An ultrasonic gas flow meter flow stabilization and noise reduction device

Abstract

This utility model discloses a flow stabilization and noise reduction device for an ultrasonic gas flow meter, relating to the field of instrument manufacturing technology. It includes a housing and internal components disposed within the housing. The internal components include a first straight tube, one end of which is connected to a guide cone, and the other end of which is fixedly mounted on a mounting base. The internal components are provided with staggered strip-shaped holes, allowing airflow to pass through these holes and impact each other to form a more stable airflow, while some sound waves are attenuated during the impact process. The airflow is buffered by a primary vortex buffer zone and a secondary vortex buffer zone, reducing noise interference and effectively stabilizing the airflow field. The housing is bolted to a first flange, facilitating disassembly and cleaning, and ensuring good interchangeability.

Description

Technical Field

[0001] This utility model relates to the field of instrument manufacturing technology, and in particular to an ultrasonic gas flow meter flow stabilization and noise reduction device. Background Technology

[0002] Ultrasonic gas flow meters calculate flow velocity and flow rate by measuring the time difference, phase difference, or frequency difference of ultrasonic waves propagating in a gas. They offer advantages such as no mechanical wear, high accuracy, and wide measurement range, and are widely used in industrial gas metering and urban gas transmission and distribution. However, their core weakness lies in their susceptibility to noise interference. Specifically, noise reduces the signal-to-noise ratio (SNR) of the ultrasonic signal, causing errors in transit time measurement, decreased signal correlation, and even signal loss, ultimately leading to inaccurate flow calculations.

[0003] A search revealed that the authorized publication number CN207850450U discloses a noise reduction and rectification device for a gas ultrasonic flow meter, including a housing with a gas inlet and a gas outlet at both ends. A noise reduction and rectification module is located inside the housing and connected to the gas inlet and outlet. A gas chamber is provided between the noise reduction and rectification module and the housing. This device overcomes the defects in existing technologies where noise interference causes inaccurate measurement or malfunction of the gas ultrasonic flow meter. However, it employs multi-stage compensation elements, noise reduction elements, and a buffer chamber, resulting in a long airflow path. The noise reduction and rectification relies on multiple modules connected in series, leading to low efficiency and unsatisfactory flow stabilization and noise reduction effects. Furthermore, it does not mention modular design or a quick disassembly scheme, making disassembly complex and reducing interchangeability if internal components are blocked or damaged. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an ultrasonic gas flow meter stabilization and noise reduction device that addresses the above-mentioned shortcomings, overcoming the defects of unsatisfactory stabilization and noise reduction effect and low interchangeability of existing devices; and achieving the purpose of good stabilization and noise reduction effect and good interchangeability.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an ultrasonic gas flow meter flow stabilization and noise reduction device, including a housing and an internal component disposed in the housing, the internal component including a first straight tube, one end of the first straight tube being connected to a flow guide cone, and the other end of the first straight tube being fixedly provided with a fixing seat.

[0006] Furthermore, the first straight tube has several staggered strip holes evenly distributed on its wall.

[0007] Furthermore, one end of the housing is provided with an air inlet, and the other end of the housing is connected to a second straight pipe. One end of the second straight pipe extends into the housing, and the other end of the second straight pipe is provided with an air outlet.

[0008] Furthermore, the air inlet is provided with a first flange connected to an external pipe, and the air outlet is provided with a second flange connected to an external pipe.

[0009] Furthermore, the space between the housing and the inner components forms a buffer chamber.

[0010] Furthermore, the mounting base is bolted to the first flange.

[0011] Furthermore, the second straight pipe is provided with a swirling structure and a honeycomb tube bundle in sequence along the airflow direction.

[0012] Furthermore, the minimum inner diameter of the housing is equal to the inner diameter of the second straight tube.

[0013] This utility model adopts the above technical solution and has the following advantages compared with the prior art: the airflow enters the internal parts through the air inlet at one end of the shell. Most of the airflow is initially buffered through a vortex buffer zone, and then flows out through the staggered strip hole into the buffer chamber, forming staggered airflow cross mixing, which further enhances the airflow stability. The mixed airflow flows to the secondary vortex buffer zone for buffering again, further reducing turbulence noise and optimizing the flow field distribution. Finally, the airflow passes through the vortex structure and honeycomb tube bundle along the guide cone. The vortex structure eliminates residual vortex or forces the airflow to rotate to balance the flow velocity distribution, while the honeycomb tube bundle makes the airflow uniform and straight when it passes through, reducing turbulence and lateral flow interference, and at the same time absorbing some high-frequency noise, finally outputting a stable and low-noise airflow.

[0014] The internal components are equipped with staggered strip holes, which allow airflow to rush out through the staggered strip holes and impact each other to form a more stable airflow, and some sound waves are weakened during the impact process; the airflow is buffered by passing through a primary vortex buffer zone and a secondary vortex buffer zone, which reduces noise interference and effectively stabilizes the airflow field; the shell is bolted to the first flange, which is convenient for disassembly and cleaning and has good interchangeability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an ultrasonic gas flow meter flow stabilization and noise reduction device in an embodiment of this utility model; Figure 2 This is a schematic diagram of the flow guide cone in an embodiment of this utility model.

