Electronic module protection box lead structure

Abstract

The utility model relates to an electronic module protection box lead structure, lead structure set up on a metal casing, lead structure include sealing cover, sealing nut, connecting wire and wire harness sealing ring, metal casing bottom is provided with wire inlet hole and circular sealing groove, sealing cover is fixed on circular sealing groove, sealing nut is screwed on sealing cover, wire harness sealing ring sets up between sealing cover and sealing nut, connecting wire passes sealing nut, wire harness sealing ring and sealing cover in proper order and then stretches into circular sealing groove, wire inlet hole has the binding post of screw thread and is screwed, the binding post bottom is connected with connecting wire, circular sealing groove has filled with insulating oil, compared with the prior art, the utility model has waterproof sealing effect is good, ensures water table long -term stable work etc.

Description

Technical Field

[0001] This utility model relates to the field of smart water meter technology, and in particular to an electronic module protective box lead wire structure. Background Technology

[0002] Water meters are installed in complex and varied environments, including indoors, outdoors, and some even in underground wells. Our water meters may operate for extended periods in low-lying, damp, or even flooded environments. With technological advancements, prepaid valve-controlled water meters and wireless remote-reading water meters are widely used globally. Due to the significant uncertainties in installation and usage environments, most electronic smart water meters are powered by lithium batteries. Furthermore, relevant standards and water company requirements stipulate long service lifespans for these meters, necessitating low-power designs. Therefore, strengthening the protection of the water meter's electronic components is crucial to ensuring long-term stable operation.

[0003] Currently, most smart water meters installed in underground wells on the market adopt a split-type structure design. This means that the electronic sensors or electric actuators that drive valve switches, which are inseparable from the water meter base, are fixed to the base meter through a waterproof enclosure. The antenna, or simultaneously the electronic module, is encapsulated and hung on the top of the well wall, connecting to the sensors or electric actuators. In waterproof enclosure designs, components such as metal shells or glass covers that prevent water penetration are often used, achieving good protective effects in testing and use. However, preventing water, especially water vapor, from seeping in through the wire inlet remains a difficult problem for many water meter manufacturers. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide an electronic module protection box lead structure.

[0005] The objective of this utility model can be achieved through the following technical solutions: An electronic module protective box lead wire structure is disclosed, wherein the lead wire structure is mounted on a metal housing; the lead wire structure includes a sealing cover, a sealing nut, a connecting wire, and a wire harness sealing ring; the bottom of the metal housing is provided with an inlet hole and a circular sealing groove; the sealing cover is fixed to the circular sealing groove; the sealing nut is screwed onto the sealing cover; the wire harness sealing ring is disposed between the sealing cover and the sealing nut; the connecting wire passes through the sealing nut, the wire harness sealing ring, and the sealing cover in sequence and extends into the circular sealing groove; a terminal is threaded onto the inlet hole; the bottom of the terminal is connected to the connecting wire; the circular sealing groove is filled with insulating oil.

[0006] Furthermore, the sealing cap is fixed to the circular sealing groove by three sealing cap mounting screws.

[0007] Furthermore, an O-ring rubber ring is provided between the sealing cap and the circular sealing groove.

[0008] Furthermore, a sealing rubber ring is also provided at the bottom of the inner part of the sealing cover.

[0009] Furthermore, two O-rings are provided between the inlet hole and the terminal block.

[0010] Furthermore, an electronic module is disposed inside the metal housing; the top of the wiring terminal extends into the metal housing and is connected to the electronic module.

[0011] Compared with the prior art, the present invention has the following advantages: This invention forms a sealed cavity by assembling a sealing cap onto a circular sealing groove, combined with corresponding O-rings and other components. This cavity seals the connecting wires and terminals within the cavity. Insulating oil is then poured into the circular sealing groove. Utilizing the insulating and fluid properties of the oil, the cavity is filled, unaffected by thermal expansion and contraction, and free from the risk of adhesion or peeling from the circular sealing groove. Even after prolonged operation in humid or submerged environments, any trace amounts of water or water vapor leaking from the rubber ring seal into the sealed cavity are prevented from entering the electronic component protective sealing box by the insulating oil, effectively enhancing the sealing performance and ensuring the long-term normal and stable operation of the water meter. Attached Figure Description

[0012] Figure 1 A schematic diagram of the cross-sectional structure of the lead wire structure provided by this utility model; Figure 2 This is a schematic diagram of the top structure of the lead wire structure provided by this utility model.

