Electricity larceny prevention structure of three-phase intelligent electric energy meter

Abstract

The utility model provides an electricity larceny prevention structure of a three-phase intelligent electric energy meter, which belongs to the technical field of electric energy meters and comprises a rectangular mounting seat, one side of the mounting seat is provided with a protective bottom shell and a protective top shell through a lockable slide fastener structure, and the protective bottom shell and the protective top shell are arranged on the other side of the mounting seat. The protective bottom shell and the protective top shell are mutually buckled and connected to form a shell together, an electromagnetic shielding layer is arranged in the shell, the electromagnetic shielding layer is tightly attached to the inner surfaces of the three-phase protective bottom shell and the three-phase protective top shell and adopts a multi-layer composite structure, guide rail strips are vertically and fixedly connected to two long edges of one side of the mounting seat, and the guide rail strips are connected with the guide rail strips. According to the electricity larceny prevention structure, the defects that a traditional electricity larceny prevention structure is insufficient in safety and poor in internal interference and protection are overcome, and the electricity larceny prevention performance is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of electricity meter technology, specifically, it relates to an anti-theft structure for a three-phase smart electricity meter. Background Technology

[0002] With the widespread application of electric energy in various sectors of modern society, three-phase smart meters, as key equipment for electricity metering and monitoring, play a crucial role in the normal operation of the power system and the protection of the interests of both power suppliers and consumers. Three-phase smart meters are mainly used in three-phase power supply scenarios such as industrial production, commercial complexes, and large-scale building facilities. They can accurately measure the consumption of three-phase electricity and, through intelligent functions, realize data transmission, remote monitoring, power analysis, and other operations, providing an efficient and convenient means for power management. However, in practical applications, three-phase smart meters face a severe challenge in preventing electricity theft.

[0003] In terms of casing structure, traditional three-phase smart meters typically use simple splicing or snap-fit ​​connections, which are easily damaged by external force or illegally opened. Traditional three-phase smart meters also have limited security features. For example, the locking devices on the casing are usually just simple screws or basic latches, which are easily cracked or damaged. Utility Model Content

[0004] In view of this, the present invention provides a three-phase smart energy meter anti-theft structure that solves the shortcomings of traditional anti-theft structures, such as insufficient security and weak internal interference and protection.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a three-phase smart energy meter anti-theft structure, including a mounting base, wherein the mounting base is rectangular, and a protective bottom shell and a protective top shell are mounted on one side of the mounting base through a lockable sliding buckle structure. The protective bottom shell and the protective top shell are interlocked and connected to each other to form a housing, and an electromagnetic shielding layer is provided inside the housing.

[0007] The electromagnetic shielding layer is tightly bonded to the inner surfaces of the three-phase protective bottom shell and the three-phase protective top shell. It employs a multi-layered composite structure. From the outside in, the first layer is a high-permeability metal foil, such as nickel-zinc ferrite foil. This foil effectively absorbs and attenuates low-frequency electromagnetic interference signals, shielding most external low-frequency magnetic fields outside the shell. Above the high-permeability metal foil, a copper mesh is applied, and above that, a conductive silver paste coating is applied. These three layers work together to form a full-frequency electromagnetic shielding system, providing a reliable electromagnetic protection environment for the internal energy metering unit of the three-phase smart energy meter. This effectively prevents external electromagnetic interference from affecting metering accuracy and also eliminates the possibility of illegal theft of internal electromagnetic signals, greatly improving the anti-theft performance and operational stability of the three-phase smart energy meter.

[0008] Based on the above technical solution, the anti-theft structure of the three-phase smart energy meter of this utility model can be further improved as follows:

[0009] The mounting base has guide rails vertically fixedly connected to two long sides on one side, and a sliding groove is formed between the guide rails and the mounting base. The inner surface of the sliding groove is provided with a wear-resistant coating.

[0010] The wear-resistant coating is made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction and excellent wear resistance, effectively reducing wear caused by the sliding fastener sliding within the sliding groove. It also possesses good chemical stability and corrosion resistance, allowing it to adapt to various complex environments, extending the service life of the sliding groove and the sliding fastener, and ensuring the stability and reliability of the connection between the three-phase protective bottom shell and the three-phase protective top shell during long-term use.

[0011] Furthermore, the protective bottom shell and the protective top shell are each fixedly connected to a sliding fastener adapted to the sliding groove on their corresponding side walls.

[0012] Furthermore, the protective top shell is provided with multiple anti-theft lock slots, and the edges of the anti-theft lock slots are provided with metal reinforcing rings.

[0013] The metal reinforcing ring is made of stainless steel and has a ring-shaped structure. Its inner diameter is the same as the diameter of the anti-theft lock slot, and it is tightly connected to the edge of the anti-theft lock slot by welding.

