CN111366210A

CN111366210A - Gas ultrasonic flowmeter without straight pipe section wide range

Info

Publication number: CN111366210A
Application number: CN202010264746.9A
Authority: CN
Inventors: 李福海; 李少锋; 周文辉; 郭晋阳
Original assignee: Zhengzhou Yinling Technology Co ltd
Current assignee: Zhengzhou Yinling Technology Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-07-03

Abstract

The invention provides a gas ultrasonic flowmeter without a straight pipe section with wide range, which comprises: the two sides of the lower cavity are respectively provided with an air inlet and an air outlet, a flow detection straight pipe section and a flow detection straight pipe section are arranged in the lower cavity, one end of the flow detection straight pipe is connected with the air outlet, the other end of the flow detection straight pipe is connected with the flow detection straight pipe section, the upper end of the flow detection straight pipe is positioned in the cavity of the upper cavity, an upper group of detection ports and a lower group of detection ports are respectively arranged on the flow detection straight pipe section, and an ultrasonic sensor is; a rectification silencing filter screen is also arranged in the lower cavity, and the bent pipe penetrates through the center of the rectification silencing filter screen. The beneficial effects are that: the high-speed airflow enters the cavity in the lower cavity, because the cavity is larger than the diameter of the air inlet, the air forms a buffer area in the lower cavity, the speed and the noise are reduced, the air enters the upper cavity through the rectification noise reduction filter screen, and the air flows into the elbow pipe from the flow detection straight pipe section in the upper cavity and flows out from the air outlet. The gas reduces turbulence and noise through the flowing process, reduces the influence on the flow detection precision, improves the metering precision and increases the range ratio.

Description

Gas ultrasonic flowmeter without straight pipe section wide range

Technical Field

The invention relates to a gas ultrasonic flowmeter, in particular to a gas ultrasonic flowmeter which does not need a straight pipe section with a wide range.

Background

At present, with the construction and popularization of gas transmission pipelines, gas meters adopting new concept technology emerge continuously like bamboo shoots in spring after rain. Ultrasonic flowmeter belongs to pure electronic structure, compares with the flowmeter of machinery in the past, and its advantage is: 1. the mechanical transmission part is not needed, so that the operation is free from mechanical noise and is not influenced by mechanical abrasion and failure; 2. the magnetic sensing element is not arranged, and the metering is not easily influenced by a magnetic field; 3. the ultrasonic flowmeter has high precision, long service life, easy maintenance, wide measurement range, high intelligent degree and the like; therefore, the ultrasonic flowmeter is a development trend of gas metering in the future, but the stability and the metering accuracy of the ultrasonic flowmeter are affected due to gas turbulence, noise and the like in a gas transmission pipeline of the current ultrasonic flowmeter, the stability of small flow is poor, and a straight pipe section and a rectifier are required to be installed to improve the metering accuracy.

Disclosure of Invention

The invention provides a novel flowmeter for solving the problems in the prior art and overcoming the influence of gas turbulence and noise in the existing gas transmission pipeline on the flow measurement of the pipeline, and the novel flowmeter can effectively reduce the gas turbulence and the noise in the pipeline, thereby improving the measurement precision and wide range of the natural gas flowmeter.

The technical scheme of the invention is realized as follows:

a gas ultrasonic flow meter which does not require a wide range of straight tube sections, comprising: the flow detection device comprises a cavity with a cavity, wherein the cavity consists of an upper cavity and a lower cavity, the upper cavity and the lower cavity are fixedly connected through bolts, an air inlet and an air outlet are respectively arranged on two sides of the lower cavity, a flow detection straight pipe and a bent pipe are arranged in the lower cavity, the lower end of the flow detection straight pipe is in threaded connection with the bent pipe, one end of the bent pipe is connected with the air outlet, the other end of the bent pipe is connected with the flow detection straight pipe, the upper end of the flow detection straight pipe is positioned in the cavity of the upper cavity, an upper group of detection ports and a lower group of detection ports are respectively arranged on the flow detection straight pipe, and an; still be equipped with the amortization filter screen in the lower cavity body, the return bend passes the center of amortization filter screen.

Further, four corners of the lower cavity are respectively provided with a bolt connecting seat, four corners of the upper cavity are also provided with through holes, and the bolt connecting seats are in one-to-one correspondence with the through holes and are fixed through bolts; the lower end of the upper cavity is also provided with a threaded connection part, and the upper end of the lower cavity is provided with an internal thread matched with the threaded connection part.

Furthermore, the inner wall of the lower cavity is also provided with four bosses, mounting holes are formed in the bosses, and the noise reduction filter screen is fixed on the bosses; the bottom of cavity still is equipped with two stands down the screw hole is seted up to the stand upper end, be equipped with on the return bend with a pair of fixed ear that the stand corresponds, fixed ear passes through the bolt fastening on the stand.

Furthermore, two symmetrical connecting seats are further arranged on the flow detection straight pipe, each connecting seat is connected with 2 connecting rods, and the lower ends of the connecting rods are pressed on the silencing filter screen and are fixed with the bosses through the mounting holes.

Furthermore, the outer part of the upper cavity is also provided with a face mask and a display box, a circuit board and a battery are arranged in the display box, and a display is arranged on the face mask.

