor, a power MOSFET, an energy storage inductor, an output filter capacitor, a TVS diode, a threshold resistor network, and a comparator. The input terminal of the high-frequency switching power supply is electrically connected to the output terminal of the power module. The output terminal of the high-frequency switching power supply is electrically connected to the input terminal of the voltage threshold sensor. The output terminal of the voltage threshold sensor is electrically connected to the gate of the power MOSFET. The drain of the power MOSFET is electrically connected to the input terminal of the energy storage inductor. The output terminal of the energy storage inductor is electrically connected to the positive terminal of the output filter capacitor and the cathode of the TVS diode. The negative terminal of the output filter capacitor and the anode of the TVS diode are both grounded. The cathode of the TVS diode serves as the voltage output terminal and is electrically connected to the input terminal of the metering core module. The output terminal of the threshold resistor network is electrically connected to the input terminal of the comparator. The output terminal of the comparator is electrically connected to the input terminal of the arc extinguishing protection module.

[0013] The above technical solution utilizes a collaborative structure of a high-frequency switching power supply, a voltage threshold sensor, and a boost circuit. Real-time monitoring of the circuit voltage triggers the power MOSFET and energy storage inductor to boost the voltage when it falls below the threshold. A TVS diode is used to prevent high voltage from damaging components. The comparator and arc-extinguishing protection module work together to dynamically adjust the voltage to the rated range of the metering chip, ensuring metering accuracy.

[0014] As a further description of the above technical solution: Preferably, the metering core module includes a current transformer, a voltage divider network, a metering chip, and an RS transceiver. The current transformer is used to collect the main circuit current, and the voltage divider network is used to proportionally attenuate the AC input high voltage into a measurable low voltage signal. The output terminals of the current transformer and the voltage divider network are electrically connected to the input terminal of the metering chip. The output terminal of the metering chip is electrically connected to the input terminal of the RS transceiver. The output terminal of the current transformer is electrically connected to the input terminal of the arc extinguishing protection module. The output terminal of the RS transceiver is communicatively connected to the input terminal of the voltage compensation module. The metering chip is bidirectionally electrically connected to the voltage compensation module.

[0015] The above technical solution involves the use of current transformers, voltage divider networks, and metering chips to convert high current and high voltage in the main circuit into low voltage signals. The metering chip then processes these signals and transmits the data via RS485 to interact with external systems, thereby achieving high-precision metering and providing evidence of current anomalies for arc extinguishing, further ensuring the accuracy of the metering.

[0016] As a further description of the above technical solution: Preferably, the arc extinguishing protection module includes an ultraviolet light sensor, a di / dt detection circuit, a voltage comparator, an AND gate, a pulse drive chip, an electromagnetic coil, a permanent magnet, and an arc extinguishing grid. The input terminal of the di / dt detection circuit is electrically connected to the output terminal of the metering core module. The output terminals of both the di / dt detection circuit and the ultraviolet light sensor are electrically connected to the input terminal of the voltage comparator. The input terminals of the AND gate are electrically connected to the output terminals of the voltage comparator of the voltage compensation module, respectively, for three-condition collaborative determination of whether an electric arc is generated. The output terminal of the AND gate is electrically connected to the input terminal of the pulse drive chip. The output terminal of the pulse drive chip is electrically connected to the input terminal of the electromagnetic coil. The iron core of the electromagnetic coil is coaxially fixed with the permanent magnet to drive the electric arc into the arc extinguishing grid.

[0017] The above technical solution utilizes a combination of an ultraviolet light sensor, a di / dt detection circuit, and a magnetic blowout arc extinguishing system to perform dual arc detection. After confirming the risk through a logic AND gate, a magnetic field is formed by a composite structure of a driving electromagnetic coil and a permanent magnet, which pushes the arc into the arc extinguishing grid for rapid extinguishing, thus avoiding equipment damage and improving the safety of the metering box.

