Electromagnetic water meter

Abstract

The utility model belongs to the technical field of fluid measurement, and particularly relates to an electromagnetic water meter. The electromagnetic water meter comprises a shell with a containing cavity, a measuring guide pipe and a display assembly, the measuring guide pipe and the display assembly are contained in the containing cavity, the shell comprises a top shell and a bottom shell which are covered with each other, the containing cavity is defined by the top shell and the bottom shell, and the measuring guide pipe is clamped between the top shell and the bottom shell and arranged in the middle of the containing cavity in a penetrating mode. The inner wall of the top shell is connected with a first buckle structure, the inner wall of the bottom shell is provided with a second buckle structure, the first buckle structure and the second buckle structure are connected in a buckled mode, a magnet yoke is arranged outside the measuring guide pipe in a surrounding mode, the measuring guide pipe, the magnet yoke and the display assembly are connected to form an integrated structure, and the radial size of the integrated structure is matched with the inner size of the shell. The integrated structure and the shell are connected to form an integral structure, and pouring sealant is poured in the measuring guide pipe and the display assembly. The electromagnetic water meter can solve the problem of how to prevent the top shell and the bottom shell of the electromagnetic water meter from being damaged or separated from each other due to improper operation of field installation personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid measurement, and in particular relates to an electromagnetic water meter. Background Art

[0002] Electromagnetic water meter is an instrument that uses the principle of electromagnetic induction to measure the flow rate of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field. The structure of the electromagnetic water meter is mainly composed of a magnetic circuit system, a measuring conduit, electrodes, a housing, a measuring circuit board, etc. The magnetic circuit system is used to generate a uniform DC or AC magnetic field, the measuring conduit is used to allow the conductive liquid to pass through, the electrodes are used to draw out the induced potential signal, the housing is used to isolate the interference of the external magnetic field, and the measuring circuit board is used to process the induced potential signal generated by the flow of the liquid to be measured.

[0003] The shell of an electromagnetic water meter usually includes a top shell and a bottom shell, and a measuring tube is fixed between the top shell and the bottom shell. On-site installers usually hold the shell to screw the measuring tube into other pipes. However, the height of the top shell of the existing electromagnetic water meter is much greater than the height of the bottom shell, and the measuring tube is close to the bottom of the shell and deviates from the middle position in the height direction of the shell. When holding the shell, the on-site installers will hold the top shell with their entire hand for convenience, causing most of the force of the hand to be transmitted to the top shell, which can easily cause damage to the top shell or separation of the top shell from the bottom shell. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an electromagnetic water meter, aiming to solve the problem of how to prevent the top shell and the bottom shell of the electromagnetic water meter from being damaged or separated from each other due to improper operation of on-site installers.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] An electromagnetic water meter is provided, comprising a shell having an accommodating cavity, and a measuring conduit and a display assembly accommodated in the accommodating cavity, the shell comprising a top shell and a bottom shell covering each other, the top shell and the bottom shell enclosing the accommodating cavity, the measuring conduit being clamped between the top shell and the bottom shell, the measuring conduit passing through the middle of the accommodating cavity, the inner wall of the top shell being connected with a first snap-fit ​​structure, the inner wall of the bottom shell being provided with a second snap-fit ​​structure, the first snap-fit ​​structure and the second snap-fit ​​structure being snap-fitted and connected, a magnetic yoke being provided around the outside of the measuring conduit, the measuring conduit, the magnetic yoke and the display assembly being connected to form an integral structure, the radial dimension of the integral structure matching the inner dimension of the shell, the integral structure being connected to the shell to form an integral structure, and the measuring conduit and the display assembly being filled with potting glue.

[0007] In some embodiments, the inner wall of the top shell or the bottom shell is further provided with a snap-fit ​​structure, and the snap-fit ​​structure is snap-fitted with the outer wall of the measuring conduit.

[0008] In some embodiments, the first buckle structure is a buckle head connected to the inner wall of the top shell and extending toward the bottom shell, and the second buckle structure is a buckle boss protruding from the inner wall of the bottom shell, and the buckle head is buckled with the buckle boss.

[0009] In some embodiments, the bottom shell includes a bottom wall and a peripheral wall extending from the periphery of the bottom wall toward the top shell, and the snap-fit ​​structure is a plurality of ribs connected to the bottom wall and extending longitudinally and transversely, and the plurality of ribs abut against different sides of the measuring tube, and the buckle extends into the gap between the ribs and the peripheral wall to limit the buckle.

[0010] In some embodiments, the top of the rib plate extends higher than the edge of the peripheral wall, the top of the rib plate is engaged with the top shell, and the bottom of the rib plate extends into the accommodating cavity to engage with the bottom wall and side walls of the integral structure, so that the integral structure cooperates with the shell to form an integral structure.

