Electromagnetic flowmeter

Abstract

The utility model belongs to the technical field of fluid measurement, and particularly relates to an electromagnetic flowmeter. The electromagnetic flowmeter comprises a shell, a display assembly, a measuring guide pipe, a plurality of batteries and a magnet yoke, the display assembly, the measuring guide pipe, the batteries and the magnet yoke are contained in the shell, the display assembly comprises a measuring circuit board, the measuring circuit board is electrically connected with the measuring guide pipe through a connecting wire, and the measuring circuit board, the magnet yoke, the measuring guide pipe and the batteries are sequentially arranged. The measuring circuit board, the magnet yoke and the measuring conduit are connected to form an integrated structure. According to the electromagnetic flowmeter, the problems of how to enhance the signal anti-interference capability of the electromagnetic flowmeter, how to reduce the production cost and how to improve the automatic production capacity can be solved.

Description

Technical Field

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

[0002] Electromagnetic flowmeter 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 flowmeter is mainly composed of a magnetic circuit system, a measuring conduit, electrodes, a housing, and a display component. 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 display component is used to process the induced potential signal generated by the flow of the liquid to be measured.

[0003] An electromagnetic flowmeter generally includes a housing, which contains a display assembly, a battery, and a measuring conduit. The display assembly includes a measuring circuit board. Existing electromagnetic flowmeters generally place the measuring conduit, the battery, and the measuring circuit board in sequence, with the battery located between the measuring conduit and the measuring circuit board. This results in a longer connecting line between the measuring circuit board and the measuring conduit, poor signal anti-interference capability, and an increased size of the electromagnetic flowmeter. Utility Model Content

[0004] The purpose of the embodiment of the present application is to provide an electromagnetic flowmeter, aiming to solve the problem of how to enhance the signal anti-interference ability of the electromagnetic flowmeter and how to reduce production costs and improve automated production capacity. To achieve the above purpose, the technical solution adopted by the present application is:

[0005] An electromagnetic flowmeter is provided, comprising a shell and a display assembly, a measuring tube, a plurality of batteries and a magnetic yoke housed inside the shell, wherein the display assembly comprises a measuring circuit board, the measuring circuit board is electrically connected to the measuring tube via a connecting line, the measuring circuit board, the magnetic yoke, the measuring tube and the battery are arranged in sequence, and the measuring circuit board, the magnetic yoke and the measuring tube are connected to form an integrated structure.

[0006] In some embodiments, the display component includes a first potting cavity for pouring potting glue, and the measuring tube includes a second potting cavity for pouring potting glue, the first potting cavity is connected to the second potting cavity, and the opening direction of the first potting cavity is in the same direction as the opening direction of the second potting cavity.

[0007] In some embodiments, the display assembly and the measuring catheter are snap-connected via a snap-on structure; or, the display assembly and the measuring catheter are connected via a guide groove; or, the display assembly and the measuring catheter are fixedly connected via screws.

[0008] In some embodiments, the display component includes a connecting bracket, the connecting bracket is provided with the first potting cavity, the measuring circuit board is accommodated in the first potting cavity, a sealing ring is arranged between the connecting bracket and the measuring tube, and the sealing ring is arranged at the connection point between the first potting cavity and the second potting cavity.

[0009] 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 fixed bracket is provided with the second potting cavity, the induction electrode and the magnetic conductive component are accommodated in the second potting cavity, the surface of the connecting bracket facing the fixed bracket is provided with a first wire passing hole connected to the first potting cavity and for the connecting wire to pass through, the surface of the fixed bracket facing the connecting bracket is provided with a second wire passing hole connected to the second potting cavity and for the connecting wire to pass through, the magnetic yoke avoids the first wire passing hole and the second wire passing hole, the first wire passing hole is connected with the second wire passing hole, so that the potting glue in the first potting cavity flows to the second potting cavity through the first wire passing hole and the second wire passing hole.

[0010] In some embodiments, a support member is provided on a surface of the connecting bracket facing away from the fixing bracket, a display screen is provided on the measuring circuit board, 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.

[0011] 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, a sealing film is covered on the partition plate, one sealing film is provided on each side of the fixed bracket, and the two sealing films and the partition plate together form a closed second potting cavity.

