CN215374086U

CN215374086U - Cross section flowmeter

Info

Publication number: CN215374086U
Application number: CN202121415291.2U
Authority: CN
Inventors: 刘立国; 刘志凯
Original assignee: Liaoning Focus Industrial Fluid Science Institute
Current assignee: Liaoning Focus Industrial Fluid Science Institute
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-12-31
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a cross section flowmeter, which comprises a pipeline, a positive pressure guide pipe, a negative pressure guide pipe, a flow straightener, a positive pressure measuring and guiding pipe, a negative pressure side pressure guide pipe and a differential pressure transmitter, wherein the positive pressure guide pipe and the negative pressure guide pipe are vertically arranged, the positive pressure guide pipe and the negative pressure guide pipe are both vertical to the pipeline, the flow straightener is arranged at 1/2 times of the inner diameter of the pipeline in front of the positive pressure guide pipe, the positive pressure guide pipe is connected with the positive pressure side of the differential pressure transmitter through the positive pressure measuring and guiding pipe, and the negative pressure guide pipe is connected with the negative pressure side of the differential pressure transmitter through the negative pressure measuring and guiding pipe. Compared with the prior art, the utility model has the beneficial effects that: 1) the positive pressure guide pipe and the negative pressure guide pipe are vertically arranged, so that a differential pressure value obtained by the flowmeter can reflect the flow velocity on the whole section, the measurement is more accurate, and meanwhile, the flow straightener is arranged in front of the flowmeter, so that the requirement of a front straight pipe section is further reduced.

Description

Cross section flowmeter

Technical Field

The utility model relates to the field of flow measurement, in particular to a cross section flowmeter.

Background

Due to the characteristics of simple structure, small pressure loss, convenient installation, online installation and the like, the bar-type flowmeter (uniform velocity tube-type flowmeter) is widely applied to industrial production and has various forms, such as Anoba, Weiliba, Deltaba and the like.

However, in the conventional bar-type flowmeter, positive and negative pressure sampling is usually designed on a straight rod, the obtained pressure difference can only reflect the flow velocity of the fluid on the straight line, and if the flow distribution in the pipeline is not uniform, errors are easy to generate.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a cross-sectional flow meter that solves the above-mentioned problems of the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a cross section flowmeter, includes the pipeline, positive pressure pipe, negative pressure pipe, and the straightener that flows, positive pressure side pressure pipe, negative pressure side pressure pipe, differential pressure transmitter, positive pressure pipe and negative pressure pipe mutually perpendicular installation, positive pressure pipe and negative pressure pipe all are mutually perpendicular with the pipeline, the distance between positive pressure pipe and the negative pressure pipe is 1/2 of pipeline internal diameter, be equipped with the straightener in the pipeline, the distance of flowing straightener and positive pressure pipe is 1/2 of pipeline internal diameter, positive pressure pipe passes through positive pressure side pressure pipe and is connected with differential pressure transmitter's positive pressure side, negative pressure pipe passes through negative pressure side pressure pipe and is connected with differential pressure transmitter's negative pressure side.

The positive pressure guide pipe and the negative pressure guide pipe are hollow pipes.

The positive pressure guide pipe is provided with three pressure taking ports, wherein one pressure taking port is arranged at the right center of the pipeline, and the other two pressure taking ports are arranged at the 1/2 position of the inner radius of the pipeline.

Two pressure taking ports are formed in the negative pressure guide pipe and are located at 1/2 positions of the inner radius of the pipeline.

The flow straightener is a honeycomb structure consisting of square grids.

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

1) the flow straightening device is arranged in front of the flowmeter, so that the requirement of a front straight pipe section is further reduced.

2) The honeycomb structure of the flow straightener avoids vortex formation, can reduce permanent pressure loss of a pipeline, saves energy consumption, can control and stabilize fluid state, improves measurement repeatability and long-term stability, and widens measurement range ratio.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a flow straightener;

FIG. 3 is a schematic view of a positive impulse pipe and a positive impulse pipe installation.