[0011] In some embodiments, the edges of the top shell and the bottom shell are both provided with lead sealing portions, and the top shell and the bottom shell are sealed by the lead sealing portions. The end of the peripheral wall close to the top shell is provided with a first annular step portion surrounding the circumference, and when the top shell and the bottom shell are covered, the first annular step portion abuts against the surface of the top shell facing the bottom shell.

[0012] In some embodiments, the inner walls of the top shell and the bottom shell are provided with screw connection seats, the screw connection seats are distributed at the corners of the top shell and the bottom shell, and the top shell and the bottom shell are fixedly connected by the screw connection seats and screws.

[0013] In some embodiments, the end of the peripheral wall close to the top shell is connected to a first surrounding wall, the outer wall of the top shell is connected to a second surrounding wall corresponding to the first surrounding wall, and the first surrounding wall and the second surrounding wall together form a through hole for the measuring tube to pass through.

[0014] In some embodiments, the measuring catheter includes a tube body, a fixed bracket sleeved on the outside of the tube body, a magnetic conductive component installed on the fixed bracket, and at least two induction electrodes arranged on the tube body, the magnetic yoke surrounds the outside of the fixed bracket, the tube body has a cavity for fluid to pass through, the magnetic conductive component is used to generate a magnetic field distributed in the cavity, and the induction electrode is penetrated through the tube wall of the tube body and extends into the cavity.

[0015] In some embodiments, the electromagnetic water meter also includes a display component, which includes a connecting bracket, a circuit board and a display screen. The connecting bracket is arranged on the top of the fixed bracket, and the connecting bracket is snap-connected to the fixed bracket. The circuit board is arranged on the top surface of the connecting bracket, the display screen is arranged on the circuit board and electrically connected to the circuit board, and the sensing electrode is electrically connected to the circuit board through a connecting wire.

[0016] In some embodiments, the connecting bracket includes a first cavity and an opening connected to the first cavity, the opening is used to inject potting glue into the first cavity, the circuit board is accommodated in the first cavity, and a second cavity for accommodating the sensing electrode and the magnetic conductive component is provided on the fixed bracket. A first wire passing hole connected to the first cavity and for the connecting wire to pass through is provided on the surface of the connecting bracket facing the fixed bracket, and a second wire passing hole connected to the second cavity and for the connecting wire to pass through is provided on the surface of the fixed bracket facing the connecting bracket. The yoke avoids the first wire passing hole and the second wire passing hole, and the first wire passing hole is connected to the second wire passing hole so that the potting glue of the first cavity flows to the second cavity through the first wire passing hole and the second wire passing hole, and a sealing member is clamped between the fixed bracket and the connecting bracket at the position corresponding to the first wire passing hole and the second wire passing hole.

[0017] In some embodiments, a support member is provided on a surface of the connecting bracket facing away from the fixing bracket, the display screen is placed on the circuit board in a horizontal direction, and the support member is used to support the circuit board so that there is a gap between the circuit board and the surface of the connecting bracket facing away from the fixing bracket.

[0018] In some embodiments, the fixed bracket includes two mounting plates spaced apart from each other and a partition plate connected between the two mounting plates, the tube body is passed through the two mounting plates, the mounting plates are directly opposite to the connecting bracket, the magnetic conductive component is clamped between the two mounting plates, and the partition plate is covered with a sealing film, and the sealing film, the partition plate and the sealing film together form the second cavity.

[0019] In some embodiments, a sealing film is disposed on each side of the fixing bracket, and the two sealing films and the partition plate together form a sealed second cavity.

[0020] The beneficial effects of the present application are as follows: the measuring catheter of the present application is passed through the middle of the accommodating cavity, so the measuring catheter is located in the middle position of the shell, the height of the top shell is close to the height of the bottom shell, and when the on-site installer holds the shell, the hand will hold the position of both the top shell and the bottom shell, and the top shell and the bottom shell are evenly stressed, thus preventing the top shell or the bottom shell from being damaged or separated from each other due to excessive force; not only that, since the top shell and the bottom shell of the present application are buckled and connected by the first snap structure and the second snap structure, and the measuring catheter, the magnetic yoke and the display assembly are connected to form an integrated structure, the radial dimension of the integrated structure matches the inner dimension of the shell, and the integrated structure is connected to the shell to form an integral structure, and the measuring catheter and the display assembly are filled with potting glue to increase the weight of the integrated structure, so the weight and structural strength of the entire electromagnetic water meter can also be improved; in summary, the present application can improve the overall structural strength of the electromagnetic water meter, and can effectively prevent the top shell and the bottom shell from being separated or damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the electromagnetic water meter provided in the embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the split structure of the electromagnetic water meter provided in the embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of a partial split structure of an electromagnetic water meter provided in one embodiment of the present application;

[0025] Figure 4 It is a partial structural schematic diagram of the electromagnetic water meter provided in the embodiment of the present application;

[0026] Figure 5 yes Figure 4 A schematic diagram of a split structure provided in one embodiment;

[0027] Figure 6 yes Figure 4 A schematic diagram of a split structure provided by another embodiment;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the electromagnetic water meter provided in the embodiment of the present application.