[0018] As a further description of the above technical solution: Preferably, the inner wall of the outer shell is provided with a protective layer and a buffer layer, the buffer layer is disposed inside the protective layer, and the inner wall of the buffer layer is filled with an elastomer.

[0019] The above technical solution uses an inner and outer double-layer structure to form a gradient composite metal box structure, and uses a honeycomb buffer layer and filled elastomer to absorb impact energy, thereby improving the overall compressive strength and lifespan of the box.

[0020] As a further description of the above technical solution: Preferably, the inner wall of the mounting base is slidably connected to the outer wall of the mounting rod, the outer wall of the adjusting box has a through-hole for actuation, the outer wall of the lever is slidably connected to the inner wall of the adjusting box, the outer wall of the locking pin is slidably connected to the inner wall of the fixing slot, the inner wall of the slider is slidably connected to the outer wall of the limiting rod, one end of the spring is fixedly connected to the inner wall of the adjusting box, the other end of the spring is fixedly connected to the outer wall of the slider, the outer wall of the slider has an annular groove, and the outer wall of the locking rod is engaged with the inner wall of the annular groove.

[0021] The above technical solution provides limiting and support for the mounting base through the mounting rod, fixes the mounting base by adjusting the engagement of the locking pin inside the box with the fixing slot on the mounting rod, and provides the quick adjustment component for reset and reusability through the spring, while also providing continuous stress support for the fixation of the mounting base.

[0022] This utility model has the following beneficial effects: 1. In this utility model, the voltage compensation module inside the metering box dynamically adjusts the circuit voltage to the rated range of the metering chip, ensuring metering accuracy. At the same time, it is linked with the arc extinguishing protection module to drive the arc into the arc extinguishing grid for rapid arc extinguishing through the magnetic blow arc extinguishing device, thereby improving the safety and stability of the metering box.

[0023] 2. In this utility model, multiple mounting seats are slidably connected to the outer wall of the mounting rod with multiple fixed slots for multiple height adjustments. The fixed slots are supported by the engagement of the locking pins in the adjustment box, thereby positioning the mounting seats. The mounting plate position is quickly adjusted by the three-stage slide rails on the mounting seats, which facilitates the disassembly, replacement and maintenance of the electronic components inside the metering box. Attached Figure Description

[0024] Figure 1 This is a perspective view of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 2 This is a schematic block diagram of the overall module of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 3 This is a separate schematic diagram of the internal structure of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 4 This utility model proposes a low-voltage adaptive high-durability metal energy metering box. Figure 3Enlarged view of point A; Figure 5 This is a separate schematic diagram of the rapid adjustment component of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model; Figure 6 This is a split view of the mounting base structure of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 7 This is a schematic block diagram of the power supply module of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 8 This is a schematic block diagram of a voltage compensation module for a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 9 A schematic block diagram of the metering core module of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model; Figure 10 This is a schematic block diagram of an arc-extinguishing protection module for a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 11 This is a schematic diagram of the internal cross-section of the outer shell of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model. Figure 12 This is an internal sectional view of the outer shell of a low-voltage adaptive high-durability metal energy metering box proposed in this utility model.

