NB water meter counter and water meter

Abstract

The invention relates to an NB water meter counter, which belongs to the technical field of water meters, and comprises a flow sensor, a control module, a power supply module, a control switch, a rotation monitoring assembly and a driving assembly, the driving assembly is used for providing auxiliary driving when the impeller does not respond to water flow and connected with the control switch, the control switch is connected with the control module, the control module is connected with the power module, the flow sensor is used for detecting water flow changes, and the rotation monitoring assembly is used for detecting whether the impeller rotates or not. The control module is used for comparing the water flow change detected by the flow sensor with the detection result of the rotation monitoring assembly, and when it is detected that water flow exists but the impeller does not rotate synchronously, the control module controls the control switch to be closed so that the driving assembly can drive the main shaft to rotate. The power module provides operation power for the driving assembly, the flow sensor and the control module. The NB water meter has the effect of improving accurate metering of the NB water meter in various water using states.

Description

Technical Field

[0001] This application relates to the technical field of water meters, and particularly to an NB water meter counter and a water meter. Background Art

[0002] With the development of smart cities and Internet of Things technologies, NB-IoT (Narrow Band Internet of Things) water meters, as important terminal devices for remote meter reading and intelligent water use management, have been widely used in various buildings and public facilities. NB water meters usually achieve real-time monitoring of water consumption and remote uploading through built-in sensors and communication modules, improving the meter reading efficiency and data accuracy.

[0003] In the existing NB water meter counter structure, a mechanical impeller is generally used as the main component for sensing water flow. The mechanical impeller is driven by water flow to rotate, thereby driving the gear assembly to operate, achieving counting indication and coding output. However, in the case of small water flows such as low flow or intermittent dripping, due to insufficient water flow impact force, the impeller is difficult to overcome its own rotational inertia and bearing friction, and the impeller may fail to rotate normally, resulting in inaccurate measurement or uploading of actual water use and affecting the measurement accuracy. Summary of the Invention

[0004] In order to improve the accurate measurement of NB water meters under various water use conditions, this application provides an NB water meter counter and a water meter.

[0005] The NB water meter counter provided by this application adopts the following technical solutions: An NB water meter counter includes a main shaft, a gear set, a pointer set, a dial counter, a coding disk, and an NB signaling device. The main shaft is coaxially connected with an impeller. The main shaft controls the operation of the gear set. The gear set drives the pointer set to operate to display the water volume in liters used. The gear set controls the operation of the dial counter to display the water volume in cubic meters used. The gear drives the coding disk to rotate. The NB signaling device is used to receive the rotational change of the coding disk, generate a digital signal representing the water consumption, and upload it. It also includes a flow sensor, a control module, a power module, a control switch, a rotation monitoring component, and a driving component; The drive assembly is used to provide auxiliary drive when the impeller does not respond to water flow. The drive assembly is connected to the control switch, the control switch is connected to the control module, the control module is connected to the power module, the flow sensor is used to detect changes in water flow, the rotation monitoring assembly is used to detect whether the impeller is rotating, and the control module is used to compare the water flow change detected by the flow sensor with the detection result of the rotation monitoring assembly. When it is detected that there is water flow and the impeller does not rotate synchronously, the control module controls the control switch to close so that the drive assembly drives the main shaft to rotate. The power module provides operating power for the drive assembly, the flow sensor and the control module.

[0006] By adopting the above technical solution, when the user turns on the water-using equipment, the water supply system generates water flow, which first enters the NB water meter and acts on the impeller. Under normal circumstances, the water flow impacts the impeller to make it rotate, and the impeller drives the gear group to rotate through the coaxially connected main shaft, and then drives the digital pointer group and the digital wheel counter to realize the mechanical display of the water consumption in liters and cubic meters respectively. At the same time, the gear group also drives the encoder disk to rotate, and the rotation change of the encoder disk is sensed in real time by the NB signaling device and converted into a digital signal, which is uploaded to the remote system to realize data collection and monitoring.