[0029] Among them, the reference numerals in the figure are:

[0030] 10. Shell; 11. Top shell; 111. First surrounding wall; 12. Bottom shell; 121. Bottom wall; 122. Peripheral wall; 1221. First annular step portion; 123. Second surrounding wall; 13. First buckle structure; 14. Second buckle structure; 15. Rib plate; 16. Table cover; 17. Lead seal portion; 18. Screw connection seat; 20. Measuring catheter; 21. Tube body; 22. Fixing bracket; 221. Second cavity; 222. Second wire hole; 223. Mounting plate; 224, partition plate; 225, second annular flange; 226, sealing film; 227, connecting edge; 23, magnetic conductive component; 24, sensing electrode; 30, display component; 31, connecting bracket; 311, first cavity; 312, opening; 313, first wire hole; 314, support member; 315, first annular flange; 316, clamping part; 32, circuit board; 33, display screen; 34, connecting wire; 40, sealing member; 50, battery; 60, yoke. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] See also Figures 1 to 7 The embodiment of the present application provides an electromagnetic water meter, which includes a shell 10 having a receiving cavity, a measuring conduit 20 and a display assembly 30 received in the receiving cavity, the shell 10 includes a top shell 11 and a bottom shell 12 covering each other, the top shell 11 and the bottom shell 12 enclose the receiving cavity, the measuring conduit 20 is sandwiched between the top shell 11 and the bottom shell 12, the two ends of the measuring conduit 20 are exposed on the surface of the shell 10 and are used to be connected to an external pipeline, the measuring conduit 20 is passed through the middle of the receiving cavity, the top shell 11 1 is connected with a first buckle structure 13, and an inner wall of the bottom shell 12 is provided with a second buckle structure 14, the first buckle structure 13 and the second buckle structure 14 are buckled and connected, a yoke 60 is arranged around the outside of the measuring conduit 20, the measuring conduit 20, the yoke 60 and the display assembly 30 are connected to form an integrated structure, the radial dimension of the integrated structure matches the inner dimension of the shell 10, the integrated structure is connected with the shell 10 to form an integral structure, and the measuring conduit 20 and the display assembly 30 are filled with potting glue.

[0036] The measuring conduit 20 of the present application is arranged in the middle of the accommodating cavity, so the measuring conduit 20 is located in the middle of the shell 10, and the height of the top shell 11 is close to the height of the bottom shell 12. When the on-site installer holds the shell 10, the hand will hold the position of the top shell 11 and the position of the bottom shell 12. The top shell 11 and the bottom shell 12 are evenly stressed, avoiding the top shell 11 or the bottom shell 12 being damaged or separated from each other due to excessive stress; in addition, since the top shell 11 and the bottom shell 12 of the present application are connected by the first buckle structure 13 and the second buckle structure 14, The measuring conduit 20, the magnetic yoke 60 and the display assembly 30 are snap-fitted and connected to form an integrated structure. The radial dimension of the integrated structure matches the inner dimension of the shell 10. The integrated structure is connected to the shell 10 to form an integral structure. The measuring conduit 20 and the display assembly 30 are filled with potting glue to increase the weight of the integrated structure. Therefore, the weight and structural strength of the entire electromagnetic water meter can also be improved. In summary, the present application can improve the overall structural strength of the electromagnetic water meter, and can effectively prevent the top shell 11 and the bottom shell 12 from being separated or damaged.

[0037] Moreover, since the overall structural strength of the electromagnetic water meter of the present application is relatively large, the shell 10 can be directly screwed around the axis of the measuring tube 20 to achieve threaded connection between the measuring tube 20 and other pipes without using a wrench, thereby improving assembly efficiency.

[0038] In some embodiments, the inner wall of the top shell 11 or the bottom shell 12 is also provided with a snap-fit ​​structure, which is snap-fitted to the outer wall of the integrated structure. Therefore, the connection strength between the top shell 11 and the bottom shell 12 and the integrated structure is further enhanced, thereby improving the overall structural strength of the electromagnetic water meter, and further preventing the top shell 11 and the bottom shell 12 from separating or being damaged.

