Intelligent water meter with anti-theft alarm function

Abstract

The application discloses a kind of intelligent water meters with anti-theft alarm function, it is related to intelligent water meter technical field, including bottom shell and the dial of inside installation gear box, the left and right ends of bottom shell are respectively fixed with anti-freezing inlet pipe and anti-freezing outlet pipe, the inside of anti-freezing inlet pipe is installed with one-way valve structure, the outside of one-way valve structure is provided with control structure, the right end of anti-freezing inlet pipe is installed with control valve, the inside of filter barrel is provided with inner ring, the inside rotation of inner ring is installed with impeller, the top of inner ring is installed with intermediate ring, the top of intermediate ring is installed with gear box, the top of dial is rotationally installed with protective cover.The intelligent water meter with anti-theft alarm function can avoid the situation that the water meter idles due to the impact of large pressure in the pipe on the impeller, the installation assembly with anti-theft function cooperates with the limiting assembly, which facilitates the disassembly and repair of the anti-freezing shell and the parts inside the anti-freezing shell.

Description

Technical Field

[0001] This invention relates to the field of smart water meter technology, specifically to a smart water meter with anti-theft alarm function. Background Technology

[0002] A smart water meter is a new type of water meter that uses modern microelectronics technology, modern sensing technology, and smart IC card technology to measure water consumption, transmit water data, and settle transactions. It can record and electronically display water consumption, control water consumption, automatically calculate water fees for tiered water pricing, store water consumption data, install a one-way valve inside the water meter to reduce measurement errors caused by idling, and has an anti-theft structure for high security.

[0003] Chinese Patent CN110017880B discloses an anti-dry-running water meter, comprising a metering mechanism. A first mounting cavity and a second mounting cavity are formed on the inner wall of the antifreeze inlet pipe of the water meter. A first spring seat is installed at the contact point between the second mounting cavity and the inner wall of the antifreeze inlet pipe. A flow hole is formed at the center of the first spring seat. A first spring is sleeved on the first spring seat, and a first valve core is sleeved on the outer sleeve of the first spring. A sealing plate is installed at the end of the first mounting cavity. A third mounting cavity is formed on the inner wall of the antifreeze outlet pipe of the water meter. A second spring seat is installed at the end of the antifreeze outlet pipe. A second spring is sleeved on the second spring seat, and a second valve core is sleeved on the outer sleeve of the second spring. The invention also provides a method for operating the aforementioned anti-dry-running water meter. When the water supply is interrupted, because the water meter outlet has a unidirectional water flow function, backflow of stored water is prevented, and the water meter will not run dry. Furthermore, the expansion and contraction of the compressed air in the water pipe are suppressed, reducing the metering error caused by dry running.

[0004] Chinese Patent CN113280882B discloses a fully sealed anti-theft device for smart water meters, comprising a main housing. The bottom of the main housing has an installation groove, and a sealing plate is sealed to the bottom opening near the groove. Multiple sets of fixing seats are evenly distributed on the upper surface of the sealing plate, each fixing seat having a vertically connected connecting shaft. Each connecting shaft has a connector at its top, and the connector and shaft are integrally formed. Multiple sets of connecting seats are fixedly connected inside the main housing, with each connecting seat corresponding to a connecting shaft. Each connecting seat has a connecting hole at its bottom, with a clearance fit between the hole and the shaft. A mounting groove is provided on one side of the main housing, and a buzzer is fixedly installed inside the groove. This fully sealed anti-theft device for smart water meters has a simple and reasonable structure, a novel design, and is easy to install. It effectively prevents the water meter from being disassembled during use, has high security, and is suitable for widespread use.

[0005] Based on existing solutions and actual production and processing, existing smart water meters with anti-theft alarm functions have a one-way valve installed in the antifreeze inlet pipe to reduce measurement errors. However, when the air pressure inside the pipe is high, it will still impact the spring inside the one-way valve structure, causing the water meter to run dry. Therefore, we propose a smart water meter with anti-theft alarm function to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a smart water meter with anti-theft alarm function to solve the problem mentioned in the background art: in order to reduce measurement errors, a one-way valve is installed in the antifreeze water inlet pipe of the existing smart water meter with anti-theft alarm function, but when the air pressure in the pipe is high, it will still impact the spring inside the one-way valve structure, thus causing the water meter to run dry.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a smart water meter with anti-theft alarm function, comprising a bottom shell and a dial with a gearbox installed inside:

[0008] The bottom shell is fixed with an antifreeze inlet pipe and an antifreeze outlet pipe at its left and right ends, respectively. The antifreeze inlet pipe is equipped with a one-way valve structure inside, and a control structure is provided on the outside of the one-way valve structure. A control valve is installed at the right end of the antifreeze inlet pipe.

