CN113899416A

CN113899416A - Low-pressure-loss ultrasonic noise reduction device

Info

Publication number: CN113899416A
Application number: CN202111250994.9A
Authority: CN
Inventors: 赵建新; 卢小林; 张运金; 滕旭东
Original assignee: Shanghai Acol Gas Testing And Controlling Equipment Co ltd
Current assignee: Shanghai Acol Gas Testing And Controlling Equipment Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-01-07

Abstract

The invention relates to the technical field of ultrasonic flow meters and discloses an ultrasonic noise reduction device with low pressure loss. This ultrasonic noise reduction device of low pressure loss, with the inside subassembly of making an uproar that falls of device, increase the reflection section of thick bamboo that the structure is "pi" shape in the inside of inner tube, the sound wave is after the terminal surface of contact reflection section of thick bamboo, the reflection, scatter the original route, the sound wave attenuates gradually with this, the size design of straight tube section before original is the same size with the inside reflection section of thick bamboo of the subassembly of making an uproar that falls, make the sectional area of the pipeline that is located device both ends import and export position the same or similar with the area of reflection section of thick bamboo, make the in-process of making an uproar that falls like this, guarantee fluidic pressure unanimous as far as possible, even can not cause the too big condition of pressure loss under the condition of pipeline structure change like this, the life of equipment has been prolonged.

Description

Low-pressure-loss ultrasonic noise reduction device

Technical Field

The invention relates to the technical field of ultrasonic flow meters, in particular to an ultrasonic noise reduction device with low pressure loss.

Background

The ultrasonic flowmeter is developed based on the principle that the propagation speed of ultrasonic waves in a flowing medium is equal to the vector sum of the average flow speed of a measured medium and the speed of sound waves in a static medium, mainly comprises a transducer and a converter, and has different types such as a Doppler method, a speed difference method, a beam offset method, a noise method and a correlation method.

The existing ultrasonic flowmeter generally adopts a front straight pipe section design, the front straight pipe section mainly plays a role in stabilizing flow, but cannot play a role in reducing noise waves generated by fluid in a pipeline, and the noise waves have great influence on fluid flow velocity information acquired by an ultrasonic transducer inside the ultrasonic flowmeter, so that the information acquired by the ultrasonic transducer is inaccurate, and finally the metering precision of the flowmeter is not high.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an ultrasonic noise reduction device with low pressure loss, which is used for solving the problems that the prior ultrasonic flowmeter in the background art generally adopts a front straight pipe section design, the front straight pipe section mainly plays a role in stabilizing the flow, but cannot play a role in reducing noise waves generated by fluid in a pipeline, and the noise waves have great influence on fluid flow velocity information acquired by an ultrasonic transducer in the ultrasonic flowmeter, so that the information acquired by the ultrasonic transducer is inaccurate, and the metering precision of the flowmeter is not high finally.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: device of making an uproar falls in supersound of low pressure loss, including first connecting pipe, both ends are provided with the closing cap respectively about first connecting pipe, the mounting groove has been seted up to the inside of closing cap, the inside of mounting groove is provided with the second connecting pipe, the outside of second connecting pipe is provided with flange, the inside of first connecting pipe is provided with the subassembly of making an uproar falls.

Preferably, the noise reduction assembly comprises an inner tube, an inner tube connecting pin and a reflection barrel, the outer side of the inner tube is fixedly connected with the inner tube connecting pin, and the inner part of the inner tube connecting pin is fixedly connected with the reflection barrel, so that noise reduction treatment on the inner part of the pipeline is realized.

Preferably, the inner pipe connecting pins are welded to the inner wall of the first connecting pipe or are formed by casting, three groups of the inner pipe connecting pins are distributed in an equidistant annular mode, two inner pipe connecting pins are arranged in each group, the end face, close to one side of the center of the inner pipe, of the reflection barrel is designed to be of an arc-shaped structure, the cross section of the reflection barrel is of a pi-shaped structure, noise sound waves are reflected twice in the reflection barrel of the pi-shaped structure, and the noise waves are gradually reduced.

Preferably, the area of the cross section of the second connecting pipe is the same as that of the cross section of the reflecting cylinder, so that the pressure of fluid inside the pipeline is consistent in the noise reduction process of the equipment, the pressure loss is reduced, and the service life is prolonged.

