CN213147949U - Built-in rectifier of gas ultrasonic flowmeter of Internet of things - Google Patents

Abstract

The application relates to the technical field of gas metering devices, and discloses a built-in rectifier of gaseous ultrasonic flowmeter of thing networking, including setting gradually and coaxial rectifier blade, development chamber and airflow channel, rectifier blade covers the rectifier air inlet completely along the projection of rectifier axis direction, airflow channel's transversal personally submitting is cellular. The ultrasonic flowmeter has the advantages that the problem of measurement errors caused by airflow disturbance of the ultrasonic flowmeter is effectively solved, the airflow in the flowmeter is set to a relatively ideal measurement condition through the internal three-section type rectifying structure, and the flow velocity of the rectified airflow is uniform and stable.

Description

Built-in rectifier of gas ultrasonic flowmeter of Internet of things

Technical Field

The application relates to the technical field of gas metering devices, in particular to a built-in rectifier of an Internet of things gas ultrasonic flowmeter.

Background

The gas ultrasonic flowmeter is a novel flow measuring instrument working by utilizing the ultrasonic acoustic principle, and compared with the traditional flowmeter, the gas ultrasonic flowmeter has the advantages of stable operation, easy installation, accurate and reliable measurement, non-contact measurement, wide range ratio, small pressure loss, energy conservation and the like, is an ideal energy-saving flowmeter, and has great advantages in the aspects of high-pressure and large-diameter flow measurement. When the gas ultrasonic flowmeter is installed, the gas flow can be ensured to be stable only by respectively meeting the requirements of straight pipe sections with certain lengths at the gas inlet end and the gas outlet end, and high-precision and high-reliability metering is realized. However, the actual installation environment on site is not uniform, and the requirements of the straight pipe section cause difficulties to site construction and even cannot meet the use requirements, so a rectifier is usually installed in the pipeline to improve the distribution condition of the fluid.

At present, the rectification effect of the existing gas rectifier on the market is not ideal, and the measurement error of the ultrasonic flowmeter is large when the gas rectifier is used. For example, in the prior art, the utility model discloses a utility model patent with publication number CN208536931U, publication date of 2019, 22.02/2019, entitled "a reflective multichannel ultrasonic gas flowmeter flow channel", and its technical scheme is: the utility model provides a reflecting multi-channel ultrasonic gas flowmeter flow channel, which comprises a straight-through pipeline, wherein the straight-through pipeline is provided with an inlet end and an outlet end; a plurality of ultrasonic transducer groups are arranged on the straight-through pipeline, and a gas rectification structure is arranged on one side of the straight-through pipeline close to the inlet end; the gas rectifying structure comprises a gas flow channel with a honeycomb-shaped cross section, and the gas flow channel is axially and integrally parallel to the straight-through pipeline. The beneficial effects of the utility model reside in that: on one hand, the ultrasonic flow meter can be suitable for shorter straight-through pipelines, the occupied volume of a flow passage of the gas flow meter is reduced, and on the other hand, ultrasonic measurement is more stable and accurate.

Although the gas rectifying structure is arranged on one side close to the inlet end in the straight-through pipeline in the prior art, the rectified gas is not uniform enough, and the distribution condition of the gas is not ideal enough.

Disclosure of Invention

Aiming at the problems and the defects in the prior art, the built-in rectifier of the gas ultrasonic flowmeter of the Internet of things is provided, the gas flow in the flowmeter is set to a relatively ideal measuring condition through the internal rectifying structure, and the measuring error of the ultrasonic flowmeter caused by gas flow disturbance is solved.

In order to achieve the above object, the technical solution of the present application is as follows:

the built-in rectifier of the gas ultrasonic flowmeter of the Internet of things comprises a rectifying blade, a development cavity and an airflow channel which are sequentially arranged and coaxial, wherein the projection of the rectifying blade in the axis direction of the rectifier completely covers an air inlet of the rectifier, and the cross section of the airflow channel is honeycomb-shaped.

Preferably, the total length S of the rectifying blade, the developing cavity and the airflow channel along the axial direction of the rectifier is 0.8-1.2D, and D is the inner diameter of the fluid pipeline.

Preferably, the length S1 of the rectifying blade along the axial direction is 0.15-0.3D.

Preferably, the length S2 of the development cavity along the axial direction is 0.2-0.5D.

Preferably, the length S3 of the airflow channel along the axial direction is 0.3-0.6D.

Preferably, the space between the straightening vanes and the air flow passage forms the developing chamber.

Preferably, the rectifying blades are arranged in a radial rotating manner.