[0009] A filter barrel is installed at the bottom of the inner shell. An inner ring is provided inside the filter barrel. An impeller is rotatably installed inside the inner ring. An intermediate ring is installed at the top of the inner ring. A gearbox is installed at the top of the intermediate ring. A cover plate is fixed to the top of the dial with screws. A control panel is installed inside the cover plate.

[0010] The outer side of the dial is fixed with an antifreeze case, and the outside of the antifreeze case is provided with an anti-theft mounting component. An observation cover is snapped onto the top of the antifreeze case, and a limiting component is installed on the top of the observation cover.

[0011] By adopting the above technical solution, the water meter can avoid running dry due to the impact of large air pressure inside the pipe on the impeller. The anti-theft installation components and limiting components work together to facilitate the disassembly and maintenance of the antifreeze shell and the internal components of the antifreeze shell.

[0012] Preferably, the one-way valve structure includes a valve pipe, a retaining ring, a baffle, a spring, and a rubber block. The valve pipe is installed inside the antifreeze inlet pipe, a retaining ring is fixed inside the valve pipe, a baffle is provided on the right side of the retaining ring, a spring is fixed on the left side of the baffle, and a rubber block is fixed on the left end of the spring.

[0013] The one-way valve structure is installed inside the antifreeze inlet pipe, and absorbs pressure through springs and rubber blocks to achieve the purpose of buffering.

[0014] Preferably, the control structure includes a connecting rod, a liquid sensor, a waterproof motor, and an arc-shaped plate. The liquid sensor is fixed to the left side of the connecting rod, the arc-shaped plate is fixed to the output end of the waterproof motor, the waterproof motor is installed at the top of the inside of the valve pipe, and the connecting rod is fixed to the left side of the rubber block.

[0015] A liquid sensor is fixed to the left side of the connecting rod to detect whether water is flowing through it.

[0016] Preferably, the sealing ring at the top of the filter barrel is installed in the sealing groove of the bottom shell.

[0017] Because the sealing ring at the top of the filter canister is installed in the sealing groove of the bottom shell, the installation sealing performance is improved.

[0018] Preferably, a protective cover is rotatably installed on the top of the dial, and a drive structure is installed on the left side inside the dial. The top of the control valve is engaged with the output shaft of the drive structure.

[0019] Because the top of the control valve is engaged with the output shaft of the drive structure, it is convenient to disassemble and assemble the control valve and the drive structure.

[0020] Preferably, the bottom of the inner ring is provided with a water inlet groove, and the top of the inner ring is provided with a water outlet groove.

[0021] Because the bottom of the inner ring has an inlet groove and the top of the inner ring has an outlet groove, the liquid enters from the inlet groove and flows out from the outlet groove above.

[0022] Preferably, the top of the impeller extends through the intermediate ring.

[0023] Because the top of the impeller passes through the intermediate ring, the impeller can connect with the gears inside the gearbox.

[0024] Preferably, the mounting assembly includes a base plate, a first load cell, an alarm, a first side plate, a second load cell, a second side plate, a third side plate, a limiting plate, and a mounting rod. The base plate is located below the antifreeze shell. The first load cell is installed inside the base plate. The alarm is installed at the front end of the base plate. The first side plate and the second side plate are fixed to the left and right ends of the upper surface of the base plate, respectively. The second load cell is installed inside the first side plate. The third side plate is fixed to both the front and rear ends of the upper surface of the base plate. The limiting plate is rotatably mounted on the top of both the first and second side plates. The mounting rod is fixed to the lower surface of the base plate.

[0025] Since the first side plate and the second side plate are fixed to the left and right ends of the upper surface of the base plate respectively, the left and right sides of the antifreeze shell are defined by the first side plate and the second side plate.

[0026] Preferably, the limiting component includes a rectangular block, a lead screw, and a movable block. The rectangular block is fixed on the upper surface of the observation cover, and the lead screw is rotatably installed at both ends of the observation cover. The lead screw drives the movable block through its thread. The thread directions at the front and rear ends of the lead screw are opposite, and the bottom end of the movable block is located in the groove at the top of the observation cover.

