Noise reduction device of ultrasonic gas flowmeter
By using components such as variable diameter tubes, sheaths, buffer gas chambers and sound-absorbing cotton in ultrasonic gas flowmeters, the problems of noise interference and inconvenience are solved, and higher measurement accuracy and flexibility are achieved.
Patent Information
- Application Number
- CN202411481439.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2024-12-24
AI Technical Summary
The ultrasonic gas flowmeter is disturbed by a variety of noise during operation, which affects the measurement accuracy and stability. The existing devices are inconvenient to carry, limiting the flexibility and accuracy of measurement.
An ultrasonic gas flowmeter noise reduction device including a diameter-reducing tube, sheath, noise reduction component and a buffer gas chamber is designed to adjust the sound wave phase difference through the diameter-reducing tube, the sheath is portable, the buffer gas chamber absorbs noise, and the buffer gas chamber is buffered. Sound-absorbing cotton and filters are installed inside the board to reduce noise interference.
Effectively reduce noise interference, improve the measurement accuracy and flexibility of the flowmeter, and enable rapid flow measurement in different environments.
Smart Images
Figure CN119178481A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of noise reduction devices, and in particular to a noise reduction device for an ultrasonic gas flow meter. Background Art
[0002] During operation, ultrasonic gas flowmeters are subject to interference from a variety of noises, which may come from mechanical vibrations in the pipeline, fluid dynamics effects, roughness of the inner wall of the upstream straight pipe section of the flowmeter, gas composition, and upstream fluid flow patterns. These noises will interfere with the transmission of ultrasonic signals, leading to measurement errors, thus affecting the measurement accuracy and stability of the flowmeter. Therefore, in order to improve the measurement accuracy and stability of ultrasonic gas flowmeters, effective noise reduction measures need to be taken.
[0003] According to the Chinese patent announcement number CN 109708710 U, an ultrasonic gas flow meter noise reduction and rectification device includes a shell and a rectification unit. The shell is mainly composed of three parts: a noise reduction unit, a buffer cylinder and a rectification unit. Such an integrated structural design overcomes the difficulties of the separate structure occupying a large space and complex installation, and can effectively shorten the length of the straight pipe and the impact of noise. The noise reduction unit mainly includes a front baffle, a retaining ring and a rear baffle. The front baffle is a hemispherical structure, which makes it easier for turbulent gas fluid to pass through and will not form a second flow field disturbance. The front and rear baffles are connected in series, and the retaining ring is set between the two baffles to play an isolation role. A reasonable buffer space is reserved between the baffle and the retaining ring for the gas fluid to pass through, thereby achieving the effect of absorbing, isolating and eliminating noise. The rectifier unit includes a primary rectifier tube bundle and a secondary rectifier tube bundle. Both of the two rectifier tube bundles have circular hole structures, but the size and arrangement of the circular hole structures are different. There is a buffer space between the primary rectifier tube bundle and the secondary rectifier tube bundle. The circular hole structure of the rectifier tube bundle is easy to process and is conducive to the passage of gas fluid, and the reserved buffer space can compensate for the fluid. After two rectifications, the gas flow rate is stable, which increases the measurement accuracy.
[0004] However, the above-mentioned devices are not portable and will limit the flexibility of users during the measurement process, thereby affecting the accuracy and efficiency of the measurement. Summary of the invention
[0005] The object of the present invention is to provide a noise reduction device for an ultrasonic gas flow meter to solve the problems raised in the above background technology.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an ultrasonic gas flow meter noise reduction device, comprising an ultrasonic flow meter body, the surface of the ultrasonic flow meter body is movably connected to an outer cylinder, and the top of the outer cylinder is fixedly connected to a fixing seat; A support column is fixedly connected to the top of the fixing seat, a display structure is fixedly connected to the top of the support column, a reducer is fixedly connected to the right side of the ultrasonic flowmeter body, a first flange is movably connected to the right side of the reducer, a sheath is fixedly connected to the front of the outer cylinder, a noise reduction assembly is fixedly connected to the left side of the ultrasonic flowmeter body, a gas rectifier is fixedly connected to the inner left side of the noise reduction assembly, a buffer air chamber is fixedly connected to the inner right side of the noise reduction assembly, and a base is fixedly connected to the inner bottom of the buffer air chamber.
[0007] Preferably, a fixing block is fixedly connected to the left side of the top of the base, and a plurality of the fixing blocks are provided.
[0008] Preferably, one end of the fixing block is fixedly connected with a spring, and a plurality of the springs are provided.
[0009] Preferably, one end of the spring is fixedly connected to a buffer plate, and a through hole is formed on the surface of the buffer plate.
