Rail type intelligent electric energy meter with strong and weak electric safety isolation structure

Abstract

The utility model relates to the technical field of power electronic equipment, concretely relates to a guide rail type intelligent electric energy meter with strong and weak electric safety isolation structure. It includes shell body and sets up the terminal installation interface on shell body, and the terminal installation interface includes strong electric installation interface, weak electric installation interface and rotates and is installed between strong electric installation interface and weak electric installation interface's isolation flap, and the isolation flap contains the baffle body and connects the quick board body on the baffle body, and the baffle body covers strong electric installation interface when rotating to the first shielding position, and the baffle body covers weak electric installation interface when rotating to the second shielding position. The guide rail type intelligent electric energy meter has comprehensively considered the compact space characteristic of guide rail type intelligent electric energy meter, can provide active type safety partition on the physical level, solves the technical safety problem brought by strong / weak electric terminal space adjacent layout thoroughly, and thoroughly eliminates the wiring operation risk of operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of power electronic equipment technology, and specifically to a rail-mounted smart energy meter with a strong and weak current safety isolation structure. Background Technology

[0002] Driven by smart grids and refined energy management, DIN rail-mounted energy meters with data communication capabilities have become key components in low-voltage power distribution systems. Among them, DIN rail-mounted smart energy meters, due to their modular and compact design, can be efficiently integrated into space-constrained distribution boxes, enabling real-time metering and remote data transmission of single-phase line electricity consumption, thus meeting the urgent energy efficiency management needs of building automation, industrial control, and other fields.

[0003] However, while the DIN rail-mounted smart energy meter offers convenience due to its minimal installation space requirements, it also introduces additional technical safety risks. Specifically, in order to simultaneously achieve both high-voltage metering and low-voltage communication functions within the extremely limited standard module width, its high-voltage terminals (used for connecting phase and neutral lines) and low-voltage terminals (such as RS-485 communication interfaces and pulse output terminals) are forced to be physically very close together. This results in both electrical clearances and creepage distances being at a critical state, leading to significant technical safety risks.

[0004] Specifically, the close proximity of high-voltage and low-voltage terminals significantly increases the risks associated with field wiring and subsequent maintenance. Within the confined space of a distribution box, operators' tools (such as screwdrivers) are highly susceptible to slippage, or improper handling of wire ends (such as excessively long cable burrs) can instantly trigger short circuits between the terminals, generating arcs, damaging equipment, and even causing safety accidents. Current technologies typically limit isolation between high-voltage and low-voltage terminals to "passive" designs such as optimizing PCB layout, using higher-grade insulation materials, or applying conformal coating. While these offer some safety protection, they are insufficient to effectively address the dynamic and high-risk nature of field wiring and cannot completely eliminate electrical safety risks. Utility Model Content

[0005] The purpose of this utility model is to provide a rail-mounted smart energy meter with a strong and weak current safety isolation structure. It takes into account the compact space characteristics of the rail-mounted smart energy meter, and can provide active safety isolation at the physical level, completely solving the technical safety problems caused by the close proximity of strong and weak current terminals, and completely eliminating the wiring operation risks for operators.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rail-mounted smart energy meter with a strong and weak current safety isolation structure includes a housing and a terminal mounting interface disposed on the housing. The terminal mounting interface includes a strong current mounting interface, a weak current mounting interface, and an isolation flap rotatably mounted between the strong current mounting interface and the weak current mounting interface. The isolation flap includes a shielding plate and a quick-release plate connected to the shielding plate. When the shielding plate is rotated to a first shielding position, it covers the strong current mounting interface. When the shielding plate is rotated to a second shielding position, it covers the weak current mounting interface.

[0007] As a preferred embodiment of this utility model, the rail-mounted smart energy meter with a strong and weak current safety isolation structure further includes a protective cover that is detachably connected to the housing and is used to cover the terminal mounting interface.

[0008] As a preferred embodiment of the present invention, the protective cover includes an outer protective cover body and a limiting plate that is vertically fixedly connected to the inner side of the outer protective cover body near the outer shell body.

[0009] As a preferred embodiment of this utility model, the end of the limiting plate away from the outer protective cover abuts against the outer surface of the isolation flap located at the first blocking position.

[0010] As a preferred embodiment of this utility model, the rail-mounted smart energy meter with a strong and weak current safety isolation structure further includes an isolation flap fixing frame installed on the outer casing; the shielding plate is rotatably mounted on the isolation flap fixing frame.

[0011] As a preferred embodiment of the present invention, the isolation flap further includes friction pressing parts disposed on two sides of the shielding plate body, the friction pressing parts being used to slide against two support plates of the isolation flap fixing frame.

[0012] As a preferred embodiment of this utility model, when the shielding plate is in the first shielding position, the end of the quick-release plate that is away from the low-voltage installation interface is suspended on the outer side of the outer casing.

[0013] As a preferred embodiment of this invention, the width of the quick-release plate is smaller than the width of the shielding plate.

[0014] As a preferred embodiment of this invention, the width of the quick-release plate is 1 / 3 of the width of the blocking plate.