[0025] Legend: 1. Outer shell; 2. Mounting rod; 3. Mounting base; 4. Mounting plate; 5. Power module; 6. Voltage compensation module; 7. Metering core module; 8. Arc extinguishing protection module; 9. Adjustment box; 10. Slider; 11. Annular groove; 12. Locking rod; 13. Toggle rod; 14. Locking pin; 15. Limiting rod; 16. Spring; 17. Slide rail; 18. Slide groove; 19. Fixing slot; 20. Protective layer; 21. Buffer layer; 22. Elastomer. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Reference Figure 1 and Figure 2This utility model provides an embodiment of a low-voltage adaptive high-durability metal energy metering box, comprising an outer shell 1, with multiple mounting rods 2 fixedly connected to opposite sides of the inner wall of the outer shell 1, wherein multiple fixing slots 19 are evenly opened and penetrated on the outer wall of the multiple mounting rods 2, multiple mounting seats 3 are installed on the outer wall of the mounting rods 2, and mounting plates 4 are installed on the outer wall of the mounting seats 3. A power module 5, a voltage compensation module 6, a metering core module 7, and an arc extinguishing protection module 8 are installed on the outer wall of the mounting plate 4. The output end of the power module 5 is electrically connected to the input end of the voltage compensation module 6, the voltage compensation module 6 is bidirectionally electrically connected to the metering core module 7, the output end of the voltage compensation module 6 is electrically connected to the input end of the arc extinguishing protection module 8, the output end of the metering core module 7 is electrically connected to the input end of the arc extinguishing protection module 8, and a quick adjustment component is provided on the outer wall of the mounting seat 3. Specifically, the outer casing 1 provides protection and support for the entire assembly. Multiple mounting bases 3 slide onto mounting rods 2 inside the housing, and a quick-adjustment assembly allows for rapid adjustment of the distance between multiple electronic component mounting plates 4. A slide rail 17 allows for quick removal of the mounting plates 4 for the installation, replacement, and maintenance of electronic components, forming a modular installation structure. Simultaneously, a power module 5 connects to an external power source, pre-processing and outputting a stable DC power supply to a voltage compensation module 6. The voltage compensation module 6 monitors the input voltage in real time. When it detects a voltage deviation from the metering chip's rated range, it adjusts the voltage to the standard value through an internal boost circuit. The voltage status signal is transmitted to the arc extinguishing protection module 8, while the metering core module 7 simultaneously collects the current and voltage signals of the main circuit. After processing, the signals form a two-way feedback with the voltage compensation module 6, and send the abnormal current signal to the arc extinguishing protection module 8. After receiving the status signal from the voltage compensation module 6 and the abnormal signal from the metering core module 7, the arc extinguishing protection module 8 triggers the magnetic blowout arc extinguishing action through dual judgment to ensure rapid arc extinguishing. The modular layout improves installation and maintenance efficiency, the dynamic voltage compensation reduces metering accuracy errors, and the magnetic blowout arc extinguishing system shortens the arc extinguishing time, thereby improving the stability of the metering box.

[0028] Reference Figure 3 , Figure 5 and Figure 6 The quick adjustment assembly includes multiple adjustment boxes 9. The outer walls of the adjustment boxes 9 are symmetrically and fixedly connected to the bottom of the mounting base 3. The inner walls of the adjustment boxes 9 are slidably connected to sliders 10. The outer walls of the adjustment boxes 9 are rotatably connected to locking rods 12. The outer walls of the adjustment boxes 9 are fixedly connected to levers 13 and locking pins 14. The inner walls of the adjustment boxes 9 are fixedly connected to multiple limiting rods 15. The outer walls of the limiting rods 15 are fitted with springs 16. The top of the mounting base 3 is symmetrically equipped with multiple slide rails 17. The outer walls of the mounting base 3 are symmetrically provided with multiple slide grooves 18. The slide rails 17 are installed inside the slide grooves 18. The mounting plate 4 is slidably connected to the top of the mounting base 3 through the slide rails 17. Specifically, multiple mounting rods 2 are fixedly connected to the rear and left and right sides of the outer casing 1 to limit and fix the mounting base 3 in three directions, ensuring that it remains stable and does not tilt when sliding up and down. Two three-stage slide rails 17 are symmetrically arranged at the top of the mounting base 3 via a slide groove 18. A mounting plate 4 is connected to the slide rails 17. Multiple mounting holes are provided on the outer wall of the mounting plate 4 to facilitate the installation of electronic components. Multiple fixing slots 19 are evenly provided on the outer wall of the mounting rods 2 from top to bottom, allowing for multiple adjustments to the height of the mounting base 3. Adjustment boxes 9 are fixedly connected to the left and right sides of the bottom of the mounting base 3. Normally, the adjustment boxes 9 are engaged with the fixing slots 19 by the locking pins 14 inside the adjustment boxes 9. The wall provides fixation and, together with multiple mounting rods 2, supports the mounting base 3. When adjustment is needed, the levers 13 of the left and right adjustment boxes 9 need to be pulled outwards simultaneously, causing the slider 10 to slide outwards and compress the spring 16, thereby changing the position of the locking rod 12 in the annular groove 11, causing the locking pin 14 to disengage from the fixing slot 19. Then, the mounting base 3 can slide up and down. After sliding, pull the lever 13 again to allow the locking pin 14 to re-insert into another fixing slot 19. Then, the mounting plate 4 can be quickly pulled out or pushed through the three-stage slide rail 17 to complete the installation, disassembly, and maintenance of electronic components, thereby improving the efficiency of replacement and installation.

