Pressure stabilizing type measurement anti-theft water meter

Abstract

The invention discloses a pressure stabilizing type measurement anti-theft water meter, which belongs to the technical field of water meter flow measurement, and comprises a water meter main body, the water meter main body comprises a shell assembly, a water tank assembly, a driving assembly and a display assembly, a spacer ring is arranged between a water inlet pipe and a water outlet pipe in a shell, and the interior of the shell is divided into a water inlet cavity and a water outlet cavity by the spacer ring; by means of the water meter and the connecting pipeline, silt blocks blocking the tangential water inlet hole can be dredged only under the condition that the water hammer effect is briefly continuous, and under the normal condition, the dredged end is very thin and horizontally placed in the tangential water inlet hole; the water flow in the water meter and the stability of water flow are not affected under the normal condition, the frequency of dismounting and cleaning the water meter by workers at ordinary times is greatly reduced, and silt blocks in the tangential water inlet hole are stripped in a reciprocating turning mode by horizontally placing one end of the turning part in the tangential water inlet hole, so that the silt blocks are cleaned more thoroughly.

Description

Technical Field

[0001] The present invention relates to the technical field of water meter flow measurement, and specifically to a voltage-stabilized measurement anti-theft water meter. Background Technique

[0002] A voltage-stabilized measurement anti-theft water meter is a water meter with voltage-stabilizing and anti-theft functions. Its main function is to measure the water flow in the connected pipeline. A pressure-stabilizing valve is installed at the water outlet pipe of the water meter to control the water flow to a certain extent, and the water pressure in the water pipe connected to the water meter is stabilized to reduce the water hammer effect. At the same time, a monitor is installed on the water meter to monitor in real time to achieve the purpose of anti-theft. The measurement principle of its water flow is that the water flow in the water meter enters the water tank through the tangential inlet holes on the water tank, impacts the impeller in the water tank, makes the impeller rotate, and the impeller drives the reduction mechanism composed of multiple gears in the water meter to rotate slowly. The reduction mechanism drives the counter to operate. The operator can obtain the measurement data by observing the digital display of the counter. Its principle is relatively simple. However, in actual use, especially due to the complexity of the outdoor environment, such as unreasonable pipeline layout, too frequent start and stop of water pumps, and too large changes in water flow velocity, etc., the pipeline and the water meter connected to the pipeline will still have a relatively strong water hammer effect.

[0003] In actual use, the main factor affecting the accuracy of water meter data is that the tangential inlet holes on the water tank in the water meter are blocked by sediment in the water, resulting in a change in the water flow passing through the water meter and causing inaccurate measurement of the water meter. Although the water flow passing through the water meter is filtered at the front end, there is still sediment in the water. For example, although the tap water we use at home is filtered by the water treatment plant and then transported, there are still many impurities in the tap water we drink. Over time, it will cause blockage of the tangential inlet holes on the water tank in the water meter. The prior art installs a filter screen in the water meter, but the filter screen itself will also be blocked, and the operator still needs to often disassemble and clean the water meter for maintenance. Or in a similar prior art, a knocking mechanism continuously knocks on the tangential inlet holes to achieve the purpose of dredging the tangential inlet holes. However, its continuous knocking will cause a turbulent flow phenomenon to the water flow entering the water meter, affecting the normal measurement of the water meter. And if the knocking mechanism has a large volume, it will occupy a certain space of the tangential inlet hole, affecting the water flow of the tangential inlet hole. If the knocking mechanism has a small volume, the horizontal reciprocating knocking of the prior art knocking mechanism can only knock off a very small part of the sediment blocking the entire tangential inlet hole, and still cannot dredge the tangential inlet hole. For example, when a knocking rod stabs directly into a wall, only a hole is left on the wall, and the whole wall cannot be knocked off. Summary of the Invention

[0004] In order to solve the technical problems mentioned in the above background technique, the present invention provides a voltage-stabilized measurement anti-theft water meter, and the technical solution adopted is as follows:

[0005] It includes a water meter main body, which consists of a housing assembly, a water tank assembly, a driving assembly, and a display assembly. A pressure reducing valve is provided on the housing assembly, and a monitor is provided on the display assembly. Inside the housing assembly, the water tank assembly and the driving assembly are arranged in sequence from bottom to top. The display assembly is provided on the driving assembly and is connected to the housing assembly. A number of tangential water inlet holes are evenly distributed along the circumferential direction on the water tank assembly. A number of dredging mechanisms are provided inside the housing assembly, and the dredging mechanisms are aligned with the tangential water inlet holes. The dredging mechanism includes a shaking member and a turning member provided on the shaking member. The housing assembly includes a housing, with a water inlet pipe and a water outlet pipe provided at the left and right ends of the housing respectively. A pressure reducing valve is provided on the water outlet pipe. The water inlet pipe is lower than the water outlet pipe. A partition ring is provided inside the housing between the water inlet pipe and the water outlet pipe. The inside of the housing is divided into a water inlet chamber and a water outlet chamber by the partition ring. The dredging mechanism is provided in the water inlet chamber and is fixed to the bottom of the partition ring.

