Impeller shaft structure of intelligent water meter
By improving the impeller shaft structure, extending the shaft length, and using a wear-resistant bushing assembly, the problems of unstable rotation and wear of the rotating impeller were solved, resulting in a more stable and economical smart water meter design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DONGHAI GRP CORP
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-10
AI Technical Summary
The rotating impeller in existing smart water meters is unstable and suffers from severe wear, mainly due to large dimensional errors in the coaxiality of the shaft.
The design employs an impeller shaft structure, including an impeller box, a rotating impeller, a shaft, and a bushing assembly. By extending the shaft length and using upper and lower bushings with different wear resistance, the manufacturing precision requirements are reduced, rotational stability is enhanced, and the wear-resistant pin and push rod structure reduces the impact of wear.
This results in more stable rotation of the impeller, reduced wear, lower production costs, and improved product economy and ease of use.
Smart Images
Figure CN224480203U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water meter technology, and more specifically to an impeller shaft structure for a smart water meter. Background Technology
[0002] A smart water meter is a water meter that integrates a data processing unit and a communication module, enabling the storage and remote management of water consumption data.
[0003] Patent document (CN207730279U) discloses a smart water meter, as shown in the accompanying drawings of its specification. Figure 2 The impeller includes a rotating impeller with a shaft passing through its top and bottom. When the impeller is impacted by an external water source, it rotates circumferentially relative to the two shafts. However, when the coaxiality error of the two shafts is large, the rotation of the impeller becomes unstable and wear intensifies.
[0004] Therefore, there is a need for an impeller shaft structure in a smart water meter that helps to make the rotation of the impeller more stable. Summary of the Invention
[0005] The main objective of this application is to provide an impeller shaft structure for a smart water meter. The impeller shaft structure includes an impeller housing, a rotating impeller, and a shaft. The impeller housing has an impeller cavity. The rotating impeller is placed within the impeller cavity and includes a vertical cylindrical section and a fan-shaped section. The fan-shaped section is arranged in a circular array around the central axis of the vertical cylindrical section. Each end of the vertical cylindrical section has a recessed hole and an abutment portion. The recessed hole extends from one end of the vertical cylindrical section towards the other end, and the depth of the recessed hole covers the orthographic projection of the fan-shaped section onto the vertical cylindrical section. One end of the shaft is fixedly mounted on the impeller housing, and the other end of the shaft extends into the recessed hole. The length of the shaft extending into the recessed hole is greater than the height of the fan-shaped section. By extending the shaft height, the rotating impeller achieves circumferential rotation compared to a single shaft, and compared to the prior art where the rotating impeller rotates circumferentially relative to two shafts. This results in fewer components, fewer dimensional errors that need to be ensured, and contributes to a more stable rotation of the rotating impeller.
[0006] Another objective of this application is to provide an impeller shaft structure for a smart water meter, wherein the impeller shaft structure of the smart water meter further includes a bushing assembly, the bushing assembly including an upper bushing and a lower bushing, the upper bushing having a first recessed hole, the lower bushing having a first through hole, the upper bushing having higher wear resistance than the lower bushing, the side of the upper bushing facing away from the first recessed hole abutting against the bottom wall of the recessed hole, the other side of the upper bushing abutting against the lower bushing, the end of the lower bushing facing away from the upper bushing extending towards the opening of the first recessed hole, and the lower bushing being fixedly connected to the vertical cylinder portion to avoid severe wear on the recessed hole wall.
[0007] To achieve at least one of the above-mentioned objectives, this application provides an impeller shaft structure for a smart water meter, wherein the impeller shaft structure of the smart water meter includes:
[0008] Impeller box, the impeller box having an impeller cavity;
[0009] A rotating impeller is placed inside the impeller cavity. The rotating impeller includes a vertical cylinder and a fan blade. The fan blade is arranged in a ring array around the central axis of the vertical cylinder. The two ends of the vertical cylinder have a hole and an abutment. The hole extends from one end of the vertical cylinder to the other end, and the depth of the hole covers the orthographic projection of the fan blade onto the vertical cylinder.
[0010] A shaft, one end of which is fixedly mounted on the impeller box, and the other end of which extends into the recessed hole. The length of the shaft extending into the recessed hole is greater than the height of the fan blade.
[0011] In one or more embodiments of this application, the impeller shaft structure of the smart water meter further includes a bushing assembly, the bushing assembly including an upper bushing and a lower bushing, the upper bushing having a first recessed hole, the lower bushing having a first through hole, the upper bushing having higher wear resistance than the lower bushing, the side of the upper bushing facing away from the first recessed hole abutting against the bottom wall of the recessed hole, the other side of the upper bushing abutting against the lower bushing, the end of the lower bushing facing away from the upper bushing extending toward the opening of the first recessed hole, and the lower bushing being fixedly connected to the vertical cylinder portion.
