CN214544507U - Automatic meter reading device for mechanical water meter - Google Patents

Abstract

The utility model relates to the technical field of mechanical water meters, and discloses an automatic meter reading device for a mechanical water meter, which comprises a connecting cover, a fastening ring and a meter reading device connected with the mechanical water meter through the connecting cover and the fastening ring, wherein the meter reading device comprises a shell, a micro camera, a light-compensating LED lamp, a water sensor, a control circuit board and a power module for supplying power; the wide ring of outside protrusion in connecting cover upper end, the tighrening ring internal diameter slightly is greater than connecting cover lower extreme external diameter and is less than the wide ring external diameter in connecting cover upper end, the tighrening ring inner wall sets up the internal thread, and the casing lower extreme sets up step-like external thread joint, and the tighrening ring internal thread matches with the step-like external thread joint screw thread of casing lower extreme, and the connecting cover sets up the internal thread, and it matches with the external screw thread on the mechanical water gauge. Compared with the prior art, the utility model discloses strong adaptability only changes the copper sheathing on the original mechanical water gauge to have state monitoring, install fast, maintain convenient characteristics, satisfy artifical and automatic requirement of checking meter simultaneously.

Description

Automatic meter reading device for mechanical water meter

Technical Field

The utility model relates to a mechanical water meter technical field, concretely relates to automatic device of checking meter of mechanical water meter.

Background

With the rapid development of information communication technology and the continuous maturity of internet of things technology, the traditional manual meter reading mode of water affairs industry is gradually replaced by remote automatic meter reading. One scheme of the automatic meter reading mode is to adopt an electronic water meter with an automatic meter reading function, and the other scheme is to attach a meter reading device to a traditional mechanical water meter to realize remote automatic meter reading. In the electronic water meter used at present, a mechanical part and an electronic part are positioned in the same shell, and when water leakage or other faults occur, the data cannot be read and the whole water meter needs to be detached for maintenance. Meanwhile, the mechanical water meter has huge reserve and high replacement cost, so that the remote automatic meter reading of the mechanical water meter is realized by adding an automatic meter reading device within a period of time.

The water meter is usually installed indoors, outdoors or underground along a pipeline, the use environment is complex, and particularly the severe environment of long-term moisture and even accumulated water in an underground water meter well, so that an additional automatic meter reading device is required to have a waterproof function. An additional intelligent telemetering water meter reading device (CN 108051043A) convenient for field installation changes the height of an imaging path reduction device of a digital disk by embedding a prism coated with a reflecting aluminum film, solves the problems that the device cannot be installed in a water meter box due to the height and the like, but does not consider installation in severe environments with water immersion and the like. The utility model provides a water gauge is far passed to novel intelligence (CN 111765940A), passes through the screw thread with the water gauge and is connected with the connection lock mother, and the connection lock mother passes through clamp and screw connection with the connection mainboard of the device of checking meter, though can lock automatically, but the clamp fixed mode can not accomplish complete water-proof.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the problem that exists among the prior art, the utility model provides an automatic device of checking meter of mechanical water gauge to have waterproof, state monitoring, install fast, maintain convenient characteristics, satisfy artifical and the automatic requirement of checking meter simultaneously.

The technical scheme is as follows: the utility model provides an automatic meter reading device of a mechanical water meter, which is applied to the mechanical water meter and comprises a connecting cover, a fastening ring and a meter reading device connected with the mechanical water meter through the connecting cover and the fastening ring, wherein the meter reading device comprises a shell, a micro camera, a light-compensating LED lamp, a water sensor, a control circuit board and a power module for supplying power;

the miniature camera is arranged in the shell and is right opposite to the mechanical water meter character code area, and the miniature camera, the light supplement LED lamp and the water immersion sensor are connected with the control circuit board through circuits;

the outside wide ring of protrusion in connecting cover upper end, the tighrening ring internal diameter slightly is greater than connecting cover lower extreme external diameter is less than the wide ring external diameter in connecting cover upper end, the tighrening ring inner wall sets up the internal thread, the casing lower extreme sets up step form attach fitting, the tighrening ring internal thread with the step form attach fitting screw thread of casing lower extreme matches, the connecting cover sets up the internal thread, and it matches with the external screw thread on the mechanical water gauge.

