A box structure of an electric energy metering box

Abstract

This invention discloses a box structure for an electricity metering box, including a main body, a top cover, a door, an internal support module, a layered heat dissipation assembly, and a sealing and protective assembly. The main body is a one-piece molded three-layer composite shell, consisting of an outer protective layer, a middle buffer layer, and an inner flame-retardant layer. The top cover is connected to the top of the main body, and the bottom of the main body has an inlet hole and an outlet channel. The door is hinged to the main body via a damping hinge, and a sealing strip is installed on the surface of the main body where it contacts the door. The outer side of the door has a transparent observation window and an anti-theft lock. The internal support module is assembled into the inner cavity of the main body. The layered heat dissipation assembly is embedded in both sides of the main body and the top cover, with a staggered airflow ventilation structure between them. This invention effectively solves the problems in the prior art through the above structural design.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, specifically to a box structure for an electricity metering box. Background Technology

[0002] The electricity metering box is a critical protective device in the power metering system, carrying core components such as electricity meters, circuit breakers, and terminals. It directly determines the operational stability, service life, and electrical safety of the metering equipment. Currently, most conventional electricity metering boxes on the market employ a single material splicing structure and a simple enclosed or crude ventilation design. These designs have numerous technical defects in actual operation and long-term use, and are no longer suitable for the stringent requirements of smart grid upgrades and complex operating conditions.

[0003] Firstly, there is a significant conflict between heat dissipation and protection. To meet IP protection standards, traditional enclosures often employ a fully enclosed design or a few fixed ventilation holes. In high-temperature summer environments, the internal temperature of the enclosure can easily soar to over 60°C due to heat generated by the equipment and direct sunlight, far exceeding the optimal operating temperature threshold of 40°C for electricity meters. This can lead to minor issues such as inaccurate metering and power consumption, or even burn out electronic components and cause power supply failures. On the other hand, blindly expanding the ventilation openings can significantly reduce waterproof, dustproof, and salt spray resistance. In damp and rainy outdoor environments, rainwater, moisture, and dust can easily penetrate the enclosure, causing safety hazards such as corrosion of wiring terminals and short circuits.

[0004] Secondly, condensation problems are frequent, and the structure has poor sealing. Conventional enclosures have many gaps in their splicing and rudimentary sealing technology. When there are sudden changes in temperature or humidity between day and night, condensation easily forms inside the enclosure. The accumulated condensation will corrode the internal components and damage the insulation performance. According to power grid operation and maintenance data, more than 20% of metering box failures are caused by condensation problems due to sealing failure. In addition, traditional enclosures are mostly made of ordinary plastic or thin metal materials, which have poor impact resistance and weather resistance. Long-term outdoor use is prone to aging, cracking, rusting and deformation, and continuous degradation of protective performance.

[0005] Third, the operation and maintenance are not convenient enough, and the structural versatility is weak. Most existing enclosures are integrated fixed structures with rigid internal space layouts. The installation, maintenance, and replacement of equipment such as electricity meters and circuit breakers require the complete disassembly of the enclosure, which is cumbersome, time-consuming, and labor-intensive. Moreover, the compatibility of different specifications of metering equipment is poor, and modular assembly cannot be achieved. At the same time, the enclosures lack anti-theft and anti-accidental opening protection designs, which can be easily opened by unauthorized personnel, posing security risks of electricity theft and wiring tampering. Summary of the Invention

[0006] The purpose of this invention is to provide a box structure for an electricity metering box to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a box structure for an electricity metering box, comprising a box body, a top cover, a box door, an internal load-bearing module, a layered heat dissipation and cooling assembly, and a sealing and protective assembly. The box body is a one-piece molded three-layer composite shell, consisting of an outer protective layer, a middle buffer layer, and an inner flame-retardant layer. The top cover is connected to the top of the box body, and an inlet hole and an outlet channel are provided at the bottom of the box body. The box door is hinged to the box body via a damping hinge. A sealing strip is installed on the surface of the box body at the point where it contacts the box door. A transparent observation window is provided on the outer side of the box door. Anti-theft lock; the internal load-bearing module is assembled in the inner cavity of the main body of the enclosure; the layered airflow and heat dissipation components are embedded in the sides and top cover of the main body of the enclosure, with a staggered airflow and ventilation structure between them; the sealing and protection components cover the splicing gaps, inlet holes and outlet channels of the main body of the enclosure; the outer protective layer is made of glass fiber reinforced ASA engineering plastic with a thickness of 3-5mm, the middle buffer layer is made of rigid polyurethane foam with a thickness of 2-3mm, the inner flame retardant layer is made of flame retardant alloy material with a thickness of 1.5-2mm and a flame retardant rating of V0; the main body of the enclosure is integrally molded.