[0012] In one or more embodiments of this application, the bottom wall of the first recess is spherical, and one end of the shaft extending into the recess has a spherical crown portion, which abuts against the spherical surface.
[0013] In one or more embodiments of this application, one end of the shaft extending into the recessed hole has a guide hole, and the impeller shaft structure of the smart water meter further includes a wear-resistant pin, one end of which is disposed in the guide hole, and the other end of which has the spherical crown portion.
[0014] In one or more embodiments of this application, the impeller shaft structure of the smart water meter further includes a housing and a filter screen cover. One end of the housing has a first receiving cavity, and one end of the filter screen cover has a second receiving cavity. One end of the filter screen cover extends into the first receiving cavity and is detachably connected to the housing. Both ends of the impeller box abut against the bottom wall of the first receiving cavity and the filter screen cover, respectively.
[0015] In one or more embodiments of this application, the bottom wall of the first accommodating cavity has a second recess, and corundum is embedded in the second recess, with the abutting portion abutting against the corundum.
[0016] In one or more embodiments of this application, one end of the wear-resistant pin is raised and lowered within the guide hole, the shaft also includes a second through hole that communicates with the guide hole, and the impeller shaft structure of the smart water meter also includes a top rod that is raised and lowered within the second through hole, with one end of the top rod abutting against the wear-resistant pin.
[0017] In one or more embodiments of this application, one end of the opening of the second through hole has a retaining spring groove, a retaining spring is provided in the retaining spring groove, and the retaining spring abuts against the end of the top rod away from the wear-resistant pin.
[0018] In this embodiment, the impeller shaft structure of the smart water meter includes an impeller box, a rotating impeller, and a shaft. The impeller box has an impeller cavity. The rotating impeller is placed inside the impeller cavity and includes a vertical cylinder and a fan blade. The fan blade is arranged in a circular array around the central axis of the vertical cylinder. The two ends of the vertical cylinder have a recessed hole and an abutment portion, respectively. The recessed hole extends from one end face of the vertical cylinder to the other end, and the depth of the recessed hole covers the orthographic projection of the fan blade onto the vertical cylinder. One end of the shaft is fixedly mounted on the impeller box, and the other end of the shaft extends into the recessed hole. The length of the shaft extending into the recessed hole is greater than the height of the fan blade. By extending the height of the shaft, the rotating impeller can rotate circumferentially compared to a single shaft. Compared to the prior art where the rotating impeller rotates circumferentially relative to two shafts, there are fewer components and fewer dimensional errors that need to be ensured, which helps to make the rotation of the rotating impeller more stable. Attached Figure Description
[0019] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:
[0020] Figure 1 The figure shows a schematic diagram of the impeller shaft structure of a smart water meter according to this application without a top rod;
[0021] Figure 2 The diagram shows Figure 1A magnified view of a portion at point C;
[0022] Figure 3 The figure shows a schematic diagram of the impeller shaft structure of a smart water meter according to this application when a push rod is provided;
[0023] Figure 4 The diagram shows... Figure 3 A magnified view of a portion of point D. Detailed Implementation
[0024] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.
[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.
[0026] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0027] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.
[0028] The impeller shaft structure of a schematic smart water meter is shown in the reference. Figures 1 to 4 According to a preferred embodiment of the present invention, an impeller shaft structure for a smart water meter includes an impeller box 10, a rotating impeller 20, and a shaft 30.
[0029] Specifically, such as Figure 1 and Figure 2As shown, the impeller box 10 has an impeller cavity 101; the rotating impeller 20 is placed inside the impeller cavity 101. The rotating impeller 20 includes a vertical cylindrical portion 201 and a fan blade portion 202. The fan blade portion 202 is arranged in a ring array around the central axis of the vertical cylindrical portion 201. The two ends of the vertical cylindrical portion 201 have respectively an embedded hole 2011 and an abutment portion 2012. The embedded hole 2011 extends from one end face of the vertical cylindrical portion 201 towards the other end, and the depth of the embedded hole 2011 covers the impeller cavity 101. The orthographic projection of the fan blade portion 202 onto the vertical cylindrical portion 201, that is, in the depth direction of the recessed hole 2011, is located between the opening of the recessed hole 2011 and the bottom wall of the recessed hole 2011; one end of the shaft 30 is fixedly mounted on the impeller box 10, and the other end of the shaft 30 extends into the recessed hole 2011, and the length of the shaft 30 extending into the recessed hole 2011 is greater than the height of the fan blade portion 202.