[0029] Reference Figure 7 The power module 5 includes an AC / DC converter, a surge protection circuit, and an EMI filter. The input of the EMI filter is electrically connected to an external power supply, the output of the EMI filter is electrically connected to the input of the surge protection circuit, the output of the surge protection circuit is electrically connected to the input of the AC / DC converter, and the output of the AC / DC converter is electrically connected to the input of the voltage compensation module 6. Specifically, power module 5 is directly connected to 220V AC mains power. After the noise and electromagnetic pulse in the mains power are filtered out by an EMI filter, it is input to the lightning protection circuit for protection and purification. The purified AC power is then sent to the AC / DC converter for conversion, and outputs stable DC power, thereby providing a continuous and reliable power supply for the subsequent modules and components of the entire metering box.

[0030] Reference Figure 8The voltage compensation module 6 includes a high-frequency switching power supply, a voltage threshold sensor, a power MOSFET, an energy storage inductor, an output filter capacitor, a TVS diode, a threshold resistor network, and a comparator. The input terminal of the high-frequency switching power supply is electrically connected to the output terminal of the power module 5. The output terminal of the high-frequency switching power supply is electrically connected to the input terminal of the voltage threshold sensor. The output terminal of the voltage threshold sensor is electrically connected to the gate of the power MOSFET. The drain of the power MOSFET is electrically connected to the input terminal of the energy storage inductor. The output terminal of the energy storage inductor is electrically connected to the positive terminal of the output filter capacitor and the cathode of the TVS diode. The negative terminal of the output filter capacitor and the anode of the TVS diode are both grounded. The cathode of the TVS diode serves as the voltage output terminal and is electrically connected to the input terminal of the metering core module 7. The output terminal of the threshold resistor network is electrically connected to the input terminal of the comparator. The output terminal of the comparator is electrically connected to the input terminal of the arc extinguishing protection module 8. Specifically, the high-frequency switching power supply receives the voltage output from power module 5. A voltage threshold sensor monitors this voltage in real time to determine whether it is within the rated voltage range required by the metering chip. When the voltage is lower than the threshold, the voltage threshold sensor triggers the power MOSFET to turn on. At this time, the energy storage inductor begins to store energy. When the power MOSFET turns off, the energy storage inductor releases energy, working with the output filter capacitor to raise the voltage to the rated range, thereby ensuring that the metering chip always operates in a stable voltage environment. The TVS diode is connected in parallel at the output terminal. When a momentary high voltage occurs, it will quickly turn on to clamp the voltage to a safe value, thereby protecting the metering chip from damage. At the same time, the threshold resistor network divides the voltage signal and transmits it to the comparator. The comparator compares it with the preset threshold. When an abnormal voltage is detected, it outputs a signal to the subsequent arc extinguishing protection module 8 to trigger the protection mechanism.