Furthermore, a plurality of lead sealing handles are arranged on the outer wall of the connecting cover at intervals, and notches are formed in the positions, corresponding to the lead sealing handles, of the lower end of the inner wall of the fastening ring.

Further, the outer wall of the fastening ring is also provided with a pair of fastening handles.

Further, a groove is formed in the wide circular ring, and a first sealing ring is arranged in the groove.

Furthermore, the upper end of the shell is provided with a step-shaped external thread joint, a second sealing ring is placed on the step-shaped external thread joint, and the upper end of the shell is in threaded connection with a top cover made of transparent materials.

Furthermore, a protective cover is rotatably connected to the top cover.

Furthermore, the control circuit board comprises an upper circuit board and a lower circuit board, the upper circuit board and the lower circuit board are both arranged in the shell, a camera chip interface, a water immersion signal chip interface, an LED lamp interface and a power conditioning circuit are arranged on the upper circuit board, the lower circuit board is provided with a micro-processing chip and a storage chip, the micro-processing chip is connected with the storage chip, and the micro-processing chip is connected with the micro camera and the water immersion sensor through the camera chip interface and the water immersion signal chip interface; the light supplementing LED lamp is connected with the micro-processing chip through an LED lamp interface; the upper circuit board is connected with the lower circuit board through a flat cable.

Furthermore, the power module is a U-shaped soft package lithium battery and is connected with each circuit module through a power conditioning circuit.

Further, still be provided with 485 communication interface on the lower circuit board, the microprocessor chip passes through 485 communication interface and is connected with communication module, communication module and host computer connection.

Furthermore, a clock chip is arranged on the lower circuit board and connected with the micro-processing chip through an interface.

The utility model discloses the method of checking meter of automatic device of checking meter of mechanical water gauge does:

s1: timing and reading the meter, namely controlling to start a light supplement LED lamp and obliquely shoot a micro camera when the clock chip reaches the preset meter reading time according to the preset meter reading time in the micro processing chip, performing trapezoidal correction on the graph by the micro processing chip, performing digital identification on the corrected graph, and automatically checking the identification result;

s2: the communication meter reading method comprises the steps that communication meter reading is conducted, when an upper computer sends a meter reading request through a communication interface, the communication interface sends the meter reading request to a micro-processing chip, the micro-processing chip controls to turn on a light supplement LED lamp and a micro camera to shoot obliquely, the micro-processing chip conducts trapezoidal correction on a graph, then digital recognition is conducted on the corrected graph, and meanwhile automatic inspection is conducted on a recognition result;

s3: when the water immersion sensor receives a water immersion signal, the microprocessor chip controls the light supplement LED lamp and the micro camera to be started for oblique photographing, and uploads a picture and a fault alarm signal to the upper computer and stores the picture and the fault alarm signal in the storage chip;

s4: according to the identification results of the steps S1 to S2, if the identification result is lower than the last meter reading result, an error signal is output, and the identification is carried out again; if the errors are identified for 5 times continuously, shooting again for re-identification, successfully identifying, storing the indicating result, the picture and the shooting time parameter of the mechanical water meter into a storage chip and uploading the storing result, the picture and the shooting time parameter to an upper computer; if the continuous 5 times of repeated shooting identification is unsuccessful, marking the number as abnormal, and storing the picture and the shooting time parameter into a storage chip and uploading the picture and the shooting time parameter to an upper computer by a microprocessing chip;

s5: and when the meter reading is finished or the abnormal alarm is finished, the microprocessor controls to turn off the light supplement LED lamp (213), and the meter reading and the fault alarm are finished.