[0039] In some embodiments, the first buckle structure 13 is a buckle head connected to the inner wall of the top shell 11 and extending toward the bottom shell 12, and the second buckle structure 14 is a buckle boss convexly provided on the inner wall of the bottom shell 12, and the buckle head is buckled with the buckle boss. In other possible implementations, the first buckle structure 13 is a buckle head connected to the inner wall of the top shell 11 and extending toward the bottom shell 12, and the second buckle structure 14 is a buckle groove opened on the inner wall of the bottom shell 12, and the buckle head extends into the buckle groove to achieve a buckle connection. The present application does not make a sole limitation on the specific structure and connection method of the first buckle structure 13 and the second buckle structure 14.

[0040] In addition, the four inner side walls of the top shell 11 can be provided with a first buckle structure 13, and correspondingly, the four inner side walls of the bottom shell 12 can be provided with a second buckle structure 14, so as to further improve the connection strength between the top shell 11 and the bottom shell 12. In the present application, the length of the first buckle structure 13 can be extended to 9 mm, so that the top shell 11 is less likely to be lifted and separated from the bottom shell 12, thereby enhancing the connection strength between the bottom shell 12 and the top shell 11.

[0041] In the present application, the bottom shell 12 includes a bottom wall 121 and a peripheral wall 122 extending from the periphery of the bottom wall 121 toward the top shell 11. The snap-fit ​​structure is a plurality of ribs 15 connected to the bottom wall 121 and extending longitudinally and transversely. The plurality of ribs 15 can be arranged along the periphery of the peripheral wall 122. The plurality of ribs 15 abut against different sides of the measuring tube 20. The buckle head extends into the gap between the ribs 15 and the peripheral wall 122 to limit the buckle head. If the buckle head is pushed inward, due to the action of the ribs 15, the buckle head is limited by the ribs 15, so it is not easy to deform and disengage, thereby achieving anti-disassembly.

[0042] In some embodiments, the top end of the rib plate 15 extends higher than the edge of the peripheral wall 122, the top end of the rib plate 15 is engaged with the top shell 11, and the bottom end of the rib plate 15 extends into the accommodating cavity to be engaged with the bottom wall and side walls of the integrated structure, so that the integrated structure cooperates with the shell 10 to form an integral structure. Therefore, the rib plate 15 of the present application has multiple functions. First, as a reinforcing rib, it can enhance the structural strength of the bottom shell 12. Second, the top end of the rib plate 15 is engaged with the top shell 11, so that the connection between the bottom shell 12 and the top shell 11 is more stable, and the bottom shell 12 and the top shell 11 are not easy to separate. Third, it is engaged with the bottom wall and side walls of the integrated structure, which plays a limiting role on the integrated structure, and is adapted to the size of the integrated structure without a gap, so that the integrated structure cooperates with the shell 10 to form an integral structure, thereby further improving the overall structural strength of the electromagnetic water meter. In addition, the shape of the rib plate 15 of the present application can be adapted to the outer wall surface of the integrated structure. For example, if the outer wall surface of the integrated structure is an arc-shaped surface, the contact surface between the rib plate 15 and the integrated structure can also be an arc-shaped surface, thereby making the rib plate 15 and the integrated structure fit more closely.

[0043] Furthermore, the edges of the top shell 11 and the bottom shell 12 are both provided with a lead seal portion 17, and the top shell 11 and the bottom shell 12 are lead-sealed by the lead seal portion 17. The end of the peripheral wall 122 close to the top shell 11 is provided with a first annular step portion 1221 that surrounds the top shell 11 in the circumferential direction. When the top shell 11 and the bottom shell 12 are covered, the first annular step portion 1221 abuts against the surface of the top shell 11 facing the bottom shell 12, achieving a similar effect to a lead seal. Therefore, the present application can form a two-layer lead seal structure, thereby further improving the stability of the connection between the top shell 11 and the bottom shell 12. In the present application, the width of the first annular step portion 1221 in the direction perpendicular to the peripheral wall 122 can be increased according to the situation, so that the top shell 11 is not easily lifted open by a flat-blade screwdriver, and the watch case can only be opened by lifting and destroying the entire circle, thereby achieving a similar effect to a lead seal.

[0044] In some embodiments, a second annular step portion surrounding the top shell 11 near the bottom shell 12 may be provided along the circumferential direction, and the second annular step portion abuts against the surface of the peripheral wall 122 facing the top shell 11. By providing the second annular step portion, the connection strength between the top shell 11 and the bottom shell 12 is further enhanced.

[0045] In some embodiments, the inner walls of the top shell 11 and the bottom shell 12 are provided with screw connection seats 18, and the screw connection seats 18 are distributed at the corners of the top shell 11 and the bottom shell 12. The top shell 11 and the bottom shell 12 are fixedly connected by the screw connection seats 18 and screws.