[0007] During the operation of the system, the flow sensor monitors the water flow status in real time and transmits the detected flow signal to the control module. At the same time, the rotation monitoring component is responsible for sensing the actual rotation status of the impeller and sending a feedback signal of the impeller rotation to the control module; When the flow sensor detects that there is water flow but the rotation monitoring component does not feedback the impeller rotation signal, the control module will determine that the current state is "small water flow and the impeller is not rotating". At this time, the control module will start timing from this abnormal state and record the accumulated water discharge. If this state lasts for a certain period of time, that is, the accumulated water discharge reaches the measurement unit corresponding to the minimum scale of the digital pointer group, the control module will control the control switch to close, the drive circuit to turn on the drive component to activate, and provide short-term rotation power to the main shaft, so that the corresponding minimum scale pointer in the pointer group jumps one unit, realizing the physical measurement compensation of the small water discharge; If the impeller resumes normal rotation before the abnormal state accumulates to the minimum range, the control module will record the current accumulated leakage and continue monitoring; when the subsequent leakage accumulates to the minimum scale unit, it will also trigger the control switch to close once, drive the main shaft to complete a compensation jump, and then immediately disconnect the switch.

[0008] The NB water meter counter system achieves "full metering" through the collaboration of software and hardware, ensuring that water usage is recorded and uploaded truthfully even under the smallest water flow conditions, while taking into account high precision, low power consumption and high reliability.

[0009] Optionally, it further includes a power generation component for converting the kinetic energy of the rotation of the main shaft into electrical energy and storing it in the power supply module.

[0010] By adopting the above technical solution, kinetic energy is generated during the rotation of the impeller with the water flow, and is converted into electrical energy and stored in the power supply module to supply power to the NB water meter system without an external power supply.

[0011] Optionally, the drive component includes a stator seat and a rotor seat. The rotor seat is coaxially installed on the main shaft and sleeved inside the stator seat. The control switch includes a plurality of MOS switch tubes. The coils of the stator seat are in one-to-one correspondence and connected with the MOS switch tubes. The control module is an MCU module. All the MOS switch tubes are connected with the MCU module. The rotation monitoring component is used to detect the angular position of the rotor seat in real time and transmit the detection signal to the MCU module; The MCU module controls the corresponding MOS switch tube to conduct according to the current angular position of the rotor seat, so that part of the stator coil is energized to generate a rotating magnetic field in the stator seat, thereby driving the rotor seat to rotate continuously; The drive power supply is a super capacitor.

[0012] By adopting the above technical solution, the rotor seat is coaxially installed on the main shaft, realizing a high degree of integration with the original water meter structure. The drive process has little impact on the existing mechanical system and is convenient for upgrading. A closed-loop drive logic of position detection, logical judgment, and precise excitation is formed, avoiding situations such as blind drive and over-drive, improving drive stability, and ensuring that the pointer does not misjump or overstep during the compensation jump.

[0013] Optionally, the rotation monitoring component includes a disk and several Weigand sensors. The disk is coaxially connected with the main shaft. The several Weigand sensors are arranged equidistantly along the circumference of the disk. The output ends of the Weigand sensors are connected with the MCU module.

[0014] By adopting the above technical solution, due to the characteristics of the Weigand sensor, when a magnetic field of a certain polarity parallel to the sensitive wire of the Weigand sensor reaches the trigger magnetic induction intensity, the magnetic domains in the sensitive wire are excited and will move, and the magnetization direction instantaneously turns to the same direction. At the same time, the magnetic field in the surrounding space of the sensitive wire also changes instantaneously, so that the Weigand sensor can sense an electrical pulse. Multiple Weigand sensors form multiple ordered pulse signals. The generation of the pulse signals can be used as a basis for judging whether the main shaft is rotating. Multiple ordered pulse signals can be used as a basis for the current rotation position of the main shaft, that is, the rotation position of the rotor seat. Furthermore, the control module can judge and close the corresponding MOS switch tubes to form a driving magnetic field for driving the rotor seat to rotate forward.

[0015] The Wiegand sensor does not require a power supply and has a stable output signal. Such a detection structure has high-precision, low-power, and non-contact angle recognition capabilities, can support precise drive control logic, and enhances the measurement accuracy and reliability of the entire intelligent water meter system.