[0027] Because the lead screw thread drive has a moving block, rotating the lead screw can drive the moving block to move relative to the lead screw.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the smart water meter with anti-theft alarm function can avoid the water meter from running dry due to the impact of large air pressure in the pipe on the impeller; the anti-theft installation component and the limiting component work together to facilitate the disassembly and maintenance of the antifreeze shell and the internal components of the antifreeze shell.

[0029] 1. The antifreeze inlet pipe is equipped with a one-way valve structure. A control structure is set on the outside of the one-way valve structure. The one-way valve structure includes a valve pipe, a retaining ring, a baffle, a spring, and a rubber block. The control structure includes a connecting rod, a liquid sensor, a waterproof motor, and an arc plate. The control structure controls the baffle and rubber block inside the one-way valve structure. When the liquid sensor detects that liquid is not passing through and only gas is passing through, the waterproof motor controls the arc plate to press against the rubber block, thereby preventing the water meter from running dry due to the impact of large air pressure in the pipe on the impeller.

[0030] 2. The mounting assembly includes a base plate, a first weighing sensor, an alarm, a first side plate, a second weighing sensor, a second side plate, a third side plate, a limiting plate, and a mounting rod. The antifreeze shell is installed inside the mounting assembly. The water meter is monitored by the first weighing sensor, the alarm, and the second weighing sensor within the mounting structure. When the observation cover is removed, the weighing sensor detects a change in weight, and the alarm immediately sounds to prevent the water meter from being stolen. The mounting assembly, combined with the limiting assembly, can restrict the antifreeze shell and the observation cover. The limiting assembly includes a rectangular block, a lead screw, and a moving block. The limiting assembly enables the mounting assembly to stably install the antifreeze shell and restrict the observation cover, facilitating disassembly and maintenance.

[0031] 3. Heating wires are installed at the top of both the antifreeze inlet and outlet pipes. When the heating wires are energized, they can heat the water inside the antifreeze inlet and outlet pipes. The antifreeze shell is made of antifreeze material, which can prevent the smart water meter from freezing. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 This is a schematic diagram of the axial section structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0035] Figure 3 This is a cross-sectional view of the one-way valve structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the first axial side structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the second axial side structure of the present invention;

[0038] Figure 6 This is a schematic diagram of the protective cover in its flipped-over state according to the present invention;

[0039] Figure 7 This is a schematic diagram of the disassembled structure of the present invention;

[0040] Figure 8 This is a schematic diagram of the third axial side structure of the present invention;

[0041] Figure 9 This is a schematic diagram of the installation component structure of the present invention.

[0042] In the diagram: 1. Bottom shell; 2. Antifreeze inlet pipe; 3. One-way valve structure; 301. Valve pipe; 302. Retaining ring; 303. Baffle; 304. Spring; 305. Rubber block; 4. Control structure; 401. Connecting rod; 402. Liquid sensor; 403. Waterproof motor; 404. Arc plate; 5. Control valve; 6. Filter canister; 7. Inner ring; 8. Inlet tank; 9. Outlet tank; 10. Impeller; 11. Intermediate ring; 12. Gearbox; 13. Dial; 14. Protective cover; 15. Cover plate; 16. Control panel; 17. Drive structure; 18. Antifreeze shell; 19. Base plate; 20. First load cell; 21. Alarm; 22. First side plate; 23. Second load cell; 24. Second side plate; 25. Third side plate; 26. Limiting plate; 27. Observation cover; 28. Rectangular block; 29. ​​Lead screw; 30. Moving block; 31. Mounting rod; 32. Antifreeze outlet pipe. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] Existing smart water meters with anti-theft alarm function have a one-way valve installed in the antifreeze inlet pipe to reduce measurement error. However, when the air pressure in the pipe is high, it will still impact the spring 304 inside the one-way valve structure 3, causing the water meter to run dry. To solve this technical problem, this embodiment discloses the following technical content.

[0045] Please see Figures 1-9 A smart water meter with anti-theft alarm function includes a base shell 1, an antifreeze inlet pipe 2, a one-way valve structure 3, a valve pipe 301, a retaining ring 302, a baffle 303, a spring 304, a rubber block 305, a control structure 4, a connecting rod 401, a liquid sensor 402, a waterproof motor 403, an arc plate 404, a control valve 5, a filter barrel 6, an inner ring 7, an inlet groove 8, an outlet groove 9, an impeller 10, an intermediate ring 11, a gearbox 12, a dial 13, a protective cover 14, a cover plate 15, a control panel 16, a drive structure 17, an antifreeze shell 18, a base plate 19, a first weighing sensor 20, an alarm 21, a first side plate 22, a second weighing sensor 23, a second side plate 24, a third side plate 25, a limiting plate 26, an observation cover 27, a rectangular block 28, a lead screw 29, a moving block 30, a mounting rod 31, and an antifreeze outlet pipe 32.

