A water meter impeller with automatic density adjustment

Abstract

The application discloses a water meter impeller capable of automatically adjusting density, which comprises an impeller body, the impeller body is provided with a containing cavity, the containing cavity is provided with an opening, a piston assembly is movably arranged in the containing cavity, and the piston assembly is sealed with the inner wall of the containing cavity so that the containing cavity forms a sealed cavity, the sealed cavity is internally filled with gas, an adjusting channel is formed on the impeller body, one end of the adjusting channel extends to the opening of the containing cavity, and the other end of the adjusting channel is used for being connected with a flow channel of tap water so that tap water can flow through the adjusting channel and act on the piston assembly, and an impeller shaft is coaxially arranged with the impeller body, and the impeller shaft is fixed relative to the impeller body. The application can improve the measurement accuracy and stability of the water meter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water meters, in particular to a water meter impeller with automatic density adjustment. BACKGROUND

[0002] As an important metering device for water consumption, the working principle of a water meter is that when water enters the impeller box from the water meter shell and impacts the impeller, the impeller generates a driving torque. When the driving torque of the impeller is greater than the resistance torque of the impeller, the impeller starts to rotate. When the flow rate is constant, the driving torque and the resistance torque are balanced, and the impeller rotates at a constant speed. The flow rate and the cumulative flow rate of the water flow in the pipeline are measured by sensing the rotation speed of the impeller in the water flow.

[0003] With the improvement of the metering level of the water meter, the flow performance of the water meter under different water pressure conditions and the smoothness of the flow curve will produce certain deviation and fluctuation. How to ensure the stability of the metering characteristics of the water meter under different water pressure conditions has become an important issue in the design and development of water meters in the water meter industry. The design of the metering mechanism of the water meter directly affects the stability of the metering characteristics of the water meter under different water pressure conditions, and among them, the structure of the impeller, especially the overall density of the impeller, has the greatest impact on the water meter under different water pressure conditions. Therefore, how to optimize the structural design of the water meter impeller so that the overall density of the water meter impeller can be automatically adjusted with the change of the water pressure in the water meter has become a breakthrough point of this issue. SUMMARY

[0004] The present application provides a water meter impeller with automatic density adjustment, which can improve the metering accuracy and stability of the water meter.

[0005] In order to solve the above technical problems, the present application provides a water meter impeller with automatic density adjustment, comprising:

[0006] An impeller body having a receiving cavity with an opening;

[0007] A piston assembly movably arranged in the receiving cavity, and the piston assembly is sealed with the inner wall of the receiving cavity to form a sealed cavity, and the sealed cavity is filled with a gas;

[0008] An adjustment channel formed on the impeller body, one end of the adjustment channel extending to the opening of the receiving cavity, and the other end of the adjustment channel being used for intercommunication with a flow channel of tap water so that tap water can flow through the adjustment channel to act on the piston assembly;

[0009] An impeller shaft coaxially arranged with the impeller body, and the impeller shaft is fixed relative to the impeller body.

[0010] As a preferred form of the above technical solution, the impeller body comprises a central shaft portion and impeller blades, the impeller blades are arranged in an annular array on the central shaft portion, and the impeller shaft is fixed on the top of the central shaft portion.

[0011] As a preferred form of the above technical solution, the piston assembly comprises a piston body and a sealing ring, an annular groove is arranged on the outer surface of the piston body, and the sealing ring is arranged in the annular groove and in sealing contact with the inner wall of the accommodating cavity.

[0012] As a preferred form of the above technical solution, a central hole is arranged at the center of the lower end of the central shaft portion, the accommodating cavity is located in the central hole, the water meter impeller further comprises an impeller bushing arranged in the central hole, and the adjusting channel comprises at least an extension groove formed on the outer surface of the impeller bushing and extending in the axial direction of the central hole, and the outer surface of the impeller bushing is in sealing fit with the inner surface of the central hole.

