Impeller, base meter and irrigation water meter

Abstract

The utility model provides an impeller, a base meter and an irrigation water meter, and relates to the technical field of water meters, the impeller provided by the utility model is provided with a plurality of blades, and the plurality of blades are arranged at intervals along the circumferential direction of the impeller; the blade is provided with an upstream face and a downstream face, the area of the upstream face is larger than that of the downstream face, and the end, away from the axis of the impeller, of the downstream face is provided with a fillet part, the driving torque is increased, meanwhile, the resistance torque is reduced, the sensitivity of the water flow driving impeller is improved, and the impeller is particularly suitable for irrigation water meters, facilitates improvement of water meter performance and meets the requirement for the high range ratio.

Description

Technical Field

[0001] This utility model relates to the field of water meter technology, and in particular to an impeller, a base meter, and an irrigation water meter. Background Technology

[0002] Irrigation water meters are widely used in agricultural irrigation. The impeller, as a core component of irrigation water meters, has a structure that directly affects their performance. Due to the complex internal water flow within irrigation water meters, it is difficult to simulate and design them using precise mathematical models. Traditional impeller designs often rely on empirical methods, heavily depending on the designer's experience and intuition, lacking standardization and systematic approach, resulting in high trial-and-error costs. In particular, the high water flow resistance of the impeller leads to poor performance of the irrigation water meter, making it difficult to meet the requirements for high range ratios. Utility Model Content

[0003] The purpose of this invention is to provide an impeller, a base meter, and an irrigation water meter to alleviate the technical problem of excessive impeller flow resistance in the prior art.

[0004] Firstly, the impeller provided by this utility model has multiple blades, and the multiple blades are arranged at intervals along the circumference of the impeller;

[0005] The blade has a water-facing surface and a water-repellent surface, and the area of ​​the water-facing surface is larger than the area of ​​the water-repellent surface.

[0006] In conjunction with the first aspect, this utility model provides a first possible implementation of the first aspect, wherein the length of the water-facing surface is greater than the length of the water-repellent surface from one end near the impeller axis to one end away from the impeller axis.

[0007] In conjunction with the first aspect, this utility model provides a second possible implementation of the first aspect, wherein the end of the back surface away from the impeller axis is provided with a rounded corner portion, and the rounded corner portion protrudes in a direction away from the impeller axis.

[0008] In conjunction with the second possible implementation of the first aspect, this utility model provides a third possible implementation of the first aspect, wherein the rounded corner extends from the back surface to the front surface.

[0009] In conjunction with the second possible implementation of the first aspect, this utility model provides a fourth possible implementation of the first aspect, wherein the radius of the rounded corner is 2mm to 5mm.

[0010] In conjunction with the first aspect, this utility model provides a fifth possible implementation of the first aspect, wherein, from one end close to the impeller axis to one end away from the impeller axis, the blades are tilted in the direction from their water-facing side to their backwater side.

[0011] In conjunction with the first aspect, this utility model provides a sixth possible implementation of the first aspect, wherein the water-facing surface is parallel to the axis of the impeller.

[0012] In conjunction with the first aspect, this utility model provides a seventh possible implementation of the first aspect, wherein the number of blades is greater than 3.

[0013] Secondly, the base plate provided by this utility model is configured with the impeller described in the first aspect.

[0014] Thirdly, the irrigation water meter provided by this utility model is equipped with the impeller described in the first aspect.

[0015] The present invention provides the following beneficial effects: by using an impeller with multiple blades, the blades are arranged at intervals along the circumference of the impeller. The blades have a water-facing surface and a water-repellent surface, and the area of ​​the water-facing surface is larger than that of the water-repellent surface. This increases the driving torque while reducing the resistance torque, thereby improving the sensitivity of the water flow driving the impeller.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the impeller provided for an embodiment of this utility model.

[0019] Icons: 100 - blade; 101 - water-facing side; 102 - water-repelling side; 103 - rounded corner. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the impeller provided in this embodiment of the present invention has a plurality of blades 100, which are spaced apart along the circumference of the impeller; each blade 100 has a water-facing surface 101 and a water-returning surface 102, and the area of ​​the water-facing surface 101 is larger than the area of ​​the water-returning surface 102.

