Household ultrasonic water meter

Abstract

A household ultrasonic water meter includes a lower outer shell, an upper outer shell, a lower bushing, an upper bushing, a pipe section and a transducer assembly, a mainboard module and a mainboard assembly, a battery box, a battery, and a battery box cover. The lower outer shell is fixed to the lower part of the pipe section and the transducer assembly by screws, and the upper outer shell is fixedly connected to the lower outer shell by screws. The lower bushing and upper bushing are correspondingly provided between the shell walls on both sides of the lower and upper outer shells and the pipe section. The battery box is located in the lower part of the upper outer shell, extending along the axial direction of the pipe section, and has an insertion port at one end near the pipe section port. One side of the battery box is fixed to the lower outer shell by screws, and the other side is snapped onto the lower outer shell. A battery hole is provided in the lower part of the upper outer shell corresponding to the insertion port, and the battery is inserted into the battery box through the battery hole. The battery box cover is inserted into the battery hole and connected to the battery box by screws. The mainboard module of the mainboard assembly is snapped onto the battery box. In this embodiment, the battery can be replaced without opening the upper outer shell, simplifying the operation process.

Description

Technical Field

[0001] This application relates to the field of ultrasonic water meter technology, and more particularly to a household ultrasonic water meter. Background Technology

[0002] NB-IoT (Narrow Band Internet of Things) technology is an emerging communication technology in the Internet of Things (IoT) field. It boasts advantages such as massive connectivity, deep coverage, low power consumption, and low cost, making it suitable for various scenarios across multiple industries and sectors. The introduction of NB-IoT technology can solve the two major obstacles faced by existing smart water meters: high power consumption and poor network communication. It also enables remote metering and intelligent control, significantly extending the lifespan of water meters.

[0003] NB-IoT household ultrasonic water meters are water meters that measure water flow. They determine the water flow velocity by detecting the time difference caused by the change in speed of an ultrasonic beam as it propagates upstream and downstream in water, and then calculate the water flow rate. Ultrasonic water meters have advantages such as low starting velocity, wide rangeability, high measurement accuracy, and stable operation. Furthermore, ultrasonic water meters have no moving parts or flow obstructions and are unaffected by impurities in the water, resulting in a long service life and excellent low-flow-rate detection capabilities, thus possessing a broad application market and promising future.

[0004] In related technologies, NB-IoT household ultrasonic water meters include components such as pipe sections and ultrasonic transducers, mainboard modules and mainboards, NB-IoT panel antennas, lower and upper housings, meter covers, and battery boxes. The upper and lower housings enclose the pipe section, which has a water flow channel for water to pass through. The ultrasonic transducer is mounted on the pipe section for transmitting and receiving ultrasonic signals, and an ultrasonic reflector is installed inside the pipe section. The battery box, mainboard module, and mainboard are located above the pipe section inside the upper housing. The mainboard module and mainboard can calculate the water flow rate based on the electrical signals output by the ultrasonic transducers.

[0005] In the above technical solutions, most of the internal components such as the motherboard module and motherboard are installed with screws, which is cumbersome to disassemble; and the battery box is installed in the cavity of the upper shell. When the battery needs to be replaced, the lead seal of the water meter must be removed and the upper shell opened to replace it, which is inconvenient to operate and the disassembly and assembly operations affect the overall connectivity; furthermore, different diameter pipe sections need to be configured with corresponding lower shells and upper shells, which increases the production cost. Utility Model Content

[0006] To address at least one of the problems mentioned in the background art, embodiments of this application provide a household ultrasonic water meter that simplifies the installation and disassembly process through multiple snap-fit ​​connections between internal components; by providing a battery hole in the upper casing for battery insertion, the battery can be replaced without opening the upper casing, simplifying the battery replacement operation; and by providing an upper and lower bushing, the adaptability of the upper and lower casings to pipe sections of different diameters is improved, reducing production costs.

