A bionic ultrasonic gas flow meter

Abstract

The present invention provides a bionic ultrasonic gas flowmeter, which includes a shell, the shell is a cavity with two open ends, the two ends of the shell are respectively connected to a front cover and a rear cover, the front cover is provided with an air inlet, and the rear cover is provided with an air outlet; a flow guide cover and a baffle are provided in the cavity, a support plate is provided between the flow guide cover and the inner wall of the cavity, a first spacing is provided between the lower end surface of the flow guide cover and the baffle, a first through hole is provided on the baffle, a plurality of rectifier plates are provided in the first through hole, the first through hole is connected to the air inlet of an ultrasonic module, and the air outlet of the ultrasonic module is connected to the air outlet. The bionic ultrasonic gas flowmeter of the present invention has a novel structural design, is easy to use, has a good rectification effect, and has high precision measurement accuracy.

Description

Technical Field

[0001] The invention relates to a gas flow meter, in particular to a bionic ultrasonic gas flow meter. Background Art

[0002] Gas flowmeter is an instrument for measuring gas flow. Ultrasonic flowmeter is the most commonly used gas flowmeter. The working principle of ultrasonic flowmeter is to use two obliquely opposed ultrasonic probes to send and receive a set of ultrasonic signals respectively, and calculate the flow rate of the gas according to the propagation time of the ultrasonic wave. Therefore, in order to measure the flow rate more accurately, it is necessary to first ensure the stability of the gas flow passing through the detection part of the probe. Therefore, it is particularly important to design a rectifier flow channel that can effectively reduce airflow fluctuations in the field of ultrasonic measurement. The ultrasonic flowmeter currently used in the market has a relatively closed design of the flow channel. It is different from general products that can be directly accessed by the public, so the structural style of its design varies from manufacturer to manufacturer. After investigation, it was found that most manufacturers did not have a perfect airflow rectification design for the flow channel of the ultrasonic flowmeter. Since the gas flowing into the source may be subject to various factors such as pressure, temperature, and pipeline structure, causing unstable airflow and vortex phenomena, the unstable gas directly passing through the ultrasonic probe will have a certain adverse effect on the detection results, and ultimately cause problems such as large measurement errors. Summary of the invention

[0003] Technical issues to be solved

[0004] The technical problem to be solved by the present invention is to provide a bionic ultrasonic gas flow meter which has novel structural design, convenient use, good rectification effect and high precise measurement accuracy.

[0005] Technical solutions to the problem

[0006] The present invention provides a bionic ultrasonic gas flowmeter, which includes a shell, wherein the shell is a cavity with open ends, and the two ends of the shell are respectively connected to a front cover and a rear cover, the front cover is provided with an air inlet, and the rear cover is provided with an air outlet; a flow guide cover and a baffle are provided in the cavity, a support plate is provided between the flow guide cover and the inner wall of the cavity, a first distance is provided between the lower end surface of the flow guide cover and the baffle, a first through hole is provided on the baffle, a plurality of rectifier plates are provided in the first through hole, the first through hole is connected to the air inlet of an ultrasonic module, and the air outlet of the ultrasonic module is connected to the air outlet.

[0007] Furthermore, a cylindrical protrusion is provided on the baffle, and a guide groove is provided on the outer side of the protrusion.

[0008] Furthermore, the air deflector is a hollow hemisphere, the opening of the air deflector faces the protrusion, and the diameter of the air deflector is greater than the diameter of the protrusion.

[0009] Furthermore, there are three rectifier plates in total, and a second interval is provided between every two adjacent rectifier plates.

[0010] Furthermore, the cross section of the rectifying plate is in the shape of a teardrop.

[0011] Furthermore, a placement groove matched with the air inlet is provided on the first through hole, and the placement groove and the air inlet are interference fit.

[0012] Furthermore, the ultrasonic module is mounted on the back cover by screws.

[0013] Furthermore, the housing and the front cover and the rear cover are respectively locked with bolts and nuts.

[0014] Furthermore, there are three support plates in total.

[0015] Beneficial Effects

[0016] The bionic ultrasonic gas flow meter of the present invention has novel structural design, is easy to use, has good rectification effect and high precision measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the bionic ultrasonic gas flowmeter of the present invention;

[0018] Figure 2 for Figure 1 AA section view in the figure;

[0019] Figure 3 It is a structural schematic diagram of the ultrasonic module in the bionic ultrasonic gas flowmeter of the present invention;

[0020] Figure 4 It is a left view of the shell of the bionic ultrasonic gas flow meter of the present invention;

[0021] Figure 5 It is a right view of the shell of the bionic ultrasonic gas flowmeter of the present invention. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] See also Figures 1 to 5The present invention provides a bionic ultrasonic gas flowmeter, which includes a shell 1, which is cylindrical, and a cavity 11 with two open ends is arranged in the cylindrical shell 1, and the two ends of the shell 1 are respectively connected to a front cover 2 and a rear cover 3, the front cover 2 is provided with an air inlet 21, and the rear cover 3 is provided with an air outlet 31, and the interior of the shell 1, the front cover 2 and the rear cover 3 are all designed as a rotating body; a guide cover 13 and a baffle 12 are arranged in the cavity 11, and a gap is left between the guide cover 13 and the inner wall of the cavity 11 A support plate 14 is provided in this gap, and the support plate 14 connects the outer wall of the air deflector 13 and the inner wall of the cavity 11. In this embodiment, there are three support plates 14. A first spacing is provided between the lower end surface of the air deflector 13 and the baffle 12. A first through hole 17 is provided at the center position of the baffle 12. A plurality of rectifying plates 18 are provided in the first through hole 17. The rear end of the first through hole 17 is connected to the air inlet 41 of the ultrasonic module 4, and the air outlet 41 of the ultrasonic module 4 is connected to the air outlet 31.