[0012] In some embodiments, the shell includes a top shell and a bottom shell covering each other, the top shell and the measuring tube together form a first cavity, the bottom shell and the measuring tube together form a second cavity, the display component is accommodated in the first cavity, the battery is accommodated in the second cavity, and the top shell and the bottom shell are detachably connected.

[0013] In some embodiments, the inner wall of the bottom shell is provided with a limiting structure for limiting the position of the battery.

[0014] In some embodiments, the limiting structure is a limiting rib, the limiting rib is protruding from the inner wall of the bottom shell, and the surface of the limiting rib facing the second cavity is clamped with the outer peripheral surface of the battery.

[0015] In some embodiments, the battery is a cylindrical structure, and the surface of the limiting rib facing the second cavity is an arc-shaped surface, and the arc-shaped surface is in contact with the cylindrical surface of the battery.

[0016] 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, the bottom wall and the peripheral wall together form the second cavity, the limiting rib is protruded on the bottom wall, and the surface of the limiting rib facing the second cavity is clamped with the side wall of the battery.

[0017] In some embodiments, the number of the batteries is four, and the four batteries are stacked to form a two-layer structure; or, the number of the batteries is two, and the number of the batteries is replaceable.

[0018] In some embodiments, the covering surface of the top shell and the bottom shell passes through the central axis of the measuring tube.

[0019] The beneficial effects of the present application are as follows: the electromagnetic flowmeter of the present application, by connecting the measuring circuit board and the measuring conduit to form an integrated structure, can shorten the length of the connecting line between the measuring circuit board and the measuring conduit, thereby enhancing the signal anti-interference capability of the electromagnetic flowmeter, and can reduce production costs, reduce product size, and improve automated production capabilities, so that the product has good consistency and high stability, thereby improving the measurement accuracy of the electromagnetic water meter as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a schematic diagram of the overall structure of the electromagnetic flowmeter provided in the embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the split structure of an electromagnetic flowmeter provided in one embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the split structure of an electromagnetic flowmeter provided in another embodiment of the present application;

[0024] Figure 4is a schematic diagram of the cross-sectional structure of the electromagnetic flowmeter provided in an embodiment of the present application;

[0025] Figure 5 It is a partial structural schematic diagram of the electromagnetic water meter provided in the embodiment of the present application;

[0026] Figure 6 yes Figure 5 A schematic diagram of a split structure provided in one embodiment;

[0027] Figure 7 yes Figure 5 A schematic diagram of a split structure provided by another embodiment;

[0028] Figure 8 It is a schematic diagram of the partial cross-section 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; 12. Bottom shell; 121. Bottom wall; 122. Peripheral wall; 13. Limiting ribs; 16. Table cover; 20. Measuring catheter; 21. Tube body; 22. Fixing bracket; 222. Second wire hole; 223. Mounting plate; 224. Partition plate; 225. Second annular flange; 226. Sealing film; 23. Magnetic conductive component; 24. Induction electrode; 30. Display component; 31. Measuring circuit board; 313. First wire hole; 314. Support member; 315. First annular flange; 32. Connecting bracket; 33. Display screen; 40. Battery; 50. Connecting wire; 60. Buckle structure; 70. Sealing ring; 80. Yoke; 100. First cavity; 200. Second cavity; 300. First potting cavity; 400. First potting cavity. 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 8 An embodiment of the present application provides an electromagnetic flowmeter, which includes a shell 10 and a display component 30, a measuring tube 20, a plurality of batteries 40 and a magnetic yoke 80 housed inside the shell 10. The display component 30 includes a measuring circuit board 31, and the measuring circuit board 31 is electrically connected to the measuring tube 20 through a connecting line 50. The measuring circuit board 31, the magnetic yoke 80, the measuring tube 20 and the battery 40 are arranged in sequence, and the measuring circuit board 31, the magnetic yoke 80 and the measuring tube 20 are connected to form an integrated structure.