[0016] Optionally, the power generation component includes a driving gear and a DC generator. The driving gear is coaxially fixed on the main shaft. The DC generator is connected with a driven gear. The driving gear meshes with the driven gear. The output end of the DC generator is connected with the power supply module, and is used for generating electricity when the main shaft rotates and supplying power to the power supply module.

[0017] Optionally, it further includes an installation box. The MCU module, the MOS switch tube, the DC motor, and the super capacitor are all installed in the installation box. The installation box is provided with interfaces connected to the Wiegand sensor and the stator base. The driven gear is rotatably connected to the installation box.

[0018] By adopting the above technical solution, key control and drive components such as the MCU module, the MOS switch tube, the DC motor, and the super capacitor are integrated in an integrated packaging structure, and at the same time are connected to the Wiegand sensor, the stator base, and the mechanical structure through standardized interfaces, effectively improving the integration, stability, and maintenance convenience of the system.

[0019] Optionally, the pointer group includes 4 pointers, the word wheel counter includes 5 word wheels, and a water flow indicating wheel is further connected to the gear group.

[0020] By adopting the above technical solution, the display mode of "6 word wheels + 3 pointers" is optimized to the combination of "5 word wheels + 4 pointers", reducing the decimal digit display of the red characters in the word wheel part, reducing the reading ambiguity and the probability of equipment misjudgment; at the same time, adding one pointer display enables precise indication of small flows at the pointer level, avoiding the risk of missing measurement caused by the failure of the word wheel to be driven at low flow rates. This structural optimization significantly improves the recognition accuracy and the first-pass production qualification rate of the NB base meter during the first inspection, and enhances the performance stability and service life of the entire meter.

[0021] The present application also provides an NB water meter adopting the following technical solution: An NB water meter, applying the above-mentioned NB water meter counter, includes a housing. An upper mounting seat is installed inside the housing. The upper mounting seat is connected to a lower mounting seat. The gear set, the digit wheel set and the pointer set are all installed inside the upper mounting seat. One end of the main shaft is located inside the upper mounting seat, and the other end is located inside the lower mounting seat. The impeller is located inside the lower mounting seat. The lower mounting seat is provided with a number of water passing holes. The flow sensor is installed at the water outlet of the housing. The bottom of the upper mounting seat is provided with a mounting groove. The mounting box is located inside the mounting groove. An installation space is reserved between the upper mounting seat and the main shaft. The upper mounting seat is provided with a number of first wire passing holes communicating with the installation space. The Wiegand sensor, the disk, the rotor seat, the stator seat and the driving gear are all located inside the installation space. The coils of the Wiegand sensor and the stator seat are electrically connected to the mounting box through the first wire passing holes. The rotating shaft of the DC generator passes through the mounting box and passes through the bottom wall of the mounting groove. A sealing ring is arranged inside the upper mounting seat. The sealing ring is sleeved on the main shaft and is located below the installation space.

[0022] By adopting the above technical solution, an installation space is arranged between the upper mounting seat and the main shaft, and a rotation monitoring component and a driving component are integrated inside the installation space, realizing high integration.

[0023] Optionally, the flow sensor adopts wired transmission. A second wire passing hole is opened on the outer side wall of the upper mounting seat. The flow sensor is electrically connected to the mounting box through the second wire passing hole.

[0024] Optionally, a support ring is threadedly connected to the housing. A dial is hinged on the support ring. The NB signaling device is installed on the support ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The NB water meter counter system realizes "full-scale measurement" through software and hardware collaboration, ensuring that even under the smallest water flow conditions, water usage can be truthfully recorded and uploaded, taking into account high precision, low power consumption and high reliability; 2. Kinetic energy is generated during the rotation of the impeller with the water flow and is converted into electrical energy and stored in the power supply module to supply power to the NB water meter system without an external power supply; 3. The rotor seat is coaxially installed on the main shaft, realizing high integration with the original water meter structure. The driving process has little modification to the existing mechanical system, facilitating upgrading. A closed-loop driving logic of position detection, logical judgment and precise excitation is formed, avoiding situations such as blind driving and over-driving, improving driving stability, and ensuring that the pointer does not misjump or overstep during the compensation jump. 4. The Wiegand sensor does not require a power supply and has a stable output signal. Such a detection structure has high-precision, low-power, and non-contact angle recognition capabilities, can support precise drive control logic, and enhances the measurement accuracy and reliability of the entire intelligent water meter system.

