Reliable protection glue pouring box assembly for ultrasonic water meter

Abstract

The reliably-protected glue pouring box assembly for the ultrasonic water meter comprises a glue pouring box and a cover plate, an opening is formed in the upper portion of the glue pouring box, a concave cavity used for containing a circuit board is formed in the glue pouring box, and the cover plate is arranged above the circuit board, fixedly arranged at the opening in the upper portion of the glue pouring box and used for protecting the circuit board. The outer edge face of the cover plate and the inner wall face of the glue filling box are arranged in a spaced mode to form a glue filling opening and an exhaust seam. The glue filling device is reasonable in structure, convenient in glue filling operation and favorable for improving the performance of electronic components.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic water meters, in particular to a glue-filling box component with reliable protection for ultrasonic water meters. Background Art

[0002] With the development of society, the application of ultrasonic water meters in the water meter market is gradually replacing traditional mechanical water meters. They usually include upper and lower shells, which are arranged above the fluid channel. The upper and lower shells form a accommodating cavity that contains electronic components such as circuit boards, power supplies and communication modules. Usually, a glue potting box is also provided in the aforementioned accommodating cavity, and electronic components such as circuit boards are placed in the glue potting box. Glue potting is used to seal the box to achieve a reliable sealing level.

[0003] In production practice, the glue filling box is made of transparent material and is inverted on electronic components such as circuit boards. As shown in the Chinese proposal of the patent application with application number CN202220684835.3, entitled An Ultrasonic Water Meter, during the glue filling operation, the glue filling box needs to be transported to the glue filling room and placed with the opening facing upwards. After glue filling, it needs to be dried for more than 24 hours before continuing to the production line for subsequent assembly of other components. The glue filling process is cumbersome, and often bubbles remain due to poor exhaust during glue filling, which in turn causes problems such as unclear display on the circuit board and poor antenna signal reception. Utility Model Content

[0004] The utility model discloses a reliable protective glue potting box assembly for ultrasonic water meters, which solves the technical problems of the prior art such as complicated glue potting process, poor glue potting quality, and disadvantages in improving the performance of electronic components. The utility model has a reasonable structure, convenient glue potting operation, and is conducive to improving the performance of electronic components. The technical solution adopted is as follows:

[0005] A glue potting box assembly with reliable protection for an ultrasonic water meter includes a glue potting box and a cover plate. The glue potting box has an opening at the top and forms a cavity for accommodating a circuit board. The cover plate is arranged above the circuit board and fixedly mounted at the opening above the glue potting box to protect the circuit board. The outer edge surface of the cover plate is spaced apart from the inner wall surface of the glue potting box to form a glue potting port and an exhaust slit.

[0006] On the basis of the above technical solution, the exhaust slit is annular and extends along the outer edge of the cover plate, and the outer edge of the cover plate is partially recessed inward to form at least one glue filling port.

[0007] Based on the above technical solution, the width of the exhaust slit is not less than 1 mm.

[0008] On the basis of the above technical solution, the cover plate is made of a transparent or translucent material, and a rib plate is integrally formed on the cover plate.

[0009] On the basis of the above technical solution, the outer edge of the cover plate extends upward to form a curling edge, and the glue potting liquid level is submerged above the top surface of the curling edge, so as to improve the sealing reliability of the glue potting.

[0010] Based on the above technical solution, the height of the curling edge is at least 2 mm, and the level of the glue pouring liquid is at least 5 mm below the top surface of the curling edge.

[0011] Based on the above technical solution, at least one protective groove is provided on the inner side of the curling edge, and the width of the protective groove is at least 3 mm.

[0012] Based on the above technical solution, the area of ​​the cover plate facing the circuit board partially protrudes upward to form a protective cavity. The protective cavity is designed so that the level of the glue potting liquid can close the protective cavity while leaving a gap with the inner bottom surface of the protective cavity. Preferably, the curled edge forms a protective groove with the rib plate or the outer wall of the protective cavity.

[0013] On the basis of the above technical solution, the functional element on the circuit board corresponding to the position of the protective cavity passes through the glue potting layer and extends into the protective cavity.

[0014] Based on the above technical solution, the width of the protective groove formed between the curling edge and the protective cavity or rib plate is at least 3 mm.

[0015] Based on the above technical solution, the outer wall of the glue pouring box is provided with a wire clamping groove, and one side of the wire clamping groove is open; the top surface of the glue pouring box is provided with a plurality of limit blocks, and a wire passing groove is formed between the plurality of limit blocks, and the bottom surface of the glue pouring box is provided with a wire passing hole.

[0016] Beneficial effects

[0017] The utility model has a reasonable structure, the opening of the glue pouring box is arranged to face upward, and the glue pouring port is open, which facilitates the glue pouring operation and makes the glue pouring process visual. The cover plate is fixed at the opening of the glue pouring box and can protect electronic components such as circuit boards, wherein an exhaust gap and a glue pouring port are formed between the cover plate and the glue pouring box, which not only simplifies the structure and avoids the need to additionally arrange a glue pouring port and an exhaust port, but also makes the exhaust process more uniform and smoother, which is beneficial to improving the uniformity of glue pouring, reducing the generation of bubbles, and thus improving the glue pouring quality.