[0036] The electromagnetic flowmeter of the present application connects the measuring circuit board 31, the magnetic yoke 80 and the measuring conduit 20 to form an integrated structure. At this time, the length of the connecting line 50 between the measuring circuit board 31 and the measuring conduit 20 can be shortened, thereby enhancing the signal anti-interference capability of the electromagnetic flowmeter, and reducing production costs, reducing product size, and improving automated production capabilities, so that the product has good consistency and high stability, thereby improving the overall measurement accuracy of the electromagnetic water meter.

[0037] By providing the magnetic yoke 80 , the magnetic field generated by the magnetic conductive component 23 in the measuring tube 20 will not leak, and the interference of the external magnetic field to affect the measurement result can be prevented, which helps to improve the measurement accuracy.

[0038] It should be noted that the electromagnetic flowmeter of the present application can be an electromagnetic water meter, which is a metering instrument specially designed for the actual requirements of water supply and water use enterprises. It can optimize water supply and water use and ensure accurate water trade measurement and settlement. Of course, the electromagnetic flowmeter can also be other detection elements for detecting liquid flow.

[0039] Preferably, the display component 30 includes a first potting cavity 300 for pouring potting glue, the measuring catheter 20 includes a second potting cavity 400 for pouring potting glue, the first potting cavity 300 is connected to the second potting cavity 400, and the opening direction of the first potting cavity 300 and the opening direction of the second potting cavity 400 are in the same direction.

[0040] When the potting glue is poured into the first potting cavity 300, the potting glue is in liquid state. After the potting glue fills the first potting cavity 300 and the second potting cavity 400, the potting glue contacts the inner walls of the first potting cavity 300 and the second potting cavity 400 and the components inside the first potting cavity 300 and the second potting cavity 400. After the potting glue is completely cured, the potting glue can completely seal the components inside the first potting cavity 300 and the second potting cavity 400, 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.

[0041] It can be understood that in the present application, the measuring catheter 20 and the display component 30 are connected to form an integrated structure, and the opening direction of the first potting cavity 300 is in the same direction as the opening direction of the second potting cavity 400, that is, the potting cover of the measuring catheter 20 and the display component 30 is located in the same direction of the measuring catheter 20 and the display component 30, so only one potting is required, avoiding secondary potting, facilitating automated production, shortening the potting curing time, and improving production efficiency. It should be noted that if the potting port is set on the side of the measuring catheter 20 and the display component 30, the potting cover of the display component 30 is set on the side, and a protective surface needs to be added on the display component 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.

[0042] 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.

[0043] In some embodiments, the display component 30 and the measuring catheter 20 are snap-connected via a snap-on structure 60. The display component 30 and the measuring catheter 20 can be directly snapped together. The display component 30 and the measuring catheter 20 can also be connected via a guide groove. The display component 30 can be pushed horizontally along the guide groove to connect with the measuring catheter 20. The display component 30 and the measuring catheter 20 can also be fixedly connected via screws. The present application does not make a sole limitation on the connection method between the display component 30 and the measuring catheter 20.

[0044] In some embodiments, the display component 30 includes a connecting bracket 32, the connecting bracket 32 ​​is provided with a first potting cavity 300, the measuring circuit board 31 is accommodated in the first potting cavity 300, and a sealing ring 70 is arranged between the connecting bracket 32 ​​and the measuring catheter 20. The sealing ring 70 is arranged at the connection point between the first potting cavity 300 and the second potting cavity 400. By setting the sealing ring 70, the sealing performance can be enhanced to prevent the potting glue from leaking, and the connection between the display component 30 and the measuring catheter 20 can also be made more stable.

[0045] 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 80 surrounds the outside of the fixed bracket 22. The fixed bracket 22 is provided with a second potting cavity 400. The sensing electrode 24 and the magnetic conductive component 23 are accommodated in the second potting cavity 400. The surface of the connecting bracket 32 ​​facing the fixed bracket 22 is provided with a first wire hole 313 connected to the first potting cavity 300 and for the connecting wire 50 to pass through. The surface of the fixed bracket 22 facing the connecting bracket 32 ​​is provided with a second wire hole 222 connected to the second potting cavity 400 and for the connecting wire 50 to pass through. The yoke 80 avoids the first wire hole 313 and the second wire hole 222. The first wire hole 313 is connected with the second wire hole 222, so that the potting glue in the first potting cavity 300 flows to the second potting cavity 400 through the first wire hole 313 and the second wire hole 222. In addition, the connection line 50 in the present application can be a single branch line or an FPC line.