Has the advantages that:

1. the utility model discloses change the copper sheathing of original mechanical water gauge top into connecting cover and tighrening ring to be connected with the device of checking meter through connecting cover and tighrening ring, at first need not change existing mechanical water gauge structure, only need change the copper sheathing of original mechanical water gauge top, utilize the casing of connecting cover and tighrening ring threaded connection device of checking meter, it is convenient fast to install. The automatic meter reading device has the advantages that the miniature camera and the light supplementing LED lamp which are arranged in the meter reading device are used for shooting pictures to carry out meter reading work, and the automatic meter reading function is realized. And the utility model discloses according to the water sensor, be convenient for constantly monitor its state of intaking to installing in the mechanical water gauge that has adverse circumstances such as ponding, when the water sensor sent the water logging signal, start miniature camera and shoot and carry out image recognition to the water gauge whether intake etc. unusual, or the discovery has abnormal conditions when carrying out water gauge word image recognition, sends unusual through communication interface and reports an emergency and asks for help or increased vigilance. And the utility model discloses when the installation, with the external screw thread threaded connection of tighrening ring and casing lower extreme, connecting cover and mechanical water meter threaded connection, the connecting cover is fixed through wide ring and tighrening ring block moreover, is convenient for to be connected automatic device and current mechanical water meter of checking meter, can not drop.

2. The utility model discloses set up the breach at tighrening ring lower extreme inner wall, can effectively avoid the lead sealing handle of connecting cover. And the outer wall of the fastening ring is provided with a fastening handle, so that the fastening ring is conveniently connected with the lower end of the shell.

3. The utility model discloses set up the recess on the wide ring in connecting cover upper end and place first sealing washer in the recess, when being connected through tighrening ring and casing like this, utilize the mechanical water gauge of first sealing washer seal shell and below, water can not play waterproof effect in getting into the mechanical water gauge from the gap between connecting cover and the casing.

4. The utility model discloses utilize transparent top cap to revolve to twist above the automatic device casing of checking meter, can also realize manual checking meter when realizing automatic checking meter, look over mechanical water meter numerical value through the transparent top cap on the casing. And the second sealing washer that sets up between top cap and casing can play waterproof function, prevents that water and dust from getting into, satisfies the digital requirement of shooting the water gauge of making a video recording. Can play the guard action to automatic device of checking meter through the protection casing, prevent to have the stone to fall and cause the damage to it in the use.

5. The utility model discloses set up trapezoidal correction algorithm in control circuit board's the micro-processing chip, shoot the photo through miniature camera head, utilize the algorithm to carry out digital identification and autoverification, accomplish the automatic function of checking meter. The light filling LED lamp can shine inside, prevents that the photo that miniature camera shot from passing dark, the unable discernment's condition from appearing. Power module utilizes the soft packet of lithium cell of U-shaped, can save casing inner space.

6. The utility model discloses the communication module who sets up can with the host computer communication, upload the host computer on the current detection condition of mechanical water gauge in real time to when appearing unusual, can in time inform the host computer, arrange personnel's maintenance as early as possible.

7. The utility model discloses set up the clock chip on control circuit board, can carry out the timing and handle, can set up the time of checking meter in control circuit board in advance, according to the clock chip, arrival time begins to check meter promptly.

Drawings

FIG. 1 is a schematic view of a mechanical water meter and an automatic meter reading device;

FIG. 2 is a view showing a structure of a coupling cover and a fastening ring;

fig. 3 is an explosion diagram of the automatic meter reading device.

