Intelligent water meter

Abstract

The utility model discloses an intelligent water meter with an electronic data acquisition mechanism and a water meter appearance direct-reading character wheel mechanism independent of each other. Comprising a base meter, the base meter is composed of a meter shell, a movement base, a counter assembly and a meter cover, a glass cover for sealing the counter assembly in the base meter is arranged between the meter cover and the movement base, the meter cover is provided with an external circuit module installed through a quick release structure, a concave cavity is formed in one side in a circuit board base of the external circuit module, and the counter assembly is arranged in the cavity. And a circuit board of the intelligent water meter is packaged in the cavity. The appearance form of the water meter is similar to that of a traditional product, and the water meter is easily accepted by users and is suitable for large-scale production and low in production cost; the device has good sealing and waterproof functions, and is high in adaptability to the installation environment. The external circuit module and the base meter adopt a quick-release building block type structure, so that the device is suitable for mechanical base meters with different calibers, is suitable for transformation and manufacturing, and is high in universality; the electronic mechanism and the direct reading mechanism are arranged independently, and the collected electronic metering data are continuous values.

Description

Technical Field

[0001] The utility model relates to an intelligent water meter, in particular to a wet direct-reading water meter for the Internet of Things. Background Art

[0002] The existing wet direct-reading remote transmission water meter usually includes a digital and pointer counter assembly and a magnetic coupling acquisition circuit for collecting the data of the digit wheels in the digital counter group. The counter assembly is immersed in the water inside the meter housing. A waterproof plate is provided inside the meter housing, and the magnetic coupling acquisition circuit is arranged on the waterproof plate in a waterproof and sealed manner. Then, the counter assembly and the magnetic coupling acquisition circuit are encapsulated together in a water meter cavity with a glass cover. This structure has the following defects:

[0003] 1. When the magnetic coupling acquisition circuit has problems and needs to be repaired or replaced, it is not convenient to disassemble and assemble.

[0004] 2. During the process of standardizing the management of water meters, it is necessary to regularly disassemble and assemble the water meters for detection or update. However, in the above structure, the magnetic coupling acquisition circuit is usually fixed in the meter housing by sealing glue, which is not conducive to disassembly for regular management. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an intelligent water meter in which the electronic data acquisition mechanism and the apparent direct-reading digit wheel mechanism of the water meter are independent of each other.

[0006] To solve the above technical problem, the utility model adopts the following technical solutions:

[0007] The intelligent water meter of the utility model includes a basic meter, and the basic meter is composed of a meter housing, a movement seat, a counter assembly and a meter cover. A glass cover for sealing the counter assembly in the basic meter is provided between the meter cover and the movement seat. It is characterized in that the counter assembly includes a pointer counter assembly and a digital counter assembly. An external circuit module installed through a quick-release structure is provided on the meter cover. A sunken cavity is provided on one side inside the circuit board seat of the external circuit module. The circuit board for collecting the water meter measurement data and communicating and transmitting the data is encapsulated in this cavity. The external module includes a circuit board seat, the circuit board and a cover.

[0008] In the narrow space between the upper clamping plate and the lower clamping plate of the counter assembly and outside the digit wheel group, a set of gear transmission mechanisms are arranged along the peripheral direction of the upper clamping plate. The starting gear of the gear transmission mechanism meshes with the transmission gear corresponding to one-tenth of the measurement value of the pointer measurement assembly. The end gear of the gear transmission mechanism is the unit far transmission gear corresponding to the unit measurement value.

[0009] At the end of the gear transmission mechanism, a second set of gear transmission mechanisms arranged along the peripheral direction of the upper clamping plate is further provided. The starting gear of the second set of gear transmission mechanisms meshes with the unit remote transmission gear, and the end of the second set of gear transmission mechanisms is the tens remote transmission gear corresponding to the tens measurement value.