[0046] 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. The induction electrode 24 is disposed through the tube wall of the tube body 21 and extends into the cavity.

[0047] In some embodiments, a support member 314 is provided on the surface of the connecting bracket 32 ​​facing away from the fixing bracket 22, and a display screen 33 is provided on the measuring circuit board 31. The display screen 33 is placed on the measuring circuit board 31 in a horizontal direction. The support member 314 is used to support the measuring circuit board 31 so that there is a gap between the measuring circuit board 31 and the surface of the connecting bracket 32 ​​facing away from the fixing bracket 22. The support member 314 can raise the height of the display screen 33. 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, 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.

[0048] 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 measuring circuit board 31 through the connecting line 50. The measuring circuit board 31 is a main board integrating measurement and communication functions. The measuring circuit board 31 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. After processing, the detection result can be displayed on the display screen 33, such as the instantaneous flow rate, cumulative flow rate or flow velocity of the fluid. In the present application, the display screen 33 is a liquid crystal screen.

[0049] 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.

[0050] Specifically, a first annular flange 315 is provided on the surface of the connecting bracket 32 ​​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 32, 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, and the sealing ring 70 is sleeved on the outside of the first annular flange 315.

[0051] In the present application, 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 plate 223 is directly opposite to the connecting bracket 32. The magnetic conductive component 23 is clamped between the two mounting plates 223. The partition plate 224 is covered with a sealing film 226. A sealing film 226 is provided on each side of the fixed bracket 22. The two sealing films 226 and the partition plate 224 are enclosed to form a closed second potting cavity 400, thereby ensuring the sealing of the second potting cavity 400. Specifically, the second wire hole 222 is opened on the mounting plate 223 near the connecting bracket 32. 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.

[0052] In some embodiments, the housing 10 includes a top shell 11 and a bottom shell 12 that cover each other, the top shell 11 and the measuring conduit 20 together form a first cavity 100, the bottom shell 12 and the measuring conduit 20 together form a second cavity 200, the display assembly 30 is accommodated in the first cavity 100, the battery 40 is accommodated in the second cavity 200, and the top shell 11 and the bottom shell 12 are detachably connected. By arranging the battery 40 in an independent cavity, isolating it from other components such as the display assembly 30, it will not affect other components such as the display assembly 30. When replacing the battery 40, only the bottom shell 12 needs to be disassembled and replaced with a bottom shell 12 of different sizes as needed, so that the battery 40 can be quickly replaced, and different numbers of batteries 40 can be configured. The present application reduces the difficulty of replacing the battery 40 through modular design, which is conducive to reducing the replacement cost of the battery 40 and enhancing the flexibility and scalability of the electromagnetic flowmeter.

[0053] In some embodiments, the inner wall of the bottom shell 12 is provided with a limiting structure for limiting the battery 40 . The limiting structure can fix the installation position of the battery 40 , thereby making the working state of the battery 40 more stable.

[0054] Specifically, the limiting structure is a limiting rib 13, which is protruded from the inner wall of the bottom shell 12. The limiting rib 13 can be protruded from the bottom wall 121 of the bottom shell 12, or can be protruded from the side wall of the bottom shell 12, which is not limited here.

[0055] Furthermore, the surface of the limiting rib 13 facing the second cavity 200 is clamped with the outer peripheral surface of the battery 40, and the limiting effect of the limiting structure on the battery 40 can be improved by the cooperation between the surface of the limiting rib 13 and the outer peripheral surface of the battery 40. It can be understood that in other possible embodiments, the limiting structure can also be a limiting block or a limiting column, etc., and the battery 40 can also be limited by a plurality of limiting blocks or limiting columns respectively abutting against each side wall of the battery 40. The specific structure and limiting method of the limiting structure are not limited exclusively in this application.