The device comprises a mechanical water meter 1, a connecting cover 11, a fastening ring 12, a first sealing ring 13, a lead sealing handle 14, a notch 15, a wide ring 16, a groove 17, a fastening handle 18, a meter reading device 2, a casing 21, a semi-cylinder 211, a micro camera 212, a light supplementing LED lamp 213, a water sensor 214, a 485 communication interface 215, a lower circuit board 22, an upper circuit board 23, a soft-package lithium battery 24-U, a second sealing ring 25, a top cover 26 and a protective cover 27.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 3, the utility model discloses an automatic device of checking meter of mechanical water meter, it can be applied to on being in adverse circumstances's mechanical water meter, including connecting cover 11, tighrening ring 12 and through connecting cover 11, tighrening ring 12 and the device 2 of checking meter that mechanical water meter 1 is connected, the device 2 of checking meter includes casing 21, miniature camera 212, light filling LED lamp 213, water sensor 214, control circuit board and is used for the power module of power supply. The power module in this embodiment uses a U-shaped soft-packed lithium battery 24.

The connecting cover 11 replaces the original copper cover of the mechanical water meter 1, the lower part of the connecting cover 11 is consistent with the original copper cover in structure, and the requirements of water meter sealing and lead seal removal prevention are met. In this embodiment, the upper end of the connecting cover 11 protrudes outwards to form a 5mm wide ring 16, a groove 17 is formed in the wide ring 16, and a first sealing ring 13 is placed on the groove 17 during installation. 4 lead sealing handles 14 are arranged on the outer wall of the connecting cover 11 at intervals.

Before installing the connecting cover 11, a fastening ring 12 is placed on the mechanical water meter, referring to fig. 2, the inner diameter of the fastening ring 12 is slightly larger than the outer diameter of the lower end of the connecting cover 11 and smaller than the outer diameter of a wide ring 16 at the upper end of the connecting cover 11, an inner thread is arranged on the inner wall of the fastening ring 12, a stepped external thread joint is arranged at the lower end of a shell 21, the stepped external thread joint at the lower end of the shell 21 is matched with the internal thread of the fastening ring 12, and an inner thread is arranged on the connecting cover 11 and is matched with an external thread on the mechanical water meter 1.

Circle interval sets up 4 breach 15 in tighrening ring 12 bottom, and 4 breach 15 correspond with 4 lead sealing handle 14 positions on the connecting cover 11, avoid the lead sealing handle 14 of connecting cover 11 during the installation, and tighrening ring 12 outer wall has 2 fastening handles 18.

Referring to fig. 3, the casing 21 of the meter reading device 2 of the present invention is integrally configured as a cylindrical structure with a wide top and a narrow bottom, and the narrow bottom of the casing 21 is a step-shaped male connector, which is engaged with the inner thread of the fastening ring 12. Go up the wide portion and be two semicircular structures, place control circuit board in the semicircular space of one side respectively, be halfcylinder hollow structure in the opposite side, halfcylinder 211 top is transparent material, halfcylinder 211 is just to the word code area of mechanical water gauge 1 (pointer type water gauge is black pointer district, word wheel formula or pointer character wheel combination formula water gauge are the word wheel district, the same down), casing 21 upper end also sets into step form external thread joint, place second sealing washer 25 on the step form external thread joint of casing 21 upper end, again with middle veneer transparent material's top cap 26 threaded connection. The top cover 26 is also rotatably connected with a protective cover 27 which can be rotatably connected with the top cover 26 through a hinge, and the edge of the protective cover is fixed through a buckle.

The miniature camera 212 is installed in the casing 21 and is just opposite to the 1-character code area of the mechanical water meter, and the miniature camera 212, the light supplement LED lamp 213 and the water sensor 214 are connected with the control circuit board through circuits. In the embodiment, a micro camera 212 and a light supplement LED lamp 213 are arranged above the inner side of the vertical surface of the semi-cylinder 211, the micro camera 212 is obliquely aligned to a mechanical water meter code area, a water immersion sensor 214 is arranged below the micro camera, and after the micro camera is arranged, the whole semi-cylinder 211 is filled with waterproof glue, so that the micro camera can bear normal tap water pressure and has no leakage; there is a semi-annular space between the semi-cylinder 211 and the casing 21 for placing the U-shaped soft package lithium battery 24.