[0046] like Figure 1 , Figure 4 , Figure 5 and Figure 8 As shown, the left and right ends of the bottom shell 1 are respectively fixed with an antifreeze water inlet pipe 2 and an antifreeze water outlet pipe 32. The antifreeze water inlet pipe 2 and the antifreeze water outlet pipe 32 both penetrate the antifreeze shell 18. The antifreeze water inlet pipe 2 and the antifreeze water outlet pipe 32 are both connected to external pipes. Water enters through the antifreeze water inlet pipe 2 and exits through the antifreeze water outlet pipe 32.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, a one-way valve structure 3 is installed inside the antifreeze inlet pipe 2, and a control structure 4 is provided on the outside of the one-way valve structure 3. A control valve 5 is installed at the right end of the antifreeze inlet pipe 2. The one-way valve structure 3 includes a valve pipe 301, a retaining ring 302, a baffle 303, a spring 304, and a rubber block 305. The valve pipe 301 is installed inside the antifreeze inlet pipe 2. A retaining ring 302 is fixed inside the valve pipe 301. A baffle 303 is provided on the right side of the retaining ring 302. A spring 304 is fixed on the left side of the baffle 303. A rubber block 305 is fixed at the left end of the spring 304. The control structure 4 includes a connecting rod 401, a liquid sensor 402, a waterproof motor 403, and an arc plate 404. A liquid sensor 402 is fixed on the left side of the connecting rod 401. An arc plate 404 is fixed at the output end of the waterproof motor 403. The waterproof motor 403 is installed at the top inside the valve pipe 301. The connecting rod 401 is fixed on the left side of the rubber block 305.

[0048] The liquid sensor 402 is connected to the control panel 16. When liquid comes, the liquid sensor 402 transmits information to the control panel 16. The control panel 16 controls the waterproof motor 403 to drive the arc plate 404 to rotate, so that the liquid impacts the baffle 303, the spring 304 and the rubber block 305. The rubber block 305 and the baffle 303 can move to realize the flow of liquid.

[0049] When only gas passes through and no liquid passes through, the arc plate 404 blocks the rubber block 305, thereby limiting the impeller 10 and the gears inside the gearbox 12 (the gears inside the gearbox 12 are not shown).

[0050] The top of the control valve 5 is engaged with the output shaft of the drive structure 17. The opening and closing of the control valve 5 is controlled by the drive structure 17. The filter barrel 6 is installed at the bottom of the inner shell 1. The sealing ring at the top of the filter barrel 6 is installed in the sealing groove of the bottom shell 1. The sealing ring is used to increase the sealing of the filter barrel 6.

[0051] like Figure 1 and Figure 7 As shown, the filter bucket 6 has an inner ring 7 inside, an inlet groove 8 at the bottom of the inner ring 7 and an outlet groove 9 at the top of the inner ring 7. An impeller 10 is rotatably installed inside the inner ring 7, an intermediate ring 11 is installed at the top of the inner ring 7, and a gearbox 12 is installed at the top of the intermediate ring 11.

[0052] The liquid passes through the filter tank 6 and enters the inner ring 7, impacting the impeller 10 and causing the impeller 10 to rotate. This causes the gears in the gearbox 12 to rotate, which in turn causes the display screen above the control panel 16 to show numbers.

[0053] A protective cover 14 is rotatably mounted on the top of the dial 13. A cover plate 15 is fixed to the top of the dial 13 by screws. A control panel 16 is installed inside the cover plate 15. The gears on the dial 13 can be seen by opening the protective cover 14.

[0054] A freeze protection case 18 is fixed to the outer side of the dial 13. An anti-theft mounting component is provided on the outer side of the freeze protection case 18. An observation cover 27 is snapped onto the top of the freeze protection case 18. A limiting component is installed on the top of the observation cover 27.