[0010] At the end of the second set of gear transmission mechanisms, a third set of gear transmission mechanisms arranged along the peripheral direction of the upper clamping plate is further provided. The starting gear of the third set of gear transmission mechanisms meshes with the tens remote transmission gear, and the end of the third set of gear transmission mechanisms is the hundreds remote transmission gear corresponding to the hundreds measurement value.

[0011] At the upper end of the gear shaft of the unit remote transmission gear, the tens remote transmission gear and / or the hundreds remote transmission gear, a shaft end seat made of plastic is provided. A magnetic sheet is provided in the central concave position of the shaft end seat. In the annular groove outside the magnetic sheet, an anti-magnetic ring for preventing the external magnetic field from interfering with the magnetic field generated by the magnetic sheet is provided. Correspondingly, an angular displacement sensor is provided at the position on the circuit board corresponding to the magnetic sheet up and down. The angular displacement sensor is electrically connected to the remote transmission control circuit on the circuit board.

[0012] Beside the smallest value gear corresponding to the ten-thousandth measurement value in the pointer type measurement assembly, a warning gear for monitoring sudden changes in the user's daily water consumption habits is provided. A circular warning turntable is sleeved on the upper end of the gear shaft. A magnetic block is provided on the side of the warning turntable. Correspondingly, a magnetic sensor is provided at the position on the circuit board corresponding to the magnetic block up and down. The magnetic sensor is electrically connected to the remote transmission control circuit on the circuit board.

[0013] Compared with the prior art, the intelligent water meter of the present invention has the following advantages: The appearance form of the water meter of the present invention is similar to that of traditional products, which is easy for users to accept, suitable for large-scale production, and has low production costs; The circuit board for collecting electronic data is encapsulated with potting glue, which has good sealing and waterproof functions and strong adaptability to the installation environment; Its external circuit module and the basic meter adopt a quick-release building block structure, which is suitable for mechanical basic meters of different calibers, and is suitable for both transformation and manufacturing, with strong versatility; The electronic mechanism and the direct reading mechanism are set independently of each other, and the collected electronic measurement data is a continuous value. Brief Description of the Drawings

[0014] Figure 1 is a schematic diagram of the intelligent water meter of the present invention.

[0015] Figure 2 is Figure 1 the exploded and reduced schematic diagram of

[0016] Figure 3 is Figure 2 the schematic diagram of the circuit board seat in

[0017] Figure 4 is Figure 2 a schematic diagram showing the counter component in

[0018] Figure 5 is Figure 4 a plan view after removing the upper clamping plate.

[0019] Figure 6 is Figure 5 an enlarged schematic diagram of the warning gear in

[0020] Figure 7 is Figure 5 an enlarged schematic diagram of the unit-digit remote transmission gear.

[0021] Figure 8 is Figure 5 an enlarged schematic diagram of the ten-digit remote transmission gear.

[0022] Figure 9 is Figure 5 an enlarged schematic diagram of the hundred-digit remote transmission gear.

[0023] Reference numerals

[0024] Base meter 1, meter case 11, movement base 12, glass face cover 13, lock pin hole 131, accommodation cavity 132, meter cover 14, counter component 2, upper clamping plate 21, lower clamping plate 22, pointer counter 23, plum wheel 24, window of digital counter 25, unit-digit remote transmission gear 31, ten-digit remote transmission gear 32, hundred-digit remote transmission gear 33, warning gear 4, warning turntable 41, magnetic block 42, shaft end seat 5, groove 51, anti-magnetic ring 52, magnetic sheet 53, external circuit module 6, circuit board seat 61, cavity 62, positioning post 63, cover 64, water meter cover 65, circuit board 7, angular displacement sensor 71, positioning hole 72, magnetic sensor 73, intelligent water meter 100. Detailed implementation manners

[0025] I. General situation

[0026] As Figures 1-4 shown, the intelligent water meter 100 of the present utility model is composed of a base meter 1 and an external circuit module 6. The base meter 1 can be used alone and can be used as a wet direct-reading water meter for measuring water consumption data. The external circuit module 6 is a module that collects and transmits electronic data through magnetic coupling with the magnetic sheet 53 installed in the base meter 1.