[0007] To achieve the above objectives, this application provides a household ultrasonic water meter, including a lower outer shell, an upper outer shell, a lower bushing, an upper bushing, a pipe section and a transducer assembly, a main board module and a main board assembly, a battery box, a battery, and a battery box cover.

[0008] The lower outer shell is fixed to the lower part of the pipe section and the transducer assembly by screws, and lower bushings are provided between the shell walls on both sides of the lower outer shell and the pipe section of the pipe section and the transducer assembly.

[0009] The upper outer shell is fixedly connected to the upper outer shell by screws. Upper bushings are provided between the shell walls on both sides of the upper outer shell and the pipe section and the pipe section of the transducer assembly.

[0010] The battery box, the battery, and the motherboard module and motherboard assembly are all installed inside the upper outer shell. The battery box is located at the lower part of the upper outer shell, extends along the axis of the pipe segment, and has an insertion port at one end near the pipe segment port. One side of the battery box, corresponding to the axis of the pipe segment, is fixed to the lower outer shell by screws, and the other side is snapped onto the lower outer shell. The battery is inserted into the battery box. The lower shell wall of the upper outer shell has a battery hole corresponding to the insertion port, and the battery box cover is inserted into the battery hole and connected to the battery box with screws.

[0011] The motherboard module and motherboard assembly are mounted on the battery box. The battery output line, the transducer output line of the tube segment and transducer assembly, and the temperature sensor output line are all electrically connected to the motherboard of the motherboard module and motherboard assembly.

[0012] In one feasible implementation, the outer periphery of the upper bushing is provided with a slot for engaging the upper outer shell, and the center of the upper bushing is tightly fitted with the pipe section.

[0013] The outer periphery of the lower bushing is provided with a slot for mounting the lower housing, and the center of the lower bushing is tightly fitted with the pipe section.

[0014] In one feasible implementation, the battery box cover is fixedly connected to the battery box by screws, the head of the screws being located in a pre-set countersunk hole in the battery box, and a screw protective cover is inserted into the countersunk hole.

[0015] In one feasible implementation, a screw mounting tube is provided inside the upper outer shell, and a connecting post corresponding to the screw mounting tube is provided in the lower outer shell. A screw is installed between the connecting post and the screw mounting tube, and the head of the screw is located in a pre-set countersunk hole in the connecting post. A screw protective cap is plugged into the countersunk hole.

[0016] In one feasible implementation, the device further includes a watch cover that is fastened to the upper outer casing. One end of the watch cover is hinged to a pre-set groove on one side of the upper outer casing, and the other end of the watch cover is provided with a snap-fit ​​interface. The upper outer casing is provided with a snap-fit ​​protrusion corresponding to the snap-fit ​​interface on the side opposite to the hinge, and the snap-fit ​​protrusion is snapped and fixed to the snap-fit ​​interface.

[0017] In one feasible implementation, the pipe segment and transducer assembly includes a pipe segment, a transducer, a temperature sensor, and a pressure plate. A mounting groove and a threaded groove are spaced apart along the same axis in the middle of the pipe segment. The transducer is mounted in the mounting groove, and a sealing gasket is installed between the transducer and the mounting groove. The temperature sensor is threaded into the threaded groove, and an O-ring is installed between the temperature sensor and the threaded groove. A probe insertion hole communicating with the inner cavity of the pipe segment is provided at the bottom of the threaded groove. The pressure plate is fixed to a pre-set boss on the pipe segment by screws. The pressure plate has a transducer pressing hole and a sensor through hole. The pressing hole presses against the outer periphery of the transducer, and the transducer output line passes through the pressing hole. The temperature sensor output line passes through the sensor through hole.

[0018] In one feasible implementation, the pressure plate is disposed parallel to the shell wall of the lower outer casing, and a mounting plate parallel to the pressure plate is disposed on the bottom surface of the lower outer casing. The upper part of the mounting plate is higher than the shell wall of the lower outer casing and is connected to the pressure plate by screws.