Preferably, the two sealing covers and the two connecting flanges are symmetrically arranged about a vertical central line of the first connecting pipe respectively, each sealing cover is in welding connection or cast molding with the first connecting pipe, each connecting flange is in welding connection or cast molding with the sealing cover, a pipeline of an original structure is transformed, and the structural strength of the connecting position of each part is ensured.

Preferably, the diameter of the mounting groove is the same as the outer diameter of the second connecting pipe, the second connecting pipe passes through the mounting groove and extends to the outer side of the sealing cover, and the second connecting pipe and the sealing cover are welded or cast, so that the connection strength of the structure is improved.

Compared with the prior art, the invention provides the ultrasonic noise reduction device with low pressure loss, which has the following beneficial effects:

1. the ultrasonic noise reduction device with low pressure loss is characterized in that a noise reduction assembly is added in the device, a reflection barrel with a pi-shaped structure is added in an inner tube, one side of the reflection barrel is of an arc structure, when noise sound waves are transmitted from a straight pipeline along a pipeline path, the sound waves are reflected and scattered back to an original path after contacting the end face of the reflection barrel, and are gradually attenuated to achieve the purpose of reducing the noise sound waves, the sound waves can be reflected twice in the structure in the reflection barrel, so that the noise waves are reduced step by step, the interference on an ultrasonic flowmeter is reduced, and the measurement accuracy is improved;

2. this ultrasonic noise reduction device of low pressure loss, the size design of straight tube section before with original becomes the size the same with the inside reflection section of thick bamboo that falls the subassembly of making an uproar, can use in less space, realize making an uproar, make the sectional area that is located the pipeline of device both ends exit position the same or similar with the area of reflection section of thick bamboo, make like this and fall the in-process of making an uproar, guarantee fluidic pressure unanimity as far as possible, even can not cause the too big condition of pressure loss under the condition of pipeline structure change like this, the life of equipment has been prolonged.

Drawings

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

FIG. 2 is a schematic perspective sectional view of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is an exploded view of the present invention;

FIG. 5 is a schematic perspective view of a noise reduction assembly of the present invention;

FIG. 6 is a schematic view of the noise reduction principle of the rectifying device of the present invention

FIG. 7 is a schematic view of the principle of noise reduction refraction according to the present invention.

Wherein: 1. a first connecting pipe; 2. sealing the cover; 3. mounting grooves; 4. a second connecting pipe; 5. a connecting flange; 6. a noise reduction assembly; 61. an inner tube; 62. the inner pipe is connected with the foot; 63. a reflective cylinder.

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. 1-7, the present invention provides the following technical solutions: the ultrasonic noise reduction device with low pressure loss comprises a first connecting pipe 1, wherein sealing covers 2 are respectively arranged at the left end and the right end of the first connecting pipe 1, a mounting groove 3 is formed in each sealing cover 2, a second connecting pipe 4 is arranged in each mounting groove 3, and a connecting flange 5 is arranged on the outer side of each second connecting pipe 4;

the two sealing covers 2 and the two connecting flanges 5 are symmetrically arranged about a vertical central line of the first connecting pipe 1 respectively, each sealing cover 2 is in welding connection or cast molding with the first connecting pipe 1, each connecting flange 5 is in welding connection or cast molding with the sealing cover 2, a pipeline of an original structure is transformed, the structural strength of the connection position of each part is ensured, the diameter of the mounting groove 3 is the same as the outer diameter of the second connecting pipe 4, the second connecting pipe 4 penetrates through the mounting groove 3 and extends to the outer side of the sealing cover 2, and the second connecting pipe 4 is in welding connection or cast molding with the sealing covers 2, so that the connection strength of the structure is improved;

