CN215805538U - Airflow rectifying device - Google Patents

Abstract

The utility model discloses a rectifying device for airflow, relates to the field of gas metering, and solves the problem that the existing rectifying device is unstable in drainage when the airflow is too large, and the key points of the technical scheme are as follows: the flow guide device is characterized in that a flow channel for guiding air flow is arranged in the flow guide part, a rectifying part for rectifying the air flow is arranged at the tail end of the flow guide part flow channel, and the rectifying part is fixedly connected with the flow guide part. The utility model has the advantages that the airflow passes through the flow guide piece provided with the spiral groove flow channel to generate a rotating effect, and the honeycomb hole rectification coacts, so that the turbulence and the disorder of the airflow are reduced, the stability of the airflow is improved, and the pressure loss of the airflow is low.

Description

Airflow rectifying device

Technical Field

The utility model relates to the field of gas metering, in particular to a rectifying device for gas flow.

Background

At present, ultrasonic flow meters at home and abroad are used for stabilizing air flow and improving the stability of signals at a high flow rate, and require certain straight pipe sections, rectifiers at air inlet ends and other modes. At present, honeycomb holes or commutator segments are mostly adopted for gas rectifiers. Some incorporate fixed vanes to impart a rotating forward effect to the air flow.

However, the honeycomb system, the rectifying fins, and the like have a limited effect of stabilizing the gas flow, and the reinforcing of the stator blades to rotate the gas flow increases the pressure loss of the transmission, which causes deterioration in accuracy of the meter at a large flow rate or a pressure loss.

Therefore, the utility model is used for improving the problem of poor accuracy in large-flow metering.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the existing rectifying device is unstable to airflow when the airflow is too large, and aims to provide the rectifying device for the airflow, wherein the airflow generates a rotating effect through a device provided with a spiral groove runner, and the turbulence and the disorder of the airflow are reduced under the combined action of honeycomb hole rectification, and the pressure loss of the airflow is low.

The technical purpose of the utility model is realized by the following technical scheme:

the utility model provides a fairing of air current, includes the water conservancy diversion spare, be equipped with the runner that is used for carrying out the drainage to the air current in the water conservancy diversion spare, the end of water conservancy diversion spare runner is equipped with the fairing that is used for the air current rectification, the fairing with water conservancy diversion spare fixed connection.

The flow channel for guiding the air flow is arranged in the flow guide piece, the rectifying piece for rectifying the guided air flow is arranged at the air flow outlet end of the flow channel, the air flow generates a rotary air flow in the flow guide piece, and the rotary air flow enters the rectifying piece at the outlet of the flow channel to generate a rectifying effect on the air flow, so that the turbulence and the disorder of the air flow are reduced, and the effect of stabilizing the flow is achieved.

Further, a spiral line groove is formed in the inner wall of the flow channel, the wall surface of the spiral line groove is a smooth curved surface, and the section of the smooth curved surface is an arc curved surface.

By adopting the technical scheme, the smooth curved surface is adopted on the inner wall of the spiral line groove of the flow channel so as to reduce the pressure loss of the air flow.

Further, the winding ratio of the spiral groove is kept unchanged.

By adopting the technical scheme, the spiral air flow is generated through the spiral line grooves, the winding ratio is kept unchanged, namely the distance between the spiral line grooves is equal, and the acting force is ensured to be balanced.

Furthermore, an included angle between the spiral line of the spiral line groove and the cross section of the rectifying piece is 15-30 degrees.

By adopting the technical scheme, the number of turns of the spiral line grooves in the flow guide piece is more, the rotating effect of the airflow around the forward central shaft is stronger, and the length of the flow guide piece is limited, so that the rotating airflow is generated in a limited distance, and the angle between the spiral line grooves is required to be ensured within a certain range so as to ensure the rotating effect of the airflow.

Furthermore, a plurality of through holes are formed in the rectifying piece, and the through holes are distributed in a honeycomb shape.

Adopt above-mentioned technical scheme, open a plurality of honeycomb holes in order to realize carrying out the effect of rectification at the air current of rotation at the side of fairing.

Furthermore, flanges are arranged at two ends of the flow guide piece, and the flanges and the rectifying device are integrally formed.

By adopting the technical scheme, the flange plate enables the device to be more conveniently connected with the pipeline and the flowmeter.

Furthermore, the shape of the flow guide part is a circular pipeline, and the shape of the rectifying part is a circular truncated cone.

Adopt above-mentioned technical scheme, the shape of water conservancy diversion spare is circular pipeline, sets up the spiral line groove in inside, and the inner wall of spiral line groove all is smooth curved surface, can reduce the pressure loss of air current, because the water conservancy diversion spare is circular pipeline to water conservancy diversion spare and fairing fixed connection, therefore the shape of fairing makes better fixed the linking of fairing and water conservancy diversion spare for the round platform shape.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a rectifying device for airflow, wherein the airflow firstly enters a pipe section of the rectifying device which is provided with a spiral groove, when the airflow flows forwards in a pipeline, the airflow generates a rotation effect around a spiral axis, and due to the rotation effect generated by the airflow passing through the pipe section provided with the spiral groove and the combined action of honeycomb hole rectification, the turbulence and the disorder of the airflow are reduced, the pressure loss is low, the fluctuation of ultrasonic signals in large flow can be reduced, and the metering performance is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is an axial cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of a fairing of the present invention.

