CN209783654U

CN209783654U - closed contactless flowmeter

Info

Publication number: CN209783654U
Application number: CN201920245641.1U
Authority: CN
Inventors: 吴科学; 王晋; 韩冬; 刘鹏展
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2019-12-13
Anticipated expiration: 2029-02-27

Abstract

A closed non-contact flowmeter comprises a flow speed acquisition mechanism and a flow speed detection mechanism connected with the flow speed acquisition mechanism, wherein the flow speed acquisition mechanism comprises a fluid pipeline, a vertical rod perpendicular to the flow direction of fluid is arranged in the fluid pipeline, a rotating bearing is arranged outside the vertical rod, and a driven blade is arranged outside the rotating bearing; and a rotating blade matched with the follow-up blade is arranged in the flow velocity acquisition mechanism. This application adopts two parts mechanism, the collection of the velocity of flow collection mechanism and the velocity of flow detection mechanism separation velocity of flow promptly and the detection of velocity of flow to avoid the blade on the velocity of flow collection mechanism with fluid direct contact to pollute and influence the accuracy of whole measurement.

Description

Closed contactless flowmeter

Technical Field

The present application relates to a closed contact-less flow meter.

Background

An impeller or blade type flowmeter is a device for measuring flow by applying the principle of moment of momentum of fluid. The impeller type flowmeter has the working principle that an impeller or blades are placed in a measured fluid and rotate under the impact of the flowing fluid, and the flow rate is reflected by the rotation speed of the impeller. Typical impeller-type flow meters are water meters and turbine flow meters, which may be configured in either a mechanical drive output or an electrical pulse output. The water meter output by the general mechanical transmission has lower accuracy, the error is about +/-2%, but the water meter has simple structure and low manufacturing cost, is produced in batches in China and is standardized, generalized and serialized. However, in some fields, the accuracy of the fluid may be greatly reduced because the fluid may contain impurities such as iron chips which affect the rotation speed of the blade.

CN104428632A a flowmeter for liquids, comprising a measurement housing (10) enclosing and rotatably mounting an impeller (50), said measurement housing comprising an integrated supply pipe (12) and discharge pipe (13), wherein vanes are eccentrically arranged in the discharge pipe (13) after the nozzle forms a constriction (14). A sensor encoder is associated with the impeller and a sensor (90) responsive to the sensor encoder is disposed on the measurement housing (10) for determining an amount of liquid flowing through the measurement housing (10) based on a number of revolutions of the impeller. The external diameter corresponding to the impeller is smaller than the nominal internal diameter of the discharge pipe (13), so that it is pushed into the integrated pipes (12, 13).

CN101750118A discloses a composite impeller type flowmeter, which comprises a flowmeter shell, wherein a flow guide pipe expansion assembly and a central sleeve pipe are arranged in the shell, are sleeved together in the front and back direction of the flow inflow direction of fluid and are arranged coaxially with the shell; the middle part in the central sleeve is provided with an impeller chamber for accommodating a rotating impeller, an impeller shaft of the rotating impeller is radially arranged and supported in the impeller chamber along the shell, and impeller blades are arranged in the middle of the impeller shaft; the outer end of a sensor bracket with a built-in sensor is fixedly arranged on the shell in a penetrating way, the inner end of the sensor bracket penetrates through the central sleeve on the corresponding side to extend into the impeller chamber, and the signal acquisition end of the sensor is aligned with the impeller blade. A sensor which directly senses the impeller blades is arranged in the shell and outputs an electric signal, so that the fluid is metered, and the signal transmission is prevented from being interfered by the outside; a flow guide pipe expansion assembly for expanding the flow measurement range is sleeved at the front part of the central sleeve pipe so as to balance the flow velocity of the medium in the pipeline; on the premise of ensuring the metering precision, the sensitivity of small flow is improved, the pressure loss of large flow is reduced, and the flow measurement range is enlarged.

The above two patents essentially utilize various technical features to obtain a high-precision measurement result, but the technical problem that the blade speed measurement is possibly influenced by the impurities contained in the blade does not obtain an industrially feasible technical solution.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a closed contact-less flow meter, which includes a flow rate collecting mechanism and a flow rate detecting mechanism connected to the flow rate collecting mechanism, wherein the flow rate collecting mechanism includes a fluid pipeline, a vertical rod is disposed in the fluid pipeline and perpendicular to the flow direction of the fluid, a rotating bearing is disposed outside the vertical rod, and a moving blade is disposed outside the rotating bearing; and a rotating blade matched with the follow-up blade is arranged in the flow velocity acquisition mechanism. This application adopts two parts mechanism, the collection of the velocity of flow collection mechanism and the velocity of flow detection mechanism separation velocity of flow promptly and the detection of velocity of flow to avoid the blade on the velocity of flow collection mechanism with fluid direct contact to pollute and influence the accuracy of whole measurement.