[0046] In some embodiments, the end of the peripheral wall 122 close to the top shell 11 is connected to a first surrounding wall, and the outer wall surface of the top shell 11 is connected to a second surrounding wall corresponding to the first surrounding wall 111, and the first surrounding wall and the second surrounding wall together form a through hole for the measurement conduit 20 to pass through. The first surrounding wall and the second surrounding wall can support the measurement conduit 20, so that the installation of the measurement conduit 20 is more stable.

[0047] In addition, the covering surface of the top shell 11 and the bottom shell 12 passes through the central axis of the measuring tube 20, that is, the covering surface of the top shell 11 and the bottom shell 12 is located at the center of the measuring tube 20, so the volume of the internal cavity of the top shell 11 and the internal cavity of the bottom shell 12 can be reasonably arranged. In addition, the internal cavity of the bottom shell 12 can be used to place the battery 50.

[0048] In some embodiments, the portion of the measuring conduit 20 exposed from the housing 10 may be provided with a threaded section so that the measuring conduit 20 can be threadedly connected to an external pipe, facilitating the installation of the electromagnetic water meter. The inner wall or outer wall of the portion of the measuring conduit 20 exposed from the housing 10 may be provided in a circular shape to facilitate connection with an external circular pipe.

[0049] In some embodiments, the measuring catheter 20 includes a tube body 21, a fixed bracket 22 sleeved on the outside of the tube body 21, a magnetic conductive component 23 installed on the fixed bracket 22, and at least two sensing electrodes 24 arranged on the tube body 21, the yoke 60 surrounds the outside of the fixed bracket 22, the tube body 21 has a cavity for fluid to pass through, the magnetic conductive component 23 is used to generate a magnetic field distributed in the cavity, and the sensing electrode 24 is penetrated through the tube wall of the tube body 21 and extends into the cavity. In the present application, the snap-fit ​​structure can be snapped with the outer wall of the fixed bracket 22.

[0050] Furthermore, the electromagnetic water meter also includes a display assembly 30, which includes a connecting bracket 31, a circuit board 32 and a display screen 33. The connecting bracket 31 is arranged on the top of the fixed bracket 22, the connecting bracket 31 is snap-connected with the fixed bracket 22, the circuit board 32 is arranged on the top surface of the connecting bracket 31, the display screen 33 is arranged on the circuit board 32 and is electrically connected to the circuit board 32, and the sensing electrode 24 is electrically connected to the circuit board 32 through the connecting wire 34. In this way, the measuring catheter 20 and the display assembly 30 are connected to form an integrated structure, at which time the length of the connecting wire 34 can be shortened, external interference can be prevented, the production cost is lowest, and the product consistency is good and the stability is high, thereby improving the measurement accuracy of the electromagnetic water meter as a whole.

[0051] Specifically, the edge of the connecting bracket 31 is provided with a clamping portion 316, and the edge of the fixing bracket 22 is provided with a connecting edge 227, and the clamping portion 316 is clamped with the connecting edge 227, thereby realizing the snap connection between the connecting bracket 31 and the fixing bracket 22. In addition, the connecting line 34 in the present application can be a single branch line or an FPC line.

[0052] In the present application, the two sensing electrodes 24 are facing each other, the magnetic conductive component 23 is used to generate a magnetic field distributed in the cavity of the measuring catheter 20, the two sensing electrodes 24 are arranged on the wall of the measuring catheter 20 and extend into the cavity, and the connection line between the two sensing electrodes 24 is perpendicular to the direction of the magnetic field generated by the magnetic conductive component 23, so the two sensing electrodes 24 can sense the fluid cutting the alternating magnetic field and lead out the induced electromotive force, and transmit it to the circuit board 32 through the connecting line 34, the circuit board 32 is a main board integrating measurement and communication functions, the circuit board 32 is used to process the analog signal collected by the sensing electrode 24 into a digital signal, and then into a flow rate and flow velocity signal, and after processing, the detection result can be displayed on the display screen 33, such as the instantaneous flow rate of the fluid, the cumulative flow rate or the flow velocity of the fluid. In the present application, the display screen 33 is a liquid crystal screen.

[0053] The top shell 11 is also provided with an exposure window for exposing the display screen 33, and the exposure window is directly opposite to the display screen 33. A cover 16 is also connected to the top of the top shell 11, and the display screen 33 can be exposed by opening the cover 16, so that the operator can open the cover 16 to read the data displayed on the display screen 33.