[0015] As a preferred embodiment of this invention, all outer surfaces of the isolation flap are provided with an electrical insulation coating.

[0016] In summary, the beneficial effects of this utility model are as follows: 1. This utility model, by setting an isolation flap that can rotate between the high-voltage and low-voltage installation interfaces, can completely block the terminals on the other side as a reliable physical barrier when wiring terminals on one side; thereby fundamentally eliminating the risk of short circuits in high and low voltage circuits caused by tool slippage, wire burrs, or operational errors, and providing dynamic and proactive safety protection for operators.

[0017] 2. In this utility model, the isolation flap adopts an integrated design of a "full-size" shielding plate and a "narrow" quick-release plate. The quick-release plate is suspended in the air for easy finger or tool operation, and its width is smaller than that of the shielding plate to ensure operability in a limited space. The entire isolation mechanism is installed through the isolation flap fixing frame, which is structurally stable and does not require too much extra space, perfectly adapting to the compact installation environment of the guide rail.

[0018] 3. In this utility model, all outer surfaces of the isolation flap are provided with an electrical insulation coating, which enhances the insulation performance. In addition, when the protective cover and its limiting plate are closed, they can abut against and lock the isolation flap in the blocked position, preventing it from accidentally popping open, thus forming a second safety barrier.

[0019] 4. In this utility model, the design of the friction extrusion part provides appropriate damping for the isolation flap, enabling it to remain stably in any working position and optimizing the operating experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the rail-mounted smart energy meter of this utility model; Figure 2 This is a schematic diagram of the terminal mounting interface of this rail-mounted smart energy meter; Figure 3 This is a schematic diagram of the isolation flap in this rail-mounted smart energy meter; Figure 4 This is a schematic diagram of the installation structure of the protective cover of this rail-mounted smart energy meter; Figure 5 This is a schematic diagram showing the suspended state of the quick-release plate in this rail-mounted smart energy meter.

[0022] In the diagram: 1. Outer shell; 2. Terminal mounting interface; 21. High-voltage mounting interface; 22. Low-voltage mounting interface; 23. Isolation flap; 231. Shielding plate; 232. Quick-release plate; 233. Friction pressing part; 3. Protective cover; 31. Outer protective cover; 32. Limiting plate; 4. Isolation flap fixing frame. Detailed Implementation

[0023] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. Any person may implement the present disclosure in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. It should be understood that when component A is fixedly connected to component C via component B, changes in the relative positional relationship due to deformation of components A, B, and C are permitted. "Rotary connection" refers to a connection where components can rotate relative to each other after connection. "Sliding connection" refers to a connection where components can slide relative to each other after connection. The phrase "two components forming an integrated structure through a one-piece molding process" means that during the formation of one of the two components, that component is connected to the other component, without requiring further processing (such as bonding, welding, snap-fit ​​connections, or screw connections) to connect the two components.

[0025] like Figures 1 to 5 As shown, in this embodiment of the rail-mounted smart energy meter, the outer casing 1 has a standard 1P modular width. The terminal mounting interface 2 is located on the upper part of the outer casing 1, wherein the high-voltage mounting interface 21 and the low-voltage mounting interface 22 are arranged adjacently and vertically.

[0026] The isolation flap 23 includes a shielding plate body 231 and a quick-release plate body 232 connected to the shielding plate body 231. Furthermore, this 1P rail-mounted smart energy meter also includes an isolation flap fixing bracket 4 mounted on the outer casing 1. The shielding plate body 231 is rotatably mounted on the isolation flap fixing bracket 4. Specifically, a pivot or protruding half-shaft is provided at one end of the shielding plate body 231 near the outer casing 1, which, when engaged with the receiving shaft hole at the bottom of the isolation flap fixing bracket 4, allows the isolation flap 23 to flexibly rotate within a 90° range. The isolation flap fixing bracket 4 is fixed to the outer casing 1 by clips or screws.

[0027] It should be noted that when the isolation flap 23 covers the high-voltage installation interface 21, it is defined as being in the first obstruction position; when the isolation flap 23 covers the low-voltage installation interface 22, it is defined as being in the second obstruction position. Therefore, the flexible rotation of the isolation flap 23 within a 90° range allows for switching between the first and second obstruction positions.

[0028] The width of the quick-release plate 232 is smaller than the width of the shielding plate 231. In this embodiment, preferably, the width of the quick-release plate 232 is set to 1 / 3 of the width of the shielding plate 231. Since the shielding task is completed by the shielding plate 231, the function of the quick-release plate 232 is to minimize the total area of ​​the isolation flap 23 and ensure the operability of the isolation flap 23 in a confined space.

[0029] Furthermore, when the shielding plate 231 is in the first shielding position, the end of the quick-release plate 232 away from the low-voltage installation interface 22 is suspended above the outer surface of the housing 1. This design allows the operator's fingers or tools to easily apply force to the quick-release plate 232, enhancing blind operation capability. The suspended length of the quick-release plate 232 is preferably 1mm, ensuring both operability and small size.