[0055] The mounting assembly includes a base plate 19, a first load cell 20, an alarm 21, a first side plate 22, a second load cell 23, a second side plate 24, a third side plate 25, a limiting plate 26, and a mounting rod 31. The base plate 19 is located below the antifreeze shell 18. The first load cell 20 is installed inside the base plate 19. The alarm 21 is installed at the front end of the base plate 19. The first side plate 22 and the second side plate 24 are fixed to the left and right ends of the upper surface of the base plate 19, respectively. The interior is equipped with a second weighing sensor 23. The upper surface of the base plate 19 is fixed with a third side plate 25 at both the front and rear ends. The top of the first side plate 22 and the second side plate 24 are rotatably mounted with limiting plates 26. The lower surface of the base plate 19 is fixed with a mounting rod 31. The limiting components include a rectangular block 28, a lead screw 29 and a moving block 30. The upper surface of the observation cover 27 is fixed with a rectangular block 28. The left and right ends of the observation cover 27 are rotatably mounted with lead screws 29. The lead screw 29 is threaded to drive the moving block 30.

[0056] The mounting rod 31 is welded to the mounting structure. The antifreeze shell 18 is installed through the mounting assembly. The antifreeze shell 18 is placed inside the first side plate 22, the second side plate 24 and the third side plate 25. Then, the limiting plate 26 is rotated so that the limiting plate 26 is above the observation cover 27. The operator rotates the screw 29 counterclockwise, and the moving block 30 moves outward so that the outer side of the moving block 30 fits against the limiting plate 26, thereby limiting the limiting plate 26 between the rectangular block 28 and the moving block 30, and thus limiting the observation cover 27.

[0057] The weight of the antifreeze case 18 is monitored by the first weighing sensor 20 or the second weighing sensor 23. When the weight of the antifreeze case 18 is lower than the minimum standard, it indicates that the internal parts of the antifreeze case 18 have been stolen, and the alarm 21 will be triggered.

[0058] When it is necessary to repair the internal components of the antifreeze shell 18, the operator rotates the screw 29 counterclockwise to make the moving block 30 move away from the limiting plate 26, and then rotates the limiting plate 26 to remove the observation cover 27 for repair of the internal components of the antifreeze shell 18.

[0059] When the smart water meter is working, water enters through the antifreeze inlet pipe 2 and exits through the antifreeze outlet pipe 32. The liquid sensor 402 inside the control structure 4 is connected to the control panel 16. When liquid arrives, the liquid sensor 402 transmits information to the control panel 16. The control panel 16 controls the waterproof motor 403 to drive the arc plate 404 to rotate, so that when the liquid impacts the baffle 303, spring 304 and rubber block 305, the rubber block 305 and baffle 303 can move to the right to realize the flow of liquid.

[0060] When the liquid sensor 402 detects that no liquid is passing through and only gas is passing through, such as Figure 1 and Figure 2As shown, the rubber block 305 is blocked by the arc plate 404, thereby limiting the impeller 10 and the gears in the gearbox 12 and preventing the gears from spinning freely;

[0061] The control panel 16 controls the drive structure 17, which in turn controls the opening and closing of the control valve 5. The liquid passes through the filter tank 6 and enters the inner ring 7, impacting the impeller 10 and causing it to rotate. This causes the gears in the gearbox 12 to rotate, which in turn causes the display screen on the top of the control panel 16 to show numbers. The gears on the dial 13 can be seen by opening the protective cover 14, and the numbers on the display screen can be seen through the transparent structure in the middle of the observation cover 27.

[0062] The antifreeze shell 18 is made of thermal insulation and antifreeze material, and as... Figure 1 As shown, heating wires are installed at the top of the inside of both the antifreeze inlet pipe 2 and the antifreeze outlet pipe 32. The water in the pipe is heated by passing electricity through the heating wires to prevent freezing.

[0063] The mounting rod 31 is welded to the mounting structure. The antifreeze shell 18 is installed through the mounting assembly. The antifreeze shell 18 is placed inside the first side plate 22, the second side plate 24 and the third side plate 25. Then, the limiting plate 26 is rotated so that the limiting plate 26 is above the observation cover 27. The screw 29 is rotated counterclockwise, and the moving block 30 moves outward so that the outer side of the moving block 30 fits against the limiting plate 26, thereby limiting the limiting plate 26 between the rectangular block 28 and the moving block 30, and thus limiting the observation cover 27.

[0064] The weight of the antifreeze case 18 is monitored by the first weighing sensor 20 or the second weighing sensor 23. When the weight of the antifreeze case 18 is lower than the minimum standard, it indicates that the internal parts of the antifreeze case 18 have been stolen, and the alarm 21 will be triggered. The alarm 21 will be triggered the moment a non-staff member lifts the observation cover 27.