[0030] It should be noted that the shaft 30 is fixed. When external water flows into the impeller cavity 101 and impacts the fan blade 202 of the rotating impeller 20, the vertical cylinder 201 rotates circumferentially relative to the shaft 30. Since the insert hole 2011 is extended above the fan blade 202, and the overall length of the shaft 30 is extended, and the high point of the shaft 30 is located above the fan blade 202, the rotating impeller 20 can rotate circumferentially relative to the shaft 30 with only one shaft 30. Compared with the prior art where the rotating impeller 20 rotates circumferentially relative to the shafts 30 at both ends, this application reduces the number of components, so that only the manufacturing precision dimensions of the insert hole 2011 and one shaft 30 need to be controlled, rather than controlling the manufacturing precision dimensions of two insert holes 2011 and two shafts 30, thereby achieving the advantage of making the rotation of the rotating impeller 20 more stable.
[0031] Furthermore, to avoid excessive wear on the sidewalls of the recessed hole 2011, such as... Figure 1 and Figure 2As shown, the impeller shaft structure of the smart water meter also includes a bushing assembly 40, which includes an upper bushing 401 and a lower bushing 402. The upper bushing 401 has a first recessed hole 4011, and the lower bushing 402 has a first through hole. The wear resistance of the upper bushing 401 is higher than that of the lower bushing 402. The side of the upper bushing 401 facing away from the first recessed hole 4011 abuts against the bottom wall of the recessed hole 2011, and the other side of the upper bushing 401 abuts against the lower bushing 402. The end of the lower bushing 402 facing away from the upper bushing 401 extends toward the opening of the first recessed hole 4011. The lower bushing 402 is fixedly connected to the vertical cylinder 201, and the fixed connection method includes, but is not limited to, interference fit or adhesive connection.
[0032] It should be noted that, since the first concave hole 4011 of the upper bushing 401 contacts the shaft 30 during rotation, the service life of the upper bushing 401 can be extended by making the wear resistance of the upper bushing 401 higher than that of the lower bushing 402.
[0033] Similarly, such as Figure 2 As shown, the end of the shaft 30 that extends into the recess 2011 has a guide hole 301, and the impeller shaft structure of the smart water meter also includes a wear-resistant pin 302, one end of which is located in the guide hole 301.
[0034] Furthermore, to reduce friction during rotation, such as Figure 2 As shown, the bottom wall of the first recessed hole 4011 is spherical, and the end of the shaft 30 that extends into the recessed hole 2011 has a spherical crown 3021, that is, the end of the wear-resistant pin 302 that is away from the guide hole 301 has the spherical crown 3021, and the spherical crown 3021 abuts against the spherical surface.
[0035] Furthermore, such as Figure 1 As shown, the impeller shaft structure of the smart water meter also includes a housing 50 and a filter screen 60. One end of the housing 50 has a first receiving cavity 501, and one end of the filter screen 60 has a second receiving cavity 601. One end of the filter screen 60 extends into the first receiving cavity 501 and is detachably connected to the housing 50. In this application, the connection is threaded. Both ends of the impeller box 10 abut against the bottom wall of the first receiving cavity 501 and the filter screen 60, respectively.
[0036] It should be noted that after the impeller box 10 is placed in the first accommodating cavity 501, the impeller box 10 is fixed in the first accommodating cavity 501 by tightening the filter screen cover 60.
[0037] Furthermore, such as Figure 2As shown, the bottom wall of the first accommodating cavity 501 has a second recess, and a corundum 5011 is embedded in the second recess. The abutting part 2012 abuts against the corundum 5011.
[0038] It should be noted that by setting the corundum 5011 and abutting against the abutting part 2012, one end of the vertical cylinder 201 is supported by the shaft 30, and the other end of the vertical cylinder 201 is supported by the corundum 5011, thus avoiding the risk of the rotating impeller 20 moving upward when it rotates circumferentially.
[0039] Furthermore, when the wear-resistant pin 302 wears down after long-term use, the abutment portion 2012 will be separated from the corundum 5011 by a predetermined distance. At this time, the rotating impeller 20 may make a slight upward movement during rotation, resulting in decreased stability. To reduce the impact of the wear-resistant pin 302 on the rotating impeller 20 after wear, such as... Figure 3 and Figure 4 As shown, one end of the wear-resistant pin 302 is vertically disposed within the guide hole 301. The cross-section of the guide hole 301 and the wear-resistant pin 302 is preferably polygonal. Even if the wear-resistant pin 302 can only move vertically relative to the shaft 30, the shaft 30 rotates synchronously when the wear-resistant pin 302 rotates. The shaft 30 also includes a second through hole, which communicates with the guide hole 301. The impeller shaft structure of the smart water meter also includes a top rod 70, which is vertically disposed within the second through hole, and one end of the top rod 70 abuts against the wear-resistant pin 302.