[0026] 5. The display method of "6-digit word wheel + 3-digit pointer" is optimized to the combination of "5-digit word wheel + 4-digit pointer", reducing the decimal digit display of the red characters in the word wheel part, and reducing the probability of reading ambiguity and equipment misjudgment; at the same time, adding one pointer display enables precise indication of small flows at the pointer level, avoiding the risk of missing measurement caused by the word wheel not being driven at low flow rates. This structural optimization significantly improves the recognition accuracy and first-pass production rate of the NB base meter during the first inspection, and enhances the performance stability and service life of the entire meter. Brief Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0028] Figure 2 is the structural schematic diagram of the embodiment of the present application for showing the NB signaling device, gear set, pointer set, and word wheel counter.

[0029] Figure 3 is the structural schematic diagram of the embodiment of the present application for showing the installation box, drive assembly, and power generation assembly.

[0030] Figure 4 is the structural schematic diagram of the embodiment of the present application for showing the drive assembly.

[0031] Figure 5 is the structural schematic diagram of the embodiment of the present application for showing the control module, power module, and control switch.

[0032] Figure 6 is the structural schematic diagram of the embodiment of the present application for showing the rotation monitoring component.

[0033] Figure 7 is the schematic diagram of the pulse signal of the embodiment of the present application.

[0034] Figure 8 is the principle flow chart of the embodiment of the present application.

[0035] Figure 9 is Figure 1 the enlarged schematic diagram of part A in

[0036] Description of reference numerals: 11, main shaft; 12, gear set; 13, pointer set; 14, word wheel counter; 15, coding disk; 16, NB signal transmitting device; 17, impeller; 18, mounting disk; 19, water flow indicating wheel; 21, mounting box; 22, flow sensor; 23, control module; 231, MCU module; 24, power module; 241, super capacitor; 25, control switch; 251, MOS switch tube; 3, rotation monitoring component; 31, disk; 33, Wiegand sensor; 4, driving component; 41, stator seat; 42, rotor seat; 5, power generation component; 51, driving gear; 52, driven gear; 53, DC generator; 6, housing; 7, upper mounting seat; 71, mounting groove; 72, mounting space; 73, first wire passing hole; 74, second wire passing hole; 75, sealing ring; 8, lower mounting seat; 81, water passing hole; 91, support ring; 92, dial plate. Detailed implementation manners

[0037] The following further elaborates on this application Figures 1-9 in conjunction with the accompanying drawings.

[0038] An embodiment of this application discloses an NB water meter counter.

[0039] As Figure 1 , Figure 2 and Figure 3 shown, the NB water meter counter includes a main shaft 11, a gear set 12, a pointer set 13, a word wheel counter 14, a coding disk 15, and an NB signal transmitting device 16. The main shaft 11 is coaxially connected with an impeller 17. The main shaft 11 controls the operation of the gear set 12. The gear set 12 drives the pointer set 13 to operate to display the water consumption in liters. The gear set 12 controls the operation of the word wheel counter 14 to display the water consumption in cubic meters. The gear set 12 drives the coding disk 15 to rotate. The NB signal transmitting device 16 is used to receive the rotational changes of the coding disk 15, generate a digital signal representing the water consumption, and upload it.

[0040] In the embodiment of this application, the gear set 12 includes gears Z01, Z02, Z03, Z04, Z05, Z06, Z07, Z08, Z09, Z10, Z11, Z12, Z13, Z14, Z15, Z16, Z17, Z18, Z19.

[0041] Gear Z01 meshes with gear Z02, gear Z03 meshes with gear Z04, gear Z05 meshes with gear Z06, gear Z07 meshes with gear Z08, gear Z09 meshes with gear Z10, gear Z11 meshes with gear Z12, gear Z13 meshes with gear Z14, gear Z15 meshes with gear Z16, gear Z17 meshes with gear Z18, and gear Z05 meshes with gear Z19; Gear Z02 and gear Z03 are coaxial, gear Z04 and gear Z05 are coaxial, gear Z06 and gear Z07 are coaxial, gear Z08 and gear Z09 are coaxial, gear Z10 and gear Z11 are coaxial, gear Z12 and gear Z13 are coaxial, gear Z14 and gear Z15 are coaxial, gear Z16 and gear Z17 are coaxial.