In the figure: 1. the system comprises a pipeline, 2, a positive pressure guide pipe, 3, a positive pressure guide pipe, 4, a flow straightener, 5, a positive pressure side pressure guide pipe, 6, a negative pressure side pressure guide pipe, 7 and a differential pressure transmitter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a cross section flowmeter comprises a pipeline 1, a positive pressure guide pipe 2, a negative pressure guide pipe 3, a flow straightener 4, a positive pressure side pressure guide pipe 5, a negative pressure side pressure guide pipe 6 and a differential pressure transmitter 7, wherein the positive pressure guide pipe 2 and the negative pressure guide pipe 3 are vertically arranged, the positive pressure guide pipe 2 and the negative pressure guide pipe 3 are both vertical to the pipeline 1, the distance between the positive pressure guide pipe 2 and the negative pressure guide pipe 3 is 1/2 of the inner diameter of the pipeline 1, the flow straightener 4 is arranged in the pipeline 1, the distance between the flow straightener 4 and the positive pressure guide pipe 2 is 1/2 of the inner diameter of the pipeline 1, and the positive pressure guide pipe 2 is connected with the positive pressure side of the differential pressure transmitter 7 through the positive pressure side pressure guide pipe 5; the negative pressure guide pipe 3 is connected with the negative pressure side of a differential pressure transmitter 7 through a negative pressure side pressure guide pipe 6; the positive pressure guide pipe 2 and the negative pressure guide pipe 3 are hollow pipes; the positive pressure guide pipe 2 is provided with three pressure taking ports, wherein one pressure taking port is arranged at the positive center of the pipeline 1, and the other two pressure taking ports are arranged at the 1/2 position of the inner radius of the pipeline 1; two pressure taking ports are formed in the negative pressure guide pipe 3 and are positioned at 1/2 positions of the inner radius of the pipeline 1; the flow straightener 4 is a honeycomb structure consisting of square grids.

When the utility model is used, please refer to fig. 3, a positive pressure pipe 2 and a negative pressure pipe 3 of the utility model are installed on a pipeline 1, and the positive pressure pipe 2 is connected with the positive pressure side of a differential pressure transmitter 7 through a positive pressure side pressure pipe 5; the negative pressure guide pipe 3 is connected with the negative pressure side of a differential pressure transmitter 7 through a negative pressure side pressure guide pipe 6; the differential pressure value signal obtained by the differential pressure transmitter 7 is calculated by the transmitter or a calculator to calculate the specific flow value, thereby completing the flow measurement.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cross-sectional flow meter, characterized by: comprises a pipeline (1), a positive pressure pipe (2), a negative pressure pipe (3), a flowing straightener (4), a positive pressure side pressure pipe (5), a negative pressure side pressure pipe (6) and a differential pressure transmitter (7), the positive pressure guide pipe (2) and the negative pressure guide pipe (3) are arranged vertically to each other, the positive pressure guide pipe (2) and the negative pressure guide pipe (3) are both vertical to the pipeline (1), the distance between the positive pressure guide pipe (2) and the negative pressure guide pipe (3) is 1/2 of the inner diameter of the pipeline (1), a flowing straightener (4) is arranged in the pipeline (1), the distance between the flowing straightener (4) and the positive pressure guide pipe (2) is 1/2 of the inner diameter of the pipeline (1), the positive pressure guide pipe (2) is connected with the positive pressure side of a differential pressure transmitter (7) through a positive pressure side pressure guide pipe (5), the negative pressure guide pipe (3) is connected with the negative pressure side of the differential pressure transmitter (7) through a negative pressure side pressure guide pipe (6).

2. A cross-sectional flow meter according to claim 1, wherein: the positive pressure guide pipe (2) and the negative pressure guide pipe (3) are hollow pipes.

3. A cross-sectional flow meter according to claim 1, wherein: the positive pressure guide pipe (2) is provided with three pressure taking ports, one of which is arranged at the positive center of the pipeline (1), and the other two of which are arranged at the 1/2 position of the inner radius of the pipeline (1).

4. A cross-sectional flow meter according to claim 1, wherein: two pressure taking ports are formed in the negative pressure guide pipe (3) and are located at 1/2 positions of the inner radius of the pipeline (1).

5. A cross-sectional flow meter according to claim 1, wherein: the flow straightener (4) is a honeycomb structure consisting of square grids.