Noise reduction device of gas ultrasonic flowmeter

Abstract

The utility model relates to the field of noise reduction of gas ultrasonic flow meters, and discloses a noise reduction device of a gas ultrasonic flow meter, which comprises a noise reduction pipe, a noise reduction component is arranged on the inner wall of the noise reduction pipe, a clamping component is arranged on the right side of the noise reduction pipe, the noise reduction component comprises a noise reduction plate, and the inner wall of the noise reduction pipe is fixedly connected with sound insulation cotton. The inner wall of the noise reduction pipe is fixedly connected with an acoustic wave absorbing plate, the inner wall of the sound insulation cotton is fixedly connected with a spiral silencing piece, silencing holes are formed in the outer wall of the silencing plate, the clamping assembly comprises a circular ring, and the inner wall of the front face of the circular ring is elastically connected with a wedge block through a spring. According to the ultrasonic flowmeter, the noise reduction assembly is arranged, and the noise reduction plate, the acoustic foam, the sound insulation cotton, the acoustic wave absorption plate and the spiral noise reduction piece are arranged, so that sound wave energy can be effectively absorbed, eddy currents and turbulent currents generated during noise transmission and gas flowing are reduced, and the noise reduction effect of the ultrasonic flowmeter is improved.

Description

Technical Field

[0001] The utility model relates to the field of noise reduction of gas ultrasonic flowmeters, in particular to a noise reduction device for gas ultrasonic flowmeters. Background Art

[0002] Gas ultrasonic flow meter is a device used to measure gas flow. It uses ultrasonic technology to achieve non-contact measurement. Gas ultrasonic flow meter is widely used in energy management, process control and environmental monitoring in the industrial field. It is an efficient and accurate gas flow measurement technology.

[0003] When a gas ultrasonic flowmeter measures gas flow, when the gas flow rate in the pipeline increases, eddies and turbulence may be generated inside the pipeline. These turbulences will cause the gas to swirl and vibrate, thereby generating noise. Noise interference may cause distortion of the ultrasonic signal and a reduction in the signal-to-noise ratio, thus affecting the accuracy and stability of the flow measurement.

[0004] Considering that the existing gas ultrasonic flowmeter noise reduction devices usually reduce the impact of noise interference through noise reduction software algorithms, and considering that the ultrasonic noise formed between the gas and the pipeline may have complex characteristics, such as multipath propagation, reflection, diffraction and other phenomena, which leads to the reduction of the noise reduction effect of the ultrasonic flowmeter, a gas ultrasonic flowmeter noise reduction device is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a gas ultrasonic flowmeter noise reduction device, which aims to improve the problem that the noise reduction effect of the gas ultrasonic flowmeter in the prior art is poor under complex conditions through the noise reduction software algorithm, resulting in reduced noise reduction effect of the ultrasonic flowmeter.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gas ultrasonic flowmeter noise reduction device, comprising a noise reduction tube, the inner wall of the noise reduction tube is provided with a noise reduction component, and the right side of the noise reduction tube is provided with a clamping component;

[0007] The noise reduction component includes a silencer plate, the inner wall of the noise reduction pipe is fixedly connected with sound insulation cotton, the inner wall of the noise reduction pipe is fixedly connected with an acoustic absorbing plate, the inner wall of the sound insulation cotton is fixedly connected with a spiral silencer, and the outer wall of the silencer plate is provided with a silencer hole.

[0008] As a further description of the above technical solution:

[0009] The clamping assembly comprises a circular ring, the front inner wall of the circular ring is elastically connected with a wedge block via a spring, and a clamping groove is provided at the right end of the front side of the noise reduction pipe.

[0010] As a further description of the above technical solution:

[0011] A cavity is opened on the right side of the noise reduction pipe, acoustic foam is inserted into the inner wall of the cavity, and the inner wall of the acoustic absorbing plate is streamlined.

[0012] As a further description of the above technical solution:

[0013] The sound insulation cotton is provided in two groups, and the two groups of the sound insulation cotton are symmetrically distributed along the center line of the inner wall of the noise reduction pipe.

[0014] As a further description of the above technical solution:

[0015] The silencer plates are provided in two groups, and the two groups of silencer plates are symmetrically distributed along the center line of the inner wall of the noise reduction pipe.

[0016] As a further description of the above technical solution:

[0017] The outer circumference of the circular ring is plugged into the inner wall of the cavity, one end of the spring is fixedly connected to the front inner wall of the circular ring, and the other end of the spring is fixedly connected to the back of the wedge block.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the wedge block is slidably connected to the front inner wall of the ring, and the outer wall of the wedge block is clamped with the inner wall of the clamping groove.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, by providing a noise reduction component, the sound-absorbing plate, acoustic foam, sound insulation cotton, and acoustic absorbing plate can effectively absorb sound wave energy and reduce noise propagation. The spiral sound-absorbing plate can reduce eddy currents and turbulences generated during gas flow, thereby reducing the noise level and improving the noise reduction effect of the ultrasonic flow meter.