[0024] Specifically, the area of ​​the water-facing surface 101 is increased while the area of ​​the water-repellent surface 102 is decreased. This increases the driving torque while reducing the resistance torque, which can greatly improve the sensitivity of the water flow driving impeller. This is especially suitable for irrigation water meters, and it helps to improve the performance of the water meter and meet the requirements of a high range ratio.

[0025] In this embodiment of the invention, the length of the water-facing surface 101 from the end closest to the impeller axis to the end furthest from the impeller axis is greater than the length of the water-repellent surface 102.

[0026] Specifically, the upstream surface 101 is parallel to the impeller axis, and the downstream surface 102 can also be parallel to the impeller axis, or the impeller axis and the downstream surface 102 can be located on the same plane. Axially, the upstream surface 101 and the downstream surface 102 have the same dimensions, while radially, the upstream surface 101 is larger than the downstream surface 102. This allows the area of ​​the upstream surface 101 to be larger than the area of ​​the downstream surface 102, thereby increasing the driving force and reducing the resistance torque.

[0027] Furthermore, the end of the back surface 102 away from the impeller axis is provided with a rounded corner 103, which protrudes in the direction away from the impeller axis.

[0028] By setting the rounded corner 103, the direction of water flow resistance can be changed. The resistance acting on the rounded corner 103 points towards the impeller axis, thus reducing the resistance torque.

[0029] Furthermore, the rounded corner 103 extends from the back surface 102 to the front surface 101. By providing the rounded corner 103 at the end away from the impeller axis, the radial dimension of the back surface 102 can be shortened. The water flow resistance acting on the rounded corner 103 is directed towards the impeller axis, thereby minimizing the resistance torque.

[0030] It should be noted that the radius R of the rounded corner 103 is 2mm to 5mm. The size of the impeller and the radius R of the rounded corner 103 can be selected according to the technical requirements of the base meter or water meter. In the optional configuration, the radius R of the rounded corner 103 can be configured as 2.5mm. The radial dimension L1 of the water-facing surface 101 is 24.2mm, and the radial dimension of the water-returning surface is 16.4mm.

[0031] In an optional embodiment, from the end closest to the impeller axis to the end furthest from the impeller axis, the blade 100 is tilted in the direction from its water-facing surface 101 to its back surface 102.

[0032] In addition, the number of blades 100 is greater than 3. The number of blades 100 can be set to 4, 5 or 6, and can also be increased or decreased according to the test performance of the water meter.

[0033] The base plate provided in this embodiment of the utility model is configured with the impeller described in the above embodiments.

[0034] The irrigation water meter provided in this embodiment of the utility model is equipped with the impeller described in the above-described embodiments.

[0035] Both the base meter and the irrigation water meter possess the aforementioned impeller technology, which not only improves sensitivity but also meets the technical requirements for a high range ratio.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An impeller, characterized by, The impeller has a plurality of blades (100) arranged along the circumference of the impeller; The blade (100) has a water-facing surface (101) and a backwater surface (102), the area of the water-facing surface (101) being greater than that of the backwater surface (102); The backwater surface (102) is provided with a rounded portion (103) at one end away from the impeller axis, the rounded portion (103) being convex in the direction away from the impeller axis; The rounded portion (103) extends from the backwater surface (102) to the water-facing surface (101); From one end close to the impeller axis to one end away from the impeller axis, the blade (100) is inclined to the direction of the backwater surface (102) from the water-facing surface (101) of itself.

2. The impeller of claim 1, wherein From one end close to the impeller axis to one end away from the impeller axis, the length of the water-facing surface (101) is greater than that of the backwater surface (102).

3. The impeller of claim 1, wherein The radius of the rounded portion (103) is 2mm-5mm.

4. The impeller of claim 1, wherein The water-facing surface (101) is parallel to the axis of the impeller.

5. The impeller of claim 1, wherein The number of the blades (100) is greater than 3.

6. A base table, characterized by The base meter is provided with the impeller according to any one of claims 1-5.

7. An irrigation water meter, characterized by The irrigation water meter is provided with the impeller according to any one of claims 1-5.

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