Preferably, the airflow channel is parallel to the axis of the rectifier and comprises a plurality of airflow units with hexagonal cross sections.

The beneficial effect of this application:

(1) the flow meter has the advantages that the problem of measurement errors caused by air flow disturbance of the ultrasonic flow meter is effectively solved, the air flow in the flow meter is set to a relatively ideal measurement condition through the internal three-section type rectification structure, and the flow velocity of the rectified air flow is uniform and stable.

(2) This application is connected through arranging in proper order of rectifier blade, development chamber and airflow channel and is made the route of air current shorten to the whole length of rectifier that has shortened greatly, consequently, the rectifier of this application is applicable to various installation environment.

(3) In this application, the rectifier air inlet is covered completely at the projection of axis direction to the rectifier blade, so, the rectifier blade is an impervious plane at axial projection, can avoid the air current to directly penetrate into and develop the intracavity, consequently, the air current can be disturbed by abundant under the effect of rectifier blade, and the rectification effect is better.

(4) In the application, the cross section of the airflow unit is hexagonal, so that the wind resistance of the cross section can be reduced as much as possible, and the airflow is smoothly straightened.

Drawings

The foregoing and following detailed description of the present application will become more apparent when read in conjunction with the following drawings, wherein:

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

FIG. 2 is a front view of the present application;

fig. 3 is a schematic view of the structure of the air flow channel of the present application.

In the figure:

1. a rectifying blade; 2. a development chamber; 3. an air flow channel; 4. a rectifier air inlet; 5. a fluid conduit; 31. and an air flow unit.

Detailed Description

The technical solutions for achieving the objects of the present invention are further described below by using several specific examples, and it should be noted that the technical solutions claimed in the present application include, but are not limited to, the following examples.

Example 1

The embodiment discloses a built-in rectifier of an internet-of-things gas ultrasonic flowmeter, the rectifier is arranged inside the ultrasonic flowmeter and is positioned at the inlet end of a fluid pipeline 5, referring to the attached drawings 1-3 in the specification, coaxial rectifying blades 1, a development cavity 2 and an air flow channel 3 are sequentially arranged from an air inlet to an air outlet of the fluid pipeline 5, the three-section rectifying structure is directly embedded in the fluid pipeline 5, the projection of the rectifying blades 1 in the axial direction of the rectifier completely covers an air inlet 4 of the rectifier, as the three-section rectifying structure is directly embedded in the fluid pipeline 5, the air inlet 4 of the rectifier is the air inlet of the fluid pipeline 5 of the ultrasonic flowmeter, the two are the same, further, the development cavity 2 is a cavity and is formed by the space between the rectifying blades 1 and the air flow channel 3, further, the cross section of the air flow channel 3 is honeycomb-shaped.

Further, referring to the attached figure 1 of the specification, the total length S of the three parts of the rectifying blade 1, the developing cavity 2 and the airflow channel 3 along the axial direction of the rectifier is 0.8-1.2D, and D is the inner diameter of the fluid pipeline 5. The three rectifying parts are compact in structure, and the total length S is 0.8-1.2D, so that internal assembly can be well realized.

Further, referring to fig. 1 of the specification, the length S1 of the straightening vane 1 in the axial direction is 0.3D.

Further, with reference to the description of fig. 1, the development chamber 2 has a length S2 in the axial direction of 0.3D. The gas flow can be stirred well in this development chamber.

Further, referring to fig. 1 of the specification, the length S3 of the airflow passage 3 in the axial direction is 0.6D.

Further, referring to the attached fig. 2 of the specification, the rectifying blades 1 are arranged in a radial rotating manner.

Further, referring to fig. 3 of the specification, the airflow channel 3 is parallel to the axis of the rectifier and includes a plurality of airflow units 31 having a hexagonal cross section. The airflow channel is a combination of a plurality of airflow units with hexagonal cross sections, so that the wind resistance of the cross sections can be reduced as much as possible, and the airflow can be smoothly straightened.

Example 2

The built-in rectifier of the internet-of-things gas ultrasonic flowmeter is the same as that of the embodiment 1 except for the lengths of the rectifying blades 1, the development cavity 2 and the gas flow channel 3 in the axial direction.

The length S1 of the flow straightening vane 1 in the axial direction is 0.2D.

The length S2 of the development chamber 2 in the axial direction is 0.2D.

The length S3 of the airflow passage 3 in the axial direction is 0.4D.