[0042] The main shaft 11 is coaxial with gear Z01. The pointer group 13 includes four digit wheels. One digit wheel is coaxial with gear Z19, one digit wheel is coaxial with gear Z10, one digit wheel is coaxial with gear Z13, and one digit wheel is coaxial with gear Z18. A water flow indicating wheel 19 is coaxially connected to gear Z02. The coding disk 15 is coaxial with gear Z05. Gear Z18 is also coaxially connected with a worm gear. The digit wheel counter 14 is an existing mechanical counter with five digit wheels. The main shaft 11 of the digit wheel counter 14 is connected with a worm, and the worm meshes with the worm gear.

[0043] The gear set 12 and the digit wheel counter 14 are installed on an installation disk 18.

[0044] As Figure 3 、 Figure 4 and Figure 5 , it further includes an installation box 21, a flow sensor 22 and a rotation monitoring component 3. A control module 23, a power supply module 24, a control switch 25, a driving component 4 and a power generation component 5 are installed in the installation box 21; The driving component 4 is used to provide auxiliary driving when the impeller 17 does not respond to the water flow. The driving component 4 is connected to the control switch 25, the control switch 25 is connected to the control module 23, the control module 23 is connected to the power supply module 24. The flow sensor 22 is used to detect the change of water flow. The rotation monitoring component 3 is used to detect whether the impeller 17 rotates. The control module 23 is used to compare the change of water flow detected by the flow sensor 22 with the detection result of the rotation monitoring component 3. When it is detected that there is water flow but the impeller 17 does not rotate synchronously, the control module 23 controls the control switch 25 to close so that the driving component 4 drives the main shaft 11 to rotate. The power supply module 24 provides operating power for the driving component 4, the flow sensor 22 and the control module 23. The power generation component 5 is used to convert the kinetic energy of the rotation of the main shaft 11 into electric energy and store it in the power supply module 24; The flow sensor 22 is a wired transmission type MEMS flow sensor 22, specifically a MEMS thermal flow sensor 22 or a MEMS piezoresistive flow sensor 22. The control module 23 is an MCU module 231. The control switch 25 is a MOS switch tube 251. The driving power supply is a super capacitor 241.

[0045] As Figure 4, the drive assembly 4 includes a stator base 41 and a rotor base 42. The rotor base 42 is coaxially mounted on the main shaft 11 and sleeved inside the stator base 41. In the embodiment of the present application, the rotor base 42 is an annular permanent magnet, that is, it has only one S pole and one N pole. The stator base 41 is an annular sleeve composed of 4 iron cores, and each of the 4 iron cores is wound with a coil. The winding methods of adjacent coils are opposite, that is, when the coils are energized. In other embodiments, the specific design of the rotor base 42 and the stator base 41 can also be designed according to the structures of the rotor and the stator in a DC brushless motor.

[0046] Such as Figure 5 , the number of MOS switch tubes 251 is 4. Each MOS switch tube 251 is independently connected to a coil, and each MOS switch tube 251 is also connected to the MCU module 231. The MEMS flow sensor 22 is also connected to the MCU module 231. In other embodiments, the control module 23 can also be an existing module for receiving signals from an existing encoder and controlling the rotation of the motor.

[0047] Such as Figure 3 And Figure 5 , the power generation assembly 5 includes a driving gear 51 and a DC generator 53. The driving gear 51 is coaxially fixed on the main shaft 11. The DC generator 53 is connected with a driven gear 52. The driven gear 52 is rotatably arranged on the outer bottom wall of the installation box 21. The driving gear 51 meshes with the driven gear 52. The output end of the DC generator 53 is connected to the power module 24, and is used for generating electricity when the main shaft 11 rotates and supplying power to the supercapacitor 241.

[0048] Such as Figure 6 , the rotation monitoring assembly 3 includes a disk 31 and several Weigand sensors 33. The disk 31 is coaxially connected to the main shaft 11. The several Weigand sensors 33 are arranged equidistantly along the circumference of the disk 31. The output end of the Weigand sensor 33 is connected to the MCU module 231. The number of Weigand sensors 33 is 3.