[0040] It should be noted that during the movement of the water meter, when the water flows through the bottom of the top rod 70, it will exert an upward thrust on the bottom of the top surface. This thrust is transmitted to the wear-resistant pin 302 through the top rod 70. When the wear-resistant pin 302 wears after long-term use, and the abutment part 2012 is separated from the corundum 5011 by a predetermined distance, the top rod 70 moves upward under the push of the water flow, and the wear-resistant pin 302 moves upward, and drives the abutment part 2012 to abut against the corundum 5011 again, reducing the impact of the wear-resistant pin 302 after wear.
[0041] In addition, to prevent the push rod 70 from coming out of the second through hole under normal conditions, such as Figure 4 As shown, one end of the second through hole has a retaining spring groove, and a retaining spring 701 is provided in the retaining spring groove. The retaining spring 701 abuts against the end of the top rod 70 that is away from the wear-resistant pin 302.
[0042] In summary, the impeller shaft structure of the smart water meter based on the embodiments of this application has been clarified, which provides advantages such as making the rotation of the rotating impeller more stable.
[0043] It is worth mentioning that, in this embodiment, the impeller shaft structure of the smart water meter is simple in structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the impeller shaft structure of the smart water meter provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.
[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.
Claims
1. An impeller shaft structure for a smart water meter, characterized in that: The impeller shaft structure of the smart water meter includes Impeller box, the impeller box having an impeller cavity; A rotating impeller is placed inside the impeller cavity. The rotating impeller includes a vertical cylinder and a fan blade. The fan blade is arranged in a ring array around the central axis of the vertical cylinder. The two ends of the vertical cylinder have a hole and an abutment. The hole extends from one end of the vertical cylinder to the other end, and the depth of the hole covers the orthographic projection of the fan blade onto the vertical cylinder. A shaft, one end of which is fixedly mounted on the impeller box, and the other end of which extends into the recessed hole. The length of the shaft extending into the recessed hole is greater than the height of the fan blade.
2. The impeller shaft structure of the smart water meter according to claim 1, characterized in that: The impeller shaft structure of the smart water meter also includes a bushing assembly, which includes an upper bushing and a lower bushing. The upper bushing has a first recessed hole, and the lower bushing has a first through hole. The wear resistance of the upper bushing is higher than that of the lower bushing. The side of the upper bushing away from the first recessed hole abuts against the bottom wall of the recessed hole, and the other side of the upper bushing abuts against the lower bushing. The end of the lower bushing away from the upper bushing extends toward the opening of the first recessed hole, and the lower bushing is fixedly connected to the vertical cylinder.
3. The impeller shaft structure of the smart water meter according to claim 2, characterized in that: The bottom wall of the first recess is spherical, and the end of the shaft that extends into the recess has a spherical crown, which abuts against the spherical surface.
4. The impeller shaft structure of the smart water meter according to claim 3, characterized in that: The shaft has a guide hole at one end that extends into the recessed hole. The impeller shaft structure of the smart water meter also includes a wear-resistant pin. One end of the wear-resistant pin is located in the guide hole, and the other end of the wear-resistant pin has the spherical crown portion.
5. The impeller shaft structure of the smart water meter according to claim 4, characterized in that: The impeller shaft structure of the smart water meter also includes a housing and a filter screen. One end of the housing has a first receiving cavity, and one end of the filter screen has a second receiving cavity. One end of the filter screen extends into the first receiving cavity and is detachably connected to the housing. Both ends of the impeller box abut against the bottom wall of the first receiving cavity and the filter screen, respectively.
6. The impeller shaft structure of the smart water meter according to claim 5, characterized in that: The bottom wall of the first accommodating cavity has a second recess, in which corundum is embedded, and the abutting part abuts against the corundum.
7. The impeller shaft structure of the smart water meter according to claim 4, characterized in that: One end of the wear-resistant pin is raised and lowered within the guide hole. The shaft also includes a second through hole, which communicates with the guide hole. The impeller shaft structure of the smart water meter also includes a top rod, which is raised and lowered within the second through hole, and one end of the top rod abuts against the wear-resistant pin.
8. The impeller shaft structure of the smart water meter according to claim 7, characterized in that: The second through hole has a retaining spring groove at one end, and a retaining spring is provided in the retaining spring groove. The retaining spring abuts against the end of the top rod that is away from the wear-resistant pin.