[0010] Preferably, a plurality of through holes are provided, and sound-absorbing cotton is fixedly connected inside the through holes.
[0011] Preferably, a second flange is movably connected to the left side of the noise reduction component, and the first flange has the same caliber as the second flange.
[0012] Preferably, flange holes are provided on the surfaces of the second flange and the first flange, and a filter screen is provided in the middle of the surface of the second flange.
[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the present invention has a reducer fixedly connected to the right side of the ultrasonic flowmeter body. The reducer can adjust the cross-sectional area and length of the pipeline to cause the sound waves to reflect, interfere and diffract in the pipeline, forming a phase difference, thereby reducing the amplitude and energy of the sound waves. In the ultrasonic gas flowmeter, noise may be generated due to the flow of gas, and these noises will interfere with the measurement accuracy of the flowmeter. As a part of the noise reduction device, the reducer can effectively reduce these noises and improve the measurement accuracy of the flowmeter. Then, a sheath is fixedly connected to the front of the outer cylinder. The ultrasonic gas flowmeter noise reduction device that is easy to carry with the sheath can be easily moved to different work locations. Whether it is an indoor laboratory or an outdoor industrial site, flow measurement can be quickly performed. Then, a buffer air chamber is fixedly connected to the right side of the interior of the noise reduction component. The buffer air chamber can absorb and disperse these noises through its special structure and volume, reduce its interference with the ultrasonic flowmeter, and thus improve the measurement accuracy.
[0014] Second, the present invention has a through hole on the surface of the buffer plate, and a sound-absorbing cotton is fixedly connected inside the through hole, and the sound-absorbing cotton can reduce the propagation of noise. In an ultrasonic gas flowmeter, the gas flow will generate a certain amount of noise, and this noise will interfere with the propagation and reception of ultrasonic waves, thereby affecting the measurement accuracy of the flowmeter. By arranging sound-absorbing cotton inside the buffer plate, these noises can be effectively absorbed, reducing the impact of noise on the flowmeter measurement and improving the measurement accuracy. Then, a second flange is movably connected to the left side of the noise reduction component, and a filter is arranged in the middle of the surface of the second flange. Through the filtering effect of the filter, it can be ensured that the gas is purer when flowing through the ultrasonic gas flowmeter, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-section of the structure of the present invention; Figure 3 This is a schematic diagram of the structural buffer air chamber of the present invention; Figure 4 It is a schematic side view of the structure of the present invention; Figure 5 It is a schematic diagram of the second flange of the structure of the present invention.
[0016] Among them: 1. Ultrasonic flowmeter body; 2. Outer cylinder; 3. Fixed seat; 4. Support column; 5. Display structure; 6. Reducer; 7. First flange; 8. Sheath; 9. Noise reduction component; 10. Gas rectifier; 11. Buffer air chamber; 12. Base; 13. Fixed block; 14. Spring; 15. Buffer plate; 16. Through hole; 17. Sound-absorbing cotton; 18. Second flange; 19. Flange hole; 20. Filter. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] The present invention provides the following technical solutions: Method 1
[0019] See also Figure 1 , Figure 2 , Figure 3 , Figure 4, an ultrasonic gas flowmeter noise reduction device, comprising an ultrasonic flowmeter body 1, an outer cylinder 2 is movably connected to the surface of the ultrasonic flowmeter body 1, and a fixing seat 3 is fixedly connected to the top of the outer cylinder 2; A support column 4 is fixedly connected to the top of the fixing seat 3, a display structure 5 is fixedly connected to the top of the support column 4, a reducer 6 is fixedly connected to the right side of the ultrasonic flowmeter body 1, a first flange 7 is movably connected to the right side of the reducer 6, a sheath 8 is fixedly connected to the front of the outer tube 2, a noise reduction component 9 is fixedly connected to the left side of the ultrasonic flowmeter body 1, a gas rectifier 10 is fixedly connected to the inner left side of the noise reduction component 9, a buffer air chamber 11 is fixedly connected to the inner right side of the noise reduction component 9, and a base 12 is fixedly connected to the inner bottom of the buffer air chamber 11.
[0020] Through the above technical solution, a reducer 6 is fixedly connected to the right side of the ultrasonic flowmeter body 1. The reducer 6 can adjust the cross-sectional area and length of the pipeline to make the sound waves reflect, interfere and diffract in the pipeline, forming a phase difference, thereby reducing the amplitude and energy of the sound waves. In the ultrasonic gas flowmeter, noise may be generated due to the flow of gas, and these noises will interfere with the measurement accuracy of the flowmeter. As a part of the noise reduction device, the reducer 6 can effectively reduce these noises and improve the measurement accuracy of the flowmeter. Then the front of the outer cylinder 2 is fixedly connected with a sheath 8. The ultrasonic gas flowmeter noise reduction device that is easy to carry with the sheath 8 can be easily moved to different work locations. Whether it is an indoor laboratory or an outdoor industrial site, flow measurement can be quickly performed. Then the internal right side of the noise reduction component 9 is fixedly connected with a buffer air chamber 11. The buffer air chamber 11 can absorb and disperse these noises through its special structure and volume, reduce its interference with the ultrasonic flowmeter, and thus improve the measurement accuracy.