[0014] Furthermore, the protective base shell is fixedly connected with a plurality of U-shaped latches that match the anti-theft latch slots, and the inner side of the U-shaped latches is provided with rubber buffer pads.

[0015] A rubber buffer pad is adhered to the inner surface of the U-shaped latch using adhesive. The shape of the rubber buffer pad matches the inner contour of the U-shaped latch, covering the portion of the U-shaped latch that contacts the anti-theft latch slot. When the U-shaped latch is inserted into the anti-theft latch slot, the rubber buffer pad acts as a cushion, preventing direct collision and wear between the U-shaped latch and the anti-theft latch slot. It also reduces latch loosening due to vibration and other factors, extending the service life of the latch and latch slot, and ensuring the long-term stability and reliability of the connection between the three-phase protective bottom shell and the three-phase protective top shell.

[0016] Furthermore, the sliding fastener is elongated and is fixedly connected to the corresponding side walls of the protective bottom shell and the protective top shell by welding or bonding. It is located near the bottom edge and corresponds to the position of the guide rail and the sliding groove.

[0017] Furthermore, a maintenance opening is provided on the protective bottom shell, and a sealing door panel is connected to the inside of the maintenance opening via a hinge. A sealing strip is provided on one edge of the sealing door panel, and a pull ring groove is provided on the other side of the sealing door panel for easy opening.

[0018] For example, the metal mounting base is made of aluminum alloy.

[0019] Furthermore, a shock-absorbing mounting base plate is fixedly connected to the lower end of the mounting base, and an elastic buffer plate for supporting the protective bottom shell is fixedly connected to the shock-absorbing mounting base plate. A metal reinforcing plate is fixedly connected to the lower end of the elastic buffer plate.

[0020] The elastic buffer plate is made of a composite of rubber and metal.

[0021] Furthermore, the anti-theft latch slot is circular and is distributed near the edge of the protective top shell, with equal spacing between adjacent anti-theft latch slots.

[0022] Each anti-theft latch slot is formed by stamping on the three-phase protective top shell. Its depth matches the thickness of the U-shaped latch, ensuring a tight fit and preventing loosening after insertion. In terms of connection, the anti-theft latch slot and the three-phase protective top shell are an integral structure. This integrated molding method enhances its structural strength, improves its resistance to damage, and effectively prevents unauthorized opening of the three-phase protective top shell.

[0023] Furthermore, the mounting base is made of metal.

[0024] This allows the mounting base to better withstand the weight of the three-phase smart energy meter and potential external impacts, ensuring the stability of the overall structure. Meanwhile, the use of a lockable sliding buckle structure instead of the original snap-fit ​​method improves the robustness and safety of the connection between the three-phase protective bottom shell and the three-phase protective top shell. The electromagnetic shielding layer effectively prevents external electromagnetic interference from affecting energy metering and also prevents the illegal interception of internal electromagnetic signals.

[0025] Compared with existing technologies, the beneficial effects of the anti-theft structure for a three-phase smart energy meter provided by this utility model are:

[0026] This invention employs a rectangular, reinforced metal mounting base, which, compared to traditional structures, can better withstand the weight and external impacts of a three-phase smart meter. It is connected to the three-phase protective bottom and top shells via a lockable sliding buckle structure. This connection method is not only convenient to install but also far more robust than traditional simple splicing or snap-fit ​​methods. For example, in the event of external impact or malicious damage, the metal mounting base provides stable support, and the sliding buckle structure effectively prevents the protective shell from easily detaching, greatly improving the overall structural integrity of the meter casing and effectively preventing criminals from stealing electricity by damaging the casing connection.

[0027] The three-phase protective bottom shell and the three-phase protective top shell are interlocked and connected, and both are equipped with an electromagnetic shielding layer. This electromagnetic shielding layer effectively prevents external electromagnetic interference from affecting the electricity metering unit, ensuring metering accuracy. It also prevents the illegal interception of internal electromagnetic signals, thus preventing electricity theft via electromagnetic means. Simultaneously, the protective shell is made of high-strength materials. For example, the anti-theft lock slot on the three-phase protective top shell has a metal reinforcing ring on its edge. Made of stainless steel, this metal reinforcing ring effectively disperses stress when subjected to external impact, protecting the anti-theft lock slot from easy damage and greatly enhancing the overall protective shell's resistance to damage. This provides a reliable physical protective barrier for the three-phase smart electricity meter.