[0019] In one feasible implementation, the pipe segment and transducer assembly further includes a plastic sleeve and two reflectors; the plastic sleeve is fitted into the middle of the inner cavity of the pipe segment, an O-ring is installed between the plastic sleeve and the pipe segment, and a probe hole is opened on the plastic sleeve corresponding to the position of the temperature sensor; the two reflectors are symmetrically installed at both ends of the pipe segment, one end of the reflector is inserted into a preset slot in the plastic sleeve, and the other end of the reflector is freely positioned.

[0020] In one feasible implementation, the motherboard module is a transparent box with an open bottom, and the motherboard is fitted onto the upper part of the motherboard module; an LCD screen is disposed on the top of the motherboard, and spacers are disposed around the outer periphery of the LCD screen on the motherboard; a display window is disposed on the lower outer shell corresponding to the position of the LCD screen; the motherboard is soldered to the transducer output line, the temperature sensor output line, and the battery output line, and an NB-IoT board antenna is soldered onto the motherboard; the motherboard module is potted with sealant.

[0021] This application provides a household ultrasonic water meter, including a lower outer shell, an upper outer shell, a lower bushing, an upper bushing, a pipe section and transducer assembly, a main board module and main board assembly, a battery box, a battery, and a battery box cover. By setting the battery box to snap onto the lower outer shell and the main board module to snap onto the main board, the number of screws required is reduced, simplifying the assembly and disassembly process. By opening a battery hole on the side of the upper outer shell, the battery is inserted into the battery box, and then the battery box cover is installed, allowing battery replacement without opening the upper outer shell, which is convenient and reduces disruption to the overall connection stability. By setting an upper bushing between the pipe section and the upper outer shell, and a lower bushing between the pipe section and the lower outer shell, only the upper and lower bushings need to be replaced to accommodate pipe sections of different diameters, reducing production costs. The upper and lower outer shells enclose all components, resulting in an aesthetically pleasing appearance and a simple structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a household ultrasonic water meter provided in an embodiment of this application;

[0024] Figure 2 for Figure 1 First-person perspective explosion diagram;

[0025] Figure 3 for Figure 1 A second-person perspective explosion diagram;

[0026] Figure 4 A front view of a household ultrasonic water meter provided in an embodiment of this application;

[0027] Figure 5 for Figure 4 AA view;

[0028] Figure 6 for Figure 4BB view;

[0029] Figure 7 for Figure 4 CC view;

[0030] Figure 8 This is a front view of the motherboard module and motherboard assembly provided in an embodiment of this application;

[0031] Figure 9 This is a front view of the pipe section and transducer assembly provided in an embodiment of this application;

[0032] Figure 10 for Figure 9 DD-direction view;

[0033] Figure 11 for Figure 10 EE view.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100-Household ultrasonic water meter;

[0036] 110 - Lower outer casing; 111 - Lower bushing; 112 - Mounting plate;

[0037] 120 - Upper outer casing; 121 - Upper bushing; 122 - Battery hole; 123 - Screw mounting tube;

[0038] 130 - Battery compartment; 131 - Battery; 132 - Battery compartment cover;

[0039] 140 - Motherboard module and motherboard assembly; 141 - Motherboard module; 142 - Motherboard; 143 - LCD screen; 144 - Spacer; 145 - Board antenna;

[0040] 150 - Watch cover;

[0041] 160 - Pipe section and transducer assembly; 161 - Pipe section; 162 - Transducer; 163 - Temperature sensor; 164 - Pressure plate; 165 - Plastic sleeve; 166 - Reflector;

[0042] 171 - Card interface; 172 - Card mounting protrusion;

[0043] 180 - Screw; 181 - Screw cap; 182 - Lead seal;

[0044] 191 - Sealing gasket; 192 - O-ring seal. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. It is worth noting that the embodiments described in the accompanying drawings are only some embodiments of this application, and not all embodiments. That is, the embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0046] The following will combine Figures 1-11 The household ultrasonic water meter 100 provided in the embodiments of this application will be described.