[0006] Further, the water tank assembly includes a water tank and a fixing ring provided on the water tank. A number of tangential water inlet holes are evenly distributed along the circumferential direction on the water tank. The diameter of the fixing ring is larger than that of the water tank. An outlet is provided on the fixing ring. The water tank is located inside the water inlet chamber, and the fixing ring is placed on the partition ring. The dredging mechanisms are evenly distributed around the water tank. A fixing seat is provided at the center inside the water tank assembly. A base is provided on the fixing seat. A fixing shaft is provided on the base. An impeller is provided on the fixing shaft. A shaft hole is provided at the bottom shaft end of the impeller. The fixing shaft is located inside the shaft hole.

[0007] Further, the shaking member includes a tube. A circular pressing plate is provided at the center inside the tube. A movable rod is provided at the center of the upper part of the circular pressing plate. The movable rod movably penetrates the upper part of the tube and a solid ball is provided on the movable rod. A rack is provided at the center of the bottom of the circular pressing plate and the rack movably penetrates the bottom of the tube. Rack teeth are provided on the part of the rack located outside the tube. A spring is provided outside the rack. One end of the spring is fixed to the bottom of the circular pressing plate and the other end is fixed to the inner bottom of the tube. A turning member is provided at the bottom of the tube.

[0008] Further, a number of fixing rods are provided on the upper part of the tube, and the fixing rods are fixed to the bottom of the partition ring.

[0009] Further, the turning member includes a group of L-shaped fixing plates fixed to the bottom of the tube. A bearing is provided on the L-shaped fixing plates. A rotating shaft is provided on the bearing. A semi-gear is provided on the rotating shaft. The semi-gear meshes with the rack. A flap is horizontally provided on the semi-gear, and one end of the flap is located at the center of the tangential water inlet hole.

[0010] Further, the driving assembly includes a cylinder. A fixed bearing is provided inside the cylinder. A driving rod is provided inside the fixed bearing. A driving gear is provided at the upper end of the driving rod. The lower end of the driving rod penetrates the bottom of the cylinder and is connected to the shaft end of the impeller.

[0011] Furthermore, the display component includes a housing. An observation glass is provided at the upper part of the housing. A monitor is provided on one side of the housing. A fixing cylinder is provided inside the housing. A speed reduction mechanism composed of several gears and a counter are provided inside the fixing cylinder. The speed reduction mechanism is connected to the counter. The shaft end of one of the gears penetrates through the bottom of the fixing cylinder and a passive gear is provided at the end. The passive gear meshes with the active gear. The fixing cylinder is connected to the cylinder body, and the housing is connected to the housing body.

[0012] The present invention has the following advantages: The present invention cleverly utilizes the water hammer effect that occurs irregularly during the normal flow of water through the water meter and the pipes connected to the water meter, resulting in the water meter generating violent up and down shaking during the occurrence of the water hammer effect, driving the dredging mechanism to move violently up and down, so that one end of the turning part horizontally located at the center of the tangential water inlet hole generates a certain angle of clockwise and counterclockwise reciprocating turning, causing the sediment block blocked in the tangential water inlet hole to be turned and peeled off from the center hole as a whole. After being separated, it is cleverly carried out of the water meter by the water flow flowing through the water meter, making the water flow rate in the water meter normal. The present invention relies on the water meter and the connecting pipes to dredge the sediment block blocking the tangential water inlet hole only when the water hammer effect lasts briefly. And under normal circumstances, the dredging end is very thin and horizontally placed in the tangential water inlet hole, which will not affect the water flow rate and the stability of the water flow in the water meter under normal circumstances, greatly reducing the frequency of workers' disassembly and cleaning of the water meter usually. And by horizontally placing one end of the turning part in the tangential water inlet hole to reciprocally turn and peel off the sediment block in the tangential water inlet hole, the cleaning of the sediment block is more thorough. Description of the Drawings

[0013] Figure 1 is an exploded view of the present invention;

[0014] Figure 2 is a three-dimensional view of the water tank assembly of the present invention;

[0015] Figure 3 is of the present invention Figure 2 partial enlarged view at a in;

[0016] Figure 4 is a three-dimensional view of the impeller of the present invention;

[0017] Figure 5 is a three-dimensional sectional view of the dredging mechanism tube of the present invention;

[0018] Figure 6 is a three-dimensional view of the composition of each component of the present invention;

[0019] Figure 7 is a three-dimensional sectional view of the housing of the present invention.