[0031] Reference Figure 9 The metering core module 7 includes a current transformer, a voltage divider network, a metering chip, and an RS485 transceiver. The current transformer is used to collect the main circuit current, and the voltage divider network is used to proportionally attenuate the AC input high voltage into a measurable low voltage signal. The output terminals of the current transformer and the voltage divider network are electrically connected to the input terminal of the metering chip. The output terminal of the metering chip is electrically connected to the input terminal of the RS485 transceiver. The output terminal of the current transformer is electrically connected to the input terminal of the arc extinguishing protection module 8. The output terminal of the RS485 transceiver is communicatively connected to the input terminal of the voltage compensation module 6. The metering chip is bidirectionally electrically connected to the voltage compensation module 6. Specifically, the current transformer is connected in series with the main circuit, proportionally converting the large current in the main circuit into a small current signal. The voltage divider network proportionally attenuates the high voltage of the main circuit into a low voltage signal. Both signals are transmitted to the metering chip simultaneously. The metering chip processes the received current and voltage signals to calculate the relevant electrical energy parameters. The processed metering data is converted into a standard communication signal via an RS485 transceiver, enabling interaction with external devices. At the same time, the current signal output by the current transformer is also transmitted to the arc extinguishing protection module 8, providing current basis for arc detection. The metering chip maintains bidirectional communication with the voltage compensation module 6, receiving the compensated stable voltage to ensure its own working accuracy, while also feeding back the error caused by voltage changes during the metering process to the voltage compensation module 6 so that it can further optimize voltage regulation, thereby improving metering accuracy.

[0032] Reference Figure 10 The arc extinguishing protection module 8 includes an ultraviolet light sensor, a di / dt detection circuit, a voltage comparator, a logic AND gate, a pulse drive chip, an electromagnetic coil, a permanent magnet, and an arc extinguishing grid. The input terminal of the di / dt detection circuit is electrically connected to the output terminal of the metering core module 7. The output terminals of the di / dt detection circuit and the ultraviolet light sensor are both electrically connected to the input terminal of the voltage comparator. The input terminal of the logic AND gate is electrically connected to the output terminals of the voltage compensation module 6 and the voltage comparator, respectively, for three conditions to jointly determine whether an electric arc is generated. The output terminal of the logic AND gate is electrically connected to the input terminal of the pulse drive chip. The output terminal of the pulse drive chip is electrically connected to the input terminal of the electromagnetic coil. The iron core of the electromagnetic coil is coaxially fixed with the permanent magnet to drive the electric arc into the arc extinguishing grid. Specifically, when an electric arc occurs in the main circuit, the ultraviolet light sensor detects the ultraviolet radiation generated by the arc and outputs a corresponding signal. At the same time, the di / dt detection circuit also detects the sudden change in current and outputs a corresponding signal. These two signals are input to the voltage comparator, compared with a preset threshold, converted into logic signals, and passed to the subsequent AND gate. After receiving the signal, the AND gate combines it with the voltage abnormality signal from the voltage compensation module 6. Only when all signals indicate the presence of an electric arc risk will the AND gate output a trigger signal to the pulse drive chip. At this time, the pulse drive chip drives the electromagnetic coil to generate a magnetic field, which interacts with the magnetic field formed by the permanent magnet, generating a directional force that pushes the arc towards the arc extinguishing grid. After entering the arc extinguishing grid, the arc is divided into multiple short arcs, thus extinguishing it quickly.

[0033] Reference Figure 11 and Figure 12 The inner wall of the outer shell 1 is provided with a protective layer 20 and a buffer layer 21. The buffer layer 21 is disposed inside the protective layer 20, and the inner wall of the buffer layer 21 is filled with an elastomer 22. Specifically, the outer shell 1 adopts a gradient composite metal structure, with the protective layer 20 as the outer layer and a zinc-nickel alloy plating, and the buffer layer 21 as the inner layer. The whole structure is a honeycomb aluminum alloy skeleton, and the gaps are filled with elastomer 22. The elastomer 22 is made of polyurethane, which provides buffering to absorb impact energy when an impact occurs, improves the overall compressive strength of the box, and enhances its corrosion resistance life.