[0018] In addition, the curling setting on the cover increases the contact area between the cover and the glue layer, and the glue liquid level is at least 5mm below the top surface of the curling edge, which can further enhance the reliability of the glue sealing and ensure the IP68 sealing protection level even in harsh operating environments such as long-term immersion in water or drastic temperature changes.

[0019] In addition, at least one protective groove is provided on the cover plate. On the one hand, the protective groove is conducive to enhancing the structural strength of the cover plate. On the other hand, the protective groove is embedded in the glue layer. Even in the case of large temperature differences, it can ensure that the shrinkage rate of the glue layer and the cover plate is consistent, avoiding the occurrence of cracking on the contact surface due to different material shrinkage rates, thereby having excellent sealing reliability.

[0020] The cover plate of this invention also forms multiple protective cavities. The glue layer seals the openings of the protective cavities and leaves a gap with the bottom surface of the protective cavity. This allows functional components on the circuit board, such as display components, antenna components, and communication components, to extend into the sealed cavities within the protective cavity, ensuring the proper functioning of the functional components on the circuit board. Furthermore, during the glue pouring operation, the glue enters the protective cavity from the bottom up, sealing it and compressing the air within it, creating a pressure differential between the inside and outside of the protective cavity. This further enhances the sealing performance and effectively isolates it from external moisture. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0022] Figure 1 : Schematic diagram of the explosion structure of the glue box assembly assembled on the ultrasonic water meter;

[0023] Figure 2 : Schematic diagram of the explosion structure of the utility model;

[0024] Figure 3 : Schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 4 : A schematic structural diagram of a top view of the utility model; DETAILED DESCRIPTION

[0026] The following description and accompanying drawings sufficiently illustrate the specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, including all available equivalents thereof. Herein, the terms "first," "second," and the like are used solely to distinguish one element from another and do not require or imply any actual relationship or order between these elements. In practice, the first element can also be referred to as the second element, and vice versa. Furthermore, the terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a structure, device, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such structure, device, or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the structure, device, or apparatus comprising the element. The various embodiments herein are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Similar or identical parts between the various embodiments can be referenced to each other.

[0027] The terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are intended only to facilitate the description of this document and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In the description herein, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, they can be mechanical or electrical connections, or they can be internal connections between two elements, they can be directly connected, or they can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] As used herein, unless otherwise specified, the term "plurality" means two or more.

[0029] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0030] In this article, the term "and / or" is used to describe the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0031] like Figures 1 to 4The glue-filling box assembly for ultrasonic water meter with reliable protection shown in the figure includes a glue-filling box 3 and a cover plate 5;

[0032] The top of the glue potting box 3 is open and forms a cavity for accommodating the circuit board 4, wherein the circuit board 4 is clamped in the glue potting box 3, and the cover plate 5 is arranged above the circuit board 4 and clamped at the top opening of the glue potting box 3 for protecting the circuit board 4.

[0033] like Figure 4 As shown, the outer edge of the cover plate 5 is spaced from the inner wall of the glue potting box 3 to form a glue potting port 31 and a venting slit 32. The venting slit 32 is annular and extends along the outer edge of the cover plate 5. The outer edge of the cover plate 5 is partially recessed inward to form two glue potting ports 31. The two glue potting ports 31 are symmetrically arranged. During glue potting, gas can be exhausted from all sides of the cover plate 5. This can quickly exhaust gas, reduce the generation of bubbles or gas accumulation, and improve glue potting quality. In this embodiment, the venting slit width is 1-2 mm.

[0034] Among them, the cover plate 5 is made of transparent or translucent material, which makes the glue pouring process visual, convenient for glue pouring operation and glue pouring monitoring. The cover plate 5 is integrally formed with a rib plate, which can greatly improve the structural strength of the cover plate to cope with the shrinkage rate of the cover plate caused by large high and low temperature cross-changes, which is beneficial to improving structural stability.

[0035] like Figure 2 and 3 As shown, the area of ​​the cover plate 5 facing the circuit board 4 partially protrudes upward to form a protective cavity 52. ​​The protective cavity 52 is designed so that the glue liquid level can close the protective cavity 52 and leave a gap with the inner bottom surface of the protective cavity 52. ​​In this embodiment, the cover plate 5 and the areas corresponding to the positions of the display screen component, antenna component, communication component and operation button on the circuit board 4 protrude upward to form the protective cavity 52. ​​The display screen component, antenna component, communication component and operation button all pass through the glue layer and extend into the protective cavity 52, thus having good sealing reliability.