[0022] 2. In the utility model, a snap-on assembly is provided, and the snap-on or snap-off effect of the wedge block and the slot facilitates installation or removal of the ring, thereby facilitating removal and replacement of the acoustic foam, thereby improving the noise reduction effect and use effect of the noise reduction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall main structure of a gas ultrasonic flowmeter noise reduction device proposed by the utility model;

[0024] Figure 2 A schematic cross-sectional structure diagram of a noise reduction tube and acoustic foam of a noise reduction device for a gas ultrasonic flowmeter proposed by the utility model;

[0025] Figure 3This is a schematic cross-sectional structure diagram of a noise-reducing cotton and an acoustic wave-absorbing plate of a gas ultrasonic flowmeter noise reduction device proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the ring split structure of a gas ultrasonic flowmeter noise reduction device proposed by the utility model;

[0027] Figure 5 A gas ultrasonic flowmeter noise reduction device proposed by the utility model Figure 1 A schematic diagram of the enlarged structure of part A.

[0028] Legend:

[0029] 1. Noise reduction pipe; 2. Noise reduction component; 21. Acoustic foam; 22. Silencing board; 23. Sound insulation cotton; 24. Acoustic absorbing board; 25. Spiral silencing sheet; 26. Cavity; 27. Silencing hole; 3. Snap-on component; 31. Ring; 32. Spring; 33. Wedge block; 34. Slot. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1 The utility model provides an embodiment: a gas ultrasonic flow meter noise reduction device, including a noise reduction tube 1. By installing the noise reduction tube 1 at the input end of the flow meter, when the gas flows into the flow meter through the noise reduction tube 1, it can have a noise reduction effect on the flow meter. The inner wall of the noise reduction tube 1 is provided with a noise reduction component 2. Through the noise reduction component 2, the gas flowing through the noise reduction tube 1 has a wave absorbing and noise reduction effect. A clamping component 3 is provided on the right side of the noise reduction tube 1. Through the clamping component 3, the ring 31 is easily installed or disassembled, thereby facilitating the replacement of the acoustic foam 21.

[0032] Reference Figure 1-Figure 3The noise reduction component 2 includes a silencer plate 22, through which the noise generated by the gas flow can be absorbed and reduced. The inner wall of the noise reduction pipe 1 is fixedly connected with a sound insulation cotton 23, which is made of various sound-absorbing materials. The sound insulation cotton 23 can absorb and scatter sound waves to achieve a sound insulation effect. The inner wall of the noise reduction pipe 1 is fixedly connected with an acoustic absorbing plate 24, which is a plate-shaped material for absorbing sound wave energy. It can effectively absorb the sound waves generated by the fluid inside the noise reduction pipe 1 and reduce the propagation and reflection of sound. The inner wall of the sound insulation cotton 23 is fixedly connected with a spiral silencer plate 25. The spiral shape of the spiral silencer plate 25 can reduce the eddy and turbulence generated by the fluid in the pipeline, thereby further reducing the noise level. The outer wall of the silencer plate 22 is provided with a silencer hole 27, and the silencer hole 27 is provided with a plurality of groups. The silencer hole 27 can increase the sound absorption surface area of ​​the silencer plate 22 and improve the noise reduction effect.

[0033] Reference Figure 4 and Figure 5 The clamping assembly 3 includes a circular ring 31, and the inner wall of the front side of the circular ring 31 is elastically connected with a wedge block 33 through a spring 32. Through the elastic force of the spring 32, the wedge block 33 always maintains the clamping effect with the clamping groove 34 without being affected by external force, thereby limiting the circular ring 31 and keeping the circular ring 31 fixed. A clamping groove 34 is opened at the right end of the front side of the noise reduction pipe 1, and the clamping groove 34, the wedge block 33 and the spring 32 are symmetrically distributed in two groups to improve the stability of the circular ring 31.

[0034] Reference Figure 2 and Figure 3 A cavity 26 is opened on the right side of the noise reduction pipe 1, and an acoustic foam 21 is inserted into the inner wall of the cavity 26. The acoustic foam 21 absorbs sound wave energy to reduce noise propagation and reflection. The inner wall of the acoustic absorbing plate 24 is streamlined. By setting the inner wall of the acoustic absorbing plate 24 to be streamlined, it helps to smooth the gas flow and reduce turbulence and eddy currents in the noise reduction pipe 1, thereby reducing the friction noise generated with the surface of the acoustic absorbing plate 24.

[0035] Reference Figure 2 Two groups of sound insulation cotton 23 are provided, and the two groups of sound insulation cotton 23 are symmetrically distributed along the center line of the inner wall of the noise reduction pipe 1. By providing two groups of sound insulation cotton 23, the noise reduction effect of the noise reduction pipe 1 is improved. Two groups of sound insulation plates 22 are provided, and the two groups of sound insulation plates 22 are symmetrically distributed along the center line of the inner wall of the noise reduction pipe 1. By providing two groups of sound insulation plates 22, the input end and the output end of the noise reduction pipe 1 are both noise-reducing.