[0008] Preferably, the layered heat dissipation assembly includes a side heat dissipation cavity, a top cover heat dissipation cavity, staggered ventilation louvers, and a waterproof baffle. The side heat dissipation cavities are symmetrically arranged on both sides of the main body of the enclosure, and an inner filter screen is provided on their inner side. The staggered ventilation louvers with an inclination angle of 30°-45° are installed on the outer side of the main body of the enclosure at a position opposite to the side heat dissipation cavities. The top cover heat dissipation cavity is a transverse arc-shaped cavity. The two ends of the outer wall of the main body of the enclosure are connected to the side heat dissipation cavities. The front and rear ends of the bottom of the top cover are also provided with exhaust micro-holes, and the exhaust micro-holes are connected to the top cover heat dissipation cavity. The top cover heat dissipation cavity and the side heat dissipation cavity cooperate to form a convection heat dissipation channel. The waterproof baffle is attached to the edge of the side heat dissipation cavity and a 0.5mm ventilation gap is reserved between it and the staggered ventilation louvers.

[0009] Preferably, the sealing and protection assembly includes a detachable elastic sealing plug and a sealing strip. The elastic sealing plug is assembled into the inlet hole and the outlet channel, and the sealing strip is embedded in the joint gap of the housing.

[0010] Preferably, the sealing strip adopts a double-layer hollow structure design and is made of EPDM rubber.

[0011] Preferably, the internal support module includes an energy meter mounting rail, a circuit breaker fixing slot, and a terminal block mounting position. The energy meter mounting rail and the inner cavity of the main body of the box adopt a detachable standardized structure. The surface of the energy meter mounting rail is provided with a circuit breaker fixing slot and a terminal block mounting position. Beneficial effects

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: 1. This invention effectively solves the core problem of traditional enclosures' difficulty in simultaneously achieving both heat dissipation and protection through the synergistic design of a layered heat dissipation component and a composite shell structure. The layered heat dissipation component adopts a staggered airflow structure consisting of a side heat dissipation cavity, a top cover heat dissipation cavity, and staggered ventilation louvers. The side staggered ventilation louvers are set at an inclination angle of 30°-45°, combined with an inner waterproof baffle and a 0.5mm reserved ventilation gap. This achieves efficient convection heat dissipation between the inside of the enclosure and the outside environment. The combination of the top cover heat dissipation cavity and the side heat dissipation cavity forms a complete convection heat dissipation channel, quickly dissipating the heat generated by the equipment operation and stabilizing the internal temperature of the enclosure within the optimal operating temperature threshold (40°C) of the electricity meter, avoiding problems such as metering accuracy deviation, inaccurate electricity metering, and burnout of electronic components caused by high temperatures. At the same time, the double protection of the staggered structure and the waterproof baffle effectively blocks the intrusion of rainwater, moisture, dust, and salt spray, balancing heat dissipation efficiency and IP protection performance, and completely solving the technical problems of traditional enclosures that overheat when closed and lack protection when ventilated.

[0013] 2. This invention, through its multi-layered sealing protection design and the selection of high-quality materials, completely solves the problems of traditional enclosures, such as inadequate sealing, frequent condensation, and easy aging of the structure. The main body of the enclosure adopts an integrated molding process, significantly reducing splicing gaps. The detachable elastic sealing plugs of the sealing protection components are fitted into the inlet and outlet channels and sealing strips, achieving full-point sealing coverage. The door seal strip on the inner side of the enclosure door is made of EPDM rubber with a double-layer hollow structure design. This material has excellent weather resistance, ozone resistance, and elasticity, and can be used for a long time in environments ranging from -50℃ to 150℃. The double-layer hollow structure further enhances the sealing performance, effectively preventing moisture intrusion and eliminating condensation from the source when there are sudden changes in temperature or humidity between day and night. This reduces the risk of faults such as terminal corrosion and short circuits caused by condensation, solving the problem that over 20% of metering box failures in existing technologies originate from sealing failure. Meanwhile, in the three-layer composite structure of the main body of the enclosure, the outer 3-5mm thick glass fiber reinforced ASA engineering plastic has high rigidity, weather resistance and anti-aging properties. Its tensile strength and creep resistance are excellent, and it can withstand outdoor sun and rain for a long time without aging and cracking. The middle 2-3mm thick rigid polyurethane foam layer plays a good role in buffering and heat insulation. The inner 1.5-2mm thick V0-grade flame-retardant alloy material can quickly self-extinguish after the fire source is removed and does not release dripping combustibles, which greatly improves the fire safety of the enclosure. The three layers work together to significantly enhance the impact resistance, weather resistance and flame retardancy of the enclosure and extend the overall service life of the enclosure.