[0049] Specifically, the installation box 21 is provided with a plurality of interfaces (not shown in the figure). The Weigand sensor 33, the coils of the stator base 41, and the flow sensor 22 are all inserted into the corresponding interfaces.

[0050] In order to avoid magnetic field interference between the rotor base 42 and the disk 31, affecting the normal rotation correction of the main shaft 11 and generating interference signals for the Weigand sensor 33, a partition (not shown) can be installed on the main shaft 11. The partition is located between the rotor base 42 and the disk 31, and the material of the partition is permalloy.

[0051] Such as Figure 6 And Figure 7, the implementation principle of the embodiment of this application is as follows: When the user turns on the water-using device, the water supply system generates water flow, and the water flow first enters the NB water meter and acts on the impeller 17. Under normal circumstances, the water flow impacts the impeller 17 and causes it to rotate. The impeller 17 drives the gear set 12 to rotate through the coaxial main shaft 11, and then drives the word pointer group 13 and the word wheel counter 14 to respectively achieve the mechanical display of the water consumption in liters and cubic meters. At the same time, the gear set 12 also drives the coding disk 15 to rotate. The rotation change of the coding disk 15 is sensed by the NB signal transmission device 16 in real time and converted into a digital signal, which is uploaded to the remote system to achieve data collection and monitoring.

[0052] By adopting the combination of "5-digit word wheel + 4-digit pointer", the decimal digit display of the red characters in the word wheel part is reduced, and the reading ambiguity and the probability of equipment misjudgment are reduced; at the same time, one more pointer display is added, so that the tiny flow can also be accurately indicated at the pointer level, avoiding the risk of missed counting caused by the low flow not driving the word wheel. This structural optimization significantly improves the recognition accuracy and the first-pass production qualification rate of the NB base meter during the first inspection, and enhances the performance stability and service life of the whole meter.

[0053] During the operation of the system, the flow sensor 22 monitors the water flow state in real time and transmits the detected flow signal to the MCU module 231. At the same time, the rotation monitoring component 3 is responsible for sensing the actual rotation state of the impeller 17 and sending a feedback signal of the rotation of the impeller 17 to the MCU module 231, that is Figure 7 the pulse signal shown.

[0054] When the flow sensor 22 monitors that there is water flow but the rotation monitoring component 3 does not feedback the rotation signal of the impeller 17, the control module 23 will judge that the current state is "tiny water flow and the impeller 17 does not rotate" (for example, when the detected water flow rate is 0.001 L / min and the MCU module 231 does not receive the pulse signal); At this time, the control module 23 will start timing from this abnormal state and record the cumulative drainage volume. If this state lasts for a certain period of time (such as 100 minutes), that is, the cumulative drainage volume reaches the measurement unit corresponding to the minimum scale of the word pointer group 13 (for example, 0.1 L), then the control module 23 will control the MOS switch tube 251 to close, the drive circuit is turned on, and the drive component 4 is activated to provide short-term rotational power for the main shaft 11, so that the corresponding minimum scale pointer in the pointer group 13 jumps one unit, realizing the physical measurement compensation for this tiny drainage volume (specifically, which or which MOS switch tubes 251 are started is determined according to the position of the S pole and N pole in the rotor seat 42 based on the previous pulse signal); If the abnormal state has not accumulated to the minimum measurement range (e.g., less than 100 minutes) and the impeller 17 resumes normal rotation, the MCU module 231 will record the currently accumulated water leakage and continue to monitor. When the subsequent accumulated water leakage reaches the minimum scale unit (e.g., 0.1 L), the corresponding MOS switch will also be triggered to close once (judging the positions of the S pole and N pole in the rotor seat 42 according to the pulse signal), driving the main shaft 11 to complete a compensation jump, and then immediately disconnecting the switch. Thus, "full-scale measurement" is achieved through the cooperation of software and hardware, ensuring that even under the smallest water flow conditions, water usage can be accurately recorded and uploaded, taking into account high precision, low power consumption, and high reliability.