[0027] The base meter 1 includes a watch case 11 (with a water inlet and a water outlet provided on the watch case 11, and the upper end face of the watch case 11 is open), a movement seat 12, a counter assembly 2, a glass face cover 13 (not shown in the figure), and a watch cover 14. Among them, the counter assembly 2 includes a water meter apparent direct reading mechanism (hereinafter referred to as the direct reading mechanism, including a pointer type counter 23 and a digital counter) and a counting module in an electronic data acquisition mechanism (hereinafter referred to as the electronic mechanism).

[0028] The external circuit module 6 includes a circuit board seat 61, a circuit board 7, a cover 64, and a water meter cover 65.

[0029] The counter assembly 2 is installed in the movement seat 12, and the circuit board 7 in the electronic mechanism for collecting water meter measurement data and communicating and transmitting this data is encapsulated on the circuit board seat 61.

[0030] During installation, first assemble the movement seat 12 with the counter assembly 2 in the watch case 11 and fix it. A sealing ring for preventing water leakage in the watch case 11 is placed between the glass face cover 13 and the movement seat 12. Then, install the circuit board seat 61 with the circuit board 7 on the watch cover 14 through a quick-release structure and tighten and lock it. After that, buckle the cover 64 on the circuit board seat 61 and lead out the wire connected to the circuit board 7. Finally, buckle the water meter cover 65 on the cover 64.

[0031] The above structure has the following advantages:

[0032] 1. When it is necessary to repair or replace the circuit board 7 or the counter assembly 2, only need to unlock and separate the external circuit module 6 from the base meter 1.

[0033] 2. Since the external circuit module 6 and the base meter 1 are connected together by a quick-disassembly and assembly structure, when it is necessary to incorporate the water meter system into the standardized management system for management, it is necessary to regularly disassemble and assemble and detect or update each water meter, and the above structure greatly facilitates management and reduces management costs.

[0034] 3. The above structure can perform on-line maintenance on the circuit board 7 of the water meter in use without affecting the normal operation of the base meter 1, which is the first in wet direct reading remote transmission water meters.

[0035] II. Base meter 1

[0036] 1. Watch case 11

[0037] It is made of copper, ductile iron, plastic or stainless steel, and a water flow direction indication mark is provided on the outer side surface of the watch case 11.

[0038] 2. Movement seat 12

[0039] Below the movement base 12, there is an impeller assembly and an impeller cover. The upper end of the impeller shaft of the impeller assembly is inserted into the counter assembly 2 and transmits power to the counter assembly 2.

[0040] 3. Watch case 14

[0041] Preferably made of stainless steel, it is a cylinder with a circular crimping edge. There is a thread on the inner side of the cylinder, which can be threadedly connected to the thread on the outer side wall of the upper port of the watch case 11.

[0042] 4. Glass face cover 13

[0043] The glass face cover 13 is made of plexiglass. It is arranged inside the cylinder and abuts against the inner side of the circular crimping edge. There is a sealing ring around the glass face cover 13 to prevent water in the watch case 11 from leaking out.

[0044] On the top edge side of the glass face cover 13, there is a blind hole, which will be referred to as the lock pin hole 131 below.

[0045] On the inner side surface of the glass face cover 13, there are four receiving cavities 132 recessed towards the inside of the face cover. On the side wall of the glass face cover 13, there are several snap notches and snap grooves.

[0046] There is a positioning structure between the periphery of the glass face cover 13 and the upper port of the movement base 12 to prevent the glass face cover 13 from rotating freely.

