CN218336800U

CN218336800U - PCB sealing structure of water meter

Info

Publication number: CN218336800U
Application number: CN202222255651.8U
Authority: CN
Inventors: 张洪灏; 何南海; 邓正强
Original assignee: Zhejiang Chint Instrument and Meter Co Ltd
Current assignee: Zhejiang Chint Instrument and Meter Co Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-01-17
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a PCB board seal structure of water gauge, include: the PCB comprises a base, a PCB and a window cover plate, wherein a cavity is arranged on the base; the PCB board is installed in the cavity, the window cover plate is covered on the cavity, the top of the window cover plate is provided with a glue injection port and a glue overflow port, the glue injection port and the glue overflow port are both communicated with the cavity, and the upper edge of the glue injection port is not lower than the upper edge of the glue overflow port. The sealing structure is simple and has good sealing performance.

Description

PCB sealing structure of water meter

Technical Field

The utility model relates to a water gauge encapsulation technology field, concretely relates to PCB board seal structure of water gauge.

Background

With the development of science and technology, the demand for water meter intellectualization is increasing, and mechanical water meters are becoming mainstream gradually. However, the installation environment of the water meter is severe, and the installation environment mainly includes the conditions of the open air, the inspection well, the deep burying and the like, and the mechanical water meter is internally provided with precise parts, so that the water meter can work in the underwater environment or in the high-temperature and high-humidity environment for a long time. For the intelligent water meter, the protective requirements of the controller part are very high, the water meter needs to be sealed, and the oxidation of parts in the mechanical water meter is avoided, so that the performance is influenced.

In the prior art, in an intelligent control part of a water meter, the protection mode of main electronic components comprises the following points: spraying three-proofing paint, nano coating and wax dipping. However, the three-proofing paint is easy to get damp and lose efficacy when being soaked in water for a long time; the nano coating is expensive and the process operation is complex; after wax dipping, the wax is sensitive to temperature and is easy to lose efficacy in a high-temperature state. The protection mode of prior art is with high costs, and sealed effect is not good.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the water gauge electronic parts among the prior art protection with high costs, the not good defect of sealed effect to a PCB board seal structure and sealing method of water gauge are provided.

In order to solve the technical problem, the technical scheme of the utility model as follows:

according to the utility model discloses a PCB board seal structure of water gauge in some embodiments, include: the PCB comprises a base, a PCB and a window cover plate, wherein a cavity is arranged on the base; the PCB is installed in the cavity; the window cover plate is covered at the opening of the cavity and provided with a glue injection port and a glue overflow port, the glue injection port and the glue overflow port are both communicated with the cavity, and the upper edge of the glue injection port is not lower than the upper edge of the glue overflow port.

According to some embodiments of the utility model, the perisporium that the base corresponds the cavity is equipped with spacing step face, the lower terminal surface of window apron is equipped with and is annular fender gluey gusset, keep off gluey gusset the lower terminal surface with spacing step face butt.

According to some embodiments of the utility model, the base corresponds still be equipped with on the inner wall of cavity and be located the spacing buckle of spacing step face top works as keep off the lower terminal surface of glued gusset with during spacing step face butt, the lower terminal surface of spacing buckle with keep off the up end of glued gusset and offset.

According to some embodiments of the utility model, spacing buckle one side up is equipped with and is convenient for keep off the leading-in oblique guide surface of glued gusset.

According to some embodiments of the utility model, be equipped with on the base and stretch into spliced pole in the cavity, the PCB board pass through the connecting piece with spliced pole fixed connection.

According to some embodiments of the utility model, be equipped with the locating hole on the PCB board, the connecting piece passes the locating hole with the spliced pole is connected.

According to some embodiments of the utility model, the base still is equipped with the battery chamber, the battery chamber is located the below of cavity, one side of cavity is equipped with the intercommunication the cavity with the line chamber of walking in battery chamber, the power cord of connecting on the PCB board passes through walk the line chamber and stretch into in the battery chamber.

According to some embodiments of the utility model, walk the line intracavity and fill and be provided with the sealing plug, be equipped with on the sealing plug and walk the line hole, the power cord passes walk on the sealing plug and walk the line hole and stretch into in the battery chamber.

According to the utility model discloses a some embodiments, the PCB board will first cavity and second cavity are split into to the cavity, the PCB board is equipped with glues the hole, it communicates to cross to glue the hole first cavity with the second cavity.

According to some embodiments of the utility model, the outward flange of window apron be equipped with the base corresponds the inner wall sealing connection's of cavity and seals gluey groove.