[0047] This application provides a household ultrasonic water meter 100, with reference to... Figures 1-7 As shown, it includes a lower outer shell 110, an upper outer shell 120, a lower bushing 111, an upper bushing 121, a pipe section and transducer assembly 160, a motherboard module and motherboard assembly 140, a battery box 130, a battery 131, and a battery box cover 132.

[0048] The lower housing 110 is fixed to the lower part of the pipe section and the transducer assembly 160 by screws 180. Lower bushings 111 are provided between the shell walls on both sides of the lower housing 110 and the pipe section 161 of the pipe section and the transducer assembly 160.

[0049] The upper outer shell 120 is fixedly connected to the upper outer shell 110 by screws 180. Upper bushings 121 are provided between the shell walls on both sides of the upper outer shell 120 and the tube section and the tube section 161 of the transducer assembly 160.

[0050] The battery box 130, battery 131, motherboard module, and motherboard assembly 140 are all installed inside the upper housing 120. The battery box 130 is located at the lower part of the upper housing 120, extending along the axis of the pipe segment 161, and has an insertion port at one end near the port of the pipe segment 161. One side of the battery box 130 corresponding to the axis of the pipe segment 161 is fixed to the lower housing 110 by screws 180, and the other side of the battery box 130 corresponding to the axis of the pipe segment 161 is snapped onto the lower housing 110. The battery 131 is inserted into the battery box 130. The lower shell wall of the upper housing 120 has a battery hole 122 corresponding to the insertion port, and the battery box cover 132 is inserted into the battery hole 122 and connected to the battery box 130 by screws.

[0051] The motherboard module 141 of the motherboard module and motherboard assembly 140 is mounted on the battery box 130. The battery output line, the tube segment, the transducer output line of the transducer assembly 160, and the temperature sensor output line are all electrically connected to the motherboard 142 of the motherboard module and motherboard assembly 140.

[0052] The upper outer shell 120 and the lower outer shell 110 have shell walls on both sides corresponding to the positions near the end of the pipe section 161. An upper bushing 121 is installed between the shell wall of the upper outer shell 120 and the pipe section 161, and a lower bushing 111 is installed between the shell wall of the lower outer shell 110 and the pipe section 161. This allows for the machining of only the same model of upper outer shell 120 and lower outer shell 110. For different pipe section outer diameters, only different models of upper bushing 121 and lower bushing 111 need to be replaced to achieve a tight connection between the upper outer shell 120 and the lower outer shell 110 and the pipe section 161, reducing the production cost of machining different models of shells.

[0053] One side of the battery box 130 is fixed to the lower outer casing 110 with a Phillips head screw, while the other side is snapped onto the lower outer casing 110. This ensures a stable connection between the battery box 130 and the lower outer casing 110 and facilitates overall assembly and disassembly. The battery 131 is inserted into the battery box 130 through the battery hole 122 on the upper outer casing 120. One end of the battery output cable is electrically connected to the battery 131 using existing plug connection technology, and the other end is electrically connected to the main board 142, providing power support to the main board 142. The battery box cover 132 fits tightly with the battery hole 122, facilitating effective sealing of the battery 131. A lead seal 182 for the water meter can be installed between the upper outer casing 120 and the lower outer casing 110, and a lead seal 182 for the battery box cover can be installed between the battery box cover 132 and the upper outer casing 120. When the battery 131 needs to be replaced, only the lead seal 182 of the battery box cover needs to be opened; the upper outer casing 120 does not need to be opened.