[0020] Attached drawings: 1. Housing assembly, 2. Water tank assembly, 3. Driving assembly, 4. Display assembly, 5. Pressure reducing valve, 6. Monitor, 7. Tangential water inlet hole, 8. Housing, 9. Water inlet pipe, 10. Water outlet pipe, 11. Spacer ring, 12. Water inlet chamber, 13. Water outlet chamber, 14. Water tank, 15. Fixed ring, 16. Water outlet, 17. Fixed seat, 18. Base, 19. Fixed shaft, 20. Impeller, 21. Shaft hole, 22. Tube, 23. Circular pressing plate, 24. Movable rod, 25. Solid ball, 26. Rack, 27. Spring, 28. Fixed rod, 29. L-shaped fixing plate, 30. Bearing, 31. Rotating shaft, 32. Half gear, 33. Flap, 34. Cylinder, 35. Fixed bearing, 36. Driving rod, 37. Driving gear, 38. Housing cover, 39. Observation glass, 40. Fixed cylinder, 41. Gear, 42. Counter, 43. Driven gear. Detailed implementation

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figure 1-7 , the present invention provides a voltage-stabilizing measurement anti-theft water meter, including a water meter main body. The water meter main body includes a housing assembly 1, a water tank assembly 2, a driving assembly 3 and a display assembly 4. Water flows into the housing assembly 1 through a pipeline, and then enters the water tank assembly 2 tangentially through the housing assembly 1. The water tank assembly 2 drives the driving assembly 3, and the driving assembly 3 drives the display assembly 4 to realize the display of the measurement data of the water flow rate. A pressure reducing valve 5 is provided on the housing assembly 1, and the water flow rate is controlled by the pressure reducing valve to achieve a slight voltage-stabilizing effect. A monitor 6 is provided on the display assembly 4. The monitor 6 monitors the surroundings in real time and transmits the picture to a remote display system to achieve the anti-theft function of the water meter. The water tank assembly 2 and the driving assembly 3 are arranged in sequence from bottom to top in the housing assembly 1. The water tank assembly 2 is fixed in the housing assembly 1, the driving assembly 3 is fixed on the water tank assembly 2, the display assembly 4 is provided on the driving assembly 3, and the display assembly 4 is connected to the housing assembly 1. A plurality of tangential water inlet holes 7 are evenly distributed along the circumferential direction on the water tank assembly 2. The tangential water holes 7 make the water flow passing through the tangential water holes 7 move tangentially, so that the water flow drives the impeller 20 to rotate.

[0023] There are several dredging mechanisms arranged inside the housing assembly 1. The dredging mechanisms are facing the tangential water inlet holes 7. Each dredging mechanism dredges the sediment blocks blocked in each tangential water inlet hole 7. The dredging mechanism includes a shaking member and a turning member arranged on the shaking member. The shaking member moves upward with the water hammer effect of the water meter, and one end of it drives one end of the turning member to make a reciprocating rotation in the clockwise and counterclockwise directions. The housing assembly includes a housing 8. The left and right ends of the housing 8 are respectively provided with a water inlet pipe 9 and a water outlet pipe 10. The water inlet pipe 9 and the water outlet pipe 10 are respectively connected to the pipelines. The water flow in the pipeline enters the water meter through the water inlet pipe 9 and then comes out through the water outlet pipe 10. A pressure reducing valve 5 is arranged on the water outlet pipe 10. The pressure reducing valve 5 automatically controls the water flow in the water outlet pipe 10 to achieve a slight pressure stabilizing purpose. The water inlet pipe 9 is lower than the water outlet pipe 10 and they are not directly connected. A partition ring 11 is arranged inside the housing 8 between the water inlet pipe 9 and the water outlet pipe 10. The housing 8 is divided into a water inlet chamber 12 and a water outlet chamber 13 by the partition ring 11. The dredging mechanism is arranged in the water inlet chamber 12 and is fixed at the bottom of the partition ring 11. The water flow enters the water inlet chamber 12 through the water inlet pipe 9 and then enters the water tank assembly 2, enters the water outlet chamber 13 through the water tank assembly 2, and then enters the water outlet pipe 10.