[0056] In some embodiments, the battery 40 is a cylindrical structure, and the surface of the limiting rib 13 facing the second cavity 200 is an arc-shaped surface, which contacts the cylindrical surface of the battery 40. The adaptation of the arc-shaped surface of the limiting rib 13 to the cylindrical surface of the battery 40 increases the contact area between the arc-shaped surface of the limiting rib 13 and the cylindrical surface of the battery 40, thereby further enhancing the limiting effect of the limiting rib 13 on the battery 40.

[0057] It is understandable that in other possible implementations, the battery 40 may also be a square columnar structure or a conical columnar structure, etc. The present application does not limit the specific shape of the battery 40.

[0058] In some embodiments, 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 bottom wall 121 and the peripheral wall 122 together form a second cavity 200. The limiting rib 13 is protruded from the bottom wall 121. The surface of the limiting rib 13 facing the second cavity 200 is clamped with the side wall of the battery 40. Since the two ends of the battery 40 are generally the two connection ends of the battery 40, the side wall of the battery 40 is clamped with the limiting rib 13, so that the connection ends at both ends of the battery 40 can be exposed, thereby avoiding affecting the electrical connection between the battery 40 and external components.

[0059] like Figure 2 and Figure 4 As shown, in the present application, the number of batteries 40 is four, and the four batteries 40 are stacked to form a two-layer structure, and each layer is provided with two batteries 40. It can be understood that when the battery 40 is a cylindrical structure, each battery 40 can be stacked flat, at which time the cylindrical surfaces of each battery 40 are tangent, and the limiting ribs 13 clamp and limit the two batteries 40 at the bottom layer, so that the multi-layer structure of the battery 40 can be made more stable.

[0060] Of course, in other possible implementations, the number of batteries 40 may also be two, six, eight or more. The present application does not impose a single limit on the number of batteries 40, and the number of batteries 40 may be flexibly changed according to actual conditions. Figure 3 In the illustrated embodiment, the number of batteries 40 may be two.

[0061] It is understandable that when the number of batteries 40 needs to be changed, the bottom shell 12 can be replaced with a bottom shell 12 with a larger cavity depth, so that more batteries 40 can be accommodated.

[0062] In some embodiments, 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 first cavity 100 and the second cavity 200 can be reasonably arranged to avoid the accommodating space for the battery 40 being too small to accommodate enough batteries 40.

[0063] To sum up, the electromagnetic flowmeter of the present application forms an integrated structure by connecting the measuring circuit board 31 and the measuring conduit 20. At this time, the length of the connecting line 50 between the measuring circuit board 31 and the measuring conduit 20 can be shortened, thereby enhancing the signal anti-interference ability of the electromagnetic flowmeter, and reducing production costs, reducing product size, and improving automated production capabilities, so that the product has good consistency and high stability, thereby improving the measurement accuracy of the electromagnetic water meter as a whole.

[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 flowmeter, characterized in that: The invention comprises a housing (10), a display assembly (30) accommodated inside the housing (10), a measuring tube (20), a plurality of batteries (40) and a magnetic yoke (80), wherein the display assembly (30) comprises a measuring circuit board (31), the measuring circuit board (31) is electrically connected to the measuring tube (20) via a connecting line (50), the measuring circuit board (31), the magnetic yoke (80), the measuring tube (20) and the battery (40) are arranged in sequence, and the measuring circuit board (31), the magnetic yoke (80) and the measuring tube (20) are connected to form an integrated structure.

2. The electromagnetic flowmeter according to claim 1, characterized in that: The display assembly (30) comprises a first potting cavity (300) for pouring potting glue, and the measuring tube (20) comprises a second potting cavity (400) for pouring potting glue, the first potting cavity (300) is connected to the second potting cavity (400), and the opening direction of the first potting cavity (300) and the opening direction of the second potting cavity (400) are located in the same direction.

3. The electromagnetic flowmeter according to claim 1, characterized in that: The display assembly (30) and the measuring conduit (20) are snap-connected via a snap-connection structure (60); or, the display assembly (30) and the measuring conduit (20) are connected via a guide groove; or, the display assembly (30) and the measuring conduit (20) are fixedly connected via screws.