[0054] The household ultrasonic water meter 100 of this application embodiment reduces the number of screws 180 and simplifies the assembly and disassembly process by setting the battery box 130 to be snapped into the lower outer shell 110 and the main board module box 141 to be snapped into the main board 142. By opening a battery hole 122 on the side of the upper outer shell 120, the battery 131 is inserted into the battery box 130, and then the battery box cover 132 is added, so that the battery 131 can be replaced without opening the upper outer shell 120, which is convenient and reduces the damage to the overall connection stability. By setting an upper bushing 121 between the pipe section 161 and the upper outer shell 120 and a lower bushing 111 between the pipe section 161 and the lower outer shell 110, only the upper bushing 121 and the lower bushing 111 need to be replaced, so that the upper outer shell 120 and the lower outer shell 110 can be used for pipe sections 161 of different diameters, reducing production costs. The upper outer shell 120 and the lower outer shell 110 enclose all components, making the appearance beautiful and the structure simple.

[0055] In one feasible implementation, refer to Figure 1 , Figure 2 and Figure 4 As shown, the outer periphery of the upper bushing 121 is provided with a slot for mounting the outer casing 120, and the center of the upper bushing 121 is tightly fitted with the pipe section 161.

[0056] The outer periphery of the lower bushing 111 is provided with a slot for mounting the lower housing 110, and the center of the lower bushing 111 is tightly fitted with the pipe section 161.

[0057] When installing the lower housing 110, first, the lower bushing 111 is snapped onto the housing walls on both sides of the lower housing 110, then the pipe section 161 is snapped onto the lower bushing 111, and finally the lower housing 110 and the pipe section 161 are fixed together by cross-slot pan head screws.

[0058] When installing the upper housing 120, first, the upper bushing 121 is snapped onto the housing walls on both sides of the upper housing 120. Then, the upper bushing 121 and the upper housing 120 are pressed together onto the pipe section 161. Next, the upper housing 120 and the lower housing 110 are fixed together with cross-slot pan head self-tapping screws, and screw protection caps 181 are installed. Finally, the lead seals 182 of the water meter are installed at the lead seal positions of the upper housing 120 and the lower housing 110.

[0059] In one feasible implementation, refer to Figures 1-3 and Figure 7 As shown, the battery box cover 132 is fixedly connected to the battery box 130 by screws 180. The head of the screw 180 is located in a pre-set countersunk hole in the battery box 130, and a screw protective cover 181 is installed in the countersunk hole.

[0060] During installation, first fix the battery box cover 132 to the battery box 130 with hex socket head cap screws, then add the screw protection cover 181, and finally add the lead seal 182 of the battery box cover at the lead seal position between the upper outer shell 120 and the battery box cover 132.

[0061] Among them, a screw protection cover 181 is added to the protective cover of the battery box 130, which can be used to prevent accidental disassembly or loosening of screws. This setting can further improve the overall stability of the device.

[0062] In one feasible implementation, refer to Figure 5 As shown, the upper outer shell 120 is provided with a screw mounting tube 123 inside, and the lower outer shell 110 is provided with a connecting post corresponding to the screw mounting tube 123. A screw 180 is installed between the connecting post and the screw mounting tube 123. The head of the screw 180 is located in the pre-set connecting countersunk hole of the connecting post, and a screw protective cap 181 is plugged into the connecting countersunk hole.

[0063] In this way, the screw 180 can be embedded in the connecting countersunk hole of the lower housing 110, with no obvious protruding screws on the upper housing 120 and the side, which is aesthetically pleasing and can prevent accidental disassembly or screw loosening, thus improving the overall stability of the device.

[0064] In one feasible implementation, refer to Figures 2-4As shown, the household ultrasonic water meter 100 also includes a meter cover 150 that is fastened to the upper outer shell 120. One end of the meter cover 150 is hinged to one side of the upper outer shell 120, and the other end of the meter cover 150 is provided with a snap-fit ​​interface 171. The upper outer shell 120 is provided with a snap-fit ​​protrusion 172 corresponding to the snap-fit ​​interface 171 on the side opposite to the hinge. The snap-fit ​​protrusion 172 is snapped and fixed to the snap-fit ​​interface 171.