[0013] As a preferred form of the above technical solution, the extension grooves are arranged in an annular array on the outer surface of the impeller bushing so that the impeller bushing has an external gear shape.

[0014] As a preferred form of the above technical solution, the central hole is a stepped hole comprising a first accommodating hole and a second accommodating hole, the second accommodating hole is close to the lower end of the central shaft portion, the hole diameter of the first accommodating hole is smaller than that of the second accommodating hole, the impeller bushing is installed in the second accommodating hole, and the accommodating cavity is arranged in the first accommodating hole.

[0015] As a preferred form of the above technical solution, the water meter impeller further comprises an accommodating cylinder, the first end of the accommodating cylinder is closed, the second end of the accommodating cylinder is formed with the opening, the accommodating cavity is formed in the interior of the accommodating cylinder, the accommodating cylinder is installed in the first accommodating hole, and the opening faces the second accommodating hole.

[0016] As a preferred form of the above technical solution, the length of the first accommodating hole is greater than the length of the accommodating cylinder so that the second end of the accommodating cylinder is located in the interior of the first accommodating hole, and the adjusting channel further comprises a long slot formed on the inner surface of the first accommodating hole, the long slot extends from the position of the second end of the accommodating cylinder to the lower end surface of the first accommodating hole, and the outer surface of the accommodating cylinder is in sealing fit with the inner surface of the first accommodating hole.

[0017] As a preferred form of the above technical solution, the long slot is arranged in an annular array on the inner surface of the first accommodating hole so as to form an internal gear shape on the inner surface of the first accommodating hole.

[0018] As the preferred technical scheme of the above-mentioned technical scheme, the top of the middle shaft part is formed with a gear part, a mounting hole is arranged at the center position of the gear part, and the impeller shaft is mounted in the mounting hole.

[0019] The application provides a water meter impeller with automatically adjusted density, which comprises an impeller body, a piston assembly, an adjusting channel and an impeller shaft, the impeller body has a containing cavity, the containing cavity has an opening, the piston assembly is movably arranged in the containing cavity, and a seal is arranged between the piston assembly and the inner wall of the containing cavity so that the containing cavity forms a sealed cavity, the sealed cavity is filled with gas, when the water pressure acting on the impeller body in the water meter increases, the gas in the sealed cavity is compressed, so that the gas pressure in the sealed cavity and the water pressure are synchronously increased, the volume of the sealed gas is reduced due to the movement of the piston assembly, the water in the water meter enters the space below the piston through the adjusting channel, so that the overall density of the water meter impeller is increased, and the sinking tendency of the water meter impeller is increased; when the water pressure acting on the impeller body in the water meter decreases, the gas in the sealed cavity expands, so that the gas pressure in the sealed cavity and the water pressure are synchronously decreased, the volume of the sealed gas is increased due to the movement of the piston, and the water in the water meter is squeezed out of the space below the piston through the adjusting channel, so that the overall density of the water meter impeller is reduced, and the floating tendency of the water meter impeller is increased. Therefore, the overall density of the impeller is automatically adjusted according to the water pressure, the water meter impeller can automatically adapt to different densities under different water pressures, the sinking and floating state of the impeller can be automatically controlled by the water pressure, and the metering characteristics stability of the water meter under different water pressures is realized.

[0020] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the specific embodiments of the application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 A three-dimensional exploded schematic view of the water meter impeller with automatically adjusted density in the embodiment is shown;

[0022] Fig. 2 A partial cross-sectional view of the water meter impeller with automatically adjusted density in the embodiment is shown;

[0023] Fig. 3 A partial cross-sectional view of the impeller body at a first angle in the embodiment is shown;

[0024] Fig. 4 A partial cross-sectional view of the impeller body at another angle in the embodiment is shown;