the noise reduction assembly 6 is arranged in the first connecting pipe 1, the noise reduction assembly 6 comprises an inner pipe 61, an inner pipe connecting pin 62 and a reflecting cylinder 63, the outer side of the inner pipe 61 is fixedly connected with the inner pipe connecting pin 62, the inner part of the inner pipe connecting pin 62 is fixedly connected with the reflecting cylinder 63, noise reduction treatment on the inner part of the pipeline is realized, the inner pipe connecting pin 62 is welded with the inner wall of the first connecting pipe 1 or cast, three groups of inner pipe connecting pins 62 are distributed in an equidistant annular mode, two inner pipe connecting pins 62 are arranged in each group, the end face, close to the center side of the inner pipe 61, of the reflecting cylinder 63 is designed in an arc structure, the cross section of the reflecting cylinder 63 is in a pi-shaped structure, noise sound waves are reflected twice in the reflecting cylinder 63 in the pi-shaped structure, noise waves are gradually reduced, the area of the cross section of the second connecting pipe 4 is the same as that of the cross section of the reflecting cylinder 63, and the noise reduction process of the equipment is ensured, the fluid pressure in the pipeline is consistent, the pressure loss is reduced, and the service life is prolonged.

The working principle is as follows: when the device is used, fluid enters the device, the fluid generates noise during transportation, the noise sound wave is transmitted along the pipeline, when the noise sound wave is transmitted along the pipeline path from the straight pipeline, the sound wave is reflected and scattered back to the original path after contacting the end surface of the reflecting cylinder 63, the sound wave is gradually attenuated, the purpose of reducing the noise sound wave is achieved, the sound wave is reflected twice in the structure in the reflecting cylinder 63, the noise wave is reduced step by step, the interference on the ultrasonic flowmeter is reduced, the measurement accuracy is improved, meanwhile, the size of the original front straight pipeline section is designed to be the same as that of the reflecting cylinder 63 in the noise reduction assembly 6, the sectional area of the pipeline at the inlet and outlet positions at the two ends of the device is the same as or similar to that of the reflecting cylinder 63, and therefore, the pressure of the fluid is ensured to be consistent as much as possible in the noise reduction process, therefore, the pressure loss is not excessively large even under the condition that the pipeline structure is changed, and the service life of the equipment is prolonged.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Device of making an uproar falls in supersound of low pressure loss, including first connecting pipe (1), its characterized in that: the noise reduction device is characterized in that sealing covers (2) are respectively arranged at the left end and the right end of the first connecting pipe (1), a mounting groove (3) is formed in the sealing cover (2), a second connecting pipe (4) is arranged in the mounting groove (3), a connecting flange (5) is arranged on the outer side of the second connecting pipe (4), and a noise reduction assembly (6) is arranged in the first connecting pipe (1).

2. The low voltage loss ultrasonic noise reduction device of claim 1, wherein: the noise reduction assembly (6) comprises an inner tube (61), an inner tube connecting pin (62) and a reflection barrel (63), the outer side of the inner tube (61) is fixedly connected with the inner tube connecting pin (62), and the inner part of the inner tube connecting pin (62) is fixedly connected with the reflection barrel (63).

3. The low pressure drop ultrasonic noise reduction device of claim 2, wherein: the inner tube connecting pins (62) are welded or cast with the inner wall of the first connecting tube (1), three groups of inner tube connecting pins (62) are distributed in an equidistant annular mode, each group of inner tube connecting pins (62) is provided with two, the end face, close to one side of the center of the inner tube (61), of the reflecting tube (63) is designed to be of an arc structure, and the cross section of the reflecting tube (63) is of a pi-shaped structure.

4. The low pressure drop ultrasonic noise reduction device of claim 2, wherein: the area of the cross section of the second connecting pipe (4) is the same as that of the cross section of the reflecting cylinder (63).

5. The low voltage loss ultrasonic noise reduction device of claim 1, wherein: the sealing cover (2) and the connecting flange (5) are symmetrically arranged about a vertical central line of the first connecting pipe (1), the sealing cover (2) and the first connecting pipe (1) are connected in a welding mode or are formed in a casting mode, and the connecting flange (5) and the sealing cover (2) are connected in a welding mode or are formed in a casting mode.

6. The low voltage loss ultrasonic noise reduction device of claim 1, wherein: the diameter of mounting groove (3) is the same with the external diameter of second connecting pipe (4), second connecting pipe (4) pass mounting groove (3) and extend to the outside of closing cap (2), welded connection or cast molding between second connecting pipe (4) and closing cap (2).