The utility model discloses technical scheme has following advantage:

the utility model provides a water gauge's PCB board seal structure, the PCB board is installed in the cavity of base, and window apron lid is established on the cavity to sealed PCB board. The top of window apron is equipped with all with cavity injecting glue mouth and excessive gluey mouth, through sealed from injecting glue mouth toward the injecting glue in the cavity, through observing excessive gluey mouth, controls the injecting glue volume, and this seal structure is simple, and the leakproofness is good, and the operation of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a PCB board seal arrangement of a water meter in some embodiments of the invention;

FIG. 2 is a partial schematic view of FIG. 1 at A;

fig. 3 is a schematic structural view of a window cover plate according to some embodiments of the present invention.

Description of reference numerals: 1. a base; 2. a PCB board; 3. a window cover plate; 4. a sealing plug; 11. a cavity; 12. a wiring cavity; 13. a battery cavity; 14. a positioning column; 15. a limiting step surface; 16. a limiting buckle; 21. passing through a glue hole; 22. positioning holes; 23. a power line; 31. a glue injection port; 32. a glue overflow port; 33. sealing a glue groove; 34. a glue blocking rib plate; 41. a wiring hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, in some embodiments of the present invention, a PCB sealing structure of a water meter includes: the device comprises a base 1, a PCB 2 and a window cover plate 3, wherein a cavity 11 is arranged on the base 1; the PCB 2 is arranged in the cavity 11; on window apron 3 lid was located cavity 11, the top of window apron 3 was equipped with injecting glue mouth 31 and excessive gluey mouth 32, and injecting glue mouth 31 and excessive gluey mouth 32 all communicate with cavity 11, and the last border of injecting glue mouth 31 is not less than the last border of excessive gluey mouth 32.

Specifically, in PCB board 2 located base 1's cavity 11, window apron 3 lid was located cavity 11 top in order to seal PCB board 2, and window apron 3's top is equipped with all with cavity 11 injecting glue mouth 31 and overflow gluey mouth 32, through filling glue from injecting glue mouth 31 toward cavity 11 and sealing, through observing overflow gluey mouth 32, controls the injecting glue volume, and this seal structure is simple, the operation of being convenient for.

It can be understood that the upper edge of the glue injection opening 31 is not lower than the upper edge of the glue overflow opening 32, and when glue is injected from the glue injection opening 31, the glue flows out from the glue overflow opening 32 after the cavity 11 is filled with the glue.

Referring to fig. 2 and 3, in some embodiments of the present invention, the peripheral wall of the cavity 11 corresponding to the base 1 is provided with a limiting step surface 15, the lower end surface of the window cover plate 3 is provided with an annular glue blocking rib plate 34, and the lower end surface of the glue blocking rib plate 34 abuts against the limiting step surface 15.

Specifically, the limiting step surface 15 is used for facilitating installation of the window cover plate 3 in the cavity 11, and the glue blocking rib plate 34 arranged on the lower end surface of the window cover plate 3 facilitates connection of the limiting step surface 15 and the window cover plate 3 after glue injection, so that sealing performance is improved.

The utility model discloses an in some embodiments, still be equipped with the spacing buckle 16 that is located spacing step face 15 top on the inner wall that base 1 corresponds cavity 11, when keeping off the lower terminal surface of gluey gusset 34 and spacing step face 15 butt, spacing buckle 16's lower terminal surface offsets with the up end that keeps off gluey gusset 34.

Specifically, in the glue injection process, the window cover plate 3 is easy to jack up due to the buoyancy of the glue, so that sealing cannot be performed. Be equipped with spacing buckle 16 in the top of spacing step face 15, during installation window apron 3, when the lower terminal surface of fender glue gusset 34 and spacing step face 15 butt, the lower terminal surface of spacing buckle 16 offsets with the up end of fender glue gusset 34, and a decurrent pressure is applyed to the up end of fender glue gusset 34 to the lower terminal surface of spacing buckle 16, avoids window apron 3 to lead to the leakproofness not good because the buoyancy of glue floats.

In some embodiments of the present invention, the upward side of the limiting buckle 16 is provided with an inclined guide surface for guiding the glue blocking rib plate 34.

Specifically, in order to facilitate the disassembly and assembly of the window cover plate 3, an inclined guide surface is arranged on the upward side of the limiting buckle 16, and the inclined guide surface facilitates the installation of the glue blocking rib plate 34 into the cavity 11.

In some embodiments of the present invention, the base 1 is provided with a connecting post extending into the cavity 11, and the PCB board 2 is fixedly connected to the connecting post through a connecting member.