[0013] The labels in the diagram indicate: 1. Metal housing; 2. Sealing cover O-ring; 3. Sealing cover; 4. Sealing nut; 5. Connecting wire; 6. Wire harness sealing ring; 7. Sealing rubber ring; 8. Terminal O-ring; 9. Terminal; 10. Sealing cover mounting screw; 11. Inlet hole; 12. Circular sealing groove; 13. Electronic module. Detailed Implementation

[0014] 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. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0018] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. Example

[0020] like Figure 1 and 2As shown, an electronic module protective box lead wire structure is provided. The lead wire structure is mounted on a metal housing 1 and is used to connect electronic components while also providing a waterproof seal. The lead wire structure includes a sealing cover 3, a sealing nut 4, a connecting wire 5, and a wire harness sealing ring 6. The bottom of the metal housing 1 is provided with an inlet hole 11 and a circular sealing groove 12. The sealing cover 3 is fixed to the circular sealing groove 12 by three sealing cover mounting screws 10. The sealing nut 4 is screwed onto the sealing cover 3. The wire harness sealing ring 6 is disposed between the sealing cover 3 and the sealing nut 4. The connecting wire 5 passes through the sealing nut 4 and the wire harness sealing ring 6 in sequence. The ring 6 and the sealing cap 3 extend into the circular sealing groove 12; a terminal 9 is threaded onto the inlet hole 11; the bottom of the terminal 9 is connected to the connecting wire 5; electronic components such as the electronic module 13 are installed inside the metal housing 1; the top of the terminal 9 extends into the metal housing 1 and connects to the electronic components such as the electronic module 13; to improve the sealing performance of the lead wire structure, a sealing cap O-ring 2 is provided between the sealing cap 3 and the circular sealing groove 12; a sealing rubber ring 7 is also provided at the bottom of the sealing cap 3; two terminal O-rings 8 are provided between the inlet hole 11 and the terminal 9. The circular sealing groove 12 is filled with insulating oil. Utilizing the insulating and fluid properties of the insulating oil, the circular sealing groove 12 is filled without being affected by thermal expansion and contraction, and there is no risk of adhesion or peeling from the circular sealing groove 12. When the water meter operates in a humid or submerged environment for a long time, even if a small amount of water or water vapor leaks from the various rubber ring seals into the circular sealing groove 12, it is blocked by the insulating oil and cannot enter the metal casing 1 to affect electronic components such as the electronic module 13. This effectively enhances the sealing performance and ensures that the water meter operates normally and stably for a long time.

[0021] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An electronic module protection box lead structure, characterized by, The lead wire structure is mounted on a metal housing (1); the lead wire structure includes a sealing cap (3), a sealing nut (4), a connecting wire (5), and a wire harness sealing ring (6); the bottom of the metal housing (1) is provided with an inlet hole (11) and a circular sealing groove (12); the sealing cap (3) is fixed on the circular sealing groove (12); the sealing nut (4) is screwed onto the sealing cap (3); the wire harness sealing ring (6) is located between the sealing cap (3) and the sealing nut (4); the connecting wire (5) passes through the sealing nut (4), the wire harness sealing ring (6), and the sealing cap (3) in sequence and then extends into the circular sealing groove (12); a terminal (9) is threaded onto the inlet hole (11); the bottom of the terminal (9) is connected to the connecting wire (5); the circular sealing groove (12) is filled with insulating oil.

2. The lead structure of an electronic module protection box according to claim 1, wherein, The sealing cap (3) is fixed to the circular sealing groove (12) by three sealing cap mounting screws (10).

3. The lead structure of an electronic module protection box according to claim 1, wherein, A sealing cover O-ring (2) is provided between the sealing cover (3) and the circular sealing groove (12).

4. The lead wire structure of an electronic module protection box according to claim 1, characterized in that, A sealing rubber ring (7) is also provided at the bottom of the inner part of the sealing cover (3).

5. The lead wire structure of an electronic module protection box according to claim 1, characterized in that, Two O-ring rubber rings (8) are provided between the inlet hole (11) and the terminal block (9).

6. The lead structure of an electronic module protection box according to claim 1, wherein, An electronic module (13) is provided inside the metal housing (1); the top of the wiring terminal (9) extends into the metal housing (1) and is connected to the electronic module (13).

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