[0014] 3. This invention effectively solves the problems of cumbersome maintenance, weak versatility, and insufficient anti-theft performance of traditional enclosures through modular and standardized structural design. The internal load-bearing module adopts a detachable standardized structure, including a meter mounting rail, a circuit breaker fixing slot, and a terminal block bracket. The rail surface has reserved dedicated mounting positions, which can flexibly adapt to different specifications of meters, circuit breakers, and terminals, realizing modular assembly. The installation, maintenance, and replacement of equipment can be completed without disassembling the entire enclosure, greatly simplifying the operation process, reducing the workload of maintenance personnel, and improving maintenance efficiency. At the same time, the enclosure door is equipped with an anti-theft lock and anti-theft limit component, which can effectively prevent unauthorized personnel from opening the enclosure, avoiding security risks such as electricity theft and wiring tampering, and ensuring the fairness and security of electricity metering. The transparent observation window on the outside of the enclosure door allows for real-time viewing of the operating status of the equipment inside the enclosure, and daily inspections can be completed without opening the enclosure door, further improving the convenience of maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the box body of the present invention; Figure 3 This is a schematic cross-sectional view of the main body of the box according to the present invention; Figure 4 This is a schematic diagram of the structure of the side heat dissipation cavity combined with the staggered ventilation louvers and waterproof baffle of the present invention.

[0016] Figure 5 This is a schematic diagram of the cross-sectional structure of the door sealing strip of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the top cover of the present invention.

[0017] The correspondence between the labels and component names in the attached figures is as follows: 1. Main body of the enclosure; 2. Top cover; 3. Door; 4. Internal load-bearing module; 5. Layered heat dissipation assembly; 6. Sealed protective components; 11. Cable inlet; 12. Cable outlet; 13. Outer protective layer; 14. Intermediate buffer layer; 15. Inner flame-retardant layer; 16. Sealing strip; 21. Exhaust micropores; 31. Transparent observation window; 32. Anti-theft lock; 41. Electricity meter mounting rail; 42. Circuit breaker fixing slot; 43. Terminal block mounting position; 51. Side heat dissipation cavity; 52. Top cover airflow cavity; 53. Offset ventilation louvers; 54. Waterproof baffle; 55. Filter screen; 56. Ventilation gap; 61. Sealing strip; 62. Elastic sealing plug. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "vertical," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] like Figure 1-6 This is a schematic diagram of the structure of an electricity metering box according to a preferred embodiment of the present invention. In this embodiment, the structure of the electricity metering box includes a box body 1, a top cover 2, a box door 3, an internal support module 4, a layered heat dissipation and heat diversion assembly 5, and a sealing and protection assembly 6.

[0021] The main body 1 of the enclosure is manufactured using an integrated molding process, specifically a three-layer composite shell structure. From the outside to the inside, it consists of an outer protective layer 13, a middle buffer layer 14, and an inner flame-retardant layer 15. The outer protective layer 13 is made of glass fiber reinforced ASA engineering plastic with a thickness of 3-5mm, providing high rigidity, weather resistance, and anti-aging properties. The middle buffer layer 14 is a rigid polyurethane foam layer with a thickness of 2-3mm, serving as a buffer and heat insulation layer. The inner flame-retardant layer 15 is made of a flame-retardant alloy material with a thickness of 1.5-2mm and a flame-retardant rating of V0, designed for rapid self-extinguishing after the fire source is removed, enhancing fire safety. The three layers are tightly bonded together through a molding process to form an integrated, high-strength, multi-functional shell.