In some embodiments of the present invention, the PCB board 2 is provided with a positioning hole 22, and the connecting member passes through the positioning hole 22 and is connected to the connecting column.

Specifically, the connecting member is a screw, and the connecting member passes through the positioning hole 22 and the connecting column to connect to fix the PCB board 2 inside the cavity 11 of the base 1.

In some embodiments of the present invention, the base 1 further has a battery cavity 13, the battery cavity 13 is located below the cavity 11, one side of the cavity 11 is provided with a wiring cavity 12 communicating the cavity 11 and the battery cavity 13, and a power line 23 connected to the pcb 2 extends into the battery cavity 13 through the wiring cavity 12.

The utility model discloses a some embodiments, walk line chamber 12 intussuseption and fill in and be provided with sealing plug 4, are equipped with on the sealing plug 4 and walk line hole 41, and power cord 23 passes and walks on the sealing plug 4 and walk line hole 41 and stretch into in the battery chamber 13.

Specifically, the PCB 2 needs to be connected to a power supply, a battery cavity 13 is disposed at the bottom of the cavity 11, a power cord 23 welded to the PCB 2 is disposed at one side of the PCB 2, and the power cord 23 passes through the wiring cavity 12 and is connected to the power supply in the battery cavity 13. In order to avoid the problem that glue flows into the battery cavity 13 through the wiring cavity 12 to affect the power supply during glue injection, a sealing plug 4 is installed in the wiring cavity 12, and a wiring hole 41 is formed in the sealing plug 4. The outer diameter of the sealing plug 4 is greater than or equal to the inner diameter of the wiring cavity 12, or the sealing plug 4 is in interference fit with the wiring cavity 12, the inner diameter of the wiring hole 41 is less than or equal to the outer diameter of the power line 23, and the power line 23 is in interference fit with the wiring hole 41.

It can be understood that the sealing plug 4 can be made of silicone or rubber, and the silicone and rubber have elasticity, so that when the size of the sealing plug 4 is larger than that of the routing cavity 12, the sealing plug 4 can be conveniently mounted when having elasticity.

The utility model discloses an in some embodiments, PCB board 2 is cut apart into first cavity and second cavity with cavity 11, and PCB board 2 is equipped with glues hole 21, crosses to glue hole 21 and communicates first cavity and second cavity.

Specifically, the glue flows from the first cavity into the second cavity through the glue through holes 12, and the first cavity and the second cavity are filled with the glue to fix the PCB 2.

It should be noted that the glue passing holes 21 are plural, and the number of the glue passing holes 21 is not a limitation of the present invention.

In some embodiments of the present invention, the outer edge of the window cover plate 3 is provided with a sealing glue groove 33 connected to the inner wall of the corresponding cavity of the base 1 in a sealing manner.

Specifically, in the glue injection process, the glue flows through the glue passing holes 21 on the PCB 2 to fill the gap at the bottom of the PCB 2, so as to avoid the existence of a gap at the bottom of the PCB 2, which results in poor sealing performance of the PCB 2. The outer edge of window apron 3 is equipped with seals gluey groove 33, should seal gluey groove 33 and the inner wall sealing connection of base 1's cavity 11, and after PCB board 2, window apron 3 installation, toward sealing gluey inslot 33 injecting glue for cavity 11 can be sealed.

The utility model discloses an in some embodiments, this water gauge's PCB board seal structure's encapsulating sealing method includes following step:

sequentially mounting the PCB 2 and the window cover plate 3 on the base 1, and injecting glue from a glue injection port 31 of the window cover plate 3;

specifically, since the glue injection port 31 and the glue overflow port 32 are both communicated with the cavity 11, when glue is injected from the glue injection port 31, air in the cavity 11 is exhausted from the glue overflow port 32, and it is ensured that the glue smoothly enters the cavity 11.

Observing the glue overflow port 32 on the window cover plate 3, and stopping glue injection after glue flows out of the glue overflow port 32 and is fully paved to the glue sealing groove 33 on the outer edge of the window cover plate 3;

specifically, when the glue flows out from the glue overflow port 32, it is indicated that the glue fills the whole cavity 11, the PCB 2 is sealed by the glue, the glue is continuously injected, and the glue is fully spread to the glue sealing groove 33 on the outer edge of the window cover plate 3, i.e. the glue seals the connection between the window cover plate 3 and the cavity 11, thereby further improving the sealing performance.