Example 3

The embodiment discloses a built-in rectifier of an internet-of-things gas ultrasonic flowmeter, wherein the rectifier is arranged inside the ultrasonic flowmeter and is positioned at an inlet end of a fluid pipeline 5, the rectifier is different from the rectifier 1 in the embodiment, a three-section type rectifying structure in the embodiment is firstly sequentially embedded in a straight-through pipeline, then the straight-through pipeline is arranged at the inlet end of the fluid pipeline 5 of the ultrasonic flowmeter, the cross section of the straight-through pipeline is circular, two ends of the straight-through pipeline are open, one opening is a straight-through pipeline air inlet, the other opening is a straight-through pipeline air outlet, coaxial rectifying blades 1, a development cavity 2 and an airflow channel 3 are sequentially arranged from the straight-through pipeline air inlet to the straight-through pipeline air outlet, the projection of the rectifying blades 1 in the axial direction of the straight-through pipeline 1 completely covers the straight-through pipeline, formed by the space between the straightening vanes 1 and the air flow channel 3.

Furthermore, the inner diameter of the straight-through pipeline is the same as that of the fluid pipeline 5 and is D, and the total length S of the three parts, namely the rectifying blade 1, the development cavity 2 and the airflow channel 3, along the axial direction of the straight-through pipeline is 0.8-1.2D. The inner diameter of the whole rectifier is the same as that of the fluid pipeline, the three parts are compact in structure, the total length S is 0.8-1.2D, and internal assembly can be well achieved.

Further, the length S1 of the flow straightening vane 1 in the axial direction is 0.3D.

Further, the length S2 of the development chamber 2 in the axial direction is 0.3D. The gas flow can be stirred well in this development chamber.

Further, the length S3 of the airflow passage 3 in the axial direction is 0.6D.

Further, the rectifying blades 1 are arranged in a radial rotating manner.

Further, the airflow channel 3 is parallel to the axis of the rectifier and includes a plurality of airflow units 31 with hexagonal cross sections. The airflow channel is a combination of a plurality of airflow units with hexagonal cross sections, so that the wind resistance of the cross sections can be reduced as much as possible, and the airflow can be smoothly straightened.

Example 4

The built-in rectifier of the internet-of-things gas ultrasonic flowmeter is the same as that of the embodiment 3 except for the lengths of the rectifying blades 1, the development cavity 2 and the gas flow channel 3 in the axial direction.

The length S1 of the flow straightening vane 1 in the axial direction is 0.2D.

The length S2 of the development chamber 2 in the axial direction is 0.2D.

The length S3 of the airflow passage 3 in the axial direction is 0.4D.

The overall working principle of the device is as follows:

in practical application, turbulent airflow firstly enters the rectifying blades through the air inlet, the rectifying blades are arranged in a radiation rotating shape, the airflow is completely disturbed under the action of the rectifying blades and then enters the development cavity, the airflow is buffered in the development cavity and fully stirred and mixed to form new rotating airflow which is uniformly distributed, and finally the rotating airflow enters the airflow channel and is straightened under the action of a plurality of airflow units with hexagonal cross sections to finally form airflow with stable and uniform flow velocity, so that the measurement error of the ultrasonic flowmeter is reduced.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The foregoing is directed to embodiments of the present invention, which are not limited thereto, and any simple modifications and equivalents thereof according to the technical spirit of the present invention may be made within the scope of the present invention.

Claims (8)

1. The utility model provides a gaseous ultrasonic flowmeter of thing networking embeds rectifier which characterized in that: the air flow rectifier comprises a rectifier blade (1), a development cavity (2) and an air flow channel (3) which are sequentially arranged and coaxial, wherein the projection of the rectifier blade (1) in the axis direction of the rectifier completely covers an air inlet (4) of the rectifier, and the cross section of the air flow channel (3) is honeycomb-shaped.

2. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 1, wherein: the total length S of the three parts, namely the rectifying blade (1), the development cavity (2) and the airflow channel (3), along the axial direction of the rectifier is 0.8-1.2D, and D is the inner diameter of the fluid pipeline (5).

3. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 2, wherein: the length S1 of the rectifying blade (1) along the axial direction is 0.15-0.3D.

4. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 2, wherein: the length S2 of the development cavity (2) along the axial direction is 0.2-0.5D.

5. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 2, wherein: the length S3 of the airflow channel (3) along the axial direction is 0.3-0.6D.

6. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 1, wherein: the space between the straightening vane (1) and the air flow channel (3) forms the development chamber (2).

7. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 1, wherein: the rectifying blades (1) are arranged in a radiation rotating manner.

8. The built-in rectifier of the internet of things gas ultrasonic flowmeter as claimed in claim 1, wherein: the airflow channel (3) is parallel to the axis of the rectifier and comprises a plurality of airflow units (31) with hexagonal cross sections.

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