[0030] In addition, the 1P rail-mounted smart energy meter of this embodiment also includes a protective cover 3 detachably connected to the outer casing 1 and used to shield the terminal mounting interface 2. The protective cover 3 includes an outer protective cover body 31 and a limiting plate 32 vertically fixedly connected to the inner side of the outer protective cover body 31 near the outer casing 1. After installation, the isolation flap 23 is in the first shielding position, which aims to continuously and stably shield the high-voltage mounting interface 21. At this time, the end of the limiting plate 32 away from the outer protective cover body 31 abuts against the outer surface of the isolation flap 23 located in the first shielding position. In this way, after the protective cover 3 and the limiting plate 32 on it are closed, they can abut against and lock the isolation flap 23 in the first shielding position, preventing it from accidentally popping open, thus forming a second safety barrier.

[0031] In this embodiment, the isolation flap 23 further includes friction pressing parts 233 disposed on two sides of the shielding plate body 231. The friction pressing parts 233 are used to slide against the two support plates of the isolation flap fixing frame 4. The friction pressing parts 233 can be hemispherical protrusions. Since the isolation flap fixing frame 4 is a plastic elastic element, after being pressed by the hemispherical protrusions, combined with slight deformation and friction, the isolation flap 23 can be temporarily locked in the second shielding position, thereby facilitating the installation of high-voltage cables by operators and safely shielding the low-voltage installation interface 22. The design of the friction pressing parts 233 provides appropriate damping for the isolation flap 23, optimizing the operating experience.

[0032] When wiring, if it is necessary to connect to high-voltage power first, the quick-release plate 232 can be moved towards the second shielding position, causing the isolation flap 23 to flip towards the low-voltage installation interface 22. At this time, the low-voltage installation interface 22 is completely covered by the shielding plate 231, and the operator can safely connect the high-voltage wires. After the high-voltage wiring is completed, the quick-release plate 232 is moved towards the first shielding position, causing the shielding plate 231 to completely cover the high-voltage installation interface 21, and then the low-voltage terminal wiring operation is performed. The friction pressing part 233 ensures that the flap has appropriate friction during rotation and can be stably stopped in the required position.

[0033] After all wiring is completed, close the protective cover 3. The limiting plate 32 on the protective cover 3 will abut against the isolation flap 23 in the first shielding position to prevent it from accidentally popping open, forming a second layer of protection.

[0034] In another possible embodiment, all outer surfaces of the isolation flap 23 are provided with an electrical insulating coating, which also provides additional insulation protection.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The structural materials, dimensions, shapes, etc., mentioned in the embodiments of this application are all illustrative descriptions and do not constitute strict or absolute limitations. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rail-mounted smart energy meter with a strong and weak current safety isolation structure, comprising a housing (1) and a terminal mounting interface (2) disposed on the housing (1), characterized in that, The terminal mounting interface (2) includes a high-voltage mounting interface (21), a low-voltage mounting interface (22), and an isolation flap (23) rotatably mounted between the high-voltage mounting interface (21) and the low-voltage mounting interface (22); the isolation flap (23) includes a shielding plate (231) and a quick-release plate (232) connected to the shielding plate (231); the shielding plate (231) covers the high-voltage mounting interface (21) when rotated to the first shielding position; the shielding plate (231) covers the low-voltage mounting interface (22) when rotated to the second shielding position.

2. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 1, characterized in that, The rail-mounted smart energy meter with a strong and weak current safety isolation structure also includes a protective cover (3) that is detachably connected to the outer casing (1) and is used to cover the terminal mounting interface (2).

3. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 2, characterized in that, The protective cover (3) includes an outer protective cover body (31) and a limiting plate (32) that is vertically fixed to the inner side of the outer protective cover body (31) near the outer shell body (1).

4. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 3, characterized in that, The end of the limiting plate (32) away from the outer protective cover (31) abuts against the outer surface of the isolation flap (23) located at the first blocking position.

5. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 1, characterized in that, The rail-mounted smart energy meter with a strong and weak electrical safety isolation structure also includes an isolation flap fixing frame (4) installed on the outer casing (1); the shielding plate (231) is rotatably installed on the isolation flap fixing frame (4).

6. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 5, characterized in that, The isolation flap (23) also includes friction pressing parts (233) disposed on two sides of the shield body (231), the friction pressing parts (233) being used to slide against two support plates of the isolation flap fixing frame (4).

7. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 1, characterized in that, When the shielding plate (231) is in the first shielding position, the end of the quick dial plate (232) away from the low-voltage installation interface (22) is suspended on the outer side of the outer shell (1).

8. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 7, characterized in that, The width of the quick-release plate (232) is smaller than the width of the shield plate (231).

9. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to claim 8, characterized in that, The width of the quick dial plate (232) is 1 / 3 of the width of the shield plate (231).

10. A rail-mounted smart energy meter with a strong and weak current safety isolation structure according to any one of claims 1-9, characterized in that, All outer surfaces of the isolation flap (23) are provided with an electrical insulation coating.

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