[0065] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0066] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart water meter with anti-theft alarm function, comprising a base shell (1) and a dial (13) with a gearbox (12) installed inside, characterized in that: The bottom shell (1) is fixed with an antifreeze inlet pipe (2) and an antifreeze outlet pipe (32) at its left and right ends respectively. A one-way valve structure (3) is installed inside the antifreeze inlet pipe (2). A control structure (4) is provided on the outside of the one-way valve structure (3). A control valve (5) is installed at the right end of the antifreeze inlet pipe (2). A filter barrel (6) is installed at the bottom of the inner shell (1). An inner ring (7) is provided inside the filter barrel (6). An impeller (10) is rotatably installed inside the inner ring (7). An intermediate ring (11) is installed at the top of the inner ring (7). A gearbox (12) is installed at the top of the intermediate ring (11). A cover plate (15) is fixed to the top of the dial (13) by screws. A control panel (16) is installed inside the cover plate (15). The outer side of the dial (13) is fixed with an antifreeze shell (18). An anti-theft mounting component is provided on the outside of the antifreeze shell (18). An observation cover (27) is snapped onto the top of the antifreeze shell (18). A limiting component is installed on the top of the observation cover (27). The one-way valve structure (3) includes a valve pipe (301), a retaining ring (302), a baffle (303), a spring (304), and a rubber block (305). The antifreeze water inlet pipe (2... The control structure (4) includes a valve tube (301) installed inside the valve tube (301), a retaining ring (302) fixed inside the valve tube (301), a baffle (303) on the right side of the retaining ring (302), a spring (304) fixed on the left side of the baffle (303), and a rubber block (305) fixed on the left end of the spring (304). The control structure (4) includes a connecting rod (401), a liquid sensor (402), a waterproof motor (403), and an arc plate (404). A liquid sensor (402) is fixed on the left side of the connecting rod (401), and an arc plate (404) is fixed on the output end of the waterproof motor (403). The waterproof motor (403) is installed at the top inside the valve pipe (301). The connecting rod (401) is fixed on the left side of the rubber block (305). The mounting assembly includes a base plate (19), a first weighing sensor (20), an alarm (21), a first side plate (22), a second weighing sensor (23), a second side plate (24), a third side plate (25), a limiting plate (26), and a mounting rod (31). A base plate (19) is provided below the antifreeze shell (18). The first weighing sensor (20) is installed inside the base plate (19). The first side plate (22) and the second side plate (24) are fixed on the left and right ends of the upper surface of the base plate (19), respectively. The second weighing sensor (23) is installed inside the first side plate (22).

2. The smart water meter with anti-theft alarm function according to claim 1, characterized in that: The sealing ring at the top of the filter barrel (6) is installed in the sealing groove of the bottom shell (1).

3. A smart water meter with anti-theft alarm function according to claim 1, characterized in that: A protective cover (14) is rotatably installed on the top of the dial (13), and a drive structure (17) is installed on the left side inside the dial (13). The top of the control valve (5) is engaged with the output shaft of the drive structure (17).

4. A smart water meter with anti-theft alarm function according to claim 1, characterized in that: The bottom end of the inner ring (7) is provided with a water inlet groove (8), and the top end of the inner ring (7) is provided with a water outlet groove (9).

5. A smart water meter with anti-theft alarm function according to claim 1, characterized in that: The top of the impeller (10) passes through the intermediate ring (11).

6. A smart water meter with anti-theft alarm function according to claim 1, characterized in that: An alarm (21) is installed at the front end of the base plate (19). A third side plate (25) is fixed at both the front and rear ends of the upper surface of the base plate (19). A limiting plate (26) is rotatably installed at the top of the first side plate (22) and the second side plate (24). An installation rod (31) is fixed on the lower surface of the base plate (19).

7. A smart water meter with anti-theft alarm function according to claim 1, characterized in that: The limiting components include a rectangular block (28), a lead screw (29), and a moving block (30). The rectangular block (28) is fixed on the upper surface of the observation cover (27). The lead screw (29) is rotatably installed on both the left and right ends of the observation cover (27). The moving block (30) is threaded through the lead screw (29). The thread directions of the front and rear ends of the lead screw (29) are opposite. The bottom end of the moving block (30) is located in the groove at the top of the observation cover (27).

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