[0034] Reference Figure 3 , Figure 4 and Figure 5 The inner wall of the mounting base 3 is slidably connected to the outer wall of the mounting rod 2. The outer wall of the adjustment box 9 has a through-hole. The outer wall of the lever 13 is slidably connected to the inner wall of the adjustment box 9. The outer wall of the locking pin 14 is slidably connected to the inner wall of the fixing slot 19. The inner wall of the slider 10 is slidably connected to the outer wall of the limiting rod 15. One end of the spring 16 is fixedly connected to the inner wall of the adjustment box 9. The other end of the spring 16 is fixedly connected to the outer wall of the slider 10. The outer wall of the slider 10 has an annular groove 11. The outer wall of the locking rod 12 is engaged with the inner wall of the annular groove 11. Specifically, the sides of the mounting base 3 are slidably connected to and fitted against the inner wall of the outer casing 1 to ensure its stability during sliding. The locking pin 14 engages with the inner wall of the fixing slot 19, providing upward support for the mounting base 3, and together with the outer casing 1 and multiple mounting rods 2, ensuring the stability of the mounting base 3. The locking rod 12 is slidably connected to and engaged with the inner wall of the annular groove 11. When the locking pin 14 is engaged in the fixing slot 19, the locking rod 12 is located at the tip of the heart-shaped sliding groove of the annular groove 11. When it is necessary to release the engagement between the locking pin 14 and the fixing slot 19, the lever 13 is pulled to drive the slider 10 and the locking pin 14 to slide downward along the limit rod 15, compressing the spring 16, so that the locking rod 12 slides along the annular groove 11. The slider 12 slides along the inner wall of the annular groove 11 until it reaches the top of the heart shape and engages. At this point, the distance between the locking pin 14 and the fixed slot 19 increases, and it disengages from the fixed slot 19. The mounting base 3 can then be slid freely to change its height. After the change is completed, the lever 13 is turned again, causing the locking rod 12 to slide along the inner wall of the annular groove 11 again, from the top of the heart shape back to the tip of the heart shape. This causes the locking pin 14 to re-enter the fixed slot 19, providing upward support and height locking for the mounting base 3. The limiting rod 15 ensures the stability of the slider 10's sliding, and the spring 16 ensures the repeatability of the operation through stress and can provide a certain locking force to the slider 10 to prevent it from sliding without reason.