[0021] Method 2
[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , and on the basis of the first embodiment, it is further obtained that: a fixing block 13 is fixedly connected to the left side of the top of the base 12, and a plurality of the fixing blocks 13 are provided.
[0023] One end of the fixing block 13 is fixedly connected with a spring 14 , and a plurality of springs 14 are provided.
[0024] One end of the spring 14 is fixedly connected to a buffer plate 15 , and a through hole 16 is formed on the surface of the buffer plate 15 .
[0025] There are a plurality of through holes 16 , and a sound-absorbing cotton 17 is fixedly connected inside the through holes 16 .
[0026] A second flange 18 is movably connected to the left side of the noise reduction component 9 , and the first flange 7 and the second flange 18 have the same caliber.
[0027] Flange holes 19 are formed on the surfaces of the second flange 18 and the first flange 7 , and a filter screen 20 is disposed in the middle of the surface of the second flange 18 .
[0028] Through the above technical solution, a through hole 16 is opened on the surface of the buffer plate 15, and a sound-absorbing cotton 17 is fixedly connected inside the through hole 16, and the sound-absorbing cotton 17 can reduce the propagation of noise. In the ultrasonic gas flowmeter, the gas flow will generate certain noise, and this noise will interfere with the propagation and reception of ultrasonic waves, thereby affecting the measurement accuracy of the flowmeter. By arranging the sound-absorbing cotton 17 inside the buffer plate 15, these noises can be effectively absorbed, reducing the impact of noise on the flowmeter measurement, and improving the measurement accuracy. Then, the left side of the noise reduction component 9 is movably connected with a second flange 18, and a filter screen 20 is arranged in the middle of the surface of the second flange 18. Through the filtering effect of the filter screen 20, it can be ensured that the gas is purer when flowing through the ultrasonic gas flowmeter, thereby improving the measurement accuracy.
[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An ultrasonic gas flow meter noise reduction device, comprising an ultrasonic flow meter body (1), characterized in that: The surface of the ultrasonic flow meter body (1) is movably connected to an outer cylinder (2), and the top of the outer cylinder (2) is fixedly connected to a fixing seat (3); The top of the fixing seat (3) is fixedly connected to a support column (4), the top of the support column (4) is fixedly connected to a display structure (5), the right side of the ultrasonic flow meter body (1) is fixedly connected to a reducer (6), the right side of the reducer (6) is movably connected to a first flange (7), the front side of the outer cylinder (2) is fixedly connected to a sheath (8), the left side of the ultrasonic flow meter body (1) is fixedly connected to a noise reduction component (9), the left side of the interior of the noise reduction component (9) is fixedly connected to a gas rectifier (10), the right side of the interior of the noise reduction component (9) is fixedly connected to a buffer gas chamber (11), and the bottom of the interior of the buffer gas chamber (11) is fixedly connected to a base (12).
2. The ultrasonic gas flow meter noise reduction device according to claim 1, characterized in that: A fixing block (13) is fixedly connected to the left side of the top of the base (12), and a plurality of the fixing blocks (13) are provided.
3. The ultrasonic gas flow meter noise reduction device according to claim 2, characterized in that: One end of the fixed block (13) is fixedly connected to a spring (14), and a plurality of springs (14) are provided.
4. The ultrasonic gas flow meter noise reduction device according to claim 3, characterized in that: One end of the spring (14) is fixedly connected to a buffer plate (15), and a through hole (16) is provided on the surface of the buffer plate (15).
5. The ultrasonic gas flow meter noise reduction device according to claim 4, characterized in that: A plurality of through holes (16) are provided, and a sound-absorbing cotton (17) is fixedly connected inside the through holes (16).
6. The ultrasonic gas flow meter noise reduction device according to claim 1, characterized in that: A second flange (18) is movably connected to the left side of the noise reduction component (9), and the first flange (7) and the second flange (18) have the same caliber.
7. The ultrasonic gas flow meter noise reduction device according to claim 6, characterized in that: Flange holes (19) are provided on the surfaces of the second flange (18) and the first flange (7), and a filter screen (20) is provided in the middle of the surface of the second flange (18).