Preferably, the rotary bearing extends out of the fluid pipeline and is fixedly connected with the rotary blade. The rotary bearing plays a role in connecting the flow rate acquisition mechanism and the flow rate detection mechanism, and the measurement reliability can be ensured due to the hard connection.

Preferably, a sealing ring is arranged between the rotary bearing and the pipeline wall of the fluid pipeline. The sealing performance of the flow velocity acquisition mechanism is ensured.

Preferably, the follow-up blade comprises a blade main body, and at least 5 sub-blades are distributed on the blade main body around the vertical rod.

Preferably, the sub-blade comprises a first side surface arranged close to the blade body and a second side surface arranged far away from the blade body, and a connecting surface is arranged between the first side surface and the second side surface.

Preferably, the first side surface extends in a direction tangential to an outer surface of the rotary bearing.

Preferably, the second side surface extends in a direction tangential to the outer surface of the blade body. The design of the sub-blades is redesigned, and the interference of the sub-blades on the fluid flow can be reduced as much as possible by adopting the design; and the adhesion of impurities in the fluid to the sub-blades can be reduced.

Preferably, a rotational speed measuring instrument for measuring the rotational speed of the rotary blade is further provided in the flow rate detection mechanism. The rotating speed of the rotating blade is measured by using the rotating speed measuring instrument, and then the flow speed of the fluid can be corrected and calculated according to the rotating speed.

Preferably, a concave cavity is formed in one side, far away from the flow velocity acquisition mechanism, of the rotating blade. The resistance of the rotating blade in the rotating process is reduced, and the self weight of the rotating blade is reduced.

preferably, the flow rate acquisition mechanism and the flow rate detection mechanism are integrally arranged, connecting flanges are arranged at two ends of the fluid pipeline, and the flow rate detection mechanism is arranged in a sealing manner. The connecting flange is used for being connected with the outside, and the sealing arrangement of the flow velocity detection mechanism is used for improving the stability of the flow velocity detection mechanism.

this application can bring following beneficial effect:

1. The flow velocity acquisition mechanism and the flow velocity detection mechanism are adopted to separate the acquisition of the flow velocity and the detection of the flow velocity, so that the blade pollution on the flow velocity acquisition mechanism which is directly contacted with the fluid is avoided to influence the accuracy of the integral measurement;

2. The rotating bearing plays a role in connecting the flow rate acquisition mechanism and the flow rate detection mechanism, and the measurement reliability can be ensured due to the hard connection;

3. The design of the sub-blades is redesigned, and the interference of the sub-blades on the fluid flow can be reduced as much as possible by adopting the design; and the adhesion of impurities in the fluid to the sub-blades can be reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural diagram of the present application;

Fig. 2 is a schematic structural diagram of a flow rate acquisition mechanism.

Detailed Description

In order to clearly explain the technical features of the present invention, the present application will be explained in detail by the following embodiments in combination with the accompanying drawings.