[0047] 5. Counter assembly 2

[0048] As Figure 2 、 Figure 4 and Figure 5 shown, the counter assembly 2 includes an upper clamping plate 21 and a lower clamping plate 22. The direct reading mechanism and the electronic mechanism are arranged between the upper clamping plate 21 and the lower clamping plate 22.

[0049] 1) Upper clamping plate 21

[0050] On one side area of the top surface of the upper clamping plate 21, there is a pointer type counter 23, which are dials and corresponding pointers for measuring one tenth, one hundredth, one thousandth and ten thousandth cubic meters respectively. Each pointer is connected to the low gear transmission mechanism through a corresponding gear shaft (this solution is prior art). The gear of ten thousandth cubic meters is connected to the impeller gear through the impeller gear transmission mechanism.

[0051] In the middle area of the upper clamping plate 21, there is a plum wheel 24 that can display whether the impeller rotates.

[0052] On the other side area of the top surface of the upper clamping plate 21, there is a window 25 for displaying a digital counter. The word wheel group in the digital counter displays quantity levels including units, tens, hundreds, thousands and ten thousands of cubic meters.

[0053] The remote transmission gear assemblies in the electronic mechanism are arranged around the periphery of the other side area on the top surface of the upper clamping plate 21. Preferably, three remote transmission gear assemblies are provided in the present utility model, which are respectively used for collecting data of single cubic meters, tens of cubic meters, and hundreds of cubic meters. The three remote transmission gear assemblies are arranged at a certain distance to avoid mutual interference.

[0054] A warning turntable 41 for monitoring sudden changes in the user's daily water consumption habits is provided at the side position of the upper clamping plate 21 near the one-ten-thousandth cubic meter dial. The warning turntable 41 is circular and made of plastic.

[0055] 2) Direct reading mechanism

[0056] The pointers in the pointer-type counter 23 are meshed and connected to each other through corresponding low-position gear transmission mechanisms. Among them, the gear corresponding to the one-tenth pointer is meshed with the driven tooth teeth on the low-position side surface of the single-digit wheel in the wheel set through a worm gear.

[0057] In the wheel set, the surface of the adjacent two low-position wheels opposite to the high-position wheel is called the high-position side surface of the low-position wheel, and the surface of the high-position wheel opposite to the low-position wheel is called the low-position side surface of the high-position wheel.

[0058] Twenty driven tooth teeth are evenly spaced around the periphery of the low-position side surface of each wheel. Two driving tooth teeth are provided on the high-position side surface of the wheel. When the low-position wheel rotates one week, the driving gear on the high-position side surface of the low-position wheel drives the driven tooth on the low-position side surface of the high-position wheel to advance one position through a 48-tooth gear.

[0059] 3) Electronic mechanism

[0060] The electronic mechanism is composed of the circuit board 7 and the counting module, and the counting module includes three of the remote transmission gear assemblies.

[0061] a. Remote transmission gear assembly

[0062] The three remote transmission gear assemblies are arranged in the narrow space between the upper clamping plate 21 and the lower clamping plate 22 and outside the wheel set. A set of gear transmission mechanisms are arranged along the periphery of the upper clamping plate 21. This setting can separate the counting of the electronic mechanism from the counting of the direct reading mechanism, and the counting data of the electronic mechanism can be continuously collected.

[0063] The direct reading mechanism is a set of digit wheels. Carry is achieved among the digit wheels through a 48-tooth gear. On the side of the 48-tooth gear that is connected to the high-order digit wheel, all the teeth are flush, and they mesh with the driven teeth of the high-order digit wheel. On the other side of the 48-tooth gear that is connected to the low-order digit wheel, the teeth are one long and one short. When the low-order digit wheel rotates from the number 9 to 0, the low-order digit wheel is always in a continuous rotation state, while the number to be carried on the high-order digit wheel is displayed in a jumping manner for carry. The reason is that as the water flow continues, there is inevitably a distance allowance before the active tooth and the long tooth mesh and collide during the preparation for carry, resulting in a very short time when the digit wheel set does not respond. After the active tooth and the long tooth mesh, the number is displayed in a jumping manner, causing a short-term inconsistency between the actual flow rate and the intuitive reading.