Reference numbers and corresponding part names in the drawings:

1. a flow guide member; 2. a fairing; 3. a spiral wire groove; 4. a through hole; 5. a flange plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

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 invention, "a plurality" means two or more unless specifically defined otherwise.

Examples

The embodiment provides a rectifying device for airflow, as shown in fig. 1, the rectifying device comprises a flow guide part 1, a flow channel for guiding the airflow is arranged in the flow guide part 1, a rectifying part 2 for rectifying the airflow is arranged at the tail end of the flow channel of the flow guide part 1, and the rectifying part 2 is fixedly connected with the flow guide part 1.

The working principle is as follows: through set up the runner that carries out the drainage to the air current in water conservancy diversion spare 1 to set up at the air current exit end of runner and carry out the fairing 2 of rectification to the air current after the drainage, the air current produces rotatory antecedent air current in water conservancy diversion spare 1, and rotatory air current gets into the fairing 2 in the exit of runner and acts on the rectification of air current, makes the torrent and the disorder of air current reduce, reaches the effect of rectification and drainage.

Preferably, the inner wall of the flow channel is provided with a spiral line groove 3, the wall surface of the spiral line groove 3 is a smooth curved surface, and the section of the smooth curved surface is an arc curved surface. The smooth curved surface is adopted by the inner wall of the flow passage to reduce the pressure loss of the airflow.

Preferably, the winding ratio of the spiral groove 3 is kept constant. The spiral line grooves 3 generate airflow which rotates forwards, and the winding ratio is kept unchanged, namely the intervals of the spiral line grooves 3 are equal, so that the acting force is ensured to be balanced.

Preferably, the angle between the helix of the helical groove 3 and the cross-section of the fairing 2 is 15-30 degrees. The more 3 circles of spiral groove in water conservancy diversion spare 1, the stronger is the rotatory effect of air current around advancing the center pin, because the length of water conservancy diversion spare 1 is limited, consequently will produce rotatory air current in limited distance, will guarantee that the angle between the cross section of helix and fairing 2 is in certain extent for guarantee the rotatory effect of air current.

Preferably, as shown in fig. 2, the fairing 2 is provided with a plurality of through holes 4, and the through holes 4 are distributed in a honeycomb shape. The side of the fairing 2 is provided with a plurality of honeycomb holes to realize the function of rectifying the rotating airflow.

Preferably, as shown in fig. 2, flanges 5 are provided at both ends of the flow guide member 1, and the flanges 5 are integrally formed with the rectifying device. The flange 5 facilitates the connection of the device to the pipe and the flow meter.

Preferably, as shown in fig. 1, the flow guide member 1 is in the shape of a circular pipe, and the flow straightening member 2 is in the shape of a circular truncated cone. The shape of water conservancy diversion spare 1 is circular pipeline, sets up spiral line groove 3 at the inner wall, and the internal face of the spiral line groove 3 of runner all is smooth curved surface, can reduce the pressure loss of air current, because water conservancy diversion spare 1 is circular pipeline to water conservancy diversion spare 1 and fairing 2 fixed connection, consequently the shape of fairing 2 makes fairing 2 and the better fixed linking of water conservancy diversion spare 1 for the round platform shape.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The rectifying device for the airflow is characterized by comprising a flow guide part (1), a flow channel for guiding the airflow is arranged in the flow guide part (1), a rectifying part (2) for rectifying the airflow is arranged at the tail end of the flow channel of the flow guide part (1), and the rectifying part (2) is fixedly connected with the flow guide part (1).

2. The airflow rectifying device according to claim 1, wherein a spiral slot (3) is formed on the inner wall of the flow channel, the wall surface of the spiral slot (3) is a smooth curved surface, and the section of the smooth curved surface is a circular arc curved surface.

3. A device for rectifying a gas flow according to claim 2, characterized in that the winding ratio of said spiral groove (3) is kept constant.

4. A device for rectifying a gas flow according to claim 3, characterized in that the angle between the helix of said helical groove (3) and the cross-section of the rectifying member (2) is 15-30 degrees.

5. A device according to claim 1, characterised in that said rectifying member (2) is provided with a plurality of through holes (4), said through holes (4) being distributed in the form of a honeycomb.

6. A device for rectifying a gas flow according to claim 1, characterized in that said deflector (1) is provided at both ends with flanges (5), said flanges (5) being integrally formed with the rectifying device.

7. A device according to claim 1, characterised in that the flow-guiding member (1) is shaped as a circular tube and the fairing member (2) is shaped as a truncated cone.

Images