[0054] In some embodiments, the connecting bracket 31 includes a first cavity 311 and an opening 312 connected to the first cavity 311, the opening 312 is used to inject potting glue into the first cavity 311, the circuit board 32 is accommodated in the first cavity 311, the fixing bracket 22 is provided with a second cavity 221 for accommodating the sensing electrode 24 and the magnetic conductive component 23, and the surface of the connecting bracket 31 facing the fixing bracket 22 is provided with a first wire hole 313 connected to the first cavity 311 and for the connecting wire 34 to pass through, and the fixing bracket 22 faces A second wire hole 222 is opened on the surface of the connecting bracket 31 to connect to the second cavity 221 and for the connecting wire 34 to pass through. The yoke 60 avoids the first wire hole 313 and the second wire hole 222. The first wire hole 313 is connected to the second wire hole 222 so that the potting glue in the first cavity 311 flows to the second cavity 221 through the first wire hole 313 and the second wire hole 222. A sealing member 40 is clamped between the fixing bracket 22 and the connecting bracket 31 at positions corresponding to the first wire hole 313 and the second wire hole 222.

[0055] When the potting glue is poured into the first cavity 311 from the opening 312, the potting glue is in liquid state. After the potting glue fills the first cavity 311 and the second cavity 221, the potting glue contacts the inner walls of the first cavity 311 and the second cavity 221 and the components inside the first cavity 311 and the second cavity 221. After the potting glue is completely cured, the potting glue can completely seal the components inside the first cavity 311 and the second cavity 221, effectively preventing water vapor from penetrating and causing short circuit damage, improving the safety and reliability of the measuring catheter 20 and the display assembly 30, and achieving IP68 waterproofing for a long time.

[0056] It can be understood that in the present application, the measuring tube 20, the magnetic yoke 60 and the display assembly 30 are connected to form an integrated structure, and the potting surface of the measuring tube 20 and the display assembly 30 is located in the same direction of the measuring tube 20 and the display assembly 30, so only one potting is required to avoid secondary potting, which can facilitate automated production, shorten the potting curing time, and improve production efficiency. The measuring tube 20, the magnetic yoke 60 and the display assembly 30 are connected to form an integrated structure, which can also reduce the volume of the product and is conducive to miniaturization. It should be noted that if the potting port is set on the side of the measuring tube 20 and the display assembly 30, the potting surface of the display assembly 30 is set on the side, and a protective surface needs to be added on the display assembly 30 to form a complete space for the side opening. Since the potting glue will tear the LCD screen after curing, in order to avoid the display screen 33 from being filled with glue, some protective accessories need to be added, which makes the production quality difficult to control, thereby increasing the production cost.

[0057] In this application, the potting glue is epoxy resin, which is cured after being poured in, can achieve a sealing function, and can achieve IP68 waterproofing for a long time. The potting glue can also be other components, and this application does not limit the specific components of the potting glue.

[0058] Specifically, a first annular flange 315 is provided on the surface of the connecting bracket 31 facing the fixed bracket 22, and the first annular flange 315 is arranged to form a first wire passing hole 313. A second annular flange 225 is provided on the surface of the fixed bracket 22 facing the connecting bracket 31, and the second annular flange 225 is arranged to form a second wire passing hole 222. The second annular flange 225 extends into the first wire passing hole 313. The sealing member 40 is a sealing ring which is sleeved on the outside of the first annular flange 315, thereby enhancing the sealing performance and preventing the potting compound from leaking out.

[0059] In some embodiments, a support member 314 is provided on the surface of the connecting bracket 31 facing away from the fixing bracket 22, and the display screen 33 is placed on the circuit board 32 in a horizontal direction. The support member 314 is used to support the circuit board 32 so that there is a gap between the circuit board 32 and the surface of the connecting bracket 31 facing away from the fixing bracket 22, which can raise the height of the display screen 33. Moreover, since the display screen 33 is placed horizontally, it is easy to control the liquid level of the potting glue in a liquid state when pouring the potting glue, so that the liquid level of the potting glue is higher than the top surface of the circuit board 32, but does not submerge the display screen 33, thereby avoiding the potting glue from cracking the LCD screen after curing, avoiding the need to set protective accessories, and making the production quality easy to control and reducing the production cost.

[0060] In some embodiments, the fixed bracket 22 includes two mounting plates 223 spaced apart from each other and a partition plate 224 connected between the two mounting plates 223. The tube body 21 is inserted between the two mounting plates 223. The mounting plates 223 are directly opposite to the connecting bracket 31. The magnetic conductive component 23 is clamped between the two mounting plates 223. A sealing film 226 is provided on the partition plate 224. The partition plate 224 and the sealing film 226 are enclosed to form the second cavity 221, thereby ensuring the sealing of the second cavity 221. Specifically, the second wire hole 222 is opened on the mounting plate 223 near the connecting bracket 31. In the present application, the sealing film 226 is a plastic film, which can be formed by a thin film heating method to complete the sealing, which can effectively reduce costs, improve production efficiency, and realize automated production.