[0055] Such as Figure 1 and Figure 9 In addition, an NB water meter is also disclosed in the embodiment of the present application. The NB water meter counter applied in the embodiment of the present application includes a housing 6. An upper mounting seat 7 is installed in the housing 6. A lower mounting seat 8 is bolted to the upper mounting seat 7. An installation disk 18 is installed in the upper mounting seat 7, that is, the gear set 12, the digit wheel set, and the pointer set 13 are all installed in the upper mounting seat 7. One end of the main shaft 11 is located in the upper mounting seat 7, and the other end is located in the lower mounting seat 8. The main shaft 11, the upper mounting seat 7, and the lower mounting seat 8 are coaxially arranged. The impeller 17 is located in the lower mounting seat 8. The lower mounting seat 8 is provided with a plurality of water passing holes 81. The flow sensor 22 is embedded in the inner wall of the water outlet of the housing 6, and the flow sensor 22 is waterproof encapsulated. An installation groove 71 is opened at the bottom of the upper mounting seat 7. The installation box 21 is located in the installation groove 71. An installation space 72 is reserved between the upper mounting seat 7 and the main shaft 11. The installation space 72 communicates with the installation groove 71. The upper mounting seat 7 is provided with a plurality of first wire passing holes 73 communicating with the installation space 72. The Wiegand sensor 33, the magnetic disk 31, the rotor seat 42, the stator seat 41, and the driving gear 51 are all located in the installation space 72. The Wiegand sensor 33 is attached to the inner wall of the upper mounting seat 7. The upper mounting seat 7 is also provided with a stepped block in its installation space 72. The stator seat 41 is supported on the stepped block. The coils of the Wiegand sensor 33 and the stator seat 41 are electrically connected to the installation box 21 through the first wire passing holes 73. A second wire passing hole 74 is opened on the outer side wall of the upper mounting seat 7. The flow sensor 22 is electrically connected to the installation box 21 through the second wire passing hole 74. The rotating shaft of the DC generator 53 passes through the installation box 21 and passes through the bottom wall of the installation groove 71. A sealing ring 75 is arranged in the upper mounting seat 7. The sealing ring 75 is sleeved on the main shaft 11 and is located below the installation space 72. A support ring 91 is threadedly connected to the housing 6. A dial 92 is hinged to the support ring 91. The NB signaling device 16 is installed on the support ring 91. By providing the installation space 72 between the upper mounting seat 7 and the main shaft 11 and integrating the rotation monitoring component 3 and the driving component 4 in the installation space 72, high integration is achieved.

[0056] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An NB water meter counter, comprising a main shaft (11), a gear set (12), a pointer set (13), a dial counter (14), a coding disk (15) and an NB signaling device (16). The main shaft (11) is coaxially connected with an impeller (17). The main shaft (11) controls the operation of the gear set (12). The gear set (12) drives the pointer set (13) to operate to display the water consumption in liters. The gear set (12) controls the operation of the dial counter (14) to display the water consumption in cubic meters. The gear set (12) drives the coding disk (15) to rotate. The NB signaling device (16) is used to receive the rotational change of the coding disk (15), generate a digital signal representing the water consumption and upload it. It is characterized in that: It further includes a flow sensor (22), a control module (23), a power supply module (24), a control switch (25), a rotation monitoring component (3) and a drive component (4); The drive component (4) is used to provide auxiliary drive when the impeller (17) does not respond to water flow. The drive component (4) is connected to the control switch (25), the control switch (25) is connected to the control module (23), the control module (23) is connected to the power supply module (24). The flow sensor (22) is used to detect water flow changes, the rotation monitoring component (3) is used to detect whether the impeller (17) rotates. The control module (23) is used to compare the water flow changes detected by the flow sensor (22) with the detection results of the rotation monitoring component (3). When it is detected that there is water flow but the impeller (17) does not rotate synchronously, the control module (23) controls the control switch (25) to close so that the drive component (4) drives the main shaft (11) to rotate. The power supply module (24) provides operating power for the drive component (4), the flow sensor (22) and the control module (23).

2. The NB water meter counter according to claim 1, characterized in that: It further includes a power generation component (5), and the power generation component (5) is used to convert the kinetic energy of the rotation of the main shaft (11) into electrical energy and store it in the power supply module (24).