The control circuit board arranged in the semicircular space at the other side in the shell 21 of the meter reading device 2 comprises an upper circuit board 23 and a lower circuit board 22. The upper circuit board 23 is provided with a camera chip interface, a water immersion signal chip interface, an LED lamp interface and a power conditioning circuit, the lower circuit board 22 is provided with a micro-processing chip and a storage chip, the micro-processing chip is connected with the micro camera 212 and the water immersion sensor 214 through the camera chip interface and the water immersion signal chip interface, the micro-processing chip is also provided with a trapezoidal correction algorithm, the trapezoidal correction algorithm is used for carrying out digital identification on an image shot by the micro camera and carrying out automatic inspection on an identification result; the light supplementing LED lamp is connected with the micro-processing chip through an LED lamp interface; the upper circuit board 23 and the lower circuit board 22 are connected by a flat cable. The U-shaped soft package lithium battery is connected with each circuit module through the power conditioning circuit and supplies power to each circuit module.

Still be provided with 485 communication interface on the lower circuit board 22, the microprocessor chip passes through 485 communication interface and is connected with communication module, and communication module and host computer are connected. In this embodiment, a waterproof 485 communication interface 215 connected with the lower circuit board 22 is left outside the housing 21, and can be connected with a communication module through the 485 communication interface 215, and the communication module communicates with an upper computer, and can be used for receiving a meter reading instruction or transmitting signal abnormal data, meter reading data and the like to the upper computer. The utility model discloses a device 2 and the communication module separation mode of checking meter provide communication module with data, can satisfy multiple communication modes such as wired, wireless, can realize many tables sharing communication module, reduce long-range automatic cost of checking meter. A clock chip is also provided on the lower circuit board 22 and interfaces with the microprocessor chip.

The utility model discloses device 2 checks meter has regularly to check meter and two kinds of modes of checking meter of communication interface instruction. Every day zero hour or when receiving the communication instruction of checking meter, device 2 that checks meter starts light filling LED lamp 213, and miniature camera 212 shoots water meter word code photo, and microprocessor chip MCU carries out trapezoidal correction to the figure at first, then carries out digital identification, passes through 485 communication interface 215 with the discernment result and transmits the host computer, and discernment result and picture are deposited in memory chip simultaneously. When the water immersion sensor 214 sends a water immersion signal, the micro processing chip MCU controls and starts the micro camera 212 to photograph for image recognition of water meter, whether water enters or not is abnormal, or abnormal conditions are found when water meter character code image recognition is carried out, and the meter reading device 2 sends an abnormal alarm through the 485 communication interface 215.

The utility model discloses automatic device of checking meter's application method as follows:

installation: when installing automatic device of checking meter, close 1 side valve of intaking of mechanical water gauge earlier, lift the former copper cover of water gauge, overlap fastening ring 12 on mechanical water gauge 1, then the external screw thread threaded connection on connecting cover 11 and the mechanical water gauge 1, notice: the position of the lead sealing hole corresponds to the position of the lead sealing hole of the mechanical water meter 1 after the connecting cover 11 is screwed down. Then, the meter reading device 2 is connected with the mechanical water meter 1 below, the first sealing ring 13 is completely positioned in the groove 17 before connection, the character code area of the mechanical water meter 1 is positioned in the center of a semicircular transparent window of the meter reading device 2, the micro camera 212 is opposite to the character code area of the mechanical water meter 1, then the fastening ring 12 moves upwards, the notch 15 is opposite to the position of the lead sealing handle 14 of the connecting cover 11, the inner thread of the fastening ring 12 is connected with the lower single outer thread of the shell 21 of the meter reading device 2, and the first sealing ring 13 on the connecting cover 11 is pressed tightly to achieve water prevention. And finally, connecting the upper computer through a waterproof 485 communication interface 215 of the meter reading device 2 by using a waterproof joint.