[0065] The upper outer casing 120 has recessed holes machined on two opposite sides of its groove. The watch cover 150, hinged to the groove, includes two protrusions, which are correspondingly fitted into the recessed holes. An operating gap is machined on the watch cover 150 between the two protrusions, facilitating the use of the plastic's elasticity and the operating gap to engage the protrusions within the recessed holes. Thus, the watch cover 150 can rotate around the axis of the protrusions, achieving a hinged connection between the watch cover 150 and the upper outer casing 120. On the other side of the upper outer casing 120, the elasticity of the plastic is utilized to engage and secure it via a recessed hole in the snap-fit ​​interface 171 and a snap-fit ​​protrusion 172.

[0066] With this configuration, the upper outer casing 120 and the meter cover 150 are hinged together. The meter cover 150 can be flipped to observe the measurement data, making operation convenient and providing a certain degree of protection for the upper outer casing 120.

[0067] In one feasible implementation, refer to Figures 9-11 As shown, the pipe section and transducer assembly 160 includes a pipe section 161, a transducer 162, a temperature sensor 163, and a pressure plate 164. A mounting groove and a threaded groove are spaced apart along the same axis in the middle of the pipe section 161. The transducer 162 is mounted in the mounting groove, and a sealing gasket 191 is installed between the transducer 162 and the mounting groove. The temperature sensor 163 is threaded into the threaded groove, and an O-ring seal 192 is installed between the temperature sensor 163 and the threaded groove hole. A probe insertion hole communicating with the inner cavity of the pipe section 161 is provided at the bottom of the threaded groove. The pressure plate 164 is fixed to a pre-set boss on the pipe section 161 by screws 180. The pressure plate 164 has a transducer pressing hole and a sensor through hole. The pressing hole presses onto the outer periphery of the transducer 162, and the transducer output line passes through the pressing hole, while the temperature sensor output line passes through the sensor through hole.

[0068] Transducer 162 is an ultrasonic transducer. The ultrasonic transducers are arranged in pairs, and the optional mounting grooves are correspondingly arranged on both sides of the threaded groove.

[0069] During installation, the transducer 162 is fitted with the sealing gasket 191 and inserted into the mounting groove. Then, the temperature sensor 163 is fitted with the O-ring 192 and threaded into the threaded groove, and the temperature sensor 163 is tightened. Finally, the pressure plate 164 is secured to the pipe section 161 with Phillips head countersunk screws.

[0070] In this way, the pressure plate 164 effectively fixes the transducer 162 and the temperature sensor 163, and facilitates the connection between the pipe section 161 and the lower housing 110.

[0071] In one feasible implementation, refer to Figure 2 , Figures 5-7 As shown, the pressure plate 164 is arranged parallel to the shell wall of the lower outer shell 110, and the bottom surface of the lower outer shell 110 is provided with a mounting plate 112 parallel to the pressure plate 164. The upper part of the mounting plate 112 is higher than the shell wall of the lower outer shell 110 and is connected to the pressure plate 164 by screws 180.

[0072] Among them, the pressure plate 164 can extend in the vertical direction, the battery box 130 can be provided with a snap-fit ​​protrusion 172 on one side corresponding to the mounting plate 112, and the upper part of the mounting plate 112 is provided with a snap-fit ​​interface 171 for connecting the battery box 130.

[0073] In this way, the pressure plate 164 serves as an intermediate connector between the lower outer casing 110 and the pipe section 161, facilitating the individual disassembly and replacement of each component. Simultaneously, the mounting plate 112 can be used to snap the battery box 130 into place, and the other side of the battery box 130 can be connected to the lower outer casing 110 via a structure similar to a screw-connected pipe.