[0024] The water tank assembly 2 includes a water tank 14 and a fixing ring 15 arranged on the water tank 14. A number of tangential water inlet holes 7 are evenly distributed along the circumferential direction on the water tank 14. The diameter of the fixing ring 15 is larger than the diameter of the water tank 14, so that the fixing ring 15 cannot enter the water inlet chamber 12 when the water in the water tank 14 enters it. An outlet 16 is arranged on the fixing ring 15. After the water flow enters the water tank 14 through the tangential water inlet holes 7, it enters the water outlet pipe 10 through the outlet 16. The water tank 14 is located inside the water inlet chamber 12. The bottom of the water tank 14 is hermetically connected to the bottom of the water inlet chamber 12. The fixing ring 15 is placed on the partition ring 11. The dredging mechanisms are evenly distributed around the water tank 14. A fixing seat 17 is arranged at the center inside the water tank assembly 2. The fixing seat 17 is fixed at the bottom of the water inlet chamber 12. A base 18 is arranged on the fixing seat 17. The base 18 is fixed on the fixing seat 17. A fixing shaft 19 is arranged on the base 18. An impeller 20 is arranged on the fixing shaft 19. A shaft hole 21 is arranged at the bottom shaft end of the impeller 20. The fixing shaft 19 is located inside the shaft hole 21. The fixing shaft 19 is movably arranged inside the shaft hole 21. Therefore, when the impeller 20 rotates under the impact of the water flow, the impeller 20 rotates on the fixing shaft 19.

[0025] The shaking member includes a tube 22. Both the upper and lower parts of the tube 22 are closed structures. A circular pressing plate 23 is arranged at the center inside the tube 22. The circular pressing plate 23 is arranged at the center to provide a lifting space inside the tube 22 when it shakes up and down. An activity rod 24 is arranged at the center of the upper part of the circular pressing plate 23. The activity rod 24 movably penetrates through the upper part of the tube 22 and a solid ball 25 is arranged on the activity rod 24. The activity rod 24 can lift and lower through the upper part of the tube 22 and forms a seal with the tube 22. A rack 26 is arranged at the center of the bottom of the circular pressing plate 23 and the rack 26 movably penetrates through the bottom of the tube 22, and a seal is formed between the rack 26 and the bottom of the tube 22. Rack teeth are arranged on the part of the rack 26 located outside the tube 22. A spring 27 is arranged outside the rack 26. One end of the spring 27 is fixed to the bottom of the circular pressing plate 23 and the other end is fixed to the inner bottom of the tube 22. When the water hammer effect causes the solid ball 25 to move violently up and down, the spring 27 is released. When it is normal, the spring 27 resets, so that one end of the flap 33 is always horizontally located at the center of the tangential water inlet hole 7. According to Newton's second law F = ma, it can be known that the resultant force of the upward and downward movement of the falling solid ball 25 depends on its own mass, that is, the acceleration of the upward and downward movement. Although its volume is small, during the short time when the water hammer effect drives the water meter to vibrate violently up and down, its acceleration a is very large. Therefore, the resultant force of the solid ball 25 is very large, and it can overcome the elastic force of the spring 27 to move the rack 26 downward. A turning member is arranged at the bottom of the tube 22. The up and down movement of the rack 26 drives the turning member to rotate back and forth clockwise and counterclockwise in a cross manner. A number of fixing rods 28 are arranged on the upper part of the tube 22. The fixing rods 28 are fixed to the bottom of the spacer ring 11. The tube 22 is fixed to the spacer ring 11 through the fixing rods 28.

[0026] The turning member includes a group of L-shaped fixing plates 29 fixed to the bottom of the tube 22. The rack 26 is located between the L-shaped fixing plates 29. Bearings 30 are arranged on the L-shaped fixing plates 29. A rotating shaft 31 is arranged on the bearings 30. A semi-gear 32 is arranged on the rotating shaft 31. The semi-gear 32 meshes with the rack 26. A flap 33 is horizontally arranged on the semi-gear 32. The rack 26 drives the semi-gear 32 to rotate back and forth clockwise and counterclockwise at a certain angle. One end of the flap 33 is located at the center of the tangential water inlet hole 7.