[0061] In some embodiments, a sealing film 226 is disposed on each side of the fixing bracket 22 , and the two sealing films 226 and the partition plate 224 together form a closed second cavity 221 .

[0062] In some embodiments, the magnetic yoke 60 is formed by two semi-annular structures to form an annular structure. By setting the magnetic yoke 60, the magnetic field generated by the magnetic conductive component 23 will not leak, and the interference of the external magnetic field can be prevented from affecting the measurement results, which helps to improve the measurement accuracy.

[0063] In summary, the measuring tube 20 of the present application is passed through the middle of the accommodating cavity, so the measuring tube 20 is located in the middle of the shell 10, and the height of the top shell 11 is close to the height of the bottom shell 12. When the on-site installer holds the shell 10, the hand will hold the position of the top shell 11 and the position of the bottom shell 12. The top shell 11 and the bottom shell 12 are evenly stressed, avoiding the top shell 11 or the bottom shell 12 from being damaged or separated from each other due to excessive stress; in addition, since the top shell 11 and the bottom shell 12 of the present application are connected by the first snap-fit ​​structure 13 and the second snap-fit ​​structure 14 are snap-fittedly connected, and the measuring conduit 20, the magnetic yoke 60 and the display assembly 30 are connected to form an integrated structure, the radial dimension of the integrated structure matches the inner dimension of the shell 10, and the integrated structure is connected to the shell 10 to form an integral structure, and the measuring conduit 20 and the display assembly 30 are filled with potting glue to increase the weight of the integrated structure, so the weight and structural strength of the entire electromagnetic water meter can also be improved; in summary, the present application can improve the overall structural strength of the electromagnetic water meter, and can effectively prevent the top shell 11 and the bottom shell 12 from being separated or damaged.

[0064] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An electromagnetic water meter, characterized in that: The invention comprises a housing (10) having a housing cavity, and a measuring conduit (20) and a display assembly (30) accommodated in the housing cavity, wherein the housing (10) comprises a top housing (11) and a bottom housing (12) which cover each other, the top housing (11) and the bottom housing (12) enclose the housing cavity, the measuring conduit (20) is sandwiched between the top housing (11) and the bottom housing (12), the measuring conduit (20) is passed through the middle of the housing cavity, the inner wall of the top housing (11) is connected to a first buckle structure (13), and the inner wall of the bottom housing (12) is connected to a first buckle structure (13). The wall is provided with a second snap-fit ​​structure (14), the first snap-fit ​​structure (13) and the second snap-fit ​​structure (14) are snap-fitted and connected, a magnetic yoke (60) is arranged around the outside of the measuring tube (20), the measuring tube (20), the magnetic yoke (60) and the display component (30) are connected to form an integrated structure, the radial dimension of the integrated structure matches the inner dimension of the shell (10), the integrated structure is connected to the shell (10) to form an integral structure, and the measuring tube (20) and the display component (30) are filled with potting glue.

2. The electromagnetic water meter according to claim 1, characterized in that: The inner wall of the top shell (11) or the bottom shell (12) is also provided with a snap-fit ​​structure, and the snap-fit ​​structure is snap-fitted with the outer wall of the integrated structure.

3. The electromagnetic water meter according to claim 2, characterized in that: The first buckle structure (13) is a buckle head connected to the inner wall of the top shell (11) and extending toward the bottom shell (12), and the second buckle structure (14) is a buckle boss protruding from the inner wall of the bottom shell (12), and the buckle head is buckled with the buckle boss.

4. The electromagnetic water meter according to claim 3, characterized in that: The bottom shell (12) comprises a bottom wall (121) and a peripheral wall (122) extending from the periphery of the bottom wall (121) toward the top shell (11); the snap-fit ​​structure is a plurality of ribs (15) extending in the longitudinal and transverse directions; the buckle extends into a gap between the ribs (15) and the peripheral wall (122) to limit the buckle.

5. The electromagnetic water meter according to claim 4, characterized in that: The top end of the rib plate (15) extends higher than the edge of the peripheral wall (122), the top end of the rib plate (15) is engaged with the top shell (11), and the bottom end of the rib plate (15) extends into the accommodating cavity to be engaged with the bottom wall and side walls of the integral structure, so that the integral structure cooperates with the shell (10) to form an integral structure.