[0074] In one feasible implementation, refer to Figures 10-11 As shown, the pipe section and transducer assembly 160 also includes a plastic sleeve 165 and two reflectors 166. The plastic sleeve 165 is fitted into the middle of the inner cavity of the pipe section 161. An O-ring 192 is installed between the plastic sleeve 165 and the pipe section 161. A probe hole is formed in the plastic sleeve 165 corresponding to the position of the temperature sensor 163. The two reflectors 166 are symmetrically installed at both ends of the pipe section 161. One end of the reflector 166 is inserted into a pre-set slot in the plastic sleeve 165, while the other end of the reflector 166 is freely positioned.

[0075] During installation, insert the plastic sleeve 165 into the middle of the inner cavity of the pipe section 161, and seal the two with an O-ring 192. Then, insert the reflector 166 into both ends of the pipe section 161, with the inner end inserted into the plastic sleeve 165. The installation is convenient and reliable.

[0076] In one feasible implementation, refer to Figures 4-6 and Figure 8As shown, the motherboard module 141 is a transparent box with an open bottom, and the motherboard 142 is fitted onto the upper part of the motherboard module 141. An LCD screen 143 is mounted on top of the motherboard 142, and spacers 144 surround the outer perimeter of the LCD screen 143 on the motherboard 142. A display window is positioned on the lower outer casing 110 corresponding to the position of the LCD screen 143. The motherboard 142 is soldered to the transducer output line, temperature sensor output line, and battery output line, and an NB-IoT board antenna 145 is soldered onto the motherboard 142. The motherboard module 141 is encapsulated with sealant.

[0077] During installation, the spacer 144 is first installed onto the motherboard 142. The motherboard module 141 has clips on both sides of its inner cavity; the motherboard 142, which also has communication functions, is then secured onto the motherboard module 141. The NB-IoT board antenna 145 is directly soldered onto the motherboard 142. After the transducer output lines, temperature sensor output lines, and battery output lines are soldered onto the motherboard 142, the motherboard module 141 is then potted.

[0078] The NB-IoT board antenna 145 is soldered onto the motherboard 142, taking up no space, and transmits water meter data via the NB network. The area inside the motherboard module 141 and outside the spacer 144 is potted with sealant, achieving an IP68 protection rating. The spacer 144 is made of sponge or other elastic material to prevent sealant from entering the LCD screen 143, thus improving its lifespan.

[0079] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" in the description of this application should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0080] The terms “upper,” “lower,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0081] The term "multiple" means two or more, unless otherwise specified precisely.

[0082] The terms “first,” “second,” “third,” “fourth,” etc., (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can include implementations in sequences other than those illustrated or described herein.

[0083] The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A domestic ultrasonic water meter, characterized in that, Includes a lower housing, an upper housing, a lower bushing, an upper bushing, pipe sections and transducer assemblies, a motherboard module and motherboard assembly, a battery box, a battery, and a battery box cover; The lower outer shell is fixed to the lower part of the pipe section and the transducer assembly by screws, and lower bushings are provided between the shell walls on both sides of the lower outer shell and the pipe section of the pipe section and the transducer assembly. The upper outer shell is fixedly connected to the upper outer shell by screws. Upper bushings are provided between the shell walls on both sides of the upper outer shell and the pipe section and the pipe section of the transducer assembly. The battery box, the battery, and the motherboard module and motherboard assembly are all installed inside the upper outer shell. The battery box is located at the lower part of the upper outer shell, extends along the axis of the pipe segment, and has an insertion port at one end near the pipe segment port. One side of the battery box, corresponding to the axis of the pipe segment, is fixed to the lower outer shell by screws, and the other side is snapped onto the lower outer shell. The battery is inserted into the battery box. The lower shell wall of the upper outer shell has a battery hole corresponding to the insertion port, and the battery box cover is inserted into the battery hole and connected to the battery box with screws. The motherboard module and motherboard assembly are mounted on the battery box. The battery output line, the transducer output line of the tube segment and transducer assembly, and the temperature sensor output line are all electrically connected to the motherboard of the motherboard module and motherboard assembly.