[0028] The guide rail and sliding groove design on one side of the metal mounting base provide precise guidance and stable limiting function for the installation of the three-phase protective bottom shell and the three-phase protective top shell. The inner surface of the sliding groove formed between the guide rail and the metal mounting base is coated with a wear-resistant coating, such as a PTFE (polytetrafluoroethylene) coating, which effectively reduces wear caused by the sliding fasteners sliding within the groove. This not only ensures the accuracy of the three-phase protective shell during installation, allowing for precise alignment and avoiding structural instability or excessive gaps due to installation deviations, but also extends the service life of the components. It ensures that the connection between the three-phase protective shell and the metal mounting base remains stable and reliable during long-term use, reducing safety hazards caused by component wear and effectively preventing theft risks due to loose meter housings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an example diagram of an anti-theft structure for a three-phase smart energy meter;

[0031] Figure 2 Example diagram of a mounting base for an anti-theft structure of a three-phase smart energy meter;

[0032] Figure 3 Rear view of the protective bottom shell of a three-phase smart energy meter's anti-theft structure;

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 10. Mounting base; 11. Sliding buckle structure; 111. Guide rail; 112. Sliding groove; 20. Protective bottom shell; 21. U-shaped lock; 22. Sealing door panel; 30. Protective top shell; 31. Anti-theft lock slot. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0036] like Figures 1-3 The image shows a first embodiment of an anti-theft structure for a three-phase smart energy meter provided by this utility model. In this embodiment, a mounting base 10 is included, wherein the mounting base 10 is rectangular, and a protective bottom shell 20 and a protective top shell 30 are mounted on one side of the mounting base 10 through a lockable sliding buckle structure 11. The protective bottom shell 20 and the protective top shell 30 are fastened together to form a shell, and an electromagnetic shielding layer is provided inside the shell.

[0037] In the above technical solution, guide rails 111 are vertically fixedly connected to the two long sides of one side of the mounting base 10. A sliding groove 112 is formed between the guide rails 111 and the mounting base 10. The inner surface of the sliding groove 112 is provided with a wear-resistant coating.

[0038] Furthermore, in the above technical solution, the side walls of the protective bottom shell 20 and the protective top shell 30 are fixedly connected with sliding fasteners that are adapted to the sliding groove 112.

[0039] Furthermore, in the above technical solution, the protective top shell 30 is provided with multiple anti-theft lock slots 31, and the edges of the anti-theft lock slots 31 are provided with metal reinforcing rings.

[0040] Furthermore, in the above technical solution, a plurality of U-shaped latches 21 that match the anti-theft latch slots 31 are fixedly connected to the protective bottom shell 20, and the inner side of the U-shaped latches 21 is provided with rubber buffer pads.

[0041] When the three-phase protective bottom case and the three-phase protective top case are assembled together, the U-shaped latch on the bottom case moves upward with the bottom case, gradually approaching the anti-theft latch slot on the top case. Since the opening of the U-shaped latch faces upward and is located at the corresponding position on the bottom case, during the complete closure process, the upper curved part of the U-shaped latch smoothly slides into the anti-theft latch slot on the top case, achieving a tight locking connection, much like hooking a U-shaped hook into a corresponding slot. This method ensures the secure closure of the meter case and provides anti-theft electrical security.

[0042] Furthermore, in the above technical solution, the sliding fastener is elongated and is fixedly connected to the corresponding side walls of the protective bottom shell 20 and the protective top shell 30 by welding or bonding. It is located near the bottom edge and corresponds to the position of the guide rail 111 and the sliding groove 112.

[0043] Furthermore, in the above technical solution, a maintenance opening is provided on the protective bottom shell 20, and a sealing door plate 22 is connected inside the maintenance opening via a hinge. A sealing strip is provided on one edge of the sealing door plate 22, and a pull ring groove is provided on the other side of the sealing door plate 22 for easy opening.

[0044] Furthermore, in the above technical solution, a shock-absorbing mounting base plate is fixedly connected to the lower end of the mounting base 10, an elastic buffer plate for supporting the protective bottom shell 20 is fixedly connected to the shock-absorbing mounting base plate, and a metal reinforcing plate is fixedly connected to the lower end of the elastic buffer plate.

[0045] Furthermore, in the above technical solution, the anti-theft lock slot 31 is circular, and the anti-theft lock slot 31 is distributed near the edge of the protective top shell 30, with the distance between two adjacent anti-theft lock slots 31 being equal.

[0046] Furthermore, in the above technical solution, the mounting base 10 is made of metal.