[0064] After the counting of the electronic mechanism and the counting of the direct reading mechanism of the present utility model are separately arranged, the collected electronic data can be a continuous value.

[0065] The following separately introduces three preferred remote transmission gear sets:

[0066] ● The unit remote transmission gear set for collecting unit cubic meter data

[0067] As Figure 5 、 7 shown, the unit remote transmission gear set includes a unit remote transmission gear 31 and a unit intermediate gear set. Preferably, the present utility model has one unit intermediate gear set. The disk teeth of this unit intermediate gear mesh with the transmission gear corresponding to one-tenth of the measurement value of the pointer-type metering component, and the shaft teeth of this unit intermediate gear mesh with the upper disk teeth of the unit remote transmission gear 31.

[0068] At the upper end of the gear shaft of the unit remote transmission gear 31, a shaft end seat 5 made of plastic is inserted. A magnetic sheet 53 is provided in the central concave position of the shaft end seat 5. In the annular groove 51 outside the magnetic sheet 53, an anti-magnetic ring 52 for preventing the external magnetic field from interfering with the magnetic field generated by the magnetic sheet 53 is provided. Correspondingly, at the position on the circuit board 7 that corresponds to the magnetic sheet 53 up and down, an angular displacement sensor 71 that is magnetically coupled to the magnetic sheet 53 is provided. The angular displacement sensor 71 is electrically connected to the remote transmission control circuit on the circuit board 7.

[0069] ● The tens remote transmission gear set for collecting tens cubic meter data

[0070] As Figure 5 、 8 shown, the tens remote transmission gear set includes a tens remote transmission gear 32 and a tens intermediate gear set. Preferably, the present utility model has three intermediate gears in the tens intermediate gear set. The first intermediate gear meshes with the lower disk teeth of the unit remote transmission gear 31, the three intermediate gears mesh in sequence, and the third intermediate gear meshes with the upper disk teeth of the tens remote transmission gear 32.

[0071] At the upper end of the gear shaft of the tens remote transmission gear 32, there is also a shaft end seat 5 with the same structure as the shaft end seat 5 at the shaft end of the units remote transmission gear. On this shaft end seat 5, there are also the same magnetic sheet 53 and anti-magnetic ring 52. Correspondingly, on the circuit board 7, there is also an angular displacement sensor 71 that is magnetically coupled to the magnetic sheet 53 of the tens remote transmission gear 32.

[0072] ● The hundreds remote transmission gear set for collecting hundreds of cubic meters of data

[0073] Such as Figure 5 、 9 As shown, the hundreds remote transmission gear set includes a hundreds remote transmission gear 33 and a hundreds intermediate gear set. Preferably, in the present utility model, the hundreds intermediate gear set is three intermediate gears. The first intermediate gear meshes with the lower disc teeth of the tens remote transmission gear 32, the three intermediate gears mesh in sequence, and the third intermediate gear meshes with the hundreds remote transmission gear 33.

[0074] At the upper end of the gear shaft of the hundreds remote transmission gear 33, there is also a shaft end seat 5 with the same structure as the shaft end seat 5 at the shaft end of the units remote transmission gear. On this shaft end seat 5, there are also the same magnetic sheet 53 and anti-magnetic ring 52. Correspondingly, on the circuit board 7, there is also an angular displacement sensor 71 that is magnetically coupled to the magnetic sheet 53 of the hundreds remote transmission gear 33.

[0075] When the glass face cover 13 is placed on top of the counter assembly 2, the three shaft end seats 5 are received in the corresponding receiving cavities 132.

[0076] b. Circuit board 7

[0077] The circuit board 7 is installed in a sunken cavity 62 on one side provided inside the base

[0078] This circuit board 7 is used to collect the measurement data of the three remote transmission gears and transmit this data to the water service system management platform by wire or wirelessly.