[0024] In order to achieve the effect of facilitating rectification, in the present embodiment, a cylindrical protrusion is provided on the baffle 12, a first through hole 17 is provided at the center of the protrusion, and a guide groove 19 is provided on the outer side of the protrusion; further, the deflector 13 is a hollow hemisphere, the center of the deflector 13 is coaxially arranged with the center of the first through hole 17, the opening of the deflector 13 faces the protrusion, and the diameter of the deflector 13 is larger than the diameter of the protrusion.

[0025] In order to further achieve the effect of facilitating rectification, in this embodiment, there are three rectifying plates 18 , and a second interval is provided between every two adjacent rectifying plates 18 ; the cross section of the rectifying plate 18 is in a teardrop shape.

[0026] In order to achieve a sealing effect, in this embodiment, a placement groove 20 that cooperates with the air inlet 41 is provided on the rear end surface of the first through hole 17. The placement groove 20 and the air inlet 41 are interference fit. The advantage of choosing an interference fit is that it can prevent gas leakage.

[0027] In order to facilitate installation, in this embodiment, the ultrasonic module 4 is installed on the back cover 3 by screws, and a first hanging ear 42 is respectively provided on the two side walls of the lower end surface of the ultrasonic module 4, and a second through hole 43 for the screw to pass through is provided on the first hanging ear 42, and a bolt column cooperating with the screw is provided on the back cover 3, and an internal threaded hole cooperating with the screw is provided in the bolt column.

[0028] In order to further achieve the effect of facilitating installation, in the present embodiment, the shell 1 and the front cover 2 and the rear cover 3 are respectively locked with bolts and nuts, a second hanging ear 15 is provided on the outer wall at both ends of the shell 1, and a third through hole for allowing the bolt to pass through is provided on the second hanging ear 15, and a third hanging ear cooperating with the second hanging ear 15 is provided on the side walls of the front cover 2 and the rear cover 3, respectively, and a fourth through hole for allowing the bolt to pass through is provided on the third hanging ear, and the third and fourth through holes through which the bolt passes are then locked with nuts.

[0029] The working principle of the bionic ultrasonic gas flowmeter of the present invention is described in detail in combination with the above-mentioned embodiments: in this embodiment, the gas flows in from the air inlet 21 of the front cover 2, and encounters the fairing 13 after entering the flow channel. Since the shell 1 is a rotating body as a whole, the fairing 13 disperses the gas evenly, and then passes through the guide groove 19 and converges to the inside of the guide cover 13. Also thanks to the structure of the rotating body, the gas in the guide cover 13 is evenly squeezed and flows into the rectifying plate 18. The rectifying plate is designed to imitate the shape of a bird's wing. The head of the bird's wing is slightly protruding, and gradually flattens from the head to the tail, and the bottom is flat from head to tail. Due to the dependence of the airflow, the airflow path above will be longer than the path below, and the flow rate will be faster. This design is formed according to the shape of the bird's wing. In view of the airflow dependence, an airflow rectifying plate with a water drop-shaped cross-section is designed. When the airflow meets the front end of the rectifying plate 18, the curved surface of the rectifying plate 18 will cut the airflow into two airflows, and the cut airflow will adhere to the surrounding of the surface of the rectifying plate 18. After the airflow flows to the end of the rectifying plate 18, the two airflows merge together again. Since the end of the rectifying plate 18 is thinner, a vortex cannot be formed here, and the characteristics of the airflow dependence on the surface of the rectifying plate 18 constrain the airflow. Therefore, the airflow flowing through the rectifying plate 18 will be more stable than before flowing through the rectifying plate, thereby playing a rectifying role. The rectified gas passes through the ultrasonic module 4 to obtain more accurate flow rate data. After detection by the ultrasonic module 4, the airflow enters the air outlet of the ultrasonic module 4 and is discharged from the air outlet 31.

[0030] The bionic ultrasonic gas flow meter of the present invention has novel structural design, is easy to use, has good rectification effect and high precision measurement accuracy.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bionic ultrasonic gas flow meter, Features: The invention comprises a shell, wherein the shell is a cavity with two open ends, and the two ends of the shell are respectively connected to a front cover and a rear cover, the front cover is provided with an air inlet, and the rear cover is provided with an air outlet; a shroud and a baffle are provided in the cavity, a support plate is provided between the shroud and the inner wall of the cavity, a first distance is provided between the lower end surface of the shroud and the baffle, a first through hole is provided on the baffle, a plurality of rectifier plates are provided in the first through hole, the first through hole is connected to the air inlet of the ultrasonic module, and the air outlet of the ultrasonic module is connected to the air outlet; The baffle is provided with a cylindrical protrusion, the first through hole is arranged at the center of the protrusion, a guide groove is arranged on the outer side of the protrusion, the guide cover is a hollow hemisphere, the opening of the guide cover faces the protrusion, and the diameter of the guide cover is larger than the diameter of the protrusion; There are three rectifier plates in total, a second spacing is provided between every two adjacent rectifier plates, and the cross section of the rectifier plate is in a water drop shape.

2. The bionic ultrasonic gas flow meter according to claim 1, Features: The first through hole is provided with a placement groove matched with the air inlet, and the placement groove and the air inlet are interference-fitted.

3. The bionic ultrasonic gas flow meter according to claim 1, Features: The ultrasonic module is mounted on the rear cover by screws.

4. The bionic ultrasonic gas flow meter according to claim 1, Features: The housing, the front cover and the rear cover are locked together by bolts and nuts.

5. The bionic ultrasonic gas flow meter according to claim 1, Features: There are three supporting plates in total.

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