6. The electromagnetic water meter according to claim 4, characterized in that: The edges of the top shell (11) and the bottom shell (12) are both provided with a lead sealing portion (17), and the top shell (11) and the bottom shell (12) are lead sealed by the lead sealing portion (17); the end of the peripheral wall (122) close to the top shell (11) is provided with a first annular step portion (1221) surrounding along the circumferential direction; when the top shell (11) and the bottom shell (12) are covered, the first annular step portion (1221) abuts against the surface of the top shell (11) facing the bottom shell (12).

7. The electromagnetic water meter according to claim 4, characterized in that: The inner walls of the top shell (11) and the bottom shell (12) are provided with screw connection seats (18), and the screw connection seats (18) are distributed at the corners of the top shell (11) and the bottom shell (12). The top shell (11) and the bottom shell (12) are fixedly connected by the screw connection seats (18) and screws.

8. The electromagnetic water meter according to claim 4, characterized in that: The end of the peripheral wall (122) close to the top shell (11) is connected to a first peripheral wall, and the outer wall surface of the top shell (11) is connected to a second peripheral wall corresponding to the first peripheral wall (111), and the first peripheral wall and the second peripheral wall together form a through hole for the measuring conduit (20) to pass through.

9. The electromagnetic water meter according to any one of claims 1 to 8, characterized in that: The measuring catheter (20) comprises a tube body (21), a fixed bracket (22) sleeved on the outside of the tube body (21), a magnetic conductive component (23) mounted on the fixed bracket (22), and at least two induction electrodes (24) arranged on the tube body (21); the magnetic yoke (60) surrounds the outside of the fixed bracket (22); the tube body (21) has a cavity for fluid to pass through; the magnetic conductive component (23) is used to generate a magnetic field distributed in the cavity; and the induction electrode (24) is penetrated through the tube wall of the tube body (21) and extends into the cavity.

10. The electromagnetic water meter according to claim 9, characterized in that: The electromagnetic water meter further comprises a display component (30), the display component (30) comprising a connecting bracket (31), a circuit board (32) and a display screen (33), the connecting bracket (31) being arranged on the top of the fixing bracket (22), the connecting bracket (31) being snap-connected to the fixing bracket (22), the circuit board (32) being arranged on the top surface of the connecting bracket (31), the display screen (33) being arranged on the circuit board (32) and being electrically connected to the circuit board (32), and the sensing electrode (24) being electrically connected to the circuit board (32) via a connecting line (34).

11. The electromagnetic water meter according to claim 10, characterized in that: The connecting bracket (31) comprises a first cavity (311) and an opening (312) communicating with the first cavity (311); the opening (312) is used to inject potting glue into the first cavity (311); the circuit board (32) is accommodated in the first cavity (311); the fixing bracket (22) is provided with a second cavity (221) for accommodating the sensing electrode (24) and the magnetic conductive component (23); a first wire hole (313) communicating with the first cavity (311) and allowing the connecting wire (34) to pass through is provided on a surface of the connecting bracket (31) facing the fixing bracket (22); the fixing bracket (22) is provided with a first wire hole (313) communicating with the first cavity (311) and allowing the connecting wire (34) to pass through; A second wire hole (222) communicating with the second cavity (221) and allowing the connecting wire (34) to pass through is provided on the surface of the frame (31); the magnetic yoke (60) avoids the first wire hole (313) and the second wire hole (222); the first wire hole (313) is connected to the second wire hole (222) so that the potting glue of the first cavity (311) flows to the second cavity (221) through the first wire hole (313) and the second wire hole (222); and a sealing member (40) is sandwiched between the fixed bracket (22) and the connecting bracket (31) at positions corresponding to the first wire hole (313) and the second wire hole (222).

12. The electromagnetic water meter according to claim 11, characterized in that: A support member (314) is provided on a surface of the connecting bracket (31) facing away from the fixing bracket (22); the display screen (33) is placed on the circuit board (32) in a horizontal direction; and the support member (314) is used to support the circuit board (32) so that a gap exists between the circuit board (32) and a surface of the connecting bracket (31) facing away from the fixing bracket (22).

13. The electromagnetic water meter according to claim 11, characterized in that: The fixed bracket (22) comprises two mounting plates (223) spaced apart from each other and a partition plate (224) connected between the two mounting plates (223); the tube body (21) is inserted between the two mounting plates (223); the mounting plates (223) are directly opposite to the connecting bracket (31); the magnetic conductive component (23) is clamped between the two mounting plates (223); a sealing film (226) is provided on the partition plate (224); the partition plate (224) and the sealing film (226) together form a sealed second cavity (221).

14. The electromagnetic water meter according to claim 13, characterized in that: A sealing film (226) is provided on each side of the fixed bracket (22), and the two sealing films (226) and the partition plate (224) together form a sealed second cavity (221).

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