NFC-based intelligent water meter box

Abstract

The application discloses an NFC-based intelligent water meter box, mainly solves the problems of easy falling of an NFC module, signal interference of a metal box body and complicated maintenance in the prior art. A gravity self-locking NFC clamping block is arranged in the box, a reverse L-shaped buckle is arranged at the bottom of a clamping plate which is hung through a rotating shaft, and zero-operation mechanical locking is realized by embedding the gravity natural droop into a wedge-shaped groove of a fixing block; three layers of anti-interference connecting pipes are arranged in the water meter box, are composed of an inner insulating sleeve, an electromagnetic shielding layer and an outer waterproof coating, and are matched with an inclined lead pipe and a connecting clamp with a sealing ring to synchronously solve the problems of electromagnetic interference and waterproofness; and a cooperative heat dissipation system is arranged, a convection air duct is formed through honeycomb holes of a heat dissipation back plate and a hollow support, and a bottom labyrinth type filter screen is used for dustproof and drainage. The water meter box has the advantages of anti-vibration falling, stable signal transmission and tool-free maintenance, and is suitable for outdoor humid and vibrating environments.

Description

Technical Field

[0001] This utility model relates to the field of municipal water supply facilities technology, specifically to an NFC-based smart water meter box. Background Technology

[0002] Water meter boxes are common civil infrastructure facilities, widely used in civil infrastructure construction in towns, cities, and towns of all sizes. The structural features of a water meter box are: an open back panel; an inlet pipe notch on the rear side wall for the water inlet pipe; and an outlet pipe notch on the rear top wall for the water outlet pipe. The box includes multiple small doors and one large door, and can be equipped with observation windows and billing vents as needed.

[0003] Smart water meter boxes are an intelligent upgrade of traditional municipal water meter boxes. By integrating IoT, sensors, and communication technologies, they enable location tracking, asset management, monitoring, and anomaly alerts for the water meter box's status. Their core objective is to improve the safety, management efficiency, and emergency response capabilities of urban infrastructure. In NFC smart water meter boxes, the NFC chip is fixed inside the box, typically using bolts or adhesive. However, long-term exposure to water flow vibrations and box deformation can cause it to loosen and fall off, leading to communication interruptions. Furthermore, the humid environment inside the water meter box can cause exposed wiring to age prematurely over time, posing a certain degree of safety risk. Utility Model Content

[0004] This utility model addresses the problems existing in the prior art by providing an NFC-based smart water meter box. It includes a water meter box body, an opening and closing handle on the front of the body, and an NFC sensing area. Its features are as follows:

[0005] It also includes an NFC card stack and an anti-interference connector;

[0006] The NFC card assembly is fixed to the inner wall of the water meter box body, and includes an upper fixing block, a lower fixing block and an NFC card plate between the two.

[0007] The NFC card is movably connected to the upper fixed block via a pivot, and its bottom is provided with a limiting post and a self-locking buckle.

[0008] The self-locking buckle naturally hangs down under the action of gravity and locks into the slot of the lower fixing block, forming a self-locking structure;

[0009] The anti-interference connecting tube is sleeved on the outside of the NFC module's cable and includes an inner insulating sleeve and an outer waterproof coating.

[0010] Preferably, a torsion spring is provided at the pivot connection between the NFC card plate and the upper fixing block, so that the card plate remains vertical when there is no external force, and the limiting post abuts against the side wall of the upper fixing block to ensure that the self-locking buckle is accurately embedded in the card slot.

[0011] Preferably, the anti-interference connecting pipe is provided with connecting clamps at both ends, with an elastic sealing ring embedded inside the clamps, and extends outward to form a lower extension line interface, and the metal braided layer of the pipe body is covered with a waterproof coating.

[0012] Preferably, the back of the water meter box body is provided with a heat dissipation back plate, and the upper and lower sides of the heat dissipation back plate are welded with component fixing brackets, and the outer surface is stamped to form a honeycomb heat dissipation hole array.

[0013] Preferably, the NFC sensing area is embedded in a non-metallic window inside the box cover, the window is positioned directly opposite the NFC card plate of the NFC card assembly, the window thickness is ≤2mm and the material is wave-transparent engineering plastic.

[0014] Preferably, the self-locking buckle is an inverted L-shaped sheet metal part, which engages with the wedge-shaped groove of the lower fixing block when its horizontal section hangs down under gravity.