2. The household ultrasonic water meter according to claim 1, characterized in that The outer periphery of the upper bushing is provided with a slot for mounting the upper outer shell, and the center of the upper bushing is tightly fitted with the pipe section; The outer periphery of the lower bushing is provided with a slot for mounting the lower housing, and the center of the lower bushing is tightly fitted with the pipe section.

3. The household ultrasonic water meter according to claim 2, characterized in that, The battery box cover is fixedly connected to the battery box by screws. The head of the screw is located in a pre-set countersunk hole in the battery box, and a screw protective cover is inserted into the countersunk hole.

4. The household ultrasonic water meter according to any one of claims 1-3, characterized in that, The upper outer shell has a screw mounting tube inside, and the lower outer shell has a connecting post corresponding to the screw mounting tube. A screw is installed between the connecting post and the screw mounting tube. The head of the screw is located in a pre-set countersunk hole in the connecting post, and a screw protective cap is inserted into the countersunk hole.

5. The household ultrasonic water meter according to any one of claims 1-3, characterized in that, It also includes a watch cover that is fastened to the upper outer shell. One end of the watch cover is hinged to a pre-set groove on one side of the upper outer shell, and the other end of the watch cover is provided with a snap-fit ​​interface. The upper outer shell is provided with a snap-fit ​​protrusion corresponding to the snap-fit ​​interface on the side opposite to the hinge. The snap-fit ​​protrusion is snapped and fixed to the snap-fit ​​interface.

6. The household ultrasonic water meter according to any one of claims 1-3, characterized in that, The pipe section and transducer assembly includes a pipe section, a transducer, a temperature sensor, and a pressure plate. A mounting groove and a threaded groove are spaced apart along the same axis in the middle of the pipe section. The transducer is installed in the mounting groove, and a sealing gasket is installed between the transducer and the mounting groove. The temperature sensor is threaded into the threaded groove, and an O-ring is installed between the temperature sensor and the threaded groove. A probe insertion hole communicating with the inner cavity of the pipe section is provided at the bottom of the threaded groove. The pressure plate is fixed to a pre-set boss on the pipe section by screws. The pressure plate has a transducer pressing hole and a sensor through hole. The pressing hole presses against the outer periphery of the transducer, and the transducer output line passes through the pressing hole. The temperature sensor output line passes through the sensor through hole.

7. The household ultrasonic water meter according to claim 6, characterized in that, The pressure plate is arranged parallel to the shell wall of the lower outer shell, and a mounting plate parallel to the pressure plate is arranged on the bottom surface of the lower outer shell. The upper part of the mounting plate is higher than the shell wall of the lower outer shell and is connected to the pressure plate by screws.

8. The household ultrasonic water meter according to claim 6, characterized in that, The pipe section and transducer assembly also include a plastic sleeve and two reflectors; the plastic sleeve is fitted into the middle of the inner cavity of the pipe section, and an O-ring is installed between the plastic sleeve and the pipe section. A probe hole is opened on the plastic sleeve corresponding to the position of the temperature sensor; the two reflectors are symmetrically installed at both ends of the pipe section, one end of the reflector is inserted into a preset slot in the plastic sleeve, and the other end of the reflector is freely positioned.

9. The household ultrasonic water meter according to any one of claims 1-3, characterized in that, The motherboard module is a transparent box with an open bottom, and the motherboard is fitted into the upper part of the motherboard module; an LCD screen is provided on the top of the motherboard, and a spacer is provided around the outer perimeter of the LCD screen on the motherboard; a display window is provided on the lower outer shell corresponding to the position of the LCD screen. The motherboard is soldered to the transducer output line, the temperature sensor output line, and the battery output line, and an NB-IoT board antenna is soldered onto the motherboard. The motherboard module is potted with sealant.

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