The invention has the beneficial effects that:

1. high-speed airflow enters the cavity in the cavity, and the diameter of the cavity is larger than that of the air inlet, so that the air enters the cavity to be buffered and denoised; then, the gas is changed into stable fluid suitable for metering through the rectification silencing filter screen, so that the metering precision is improved, the stability of small flow is improved, and the detection range of small flow is widened;

2. the device has compact structure and wide application range, and can directly replace the prior wheel waist and Roots flowmeter under the condition of not changing the prior pipeline equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

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

FIG. 3 is a schematic structural view of a straight pipe and a bent pipe;

FIG. 4 is a schematic structural view of the lower chamber;

fig. 5 is a schematic structural view of the upper chamber.

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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 5, an ultrasonic gas flowmeter which does not require a wide range of straight pipe sections includes: the cavity body 1 with a cavity is formed by an upper cavity body 2 and a lower cavity body 3, four corners of the lower cavity body 3 are respectively provided with a bolt connecting seat 4, four corners of the upper cavity body 2 are also provided with through holes 5, and the bolt connecting seats 4 correspond to the through holes 5 one by one and are fixed through bolts; still be equipped with threaded connection portion 6 at the lower extreme of last cavity 2, be equipped with the internal thread that matches with threaded connection portion 6 in the upper end of cavity 3 down, threaded connection portion 6 is the external screw thread, and the internal thread cooperation of screwing on with lower cavity 3.

An air inlet 7 and an air outlet 8 are respectively arranged on two sides of the lower cavity 3, a flow detection straight pipe 9 and a bent pipe 10 are installed in the lower cavity 3, the flow detection straight pipe 9 is connected with the bent pipe 10 through threads, one end of the bent pipe 10 is connected with the air outlet 8, the other end of the bent pipe is connected with the flow detection straight pipe 9, the upper end of the flow detection straight pipe 9 is located in a cavity of the upper cavity 2, an upper group of detection ports 11 and a lower group of detection ports 11 are respectively arranged on the flow detection straight pipe 9, and an ultrasonic sensor 12 is installed at; a silencing filter screen 13 is also arranged in the lower cavity 3, and the bent pipe 10 passes through the center of the silencing filter screen 13.

Four bosses 14 are further arranged on the inner wall of the lower cavity 3, and mounting holes 15 are formed in the bosses 14.

Two symmetrical connecting seats 16 are further arranged on the flow detection straight pipe 9, each connecting seat 16 is connected with 2 connecting rods 17, and the lower ends of the connecting rods 17 are pressed on the silencing filter screen 13 and are fixed with the bosses 14 through mounting holes 15.

The outer part of the upper cavity 2 is also provided with a face mask 18 and a display box 19, a circuit board and a battery are arranged in the display box 19, and a display 20 is arranged on the face mask 18.

The bottom of the lower cavity 3 is further provided with two upright posts 21, the upper ends of the upright posts 21 are provided with threaded holes, the elbow 10 is provided with a pair of fixing lugs 22 corresponding to the upright posts 21, and the fixing lugs 22 are fixed on the upright posts 21 through bolts.

When the device is used, air is fed from the air inlet 7, enters the cavity in the cavity 1, enters the flow detection straight pipe 9 from the upper end of the flow detection straight pipe 9, passes through the bent pipe 10 and is discharged from the air outlet 8; in the process, high-speed airflow enters the cavity in the cavity 1, and the diameter of the cavity is larger than that of the air inlet 7, so that the air enters the cavity 1 to be buffered and denoised; then, the gas is changed into stable fluid suitable for metering through the silencing filter screen 13, so that the metering precision is improved, the stability of small flow is improved, and the detection range of small flow is widened.

The ultrasonic sensor 12 sends a signal to a circuit board inside the display box 19, which converts the signal and displays it on the display 20.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas ultrasonic flow meter which does not require a wide range of straight tube sections, comprising: the cavity with cavity, the cavity comprises last cavity and lower cavity, goes up the cavity and passes through bolted connection fixed, its characterized in that with lower cavity: the flow detection device comprises a lower cavity, a flow detection straight pipe and a flow detection straight pipe, wherein the two sides of the lower cavity are respectively provided with an air inlet and an air outlet; still be equipped with the amortization filter screen in the lower cavity body, the return bend passes the center of amortization filter screen.

2. The ultrasonic gas flow meter of claim 1 which does not require a wide range of straight pipe sections, wherein: the four corners of the lower cavity are respectively provided with a bolt connecting seat, the four corners of the upper cavity are also provided with through holes, and the bolt connecting seats are in one-to-one correspondence with the through holes and are fixed through bolts; the lower end of the upper cavity is also provided with a threaded connection part, and the upper end of the lower cavity is provided with an internal thread matched with the threaded connection part.

3. The ultrasonic gas flow meter of claim 1 which does not require a wide range of straight pipe sections, wherein: the flow detection straight pipe is also provided with two symmetrical connecting seats, each connecting seat is connected with 2 connecting rods, and the lower ends of the connecting rods are pressed on the silencing filter screen and are fixed with the bosses through the mounting holes.

4. The ultrasonic gas flow meter of claim 1 which does not require a wide range of straight pipe sections, wherein: the outer part of the upper cavity is also provided with a mask and a display box, a circuit board and a battery are arranged in the display box, and a display is arranged on the mask.