[0035] Working Principle: During the operation of this metering box, when an external power source is connected, the power supply module 5 receives and processes the external power before supplying power to the subsequent voltage compensation module 6. The high-frequency switching power supply in the voltage compensation module 6 monitors the input voltage in real time and uses a voltage threshold sensor to determine whether the voltage is within the rated range of the metering chip. If it is below the threshold, it triggers the boost circuit composed of a power MOSFET and an energy storage inductor to adjust the voltage to the rated operating range of the metering chip. The TVS diode then continues to transfer power to the subsequent metering core module 7. Simultaneously, the threshold resistor network in the voltage compensation module 6 divides the voltage signal and transmits it to the subsequent arc extinguishing circuit through a comparator. The protection module 8 and the metering core module 7 continuously monitor the current and voltage of the circuit through a current transformer and a voltage divider network, and transmit the data signal to the metering chip for calculation. After processing, the metering chip transmits the data through an RS485 transceiver and transmits the current signal to the arc extinguishing protection module 8. When an arc is generated, the arc extinguishing protection module 8 detects the arc's ultraviolet radiation through an ultraviolet light sensor and monitors the current change through a di / dt detection circuit, thereby triggering the pulse drive chip to control the electromagnetic coil and permanent magnet to form a directional magnetic field, driving the arc into the ceramic arc extinguishing grid to extinguish it quickly, thereby improving the metering accuracy and reliability of the metering box in complex outdoor environments. If it is necessary to adjust the distance between the various mounting seats 3 and mounting plates 4 inside the outer casing 1 to facilitate the installation, disassembly, and maintenance of internal components, pull the two levers 13 installed on both sides of the bottom of the mounting seat 3 outwards by hand. This will cause the slider 10 to slide outwards synchronously, compressing the spring 16. At the same time, the lever 12, which was originally engaged at the bottom of the annular groove 11, will slide along the inner wall of the annular groove 11 until it engages at the top of the annular groove 11. At this point, the slider 10 will be temporarily fixed due to the engagement between the annular groove 11 and the lever 12, causing the locking pin 14 to slide outwards. This will cause the locking pin 14 to disengage from the fixing slot 19, allowing the mounting seat 3 to be moved freely along the direction of the mounting rod 2. When the mounting base 3 is moved to the appropriate height, pull the levers 13 on both sides outwards by hand again. This causes the slider 10 to slide and compress the spring 16 again. This causes the lever 12, which was originally engaged at the uppermost end of the annular groove 11, to slide along the inner wall of the annular groove 11 until it engages at the bottommost end of the annular groove 11. This causes the locking pin 14 to slide inwards, allowing it to re-enter the nearby fixed slot 19 and engage. This, in conjunction with the multiple mounting rods 2, provides stable support for the mounting base 3, thereby enabling free adjustment of the height of the mounting base 3. Afterwards, the mounting plate 4 can be quickly pulled out via the slide rail 17 to install, disassemble, or replace the electronic components on it, improving installation and maintenance efficiency.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-voltage adaptive high-durability metal energy metering box, comprising a shell (1), characterized in that: Multiple mounting rods (2) are fixedly connected to the inner wall of the outer shell (1) on opposite sides. Multiple mounting rods (2) have multiple fixed slots (19) evenly opened and penetrated on their outer walls. Multiple mounting seats (3) are installed on the outer walls of the mounting rods (2). Mounting plates (4) are installed on the outer walls of the mounting seats (3). Power modules (5), voltage compensation modules (6), metering core modules (7) and arc extinguishing protection modules (8) are installed on the outer walls of the mounting plates (4). The output end of the power module (5) is electrically connected to the input end of the voltage compensation module (6). The voltage compensation module (6) is bidirectionally electrically connected to the metering core module (7). The output end of the voltage compensation module (6) is electrically connected to the input end of the arc extinguishing protection module (8). The output end of the metering core module (7) is electrically connected to the input end of the arc extinguishing protection module (8). A quick adjustment component is provided on the outer wall of the mounting seat (3).

2. The low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The quick adjustment assembly includes multiple adjustment boxes (9), the outer walls of the adjustment boxes (9) are symmetrically fixedly connected to the bottom of the mounting base (3), the inner walls of the adjustment boxes (9) are slidably connected to sliders (10), the outer walls of the adjustment boxes (9) are rotatably connected to locking rods (12), the outer walls of the adjustment boxes (9) are fixedly connected to levers (13) and locking pins (14), the inner walls of the adjustment boxes (9) are fixedly connected to multiple limiting rods (15), the outer walls of the limiting rods (15) are fitted with springs (16), the top of the mounting base (3) is symmetrically installed with multiple slide rails (17), the outer walls of the mounting base (3) are symmetrically opened with multiple sliding grooves (18), the slide rails (17) are installed inside the sliding grooves (18), and the mounting plate (4) is slidably connected to the top of the mounting base (3) through the slide rails (17).

3. The low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The power module (5) includes an AC / DC converter, a lightning protection circuit, and an EMI filter. The input terminal of the EMI filter is electrically connected to an external power supply. The output terminal of the EMI filter is electrically connected to the input terminal of the lightning protection circuit. The output terminal of the lightning protection circuit is electrically connected to the input terminal of the AC / DC converter. The output terminal of the AC / DC converter is electrically connected to the input terminal of the voltage compensation module (6).