And curing the glue. Specifically, the solidification mode of glue has the multiple, can adopt modes such as ultraviolet ray stoving, perhaps freely air-dries, and the mode of glue solidification does not regard as the utility model discloses a restriction.

The sealing method has simple operation process and reduces the production cost.

According to the utility model discloses a few embodiments, this water gauge's another kind of encapsulating sealing method of PCB board seal structure includes following step:

installing the PCB 2 in the cavity 11 of the base 1, injecting glue, and stopping injecting the glue after the glue is fully spread on the PCB 2; specifically, before the window cover plate 3 is installed, glue is injected into the cavity 11, so that the problem that the glue injection speed is too low due to the fact that the glue injection opening 31 of the window cover plate 3 is too small is solved, and the glue injection speed is improved.

Before the glue is not cured, the window cover plate 3 is arranged on the base 1; specifically, in the process of installing the window cover plate 3, air flows out from the glue injection port 31 and the glue overflow port 32, and when the lower end face of the glue blocking rib plate 34 is abutted to the upper end face of the limiting step face 15 and the upper end face of the glue blocking rib plate 34 is abutted to the limiting buckle 16, the installation of the window cover plate 3 is completed.

Performing secondary glue injection on the glue sealing groove 33 on the outer edge of the window cover plate 3; the glue seals the connection between the window cover plate 3 and the cavity 11, and the sealing performance is further improved.

And curing the glue.

According to the sealing method, the glue injection speed is increased through twice glue injection, the problem of low glue injection speed caused by the fact that the glue injection port 31 is too small is solved, and the working efficiency is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a PCB board seal structure of water gauge which characterized in that includes:

the base (1) is provided with a cavity (11);

the PCB (2), the said PCB board (2) is installed in the said cavity (11);

the window cover plate (3) is arranged at the opening of the cavity (11) in a covering mode, the window cover plate (3) is provided with a glue injection port (31) and a glue overflow port (32), the glue injection port (31) and the glue overflow port (32) are communicated with the cavity (11), and the upper edge of the glue injection port (31) is not lower than the upper edge of the glue overflow port (32).

2. The PCB sealing structure of the water meter according to claim 1, wherein the base (1) is provided with a limiting step surface (15) corresponding to the peripheral wall of the cavity (11), the lower end surface of the window cover plate (3) is provided with an annular glue blocking rib plate (34), and the lower end surface of the glue blocking rib plate (34) is abutted against the limiting step surface (15).

3. The PCB sealing structure of the water meter according to claim 2, wherein a limiting buckle (16) positioned above the limiting step surface (15) is further arranged on the inner wall of the base (1) corresponding to the cavity (11), and when the lower end surface of the glue blocking rib plate (34) is abutted against the limiting step surface (15), the lower end surface of the limiting buckle (16) is abutted against the upper end surface of the glue blocking rib plate (34).

4. The PCB sealing structure of the water meter according to claim 3, wherein an inclined guide surface for facilitating the introduction of the glue blocking rib plate (34) is arranged on one upward side of the limiting buckle (16).

5. The PCB sealing structure of the water meter according to claim 1, characterized in that the base (1) is provided with a connecting column extending into the cavity (11), and the PCB (2) is fixedly connected with the connecting column through a connecting piece.

6. The PCB sealing structure of the water meter according to claim 5, characterized in that the PCB (2) is provided with a positioning hole (22), and the connecting member passes through the positioning hole (22) to be connected with the connecting column.

7. The PCB sealing structure of the water meter according to claim 1, wherein the base (1) is further provided with a battery cavity (13), the battery cavity (13) is located below the cavity (11), one side of the cavity (11) is provided with a wiring cavity (12) communicating the cavity (11) and the battery cavity (13), and a power line (23) connected to the PCB (2) extends into the battery cavity (13) through the wiring cavity (12).

8. The PCB sealing structure of the water meter according to claim 7, wherein the wiring cavity (12) is filled with a sealing plug (4), the sealing plug (4) is provided with a wiring hole (41), and the power cord (23) passes through the wiring hole (41) on the sealing plug (4) and extends into the battery cavity (13).

9. The PCB sealing structure of the water meter according to claim 7, characterized in that the cavity (11) is divided into a first cavity and a second cavity by the PCB (2), the PCB (2) is provided with a glue passing hole (21), and the glue passing hole (21) is communicated with the first cavity and the second cavity.

10. The PCB sealing structure of the water meter according to the claim 1, characterized in that the outer edge of the window cover plate (3) is provided with a sealing glue groove (33) which is connected with the inner wall of the corresponding cavity (11) of the base (1) in a sealing way.