[0015] Preferably, a lead pipe is provided through the side wall of the water meter box body, and an anti-interference connecting pipe is embedded in the inner wall of the lead pipe, with the pipe opening tilted at 30°-45° to prevent water accumulation.

[0016] Preferably, the component mounting bracket is a hollow aluminum alloy bracket, with a mounting surface and a heat dissipation backplate spaced ≥10mm apart to form a convection airflow channel, and a grounding terminal is provided at the edge of the bracket.

[0017] Preferably, the connecting clamp is a split stainless steel clamp with an insulating sleeve on the inner wall and anti-loosening screws and a waterproof glue groove on the outer wall.

[0018] Preferably, the bottom of the water meter box body is provided with a drainage vent, and the vent is embedded with a labyrinth-type dustproof filter, the height of which is ≥50mm lower than the NFC card assembly installation position.

[0019] Compared with the prior art, this utility model provides an NFC-based smart water meter box, which has the following advantages: Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the support arm structure in a specific embodiment of the present utility model;

[0023] Figure 3 This is a structural diagram of the NFC card assembly in a specific embodiment of the present invention;

[0024] Figure 4 This is a structural diagram of the anti-interference connecting pipe in a specific embodiment of this utility model.

[0025] In the diagram: 1. Water meter box body; 2. Opening and closing handle; 3. NFC sensing area; 4. Lead wire pipe; 5. Heat dissipation backplate; 6. NFC card assembly block; 7. Anti-interference connecting pipe; 8. Component fixing bracket; 101. Upper fixing block; 102. Lower fixing block; 103. NFC card plate; 104. Limiting post; 105. Self-locking buckle; 201. Connecting clamp; 202. Insulating sleeve; 203. Waterproof coating; 204. Lower extension cable. Detailed Implementation

[0026] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to 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 present invention.

[0029] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0030] Example 1:

[0031] like Figure 1-4As shown, the smart water meter box is equipped with an NFC card assembly 6 inside, which is used to fix the NFC chip. The NFC card assembly 6 consists of an upper fixing block 101 welded to the top of the inner wall of the water meter box body 1, a lower fixing block 102 50mm directly below, and an NFC card plate 103 between the two.

[0032] The NFC card plate 103 is connected to the upper fixing block 101 via a stainless steel rotating shaft. A torsion spring is pre-installed inside the rotating shaft to keep the card plate always vertically downward. An inverted L-shaped self-locking buckle 105 is welded to the bottom of the card plate, and its horizontal section hangs down due to gravity. A limiting post 104 is provided above the self-locking buckle 105, which abuts against the side wall of the upper fixing block 101 when locked.

[0033] The main assembly and usage steps are as follows:

[0034] The staff welded the upper fixing block to the top of the inner wall of the water meter box, and fixed the lower fixing block 50mm directly below it; then the NFC card was connected to the upper fixing block through a stainless steel shaft. The shaft was pre-installed with a torsion spring so that the card always kept vertically downward; an inverted L-shaped self-locking buckle was welded to the bottom of the card, and a limit post was provided above the L-shaped self-locking buckle.

[0035] When the NFC chip is placed inside the NFC card block 6, the card plate naturally droops due to gravity, and the horizontal section of the self-locking buckle is embedded in the wedge-shaped card slot of the lower fixing block. At this time, the limiting post abuts against the side wall of the upper fixing block 101 to prevent the buckle from shifting.

[0036] When the NFC chip needs to be replaced or repaired, staff can push the card plate upwards by about 30° to overcome the torsion spring force and gravity, causing the self-locking latch to disengage from the card slot, thus removing the NFC chip. This NFC card block 6 achieves zero-power self-locking during the NFC chip fixing process solely through gravity and mechanical structure, is vibration-resistant, and requires no tools, effectively reducing subsequent maintenance costs.

[0037] Furthermore, the anti-interference connector 7 is sleeved on the outside of the NFC module cable, and its layered structure includes:

[0038] Inner insulation sleeve 202: made of silicone, tightly wrapping the cable;

[0039] Intermediate electromagnetic shielding layer: copper braided mesh coverage reaches 95%;

[0040] External waterproof coating 203: epoxy resin spraying, with a thickness of 0.5mm.

[0041] The tube body is equipped with two separate stainless steel connecting clamps 201 at both ends, with an insulating sleeve on the inner wall; the inner side of the clamp is fitted with an elastic sealing ring, and the outer wall is equipped with anti-loosening screws and waterproof glue grooves; the clamp extends outward to form a lower extension cable interface 204 to support the extension line.