[0079] The angular displacement sensors 71 corresponding to the three remote transmission gears are installed at the set positions on this circuit board 7.

[0080] There are also several positioning holes 72 on the circuit board 7.

[0081] 4) Warning turntable 41

[0082] Such as Figure 5 、 6 As shown, beside the smallest quantity value gear corresponding to the ten-thousandth measurement value in the pointer type measurement assembly, there is a warning gear 4 that can monitor sudden changes in the user's daily water consumption habits. The sudden changes include, but are not limited to: continuous small flow records caused by water leakage in the pipeline; the user's water consumption fluctuates constantly, and suddenly there is no flow record for a certain period of time starting from a certain day, and an abnormal prompt can be sent to the management platform.

[0083] The warning gear 4 meshes with the minimum value gear at a transmission ratio of 1:1.

[0084] At the upper end of the shaft of the warning gear 4, a circular warning turntable 41 is sleeved. On the side of the warning turntable 41, a magnetic block 42 is provided. Correspondingly, at a position on the circuit board 7 that is vertically corresponding to the magnetic block 42, a magnetic sensor 73 is provided. The magnetic sensor 73 is electrically connected to the remote control circuit on the circuit board 7.

[0085] When the glass face cover 13 covers the counter assembly 2, the warning turntable 41 is accommodated in the corresponding accommodation cavity 132, and there is a gap between the warning turntable 41 and the inner wall of the accommodation cavity 132.

[0086] III. External circuit module 6

[0087] 1. Circuit board seat 61

[0088] The circuit board seat 61 is an integrally formed injection molded part, and its shape is a ring-shaped cylinder. At the upper port of the inner side of the cylinder, a partition is provided. The outer side of the partition is integrally connected to the cylinder wall. Inside the partition, an inner wall in a "C" shape is provided. The recess formed by enclosing the inner wall and the cylinder wall is the cavity 62 for installing the circuit board 7. In the cavity 62, there are positioning posts 63 with the same number as the positioning holes 72 on the circuit board 7. The circuit board 7 is fixed in the cavity 62 in a way that the positioning holes 72 on it are buckled with the positioning posts 63 one by one, and the fixing method can be using screws or sealing glue.

[0089] On the other side opposite to the partition, there is a hollow for observing the direct reading mechanism.

[0090] When the circuit board seat 61 is installed on the base meter 1, the angular displacement sensor 71 on the circuit board 7 can collect the rotation angle of the magnetic sheet 53 on the corresponding remote transmission gear in real time.

[0091] The quick-release structure consists of a clamping block provided on the inner side of the circuit board seat 61, a snap-in notch and a snap-in groove provided on the side wall of the glass face cover 13. When it is necessary to fix the circuit board seat 61 on the meter cover 14, the clamping block first falls into the snap-in notch, and by rotating the circuit board seat 61, the clamping block is snapped into the snap-in groove, so that the circuit board seat 61 and the base meter 1 are fixedly connected together.

[0092] The locking mechanism consists of a lock pin hole 131 provided on the surface of the glass face cover 13, a through hole and a pin provided on the side of the circuit board seat 61. When the circuit board seat 61 and the base meter 1 are fixed together, only by passing the pin through the through hole and the lock pin hole 131 can the circuit board seat 61 and the base meter 1 be locked to prevent free rotation caused by the vibration of the water meter during use.

[0093] 2. Circuit board 7 (see the above description for details)

[0094] 3. Cover 64

[0095] The cover 64 is an integrally formed injection molded part, and a plurality of ear plates with through holes are provided on its peripheral wall. Correspondingly, the same number of threaded holes are provided on the peripheral wall of the circuit board seat 61. The cover 64 can be fixed to the circuit board seat 61 by inserting screws into the through holes.

[0096] A cover plate that can seal the cavity 62 is provided in the area of the cover 64 opposite to the cavity 62 on the circuit board 7.