As shown in the drawings, the following detailed description is given by way of example in order to more clearly explain the overall concept of the present application.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In an embodiment, as shown in fig. 1-2, a closed contact-less flow meter includes a flow rate collecting mechanism 20 and a flow rate detecting mechanism 30 connected to the flow rate collecting mechanism 20, where the flow rate collecting mechanism 20 includes a fluid pipeline 1, a vertical rod 2 is disposed in the fluid pipeline 1 and perpendicular to the flow direction of the fluid, a rotary bearing 3 is disposed outside the vertical rod 2, and a follower blade 4 is disposed outside the rotary bearing 3; the flow velocity collection mechanism 20 is provided with a rotary blade 5 which is matched with the follower blade 4. This application adopts two parts mechanism, the collection of velocity of flow and the detection of velocity of flow that velocity of flow acquisition mechanism 20 and velocity of flow detection mechanism 30 separation velocity of flow to avoid polluting and influence the accuracy of whole measurement with the blade on the velocity of flow acquisition mechanism 20 of fluid direct contact. The rotary bearing 3 extends out of the fluid pipeline 1 and is fixedly connected with the rotary blade 5. The rotary bearing 3 plays a role of connecting the flow rate collection mechanism 20 and the flow rate detection mechanism 30, and the reliability of measurement can be ensured due to the hard connection. A sealing ring is arranged between the rotary bearing 3 and the pipeline wall of the fluid pipeline 1. The sealing performance of the flow rate collection mechanism 20 is ensured. The follow-up blade 4 comprises a blade main body 6, and at least 5 sub-blades 7 are distributed on the blade main body 6 around the vertical rod 2. The sub-blade 7 comprises a first side 8 arranged close to the blade body 6 and a second side 9 arranged remote from the blade body 6, a connection surface 10 being arranged between the first side 8 and the second side 9. The first side 8 extends tangentially to the outer surface of the rotary bearing 3. The second side 9 extends tangentially to the outer surface of the blade body 6. The design of the sub-blades 7 is redesigned, and the interference of the sub-blades 7 on the fluid flow can be reduced as much as possible by adopting the design; and the adhesion of impurities in the fluid to the sub-blades 7 can be reduced. A rotational speed measuring instrument 11 for measuring the rotational speed of the rotary blade 5 is also provided in the flow rate detecting mechanism 30. By measuring the rotational speed of the rotary blade 5 with the rotational speed measuring instrument 11, the flow rate of the fluid can be corrected and calculated based on the rotational speed. The side of the rotating blade 5 away from the flow rate collecting mechanism 20 is provided with a concave cavity 12. The resistance during the rotation of the rotary blade 5 is reduced and the self weight of the rotary blade 5 is reduced. The flow rate acquisition mechanism 20 and the flow rate detection mechanism 30 are integrally arranged, the two ends of the fluid pipeline 1 are provided with connecting flanges 12, and the flow rate detection mechanism is arranged in a sealing manner. The connecting flange is used for being connected with the outside, and the sealing arrangement of the flow velocity detection mechanism is used for improving the stability of the flow velocity detection mechanism. During the use, the fluid flows to the right side from the left side of figure 1, and the fluid can drive sub-blade 7 rotatory, then follow-up blade 4 motion, and follow-up blade 4 can be with the simultaneous movement of rotating bearing 3, and rotating bearing 3 moves with rotating blade 5, therefore this application can be with inside follow-up blade 4 the rotation information synchronous transfer to rotating blade 5 on, then to rotating blade 5 carry out the state monitoring can.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A closed contactless flowmeter is characterized in that: the flow velocity detection device comprises a flow velocity acquisition mechanism and a flow velocity detection mechanism connected with the flow velocity acquisition mechanism, wherein the flow velocity acquisition mechanism comprises a fluid pipeline, a vertical rod which is perpendicular to the flow direction of fluid is arranged in the fluid pipeline, a rotating bearing is arranged outside the vertical rod, and a moving blade is arranged outside the rotating bearing; and a rotating blade matched with the follow-up blade is arranged in the flow velocity acquisition mechanism.

2. A closed contact-less flow meter as set forth in claim 1, wherein: and the rotating bearing extends out of the fluid pipeline and is fixedly connected with the rotating blade.

3. A closed contact-less flow meter as set forth in claim 2, wherein: and a sealing ring is arranged between the rotary bearing and the pipeline wall of the fluid pipeline.

4. A closed contact-less flow meter as set forth in claim 1, wherein: the follow-up blade comprises a blade main body, wherein at least 5 sub-blades are distributed on the blade main body around the vertical rod.

5. A closed contact-less flow meter as set forth in claim 4, wherein: the sub-blade comprises a first side face and a second side face, the first side face is close to the blade main body, the second side face is far away from the blade main body, and a connecting face is arranged between the first side face and the second side face.

6. A closed contact-less flow meter as set forth in claim 5, wherein: the extending direction of the first side face is tangent to the outer surface of the rotary bearing.

7. A closed contact-less flow meter as set forth in claim 5, wherein: the extending direction of the second side face is tangential to the outer surface of the blade body.

8. A closed contact-less flow meter as set forth in claim 1, wherein: and a rotating speed measuring instrument for measuring the rotating speed of the rotating blade is also arranged in the flow speed detecting mechanism.

9. A closed contact-less flow meter as set forth in claim 1, wherein: and a concave cavity is formed in one side of the rotating blade, which is far away from the flow speed acquisition mechanism.

10. a closed contact-less flow meter as set forth in claim 1, wherein: the flow rate acquisition mechanism and the flow rate detection mechanism are integrally arranged, connecting flanges are arranged at two ends of the fluid pipeline, and the flow rate detection mechanism is arranged in a sealing mode.