4. The low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The voltage compensation module (6) includes a high-frequency switching power supply, a voltage threshold sensor, a power MOSFET, an energy storage inductor, an output filter capacitor, a TVS diode, a threshold resistor network, and a comparator. The input terminal of the high-frequency switching power supply is electrically connected to the output terminal of the power supply module (5). The output terminal of the high-frequency switching power supply is electrically connected to the input terminal of the voltage threshold sensor. The output terminal of the voltage threshold sensor is electrically connected to the gate of the power MOSFET. The drain of the power MOSFET is electrically connected to the input terminal of the energy storage inductor. The output terminal of the energy storage inductor is electrically connected to the positive terminal of the output filter capacitor and the cathode of the TVS diode. The negative terminal of the output filter capacitor and the anode of the TVS diode are both grounded. The cathode of the TVS diode is electrically connected to the input terminal of the metering core module (7) as the voltage output terminal. The output terminal of the threshold resistor network is electrically connected to the input terminal of the comparator. The output terminal of the comparator is electrically connected to the input terminal of the arc extinguishing protection module (8).

5. A low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The metering core module (7) includes a current transformer, a voltage divider network, a metering chip, and an RS485 transceiver. The current transformer is used to collect the main circuit current. The voltage divider network is used to proportionally attenuate the AC input high voltage into a measurable low voltage signal. The output terminals of the current transformer and the voltage divider network are electrically connected to the input terminal of the metering chip. The output terminal of the metering chip is electrically connected to the input terminal of the RS485 transceiver. The output terminal of the current transformer is electrically connected to the input terminal of the arc extinguishing protection module (8). The output terminal of the RS485 transceiver is communicatively connected to the input terminal of the voltage compensation module (6). The metering chip is bidirectionally electrically connected to the voltage compensation module (6).

6. A low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The arc extinguishing protection module (8) includes an ultraviolet light sensor, a di / dt detection circuit, a voltage comparator, a logic AND gate, a pulse drive chip, an electromagnetic coil, a permanent magnet, and an arc extinguishing grid. The input terminal of the di / dt detection circuit is electrically connected to the output terminal of the metering core module (7). The output terminals of the di / dt detection circuit and the ultraviolet light sensor are both electrically connected to the input terminal of the voltage comparator. The input terminal of the logic AND gate is electrically connected to the output terminals of the voltage compensation module (6) and the voltage comparator, respectively, for three conditions to jointly determine whether an electric arc is generated. The output terminal of the logic AND gate is electrically connected to the input terminal of the pulse drive chip. The output terminal of the pulse drive chip is electrically connected to the input terminal of the electromagnetic coil. The iron core of the electromagnetic coil is coaxially fixed with the permanent magnet to drive the electric arc into the arc extinguishing grid.

7. A low-voltage adaptive high-durability metal energy metering box according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a protective layer (20) and a buffer layer (21). The buffer layer (21) is disposed inside the protective layer (20), and the inner wall of the buffer layer (21) is filled with an elastomer (22).

8. A low-voltage adaptive high-durability metal energy metering box according to claim 2, characterized in that: The inner wall of the mounting base (3) is slidably connected to the outer wall of the mounting rod (2). The outer wall of the adjustment box (9) has a sliding groove. The outer wall of the lever (13) is slidably connected to the inner wall of the adjustment box (9). The outer wall of the latch (14) is slidably connected to the inner wall of the fixing slot (19). The inner wall of the slider (10) is slidably connected to the outer wall of the limiting rod (15). One end of the spring (16) is fixedly connected to the inner wall of the adjustment box (9). The other end of the spring (16) is fixedly connected to the outer wall of the slider (10). The outer wall of the slider (10) has an annular groove (11). The outer wall of the latch (12) is engaged with the inner wall of the annular groove (11).

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