[0097] The position of the cover 64 opposite to the hollow area on the circuit board seat 61 is also hollow.

[0098] 4. Water meter cover 65

[0099] The water meter cover 65 is hinged to the cover 64 by screws passing through the threaded holes provided in the cover plate, so that the water meter cover 65 closes the hollow area in a one-sided opening or closing manner.

Claims

1. An intelligent water meter, comprising a base meter (1), the base meter (1) being composed of a meter housing (11), a movement base (12), a counter assembly (2) and a meter cover (14). A glass cover for sealing the counter assembly (2) inside the base meter (1) is provided between the meter cover (14) and the movement base (12). It is characterized in that, The counter assembly (2) includes a pointer counter and a digital counter. An external circuit module (6) installed through a quick-release structure is provided on the watch cover (14). A recessed cavity (62) is provided on one side inside the circuit board base (61) of the external circuit module (6). The circuit board (7) of the intelligent water meter (100) for collecting water meter measurement data and communicating and transmitting the data is encapsulated in the cavity (62). The external circuit module (6) includes a circuit board base (61), the circuit board (7), and a cover (64).

2. The intelligent water meter according to claim 1, characterized in that In the narrow space between the upper clamping plate (21) and the lower clamping plate (22) of the counter assembly (2) and outside the word wheel group, a set of gear transmission mechanisms are arranged along the peripheral direction of the upper clamping plate (21). The starting gear of the gear transmission mechanism meshes with the transmission gear corresponding to one-tenth of the measurement value of the pointer measurement assembly. The end gear of the gear transmission mechanism is the unit far-transmission gear (31) corresponding to the unit measurement value.

3. The intelligent water meter according to claim 2, wherein At the end of the gear transmission mechanism, a second set of gear transmission mechanisms arranged along the peripheral direction of the upper clamping plate (21) is further provided. The starting gear of the second set of gear transmission mechanisms meshes with the unit far-transmission gear (31). The end of the second set of gear transmission mechanisms is the tens far-transmission gear (32) corresponding to the tens measurement value.

4. The intelligent water meter according to claim 3, characterized in that, At the end of the second set of gear transmission mechanisms, a third set of gear transmission mechanisms arranged along the peripheral direction of the upper clamping plate (21) is further provided. The starting gear of the third set of gear transmission mechanisms meshes with the tens far-transmission gear (32). The end of the third set of gear transmission mechanisms is the hundreds far-transmission gear (33) corresponding to the hundreds measurement value.

5. The intelligent water meter according to any one of claims 2-4, characterized in that, At the upper end of the gear shaft of the unit far-transmission gear (31), the tens far-transmission gear (32), and / or the hundreds far-transmission gear (33), a shaft end seat (5) made of plastic is provided. A magnetic sheet (53) is provided in the central concave position of the shaft end seat (5). An anti-magnetic ring (52) for preventing the external magnetic field from interfering with the magnetic field generated by the magnetic sheet (53) is provided in the annular groove (51) outside the magnetic sheet (53). Correspondingly, an angular displacement sensor (71) is provided at the position on the circuit board (7) corresponding to the magnetic sheet (53) up and down. The angular displacement sensor (71) is electrically connected to the far-transmission control circuit on the circuit board (7).

6. The intelligent water meter according to claim 5, characterized in that, Beside the smallest value gear corresponding to one ten-thousandth of the measurement value in the pointer measurement assembly, a warning gear (4) for monitoring sudden changes in the user's daily water consumption habits is provided. A circular warning turntable (41) is sleeved on the upper end of the gear shaft. A magnetic block (42) is provided on the side of the warning turntable (41). Correspondingly, a magnetic sensor (73) is provided at the position on the circuit board (7) corresponding to the magnetic block (42) up and down. The magnetic sensor (73) is electrically connected to the far-transmission control circuit on the circuit board (7).

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