[0047] Specifically, the principle of this utility model is as follows:

[0048] The electromagnetic shielding layers inside the three-phase protective bottom and top shells, as well as the double-layered metal plate partitions with insulating material sandwiched between the metering chambers, are all based on the principle of electromagnetic shielding. According to electromagnetic theory, when a conductor is in a changing electromagnetic field, an induced current is generated. This induced current produces a magnetic field opposite to the original magnetic field, thus canceling out the influence of the original magnetic field. In three-phase smart meters, the electromagnetic shielding layers and the metal parts of the metering chamber partitions effectively block external electromagnetic fields from interfering with the internal energy metering unit, ensuring the accuracy of energy measurement. Simultaneously, they prevent the electromagnetic field generated by the internal energy metering unit from leaking outwards, avoiding the use of electromagnetic means by criminals to steal electricity. For example, in some industrial environments, there are numerous motors, transformers, and other equipment that generate strong electromagnetic fields. If the three-phase smart meter lacks adequate electromagnetic shielding, external electromagnetic fields may interfere with the metering circuit, causing deviations in the measurement results. Alternatively, criminals may use specific electromagnetic signals to interfere with the internal circuitry of the meter to steal electricity. The electromagnetic shielding structure of this invention can effectively resist these external interferences, ensuring the normal operation and metering accuracy of the electricity meter.

[0049] The mounting base features a rectangular, reinforced structure, providing a large load-bearing area and high structural strength, effectively distributing the weight of the three-phase smart meter and mitigating potential external impacts. The lockable sliding buckle structure utilizes the principles of friction and locking mechanisms in mechanics when connecting the three-phase protective bottom and top shells. During installation, the tight fit between the sliding fastener, guide rail, and sliding groove generates sufficient friction to stably fix the protective shell to the metal mounting base. Simultaneously, the locking engagement of the U-shaped latch and the anti-theft latch further restricts the displacement of the protective shell in all directions, forming a stable mechanical structure. For example, when subjected to external impact, the metal mounting base can withstand most of the impact force and distribute it evenly to all connection points. The sliding and locking structures effectively limit the deformation and displacement of the protective shell, preventing cracking or loosening, thus protecting the internal energy metering unit and avoiding the risk of electricity theft due to shell damage.

Claims

1. A three-phase intelligent electric energy meter anti-theft structure, comprising a mounting seat (10), characterized in that, The mounting base (10) is rectangular, one side of the mounting base (10) is provided with a protective bottom shell (20) and a protective top shell (30) through a lockable slide buckle structure (11), the protective bottom shell (20) and the protective top shell (30) are connected with each other to form a shell, and an electromagnetic shielding layer is arranged in the shell.

2. The power stealing prevention structure of a three-phase smart electric energy meter according to claim 1, characterized in that, Two long edges of one side of the mounting base (10) are vertically and fixedly connected with guide rails (111), the guide rails (111) and the mounting base (10) form a sliding groove (112) therebetween, and a wear-resistant coating is arranged on the inner surface of the sliding groove (112).

3. The power stealing prevention structure of a three-phase smart meter according to claim 2, characterized in that, The side walls of the protective bottom shell (20) and the protective top shell (30) are fixedly connected with slide buckles matched with the sliding groove (112).

4. The power stealing prevention structure of a three-phase smart meter according to claim 3, characterized in that, A plurality of anti-theft lock buckle grooves (31) are formed in the protective top shell (30), and metal reinforcing rings are arranged on the edges of the anti-theft lock buckle grooves (31).

5. The power stealing prevention structure of a three-phase smart meter according to claim 4, wherein, A plurality of U-shaped lock buckles (21) matched with the anti-theft lock buckle grooves (31) are fixedly connected to the protective bottom shell (20), and rubber buffer pads are arranged on the inner sides of the U-shaped lock buckles (21).

6. The power stealing prevention structure of a three-phase smart meter according to claim 5, wherein, The slide buckle is in a strip shape, is fixedly connected to the corresponding side walls of the protective bottom shell (20) and the protective top shell (30) through welding or bonding, is located near the bottom edge, and corresponds to the positions of the guide rails (111) and the sliding groove (112).

7. The power stealing prevention structure of a three-phase smart meter according to claim 6, wherein, A maintenance opening is formed in the protective bottom shell (20), a sealing door plate (22) is hingedly connected to the inside of the maintenance opening, a sealing rubber strip is arranged on one side edge of the sealing door plate (22), and a pull ring groove facilitating opening is arranged on the other side of the sealing door plate (22).

8. The power stealing prevention structure of a three-phase smart meter according to claim 7, wherein, A shock-absorbing mounting bottom plate is fixedly connected to the lower end of the mounting base (10), an elastic buffer load plate for supporting the protective bottom shell (20) is fixedly connected to the shock-absorbing mounting bottom plate, and a metal reinforcing plate is fixedly connected to the lower end of the elastic buffer load plate.

9. The power stealing prevention structure of a three-phase smart meter according to claim 8, wherein, The anti-theft lock buckle grooves (31) are circular, the anti-theft lock buckle grooves (31) are arranged near the edges of the protective top shell (30), and the distances between adjacent two anti-theft lock buckle grooves (31) are equal.

10. The power stealing prevention structure of a three-phase smart meter according to claim 9, wherein, The mounting base (10) is made of metal.

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