4. The electromagnetic flowmeter according to claim 2, characterized in that: The display assembly (30) comprises a connecting bracket (32), the connecting bracket (32) is provided with the first potting cavity (300), the measuring circuit board (31) is accommodated in the first potting cavity (300), a sealing ring (70) is provided between the connecting bracket (32) and the measuring conduit (20), and the sealing ring (70) is provided at the connection point between the first potting cavity (300) and the second potting cavity (400).

5. The electromagnetic flowmeter according to claim 4, 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 sensing electrodes (24) arranged on the tube body (21); the magnetic yoke (80) surrounds the outside of the fixed bracket (22); the fixed bracket (22) is provided with a second potting cavity (400); the sensing electrode (24) and the magnetic conductive component (23) are accommodated in the second potting cavity (400); the connecting bracket (32) is provided with a surface facing the fixed bracket (22) and connected to the first potting cavity (300); 00) and a first wire passing hole (313) for the connecting wire (50) to pass through, a second wire passing hole (222) communicating with the second potting cavity (400) and for the connecting wire (50) to pass through is opened on the surface of the fixing bracket (22) facing the connecting bracket (32), the magnetic yoke (80) avoids the first wire passing hole (313) and the second wire passing hole (222), the first wire passing hole (313) is connected with the second wire passing hole (222), so that the potting glue of the first potting cavity (300) flows to the second potting cavity (400) through the first wire passing hole (313) and the second wire passing hole (222).

6. The electromagnetic flowmeter according to claim 5, characterized in that: A support member (314) is provided on a surface of the connecting bracket (32) facing away from the fixing bracket (22); a display screen (33) is provided on the measuring circuit board (31); the display screen (33) is placed on the measuring circuit board (31) in a horizontal direction; and the support member (314) is used to support the measuring circuit board (31) so that a gap exists between the measuring circuit board (31) and a surface of the connecting bracket (32) facing away from the fixing bracket (22).

7. The electromagnetic flowmeter according to claim 5, 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 passed through the two mounting plates (223); the mounting plates (223) are directly opposite to the connecting bracket (32); the magnetic conductive component (23) is clamped between the two mounting plates (223); a sealing film (226) is provided on the partition plate (224); a sealing film (226) is provided on each side of the fixed bracket (22); the two sealing films (226) and the partition plate (224) together form a sealed second potting cavity (400).

8. The electromagnetic flowmeter according to claim 1, characterized in that: The housing (10) comprises a top shell (11) and a bottom shell (12) which cover each other, the top shell (11) and the measuring tube (20) together form a first cavity (100), the bottom shell (12) and the measuring tube (20) together form a second cavity (200), the display component (30) is accommodated in the first cavity (100), the battery (40) is accommodated in the second cavity (200), and the top shell (11) and the bottom shell (12) are detachably connected.

9. The electromagnetic flowmeter according to claim 8, characterized in that: The inner wall of the bottom shell (12) is provided with a limiting structure for limiting the position of the battery (40).

10. The electromagnetic flowmeter according to claim 9, characterized in that: The limiting structure is a limiting rib (13), the limiting rib (13) is protruding from the inner wall of the bottom shell (12), and the surface of the limiting rib (13) facing the second cavity (200) is clamped with the outer peripheral surface of the battery (40).

11. The electromagnetic flowmeter according to claim 10, characterized in that: The battery (40) is a cylindrical structure, and the surface of the limiting rib (13) facing the second cavity (200) is an arc-shaped surface, and the arc-shaped surface is in contact with the cylindrical surface of the battery (40).

12. The electromagnetic flowmeter according to claim 10, 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 bottom wall (121) and the peripheral wall (122) together form the second cavity (200); the limiting rib (13) is protruding from the bottom wall (121); the surface of the limiting rib (13) facing the second cavity (200) is clamped with the side wall of the battery (40).

13. The electromagnetic flowmeter according to any one of claims 8 to 12, characterized in that: The number of the batteries (40) is four, and the four batteries (40) are stacked to form a two-layer structure; or, the number of the batteries (40) is two, and the number of the batteries (40) is replaceable.

14. The electromagnetic flowmeter according to any one of claims 8 to 12, characterized in that: The covering surfaces of the top shell (11) and the bottom shell (12) pass through the central axis of the measuring tube (20).

Images