3. The NB water meter counter according to claim 2, characterized in that: The drive component (4) includes a stator seat (41) and a rotor seat (42). The rotor seat (42) is coaxially installed on the main shaft (11) and sleeved inside the stator seat (41). The control switch (25) includes a plurality of MOS switch tubes (251). The coils of the stator seat (41) are in one-to-one correspondence and connected with the MOS switch tubes (251). The control module (23) is an MCU module (231). All the MOS switch tubes (251) are connected to the MCU module (231). The rotation monitoring component (3) is used to detect the angular position of the rotor seat (42) in real time and transmit the detection signal to the MCU module (231); The MCU module (231) controls the corresponding MOS switch tube (251) to conduct according to the current angular position of the rotor seat (42), so that part of the stator coil is energized to generate a rotating magnetic field in the stator seat (41), thereby driving the rotor seat (42) to rotate continuously; The power supply module (24) is a super capacitor (241).

4. The NB water meter counter according to claim 3, characterized in that: The rotation monitoring component (3) includes a disk (31) and a plurality of Wiegand sensors (33). The disk (31) is coaxially connected to the main shaft (11). The plurality of Wiegand sensors (33) are arranged equidistantly along the circumference of the disk (31). The output ends of the Wiegand sensors (33) are connected to the MCU module (231).

5. The NB water meter counter according to claim 4, characterized in that: The power generation component (5) includes a driving gear (51) and a DC generator (53). The driving gear (51) is coaxially fixed on the main shaft (11). The DC generator (53) is connected with a driven gear (52). The driving gear (51) meshes with the driven gear (52). The output end of the DC generator (53) is connected with the power supply module (24) and is used for generating electricity when the main shaft (11) rotates and supplying power to the power supply module (24).

6. The NB water meter counter according to claim 5, characterized in that: It further includes an installation box (21). The MCU module (231), the MOS switch tube (251), the DC generator (53), and the supercapacitor (241) are all installed in the installation box (21). The installation box (21) is provided with interfaces connected to the Weigand sensor (33) and the stator base (41). The driven gear (52) is rotatably connected to the installation box (21).

7. The NB water meter counter according to claim 1, characterized in that: The pointer group (13) includes 4 pointers. The digit wheel counter (14) includes 5 digit wheels. A water flow indicating wheel (19) is further connected to the gear group (12).

8. An NB water meter, characterized in that: The NB water meter counter according to claim 6, comprising a housing (6). An upper mounting seat (7) is installed in the housing (6). The upper mounting seat (7) is connected with a lower mounting seat (8). The gear group (12), the digit wheel counter (14), and the pointer group (13) are all installed in the upper mounting seat (7). One end of the main shaft (11) is located in the upper mounting seat (7), and the other end is located in the lower mounting seat (8). The impeller (17) is located in the lower mounting seat (8). The lower mounting seat (8) is provided with a plurality of water passing holes (81). The flow sensor (22) is installed at the water outlet of the housing (6). The bottom of the upper mounting seat (7) is provided with an installation groove (71). The installation box (21) is located in the installation groove (71). An installation space (72) is reserved between the upper mounting seat (7) and the main shaft (11). The upper mounting seat (7) is provided with a plurality of first wire passing holes (73) communicating with the installation space (72). The Weigand sensor (33), the magnetic disk (31), the rotor base (42), the stator base (41), and the driving gear (51) are all located in the installation space (72). The coils of the Weigand sensor (33) and the stator base (41) are electrically connected to the installation box (21) through the first wire passing holes (73). The rotating shaft of the DC generator (53) passes through the installation box (21) and passes through the bottom wall of the installation groove (71). A sealing ring (75) is arranged in the upper mounting seat (7). The sealing ring (75) is sleeved on the main shaft (11) and is located below the installation space (72).

9. The NB water meter according to claim 8, characterized in that: The flow sensor (22) adopts wired transmission. A second wire passing hole (74) is formed in the outer side wall of the upper mounting seat (7), and the flow sensor (22) is electrically connected to the mounting box (21) through the second wire passing hole (74).

10. The NB water meter according to claim 8, characterized in that: A support ring (91) is threadedly connected to the housing (6). A dial (92) is hinged to the support ring (91), and the NB signaling device (16) is installed on the support ring (91).

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