[0022] The top of the enclosure body 1 is fixedly connected to a top cover 2, and the bottom has an inlet hole 11 and an outlet channel 12 for cables. The enclosure door 3 is hinged to the enclosure body 1 via a damping hinge, enabling smooth opening and closing of the door 3. A sealing strip 16 is installed on the front face of the enclosure body 1 at the contact point with the door 3. The outer side of the door 3 is provided with a transparent observation window 31 and an anti-theft lock 32. The transparent observation window 31 allows maintenance personnel to view the status of the internal equipment in real time without opening the door 3, while the anti-theft lock 32 is used to prevent unauthorized personnel from opening the door.

[0023] The internal support module 4 is assembled into the inner cavity of the main body 1 and is used to install core metering equipment such as electricity meters, circuit breakers, and wiring terminals. Specifically, for example... Figure 1 As shown, the internal support module 4 includes an energy meter mounting rail 41, a circuit breaker fixing slot 42, and a terminal block mounting position 43. The energy meter mounting rail 41 is connected to the inner cavity of the main body 1 using a detachable standardized structure, allowing for quick installation or disassembly according to actual needs. The surface of the energy meter mounting rail 41 has multiple pre-drilled mounting holes, forming the circuit breaker fixing slot 42 for fixing the circuit breaker and the terminal block mounting position 43 for installing the terminal blocks, thus achieving modular assembly of equipment of different specifications.

[0024] In this embodiment, the layered airflow cooling assembly 5 is embedded in both sides of the main body 1 and the top cover 2, with a staggered airflow ventilation structure between them. Specifically, the layered airflow cooling assembly 5 includes a side heat dissipation cavity 51, a top cover airflow cavity 52, staggered ventilation louvers 53, and a waterproof baffle 54. The side heat dissipation cavity 51 is symmetrically arranged in the two side walls of the main body 1, and an inner filter screen 55 is provided on its inner side (i.e., the side facing the inside of the box) to prevent dust, insects, and other foreign objects from entering the box. The outer side of the main body 1 is located opposite to the side heat dissipation cavity 51 and is equipped with staggered ventilation louvers 53 with an inclination angle of 30°-45°. The top cover airflow cavity 52 is a transverse arc-shaped cavity, and its two ends are connected to the side heat dissipation cavities 51 on both sides of the outer wall of the main body 1. The bottom front end and rear end of the top cover 2 are also provided with multiple exhaust micro-holes 21, and these exhaust micro-holes 21 are connected to the top cover airflow cavity 52. Through this design, the side heat dissipation cavity 51, the top cover airflow cavity 52, and the exhaust micro-holes 21 work together to form a complete convection heat dissipation channel. The waterproof baffle 54 is attached to the edge of the side heat dissipation cavity 51, and a 0.5mm ventilation gap 56 is reserved between it and the staggered ventilation louvers 53. During operation, external cold air enters from the staggered ventilation louvers 53 on one side, passes through the side heat dissipation cavity 51 and the top cover airflow cavity 52, and finally exits from the staggered ventilation louvers 53 on the other side or the exhaust micro-holes 21, carrying away the heat inside the enclosure in the process. The 30°-45° inclined louvers and the 0.5mm micro-ventilation gaps 56, combined with the waterproof baffle 54, ensure air circulation while effectively preventing rainwater and splashing water from directly entering from the outside, achieving a synergy of efficient heat dissipation and high-level protection.

[0025] In this embodiment, a sealing and protective component 6 is provided, and the sealing strip 16 is optimized. The sealing and protective component 6 includes a detachable elastic sealing plug 62 and a sealing strip 61. The elastic sealing plug 62 is detachably assembled at the inlet hole 11 and the outlet channel 12, and is matched according to the specifications of the actual inlet and outlet cables to achieve effective sealing at the cable inlet. The sealing strip 61 is embedded in the joint between the main body 1 and the top cover 2 to further seal any possible small gaps. Figure 5 As shown, the sealing strip 16 adopts a double-layer hollow structure design and is made of EPDM rubber. This material has excellent weather resistance, ozone resistance, and elasticity, and can maintain good sealing performance over a wide temperature range. The double-layer hollow structure is compressed when the door 3 is closed, forming two sealing barriers, effectively preventing external moisture and dust from entering along the door seams, thus eliminating condensation at the source.