Use of: the utility model discloses a device 2 of checking meter possesses two-stage waterproof function, firstly device 2 of checking meter itself has waterproof function, secondly device 2 of checking meter forms waterproof space between the two through connecting cover 11 with mechanical water gauge 1, in the adverse circumstances that has the water logging such as underground water gauge well, satisfies the digital requirement of shooting the water gauge of making a video recording. The meter reading device 2 shoots through the inclination of the miniature camera 212, the ladder diagram of the picture is corrected, the requirement of pattern recognition is met, the equipment space is saved, the equipment size is reduced, and the installation in a narrow space can be met. The light supplementing LED lamp 213 is started when the preset meter reading time is up, the micro camera 212 shoots a digital reading of the water meter, the micro processing chip conducts trapezoidal correction on the graph, then conducts digital recognition on the corrected graph, meanwhile conducts automatic inspection on the recognition result, if the result is lower than the last meter reading result, the error is considered, the re-recognition is conducted, if the error is continuously recognized for 5 times, the re-recognition is conducted again, the water meter reading result, the picture and the shooting time parameter are successfully stored in the storage chip and can be uploaded to the upper computer, and the micro processing chip controls the light supplementing LED lamp 213 to be turned off. If the continuous 5 times of repeated shooting identification is unsuccessful, the number is marked as abnormal, the microprocessing chip stores the shot picture and the shooting time parameter into the storage chip and can upload the shot picture and the shooting time parameter to the upper computer, and the microprocessing chip controls the closing of the light supplementing LED lamp 213. When the upper computer sends a meter reading request through the communication interface, the communication interface sends the meter reading request to the microprocessor chip, and the microprocessor chip continues to control the light supplementing LED lamp 213 and the micro camera 212 to be started.

When the mechanical water meter 1 is broken and water leakage occurs, a water immersion sensor 214 in the meter reading device 2 receives a water immersion signal, a light supplement LED lamp 213 is started to shoot pictures, and the pictures and a fault alarm signal are uploaded to an upper computer and stored in a storage chip. The device works in a triggering mode of clock, communication and water logging signals, is in a standby state at ordinary times, and has working current less than 3 mA. And the whole machine is in a working state only when the meter reading time is preset or a communication request and a water immersion signal exist, so that the power consumption of the device is reduced. The utility model discloses a device 2 of checking meter has adopted the soft packet of lithium cell 24 of large capacity U type, can satisfy 3 years live time under the full charge state.

When manual meter reading is needed on site, the reading number of the water meter can be seen by lifting the protective cover through the transparent semicircular window of the meter reading device 2, and the number can be directly read.

Maintenance: 1) and (5) replacing the battery. When the capacity of the U-shaped soft package lithium battery 24 reaches 15%, the microprocessor chip of the meter reading device 2 sends an alarm signal through the communication interface. When the U-shaped lithium battery 24 is replaced, the meter reading device 2 can be unscrewed under the condition that the meter reading device 2 is normally soaked in no water, or the top cover 26 of the meter reading device is directly unscrewed, and a battery line is pulled out to replace the U-shaped lithium battery 24. 2) And replacing the meter reading device 2. When the meter reading device 2 cannot work normally due to faults, the meter reading device 2 can be unscrewed to replace another meter reading device under the condition of normal waterless soaking.