[0025] In the figure: 10, impeller shaft; 20, impeller body; 30, containing cylinder; 40, impeller bushing; 50, impeller bearing; 60, piston assembly; 70, adjusting channel; 101, mounting notch; 201, central shaft part; 202, impeller blade; 203, gear part; 204, central hole; 301, containing cavity; 401, central mounting hole; 601, piston body; 602, sealing ring; 603, annular groove; 701, long slot; 702, extension slot; 2031, mounting hole; 2032, protrusion; 2041, first containing hole; 2042, second containing hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Referring to Figs. 1 to 4 The embodiments of the present application provide an automatic density adjustment impeller for water meter, which comprises:

[0028] The impeller body 20 has a containing cavity 301, and the containing cavity 301 has an opening;

[0029] The piston assembly 60 is movably arranged in the containing cavity 301, and the piston assembly 60 is sealingly arranged between the inner wall of the containing cavity 301 so as to form a sealed cavity in the containing cavity 301, and the sealed cavity is filled with gas;

[0030] The adjusting channel 70 is formed on the impeller body 20, one end of the adjusting channel 70 extends to the opening of the containing cavity 301, and the other end of the adjusting channel 70 is used for being in communication with the flow channel of tap water so as to enable the tap water to flow through the adjusting channel 70 to act on the piston assembly 60;

[0031] The impeller shaft 10 is coaxially arranged with the impeller body 20, and the impeller shaft 10 is fixed relative to the impeller body 20.

[0032] The embodiment provides a water meter impeller with automatic density adjustment, which comprises an impeller body 20, a piston assembly 60, an adjusting channel 70 and an impeller shaft 10, the impeller body 20 has a containing cavity 301, the containing cavity 301 has an opening, the piston assembly 60 is movably arranged in the containing cavity 301, and the piston assembly 60 is in sealing contact with the inner wall of the containing cavity 301, so that the containing cavity 301 forms a sealed cavity, and the sealed cavity is filled with gas, when the water pressure in the water meter increases, the gas in the sealed cavity is compressed, so that the gas pressure in the sealed cavity and the water pressure are synchronously increased, the volume of the sealed gas is reduced due to the movement of the piston assembly 60, the water in the water meter enters the space below the piston through the adjusting channel 70, so that the overall density of the water meter impeller is increased, and the sinking trend of the water meter impeller is increased, when the water pressure in the water meter decreases, the gas in the sealed cavity is expanded, so that the gas pressure in the sealed cavity and the water pressure are synchronously decreased, the volume of the sealed gas is increased due to the movement of the piston, and the water in the water meter is extruded from the space below the piston through the adjusting channel 70, so that the overall density of the water meter impeller is reduced, and the floating trend of the water meter impeller is increased, so that the overall density of the water meter impeller is automatically adjusted according to the water pressure, the water meter impeller can automatically adapt to different densities under different water pressures, the sinking and floating state of the water meter impeller can be automatically regulated by the water pressure, and the metering characteristics stability of the water meter under different water pressures is realized.

[0033] In a further implementable manner of the embodiment, the impeller body 20 comprises a central shaft part 201 and impeller blades 202, the impeller blades 202 are arranged in an annular array on the central shaft part 201, and the impeller shaft 10 is fixed to the top of the central shaft part 201.

[0034] In a further implementable manner of the embodiment, the piston assembly 60 comprises a piston body 601 and a sealing ring 602, the outer surface of the piston body 601 is provided with an annular groove 603, the sealing ring 602 is arranged in the annular groove 603, and the sealing ring 602 is in sealing contact with the inner wall of the containing cavity 301.

[0035] In a further implementable manner of the embodiment, the lower end of the central shaft part 201 is provided with a central hole 204, the containing cavity 301 is located in the central hole 204, the water meter impeller further comprises an impeller bushing 40, the impeller bushing 40 is arranged in the central hole 204, the adjusting channel 70 at least comprises an extension groove 702 formed on the outer surface of the impeller bushing 40 and extending in the axial direction of the central hole 204, and the outer surface of the impeller bushing 40 is in sealing fit with the inner surface of the central hole 204.