[0036] like Figure 2 As shown, the outer edge of the cover plate 5 extends upward to form a curled edge 51. The curled edge 51 is at least 2 mm high to increase the contact area with the glue layer, which is conducive to improving the sealing reliability. The glue liquid level is 5-8 mm below the top surface of the curled edge, further improving the reliability of the glue sealing. In addition, to facilitate the control of the glue liquid level, in this embodiment, the glue liquid level is slightly lower than the top surface of the glue box 3. This makes it easier to control the glue liquid level during the glue filling operation.

[0037] like Figure 3 and 4As shown, a protective groove 53 is provided on the inner side of the curling edge 51. Specifically, the protective groove 53 is formed between the curling edge 51 and the outer wall of the protective cavity 52 and the rib plate. The width of the protective groove 53 is at least 3 mm. In this embodiment, only one protective groove 53 is provided. In other embodiments of the present invention, multiple protective grooves 53 can be provided to further enhance the sealing and protection effect and avoid cracking at the joint surface due to different shrinkage rates of the glue layer and the cover plate 5.

[0038] In addition, a baffle 54 is provided on the cover plate 5 , the top surface of the baffle 54 is higher than the top surface of the rib plate or the curling edge 51 , and electronic components can be arranged in the baffle to avoid protecting the electronic components.

[0039] As shown in the figure, the outer wall of the glue potting box 3 is provided with a wire clamping groove 33, which extends horizontally along the outer wall of the glue potting box 3. The wire clamping groove 33 is open on one side, making it convenient for wires to be clamped into it to organize the wires. The top surface of the glue potting box 3 is provided with a plurality of limiting blocks 34, and a wire passage trough is formed between the plurality of limiting blocks 34. The wire passage trough and the wire clamping groove 33 are arranged in a one-to-one correspondence, making it convenient for wires to be flipped sideways into the glue potting box 3 for welding or plugging. In addition, the height of the limiting blocks 34 is designed so that when the glue potting box 3 is assembled in the housing of the ultrasonic water meter, which includes an upper housing 1 and a lower housing 2, the limiting blocks 34 abut against the inner top surface of the upper housing 1 upwardly, thereby limiting the glue potting box 3 and the upper housing 1 and facilitating the wires to pass through the wire passage trough.

[0040] In addition, a wire hole is provided on the bottom surface of the glue potting box 3. In this embodiment, a rubber plug is plugged at the wire hole. The rubber plug is provided with multiple through holes. Electrical wires can pass upward through the through holes into the glue potting box 3 for welding or plugging. After glue potting, the glue seals and solidifies the rubber plug.

[0041] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments. Any changes or modifications based on the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A reliable protective glue box assembly for ultrasonic water meter, characterized in that: The invention comprises a glue potting box (3) and a cover plate (5), wherein the glue potting box (3) has an opening at the top and forms a cavity for accommodating a circuit board (4), and the cover plate (5) is arranged above the circuit board (4) and fixed at the opening at the top of the glue potting box (3) for protecting the circuit board (4). The outer edge surface of the cover plate (5) is spaced apart from the inner wall surface of the glue potting box (3) to form a glue potting port (31) and an exhaust slit (32).

2. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 1 is characterized in that: The exhaust slit (32) is annular and extends along the outer edge of the cover plate, and the outer edge of the cover plate (5) is partially recessed inward to form at least one glue injection port (31).

3. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 2, characterized in that: The width of the exhaust slit (32) is not less than 1 mm.

4. The reliable protective glue potting box assembly for ultrasonic water meters according to any one of claims 1 to 3, characterized in that: The cover plate (5) is made of a transparent or translucent material, and a rib plate is integrally formed on the cover plate (5).

5. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 4, characterized in that: The outer edge of the cover plate (5) extends upward to form a curling edge (51), and the level of the glue pouring liquid is below the top surface of the curling edge (51), so as to improve the sealing reliability of the glue pouring.

6. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 5, characterized in that: The height of the curling edge (51) is at least 2 mm, and the level of the glue filling liquid is at least 5 mm below the top surface of the curling edge (51).

7. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 5, characterized in that: At least one protective groove (53) is provided on the inner side of the curling edge (51), and the width of the protective groove (53) is at least 3 mm.

8. The reliable protective glue potting box assembly for ultrasonic water meters according to any one of claims 5 to 7, characterized in that: The area of ​​the cover plate (5) facing the circuit board (4) partially protrudes upward to form a protective cavity (52), and the protective cavity (52) is designed so that the surface of the glue filling liquid can close the protective cavity (52) and leave a gap with the inner bottom surface of the protective cavity (52).

9. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 8, characterized in that: Functional elements on the circuit board (4) corresponding to the position of the protective cavity (52) pass through the glue-filling layer and extend into the protective cavity (52).

10. The reliable protection glue potting box assembly for ultrasonic water meter according to claim 9, characterized in that: The outer wall surface of the glue pouring box (3) is provided with a wire clamping groove (33), and one side of the wire clamping groove (33) is open; the top surface of the glue pouring box (3) is provided with a plurality of limit blocking columns (34), and a wire passing groove is formed between the plurality of limit blocking columns (34); and the bottom surface of the glue pouring box (3) is provided with a wire passing hole.

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