[0026] Working principle First, the three-layer composite structure of the enclosure body 1 is manufactured using an integrated molding process. Then, the sealing strip 61 is embedded at the joint between the enclosure body 1 and the top cover 2, and the top cover 2 is installed. The components of the layered heat dissipation assembly 5, such as the side heat dissipation cavity 51 and the staggered ventilation louvers 53, are assembled into place. The energy meter mounting rail 41, which carries the internal load-bearing module 4, is installed inside the enclosure body 1. According to actual needs, the energy meter, circuit breaker, and wiring terminals are respectively installed on the energy meter mounting rail 41, the circuit breaker fixing slot 42, and the wiring terminal mounting position 43. The inlet and outlet cables are passed through the elastic sealing plug 62, and the inlet hole 11 and outlet channel 12 are sealed using the elastic sealing plug 62. Finally, the enclosure door 3, equipped with a sealing strip 16, is hinged to the enclosure body 1 using a damping hinge, and the anti-theft lock 32 is locked, completing the overall assembly.

[0027] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A box structure for an electricity metering box, characterized in that: The enclosure includes a main body (1), a top cover (2), a door (3), an internal support module (4), a layered heat dissipation assembly (5), and a sealing and protection assembly (6). The main body (1) is a three-layer composite shell formed by one-piece molding, consisting of an outer protective layer (13), a middle buffer layer (14), and an inner flame-retardant layer (15). The top cover (2) is connected to the top of the main body (1), and the bottom of the main body (1) has an inlet hole (11) and an outlet channel (12). The door (3) is hinged to the main body (1) via a damping hinge. A sealing strip (16) is installed on the surface of the main body (1) at the point where it fits against the door (3). The outside of the door (3) is provided with a transparent observation window (31) and an anti-theft lock. The internal bearing module (4) is assembled in the inner cavity of the main body (1); the layered heat dissipation component (5) is embedded in the sides and top cover (2) of the main body (1), and the staggered heat dissipation structure is adopted between them; the sealing protection component (6) covers the splicing gap of the main body (1) and the cable outlet channel (12) of the inlet hole (11); the outer protective layer (13) is glass fiber reinforced ASA engineering plastic with a thickness of 3-5mm, the middle buffer layer (14) is rigid polyurethane foam with a thickness of 2-3mm, the inner flame retardant layer (15) is flame retardant alloy material with a thickness of 1.5-2mm and a flame retardant rating of V0; the main body (1) of the box is integrally molded.

2. The box structure of an electricity metering box according to claim 1, characterized in that: The layered heat dissipation assembly (5) includes a side heat dissipation cavity (51), a top cover heat dissipation cavity (52), staggered ventilation louvers (53), and a waterproof baffle (54); the side heat dissipation cavity (51) is symmetrically arranged on both sides of the main body (1), and an inner filter screen (55) is provided on its inner side; staggered ventilation louvers (53) with an inclination angle of 30°-45° are installed on the outer side of the main body (1) at a position opposite to the side heat dissipation cavity (51); the top cover heat dissipation cavity (52) is a transverse arc-shaped cavity. The outer walls of the main body (1) are connected to the side heat dissipation cavity (51) at both ends. The bottom front and rear ends of the top cover (2) are also provided with exhaust micro holes (21), and the exhaust micro holes (21) are connected to the top cover guide cavity (52). The top cover guide cavity (52) and the side heat dissipation cavity (51) are combined to form a convection heat dissipation channel. The waterproof baffle (54) is attached to the edge of the side heat dissipation cavity (51) and a 0.5mm ventilation gap (56) is reserved between it and the staggered ventilation louver (53).

3. The box structure of an electricity metering box according to claim 1, characterized in that: The sealing and protection component (6) includes a detachable elastic sealing plug (62) and a sealing strip (61). The elastic sealing plug (62) is assembled in the inlet hole (11) and the outlet channel (12), and the sealing strip (61) is embedded in the joint between the main body (1) and the top cover (2).

4. The box structure of an electricity metering box according to claim 3, characterized in that: The sealing strip (16) adopts a double-layer hollow structure design and is made of EPDM rubber.

5. The box structure of an electricity metering box according to claim 1, characterized in that: The internal support module (4) includes an energy meter mounting rail (41), a circuit breaker fixing slot (42), and a terminal block mounting position (43). The energy meter mounting rail (41) and the inner cavity of the main body (1) adopt a detachable standardized structure. The surface of the energy meter mounting rail (41) is provided with a circuit breaker fixing slot (42) and a terminal block mounting position (43).

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