[0036] In a further implementable manner of the embodiment, the extension grooves 702 are arranged in an annular array on the outer surface of the impeller bushing 40, so that the impeller bushing 40 has an external gear shape. In a further implementable manner of the embodiment, the extension grooves 702 are arranged in an annular array on the outer surface of the impeller bushing 40, so that the impeller bushing 40 has an external gear shape.

[0037] The extension grooves 702 are arranged in a ring array on the outer surface of the impeller bushing 40 so that the impeller bushing 40 has an outer gear shape, which can enable the incoming water to pass through the extension grooves 702 uniformly and apply force on the piston assembly 60 uniformly.

[0038] In addition, the impeller bearing 50 is installed in the central mounting hole 401 of the impeller bushing 40 in the embodiment, and the impeller bearing 50 is a corundum bearing.

[0039] In a further implementation manner of the embodiment, the central hole 204 is a stepped hole, the stepped hole includes a first accommodating hole 2041 and a second accommodating hole 2042, the second accommodating hole 2042 is close to the lower end of the central shaft part 201, the hole diameter of the first accommodating hole 2041 is smaller than the hole diameter of the second accommodating hole 2042, the impeller bushing 40 is installed in the second accommodating hole 2042, and the accommodating cavity 301 is arranged in the first accommodating hole 2041.

[0040] In a further implementation manner of the embodiment, the water meter impeller further includes an accommodating cylinder 30, a first end of the accommodating cylinder 30 is closed, an opening is formed at a second end of the accommodating cylinder 30, the accommodating cavity 301 is formed in the inside of the accommodating cylinder 30, the accommodating cylinder 30 is installed in the first accommodating hole 2041, and the opening faces the second accommodating hole 2042.

[0041] Specifically, the piston assembly 60 in the embodiment is loaded into the accommodating cavity 301 of the accommodating cylinder 30 from the opening of the accommodating cylinder 30.

[0042] In a further implementation manner of the embodiment, the length of the first accommodating hole 2041 is greater than the length of the accommodating cylinder 30, so that the second end of the accommodating cylinder 30 is located in the inside of the first accommodating hole 2041, the adjusting channel 70 further includes a long groove 701 formed on the inner surface of the first accommodating hole 2041, the long groove 701 extends from the position of the second end of the accommodating cylinder 30 to the lower end surface of the first accommodating hole 2041, and the outer surface of the accommodating cylinder 30 is in sealing fit with the inner surface of the first accommodating hole 2041.

[0043] In a further implementation manner of the embodiment, the long groove 701 is arranged in a ring array on the inner surface of the first accommodating hole 2041, so that an inner gear shape is formed on the inner surface of the first accommodating hole 2041.

[0044] The first accommodating hole 2041 and the second accommodating hole 2042 in the embodiment constitute a stepped hole, and the extension groove 702 is uniformly distributed on the circumferential surface of the impeller bushing 40, and the long groove 701 is distributed on the inner surface of the first accommodating hole 2041, the extension groove 702 and the long groove 701 constitute the adjusting channel 70, which not only can realize the installation of the impeller bushing 40, but also can make the tap water uniformly pass into the piston assembly 60, and also can make the piston assembly 60 be uniformly stressed, further improving the stability of the water meter impeller work.

[0045] In a further implementable manner of the embodiment, the top of the middle shaft part 201 is formed with a gear part 203, and a mounting hole 2031 is arranged at the center position of the gear part, and the impeller shaft 10 is mounted in the mounting hole 2031.

[0046] Specifically, the inner wall of the mounting hole 2031 in the embodiment is provided with a protrusion 2032, and the impeller shaft 10 is provided with a mounting notch 101, and the impeller shaft 10 and the mounting notch 101 cooperate to position the impeller shaft 10 in the mounting hole 2031.