[0027] The driving assembly 3 includes a cylinder body 34. A fixed bearing 35 is arranged inside the cylinder body 34. A driving rod 36 is arranged inside the fixed bearing 35. A driving gear 37 is arranged at the upper end of the driving rod 36. The lower end of the driving rod 36 penetrates through the bottom of the cylinder body 34 and is connected to the shaft end of the impeller 20. When the impeller 20 rotates, it drives the driving rod 36 to rotate on the fixed bearing 35, and the driving rod 36 drives the driving gear 37 to rotate.

[0028] The display component 4 includes a housing 38. An observation glass 39 is provided on the upper part of the housing 38. The observation glass 39 is fixed to the housing 38. The measurement data on the counter 42 in the water meter is observed through the housing 38. A monitor 6 is provided on one side of the housing 38. A fixed cylinder 40 is provided inside the housing 38. A reduction mechanism composed of a number of gears 41 and a counter 42 are provided inside the fixed cylinder 40. The reduction mechanism is connected to the counter 42. The shaft end of one of the gears 41 penetrates the bottom of the fixed cylinder 40 and a driven gear 43 is provided at the end. The driven gear 43 meshes with the driving gear 37. When the driving rod 36 drives the driving gear 37 to rotate, the driving gear 37 drives the driven gear 43 to rotate. The driven gear 43 drives the shaft end of one of the gears 41 to rotate, causing one of the gears 41 to rotate. One of the gears 41 drives the other gears 41 of different sizes to rotate to achieve speed reduction. Then the last connected gear 41 drives the numbers on the counter 42 to flip, measuring the flow rate of the water meter. The fixed cylinder 40 is connected to the cylinder body 34, and the housing 38 is connected to the housing 8. The working principle of the mechanical pressure-stabilizing measurement anti-theft water meter is prior art and can be understood in conjunction with the accompanying drawings of the specification, which will not be elaborated here.

[0029] The working principle of the present invention: When a water hammer effect occurs in the water meter main body and the connected pipelines, the water meter main body itself vibrates violently and rapidly up and down. The dredging mechanism in the water meter main body also moves up and down accordingly. At this time, the solid ball 25 drives the movable rod 24, the movable rod 24 drives the circular pressing plate 23, and the circular pressing plate 23 drives the rack 26 to move up and down in the tube cylinder 22. The spring 27 is compressed or released. The rack 26 drives the half gear 32 to reciprocally flip clockwise and counterclockwise within a certain angle. The half gear 32 drives the rotating shaft 31 to rotate on the bearing 30. At the same time, the half gear 32 drives the flap 33 to reciprocally flip clockwise and counterclockwise within a certain angle, so that when one end of the flap 33 located in the tangential water inlet hole 7 flips clockwise or counterclockwise, it flips up and down to remove the sediment blocks located in the tangential water inlet hole 7.

[0030] Since the water flow in the pipeline always enters the water inlet pipe 9 and then enters the water inlet cavity 12, the sediment blocks flipped off in the water inlet hole 7 are carried by the water flow and tangentially enter the water tank 14 through the tangential water inlet hole 7, and then enter the water outlet cavity 13 and are discharged into the water outlet pipe 10 through the water outlet 16 and flow away.

[0031] When the short-term water hammer effect disappears, the spring 27 resets, driving the rack 26 to reset, and then the flap 33 resets. One end of the very thin flap is horizontally placed at the center of the tangential water inlet hole 7 again, without affecting the tangential entry of the water flow into the tangential water inlet hole 7.

[0032] The operation of the present invention is simple and convenient to use, and it is suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A voltage-stabilized measurement anti-theft water meter, comprising a water meter main body, the water meter main body including a housing assembly (1), a water tank assembly (2), a driving assembly (3) and a display assembly (4), a pressure reducing valve (5) is provided on the housing assembly (1), a monitor (6) is provided on the display assembly (4), the water tank assembly (2) and the driving assembly (3) are sequentially arranged in the housing assembly (1) from bottom to top, the display assembly (4) is provided on the driving assembly (3), the display assembly (4) is connected to the housing assembly (1), and a plurality of tangential water inlet holes (7) are uniformly distributed along the circumferential direction on the water tank assembly (2), characterized in that, There are several dredging mechanisms arranged inside the housing assembly (1). The dredging mechanisms are facing the tangential water inlet holes (7). The dredging mechanism includes a shaking member and a turning member arranged on the shaking member. The housing assembly includes a housing (8). The left and right ends of the housing (8) are respectively provided with a water inlet pipe (9) and a water outlet pipe (10). A pressure reducing valve (5) is arranged on the water outlet pipe (10). The water inlet pipe (9) is lower than the water outlet pipe (10). A partition ring (11) is arranged inside the housing (8) between the water inlet pipe (9) and the water outlet pipe (10). The inside of the housing (8) is divided into a water inlet chamber (12) and a water outlet chamber (13) by the partition ring (11). A dredging mechanism is arranged inside the water inlet chamber (12), and the dredging mechanism is fixed at the bottom of the partition ring (11).