[0016] In the figure: 1-shell, 2-internal parts, 3-first flange, 4-misaligned strip hole, 5-primary vortex buffer zone, 6-guide cone, 7-buffer chamber, 8-secondary vortex buffer zone, 9-fixed seat, 10-second flange, 11-first straight pipe, 12-swirl structure, 13-honeycomb tube bundle, 14-second straight pipe. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Examples, such as Figure 1-2 As shown, an ultrasonic gas flow meter flow stabilization and noise reduction device includes a housing 1 and an internal component 2 disposed in the housing 1. One end of the housing 1 is provided with an air inlet, and the air inlet is provided with a first flange 3 connected to an external pipeline. The other end of the housing 1 is connected to a second straight pipe 14. One end of the second straight pipe 14 extends into the housing 1, and the other end of the second straight pipe 14 is provided with an air outlet, and the air outlet is provided with a second flange 10 connected to an external pipeline.

[0019] The space between the shell 1 and the inner part 2 forms a buffer chamber 7.

[0020] The inner component 2 includes a first straight pipe 11, one end of which is connected to a guide cone 6, and the other end of which is fixedly provided with a fixing seat 9. The fixing seat 9 is bolted to the first flange 3. The guide cone 6 has a hollow interior forming a primary vortex buffer zone 5, which is used to buffer the vortices generated by the gas flow and reduce airflow disturbance and noise. Several staggered strip holes 4 are evenly distributed on the wall of the first straight pipe 11, which can effectively rectify the incoming gas.

[0021] The second straight pipe 14 is provided with a swirling structure 12 and a honeycomb tube bundle 13 arranged sequentially along the airflow direction. The swirling structure 12 is used to eliminate residual swirling or force the airflow to rotate to equalize the flow velocity distribution. The honeycomb tube bundle 13 makes the airflow uniform and straight when it passes through, reduces turbulence and lateral flow interference, and can absorb some high-frequency noise. The honeycomb tube bundle 13 and the swirling structure 12 are existing technologies and will not be described in detail here.

[0022] The portion of the second straight pipe 14 that extends into the housing 1 forms a secondary vortex buffer zone 8 between itself and the housing 1.

[0023] Appendix Figure 1 The primary vortex buffer 5 and secondary vortex buffer 8 are for illustration only and do not represent the actual structure.

[0024] The minimum inner diameter of shell 1 is equal to the inner diameter of the second straight pipe 14.

[0025] Working principle: Airflow enters the internal component 2 through the air inlet at one end of the shell 1. Most of the airflow is initially buffered by the primary vortex buffer 5, and then flows out through the staggered strip hole 4 into the buffer chamber 7, forming staggered airflow cross-mixing, which further enhances the airflow stability. The mixed airflow flows to the secondary vortex buffer 8 for buffering again, further reducing turbulence noise and optimizing the flow field distribution. Finally, the airflow passes through the vortex structure 12 and the honeycomb tube bundle 13 along the guide cone 6. The vortex structure 12 eliminates residual vortex or forces the airflow to rotate to balance the flow velocity distribution, while the honeycomb tube bundle 13 makes the airflow uniform and straight when passing through, reducing turbulence and lateral flow interference, and can also absorb some high-frequency noise, ultimately outputting a stable and low-noise airflow.

[0026] The inner component 2 is provided with staggered strip holes 4, which allows the airflow to rush out through the staggered strip holes 4 and impact each other to form a more stable airflow, and some sound waves are weakened during the impact process; the airflow is buffered by passing through the primary vortex buffer 5 and the secondary vortex buffer 8, which reduces noise interference and effectively stabilizes the airflow field; the shell 1 is bolted to the first flange 3, which is convenient for disassembly and cleaning and has good interchangeability.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An ultrasonic gas flow meter steady flow noise reduction device, characterized by: It includes a housing (1) and an inner part (2) disposed in the housing (1). The inner part (2) includes a first straight tube (11), one end of which is connected to a guide cone (6), and the other end of the first straight tube (11) is fixedly provided with a fixing seat (9).

2. The ultrasonic gas flow meter flow straightener and noise reducer of claim 1, wherein: The first straight pipe (11) has several staggered strip holes (4) evenly distributed on its pipe wall.

3. The ultrasonic gas flow meter flow conditioner of claim 1, wherein: One end of the housing (1) is provided with an air inlet, and the other end of the housing (1) is connected to a second straight pipe (14). One end of the second straight pipe (14) extends into the housing (1), and the other end of the second straight pipe (14) is provided with an air outlet.

4. The ultrasonic gas flow meter flow conditioner of claim 3, wherein: The air inlet is provided with a first flange (3) connected to an external pipe, and the air outlet is provided with a second flange (10) connected to an external pipe.

5. The ultrasonic gas flow meter flow conditioner of claim 1, wherein: The space between the shell (1) and the inner part (2) forms a buffer chamber (7).

6. The ultrasonic gas flow meter flow conditioner of claim 4, wherein: The fixed seat (9) is bolted to the first flange (3).

7. The ultrasonic gas flow meter flow conditioner of claim 3, wherein: The second straight tube (14) is provided with a swirl structure (12) and a honeycomb tube bundle (13) in sequence along the airflow direction.

8. The ultrasonic gas flow meter flow conditioner of claim 3, wherein: The minimum inner diameter of the shell (1) is equal to the inner diameter of the second straight pipe (14).

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