[0036] Reference Figure 1 and Figure 4The outer periphery of the ring 31 is inserted into the inner wall of the cavity 26, the left side of the ring 31 contacts the right side of the acoustic foam 21, one end of the spring 32 is fixedly connected to the front inner wall of the ring 31, and the other end of the spring 32 is fixedly connected to the back side of the wedge block 33. The fixing effect of the spring 32 keeps the wedge block 33 fixed to prevent the wedge block 33 from falling off.

[0037] Reference Figure 4 The outer wall of the wedge block 33 is slidably connected to the front inner wall of the ring 31. Through the sliding effect of the wedge block 33, the wedge block 33 and the slot 34 are engaged or released. The outer wall of the wedge block 33 is engaged with the inner wall of the slot 34. Through the engagement effect of the wedge block 33 and the slot 34, the noise reduction tube 1 limits the ring 31.

[0038] Working principle: When the flow meter needs to be denoised, the staff presses the wedge 33 to release the clamping effect of the wedge 33 on the slot 34 and release the limiting effect on the ring 31. The staff inserts the acoustic foam 21 into the cavity 26 and inserts the ring 31 into the cavity 26 so that the left side of the ring 31 contacts the right side of the acoustic foam 21. The elastic force of the spring 32 causes the wedge 33 to clamp with the slot 34, thereby limiting the ring 31 and keeping the ring 31 and the acoustic foam 21 fixed.

[0039] The staff installs the left side of the noise reduction pipe 1 at the input end of the flow meter. When the gas enters the noise reduction pipe 1, part of the noise is absorbed by the silencer plate 22, and the noise sound waves are absorbed and scattered by the sound insulation cotton 23 for secondary silencer. The noise is further absorbed by the spiral silencer 25 and the acoustic absorbing plate 24, and the eddy currents and turbulences generated during the gas flow are reduced, thereby further silencing the noise. The acoustic foam 21 absorbs the sound wave energy and reduces the propagation of noise, thereby improving the noise reduction effect of the flow meter.

[0040] When the acoustic foam 21 is worn due to long-term squeezing and friction, the staff presses the wedge block 33 to release the clamping effect of the wedge block 33 on the slot 34 and release the limiting effect on the ring 31. The staff disassembles the ring 31 to open the cavity 26, making it easier for the staff to disassemble and replace the acoustic foam 21, thereby improving the use effect of the noise reduction device.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas ultrasonic flowmeter noise reduction device, comprising a noise reduction tube (1), characterized in that: The inner wall of the noise reduction pipe (1) is provided with a noise reduction component (2), and the right side of the noise reduction pipe (1) is provided with a clamping component (3); The noise reduction component (2) comprises a sound-absorbing plate (22), the inner wall of the noise reduction pipe (1) is fixedly connected with a sound-insulating cotton (23), the inner wall of the noise reduction pipe (1) is fixedly connected with an acoustic wave-absorbing plate (24), the inner wall of the sound-insulating cotton (23) is fixedly connected with a spiral sound-absorbing plate (25), and the outer wall of the sound-insulating plate (22) is provided with a sound-absorbing hole (27).

2. A gas ultrasonic flowmeter noise reduction device according to claim 1, characterized in that: The clamping assembly (3) comprises a circular ring (31), the front inner wall of the circular ring (31) is elastically connected to a wedge block (33) via a spring (32), and a clamping groove (34) is provided at the right end of the front side of the noise reduction pipe (1).

3. A gas ultrasonic flowmeter noise reduction device according to claim 1, characterized in that: A cavity (26) is provided on the right side of the noise reduction pipe (1), an acoustic foam (21) is inserted into the inner wall of the cavity (26), and the inner wall of the acoustic absorbing plate (24) is streamlined.

4. A gas ultrasonic flow meter noise reduction device according to claim 1, characterized in that: Two groups of the sound insulation cotton (23) are provided, and the two groups of the sound insulation cotton (23) are symmetrically distributed along the center line of the inner wall of the noise reduction pipe (1).

5. A gas ultrasonic flow meter noise reduction device according to claim 1, characterized in that: Two groups of the silencer plates (22) are provided, and the two groups of the silencer plates (22) are symmetrically distributed along the center line of the inner wall of the noise reduction pipe (1).

6. A gas ultrasonic flow meter noise reduction device according to claim 2, characterized in that: The outer periphery of the circular ring (31) is plugged into the inner wall of the cavity (26), one end of the spring (32) is fixedly connected to the front inner wall of the circular ring (31), and the other end of the spring (32) is fixedly connected to the back side of the wedge block (33).

7. A gas ultrasonic flow meter noise reduction device according to claim 6, characterized in that: The outer wall of the wedge block (33) is slidably connected to the front inner wall of the ring (31), and the outer wall of the wedge block (33) is clamped to the inner wall of the clamping groove (34).

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