[0042] The specific installation method of the anti-interference connection tube is as follows: the cable passes through the lead tube 4 and is locked at both ends with the connecting clamp 201; at the same time, the clamps on both sides of the cable are split stainless steel clamps with embedded rubber sealing rings and are fixed by anti-loosening screws; the lower extension line 204 interface has a reserved spare extension position, and the interface is injected with waterproof sealant.

[0043] During use, the anti-interference connecting pipe 7 can achieve integrated physical protection and electromagnetic shielding, and is suitable for sealed water meter boxes.

[0044] Furthermore, the back of the water meter box body 1 integrates a heat dissipation structure, including a heat dissipation backplate 5: the outer surface is stamped with a φ3mm honeycomb heat dissipation hole array;

[0045] Component mounting bracket 8: A hollow aluminum alloy bracket, welded to the upper and lower sides of the heat sink back plate; the distance between the mounting surface of the bracket and the heat sink back plate is ≥10mm, forming a bottom-up convection airflow channel; grounding terminals are provided on the edge of the bracket to discharge static electricity.

[0046] The water meter box also features an internal drainage design.

[0047] The bottom of the water meter box is equipped with an 8mm drainage vent and an embedded labyrinth-style dust filter. The filter is 60mm lower than the NFC card assembly installation position to achieve the purpose of drainage and dust prevention.

[0048] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0049] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0050] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An NFC-based smart water meter box, comprising a water meter box body, an opening / closing handle on the front of the body, and an NFC sensing area, characterized in that: It also includes an NFC card stack and an anti-interference connector; The NFC card assembly is fixed to the inner wall of the water meter box body, and includes an upper fixing block, a lower fixing block and an NFC card plate between the two. The NFC card is movably connected to the upper fixed block via a pivot, and its bottom is provided with a limiting post and a self-locking buckle. The self-locking buckle naturally hangs down under the action of gravity and locks into the slot of the lower fixing block, forming a self-locking structure; The anti-interference connecting tube is sleeved on the outside of the NFC module's cable and includes an inner insulating sleeve and an outer waterproof coating.

2. The smart water meter box according to claim 1, characterized in that, A torsion spring is provided at the pivot connection between the NFC card plate and the upper fixing block, so that the card plate remains vertical when there is no external force. The limiting post abuts against the side wall of the upper fixing block to ensure that the self-locking buckle is accurately embedded in the card slot.

3. The intelligent water meter box according to claim 1, characterized in that, The anti-interference connecting pipe is equipped with connecting clamps at both ends. The inner side of the clamp is fitted with an elastic sealing ring, which extends outward to form a lower extension line interface. The metal braided layer of the pipe body is covered with a waterproof coating.

4. The smart water meter box according to claim 1, characterized in that, The back of the water meter box is equipped with a heat dissipation back plate, and component fixing brackets are welded on the upper and lower sides of the heat dissipation back plate. The outer surface is stamped to form a honeycomb heat dissipation hole array.

5. The intelligent water meter box according to claim 1, characterized in that, The NFC sensing area is embedded in the non-metallic window inside the box cover. The window is positioned directly opposite the NFC card plate of the NFC card assembly. The window thickness is ≤2mm and the material is wave-transparent engineering plastic.

6. The smart water meter box according to claim 1, characterized in that, The self-locking buckle is an inverted L-shaped sheet metal part, which engages with the wedge-shaped groove of the lower fixing block when its horizontal section hangs down due to gravity.

7. The intelligent water meter box according to claim 1, characterized in that, The water meter box body is provided with a through-conduit pipe on the side wall, and an anti-interference connecting pipe is embedded in the inner wall of the through-conduit pipe. The pipe opening is inclined at 30°-45° to prevent water accumulation.

8. The smart water meter box according to claim 4, characterized in that, The component mounting bracket is a hollow aluminum alloy bracket, with a mounting surface and a heat dissipation backplate distance of ≥10mm to form a convection air duct, and a grounding terminal is provided on the edge of the bracket.

9. The intelligent water meter box according to claim 3, characterized in that, The connecting clamp is a split stainless steel clamp with an insulating sleeve on the inner wall and anti-loosening screws and a waterproof glue groove on the outer wall.

10. The smart water meter box according to claim 1, characterized in that, The bottom of the water meter box is provided with a drainage vent, and the vent is embedded with a labyrinth-style dust filter. The height of the filter is ≥50mm lower than the NFC card assembly installation position.

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