[0047] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0048] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0049] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A water meter impeller with automatic density adjustment, characterized in that, include: An impeller body having a receiving cavity having an opening; A piston assembly is movably disposed in the receiving cavity, and the piston assembly is sealed to the inner wall of the receiving cavity so that the receiving cavity forms a sealed cavity, the interior of which is filled with gas; When the water pressure on the impeller body inside the water meter changes, the gas sealed in the sealed cavity is compressed or expanded, causing the gas pressure and water pressure inside the sealed cavity to increase or decrease synchronously. The volume of the sealed gas decreases or increases due to the movement of the piston assembly. Water inside the water meter enters the space below the piston from the regulating channel, thereby causing the overall density of the water meter impeller to change synchronously with the water pressure, thus enabling automatic regulation of the impeller's floating state through water pressure. An adjustment channel is formed on the impeller body. One end of the adjustment channel extends to the opening of the receiving cavity, and the other end of the adjustment channel is used to communicate with the flow channel of tap water, so that tap water can flow through the adjustment channel and exert force on the piston assembly. The impeller shaft is coaxially arranged with the impeller body, and the impeller shaft is fixed relative to the impeller body.

2. The water meter impeller with automatic density adjustment according to claim 1, characterized in that, The impeller body includes a central shaft and impeller blades. The impeller blades are arranged in a ring array on the central shaft, and the impeller shaft is fixed to the top of the central shaft.

3. The water meter impeller with automatic density adjustment according to claim 1, characterized in that, The piston assembly includes a piston body and a sealing ring. An annular groove is provided on the outer surface of the piston body, and the sealing ring is disposed in the annular groove, and the sealing ring is in sealing contact with the inner wall of the receiving cavity.

4. The water meter impeller with automatic density adjustment according to claim 2, characterized in that, A central hole is provided at the lower center of the central shaft, and the receiving cavity is located in the central hole. The water meter impeller also includes an impeller bushing, which is disposed in the central hole. The adjustment channel includes at least an extension groove formed on the outer surface of the impeller bushing and extending along the axial direction of the central hole. The outer surface of the impeller bushing is sealed to the inner surface of the central hole.

5. The water meter impeller with automatic density adjustment according to claim 4, characterized in that, The extended grooves are arranged in a ring array on the outer surface of the impeller bushing, thus making the impeller bushing have an external gear shape.

6. The water meter impeller with automatic density adjustment according to claim 5, characterized in that, The central hole is a stepped hole, which includes a first receiving hole and a second receiving hole. The second receiving hole is located near the lower end of the central shaft. The diameter of the first receiving hole is smaller than that of the second receiving hole. The impeller bushing is installed in the second receiving hole, and the receiving cavity is disposed in the first receiving hole.

7. The water meter impeller with automatic density adjustment according to claim 6, characterized in that, The water meter impeller also includes a receiving cylinder, the first end of which is closed, the second end of which has the opening, the receiving cavity being formed inside the receiving cylinder, the receiving cylinder being installed in the first receiving hole, and the opening facing the second receiving hole.

8. The water meter impeller with automatic density adjustment according to claim 7, characterized in that, The length of the first receiving hole is greater than the length of the receiving cylinder, so that the second end of the receiving cylinder is located inside the first receiving hole. The adjustment channel also includes an elongated groove formed on the inner surface of the first receiving hole. The elongated groove extends from the second end of the receiving cylinder to the lower end face of the first receiving hole. The outer surface of the receiving cylinder is sealed to the inner surface of the first receiving hole.

9. The water meter impeller with automatic density adjustment according to claim 8, characterized in that, The elongated grooves are arranged in a ring array on the inner surface of the first receiving hole, thereby forming an internal tooth shape on the inner surface of the first receiving hole.

10. The water meter impeller with automatic density adjustment according to claim 2, characterized in that, The top of the central shaft is provided with a gear section, and a mounting hole is provided at the center of the gear section, in which the impeller shaft is installed.

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