2. The voltage-stabilized measurement anti-theft water meter according to claim 1, characterized in that, The water tank assembly (2) includes a water tank (14) and a fixing ring (15) arranged on the water tank (14). A number of tangential water inlet holes (7) are evenly distributed along the circumferential direction on the water tank (14). The diameter of the fixing ring (15) is larger than that of the water tank (14). A water outlet (16) is arranged on the fixing ring (15). The water tank (14) is located inside the water inlet chamber (12). The fixing ring (15) is placed on the partition ring (11). The dredging mechanisms are evenly distributed around the water tank (14). A fixing seat (17) is arranged at the center inside the water tank assembly (2). A base (18) is arranged on the fixing seat (17). A fixing shaft (19) is arranged on the base (18). An impeller (20) is arranged on the fixing shaft (19). A shaft hole (21) is arranged at the bottom shaft end of the impeller (20). The fixing shaft (19) is located inside the shaft hole (21).

3. The voltage-stabilized measuring anti-theft water meter according to claim 1, characterized in that, The shaking member includes a tube (22). A circular pressing plate (23) is arranged at the center inside the tube (22). A movable rod (24) is arranged at the center of the upper part of the circular pressing plate (23). The movable rod (24) movably penetrates through the upper part of the tube (22), and a solid ball (25) is arranged on the movable rod (24). A rack (26) is arranged at the center of the bottom of the circular pressing plate (23), and the rack (26) movably penetrates through the bottom of the tube (22). Rack teeth are arranged on the part of the rack (26) located outside the tube (22). A spring (27) is arranged outside the rack (26). One end of the spring (27) is fixed to the bottom of the circular pressing plate (23), and the other end is fixed to the inner bottom of the tube (22). A turning member is arranged at the bottom of the tube (22).

4. The voltage-stabilized measurement anti-theft water meter according to claim 3, wherein A number of fixing rods (28) are arranged on the upper part of the tube (22), and the fixing rods (28) are fixed to the bottom of the partition ring (11).

5. The voltage-stabilized measurement anti-theft water meter according to claim 3, characterized in that The turning member includes a group of L-shaped fixing plates (29) fixed to the bottom of the tube (22). A bearing (30) is arranged on the L-shaped fixing plate (29). A rotating shaft (31) is arranged on the bearing (30). A semi-gear (32) is arranged on the rotating shaft (31). The semi-gear (32) meshes with the rack (26). A flap (33) is horizontally arranged on the semi-gear (32), and one end of the flap (33) is located at the center of the tangential water inlet hole (7).

6. The voltage-stabilized measurement anti-theft water meter according to claim 2, wherein The driving component (3) includes a cylinder body (34). A fixed bearing (35) is arranged inside the cylinder body (34). A driving rod (36) is arranged inside the fixed bearing (35). A driving gear (37) is arranged at the upper end of the driving rod (36). The lower end of the driving rod (36) penetrates through the bottom of the cylinder body (34) and is connected to the shaft end of the impeller (20).

7. The voltage-stabilized measurement anti-theft water meter according to claim 1, characterized in that, The display component (4) includes a housing cover (38). An observation glass (39) is arranged at the upper part of the housing cover (38). A monitor (6) is arranged at one side of the housing cover (38). A fixed cylinder (40) is arranged inside the housing cover (38). A speed reduction mechanism composed of a plurality of gears (41) and a counter (42) are arranged inside the fixed cylinder (40). The speed reduction mechanism is connected to the counter (42). The shaft end of one of the gears (41) penetrates through the bottom of the fixed cylinder (40) and a driven gear (43) is arranged at the end. The driven gear (43) meshes with the driving gear (37). The fixed cylinder (40) is connected to the cylinder body (34). The housing cover (38) is connected to the housing body (8).

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