Compared with the prior art, the utility model, dual waterproof function satisfies various abominable service environment requirements in indoor, outdoor and the water gauge well that exists and soak, and firstly the concrete waterproof function of device of checking meter itself, secondly the device of checking meter forms waterproof space between the two through being connected the cover with mechanical water meter, prevents that water and dust from getting into. The device can judge whether the water meter breaks or not by combining the water sensor with the image; the device stores the daily water meter reading, and can judge whether the pipe network has a water leakage site according to the regional water meter data. The utility model adopts the separation mode of the meter reading device 2 and the communication module to provide data for the communication module, thereby satisfying various communication modes such as wire and wireless, realizing the sharing of the communication module by a plurality of meters and reducing the cost of remote automatic meter reading; the meter reading device adopts a hollow transparent structure (the top cover 26 is transparent), and the requirement of manual meter reading on site can be still met after the meter reading device is installed.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (9)

1. The automatic meter reading device for the mechanical water meter is applied to the mechanical water meter (1), and is characterized by comprising a connecting cover (11), a fastening ring (12) and a meter reading device (2) connected with the mechanical water meter (1) through the connecting cover (11) and the fastening ring (12), wherein the meter reading device (2) comprises a shell (21), a micro camera (212), a light supplement LED lamp (213), a water immersion sensor (214), a control circuit board and a power supply module for supplying power;

the miniature camera (212) is arranged in the shell (21) and is right opposite to a character code area of the mechanical water meter (1), and the miniature camera (212), the light supplement LED lamp (213) and the water immersion sensor (214) are in line connection with the control circuit board;

connect cover (11) upper end outside protrusion wide ring (16), tighrening ring (12) internal diameter slightly is greater than connect cover (11) lower extreme external diameter and be less than connect cover (11) upper end wide ring (16) external diameter, tighrening ring (12) inner wall sets up the internal thread, casing (21) lower extreme sets up step form external thread joint, tighrening ring (12) internal thread with step form external thread joint screw thread matching of casing (21) lower extreme, connect cover (11) and set up the internal thread, its external thread matching on with mechanical water gauge (1).

2. The automatic meter reading device of the mechanical water meter is characterized in that a plurality of lead sealing handles (14) are arranged on the outer wall of the connecting cover (11) at intervals, and notches (15) are arranged at the lower ends of the inner wall of the fastening ring (12) and correspond to the lead sealing handles (14).

3. The automatic meter reading device of a mechanical water meter according to claim 1, wherein a groove (17) is formed in the wide ring (16), and a first sealing ring (13) is arranged in the groove (17).

4. The automatic meter reading device of a mechanical water meter according to claim 1, wherein the upper end of the housing (21) is also provided with a step-shaped male connector on which the second sealing ring (25) is placed, and the upper end of the housing (21) is in threaded connection with a top cover (26) made of transparent material.

5. The automatic meter reading device for the mechanical water meter according to claim 4, wherein a protective cover (27) is further rotatably connected to the top cover (26).

6. The automatic meter reading device for the mechanical water meter according to any one of claims 1 to 5, wherein the control circuit board comprises an upper circuit board (23) and a lower circuit board (22), the upper circuit board and the lower circuit board are both arranged in the housing (21), a camera chip interface, a water immersion signal chip interface, an LED lamp interface and a power conditioning circuit are arranged on the upper circuit board (23), a microprocessor chip and a memory chip are arranged on the lower circuit board (22), the microprocessor chip is connected with the memory chip, and the microprocessor chip is connected with the micro camera (212), the water immersion sensor (214) and the light filling LED lamp (213) through the camera chip interface, the water immersion signal chip interface and the LED lamp interface; the upper circuit board (23) is connected with the lower circuit board (22) through a flat cable.

7. The automatic meter reading device of a mechanical water meter according to claim 6, wherein the power module is a U-shaped soft-package lithium battery (24) and is connected with each circuit module through a power conditioning circuit.

8. The automatic meter reading device for the mechanical water meter according to claim 7, wherein a 485 communication interface is further arranged on the lower circuit board (22), the microprocessor chip is connected with the communication module through the 485 communication interface, and the communication module is connected with an upper computer.

9. The automatic meter reading device for the mechanical water meter according to claim 8, wherein a clock chip is further disposed on the lower circuit board (22) and is connected to the microprocessor chip through an interface.

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