Ultrasonic fluid measuring device

Abstract

The utility model creatively provides an ultrasonic fluid measuring device which comprises a measuring tube, two groups of ultrasonic transducers and at least one group of reflecting devices are arranged in the measuring tube, the ultrasonic transducers and the reflecting devices are arranged along the length direction of the measuring tube, the reflecting devices are arranged between the two groups of ultrasonic transducers, and the reflecting devices are arranged on the measuring tube. The reflection device can reflect ultrasonic waves of one group of ultrasonic transducers to the other group of ultrasonic transducers; the utility model has the advantages that the problem of low measurement precision caused by short ultrasonic measurement sound path distance in ultrasonic fluid measurement can be solved, the measurement precision is high, and the device is easy to manufacture and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid detection, and more specifically to an ultrasonic fluid measuring device. Background Art

[0002] Ultrasonic fluid measurement generally consists of a transducer and a measuring pipe section. The transducer is generally installed on both sides of the measuring pipe section, and the transducer is directly aligned. This structure causes the ultrasonic sound path to be relatively short, thus affecting the ultrasonic measurement accuracy. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an ultrasonic fluid measuring device to overcome the above-mentioned defects in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An ultrasonic fluid measuring device comprises a measuring tube, wherein two groups of ultrasonic transducers and at least one group of reflecting devices are arranged in the measuring tube, the ultrasonic transducers and the reflecting devices are arranged along the length direction of the measuring tube, the reflecting device is located between the two groups of ultrasonic transducers, and the reflecting device can reflect the ultrasonic wave of one group of ultrasonic transducers to the other group of ultrasonic transducers.

[0006] Furthermore, a flow guiding device for causing the fluid to spiral is provided on the port of the measuring tube.

[0007] Furthermore, the flow guide device includes a flow guide sleeve, and a plurality of turbofan blades are fixedly provided on the inner side wall of the flow guide sleeve.

[0008] Furthermore, a fixing sleeve is provided inside the guide sleeve, and one end of each turbofan blade away from the guide sleeve is fixed on the outer side surface of the fixing sleeve.

[0009] Furthermore, the flow guide device comprises a flow guide sleeve, and a plurality of mutually staggered flow guide plates are arranged on the inner side wall of the flow guide sleeve, and the flow guide plates have a flow guide arc surface.

[0010] Furthermore, the flow guiding device includes one provided at any port of the measuring tube or two provided at ports at both ends of the measuring tube.

[0011] Furthermore, the ultrasonic transducer has an emission angle with respect to the length direction of the measuring tube.

[0012] Furthermore, the ultrasonic transducer is a magnetostrictive ultrasonic transducer or a piezoelectric ceramic ultrasonic transducer.

[0013] Furthermore, the reflection device is odd in number, and the two groups of ultrasonic transducers are located on the same side of the measuring tube.

[0014] Furthermore, the reflection devices are in even number, and the two groups of ultrasonic transducers are located on opposite sides of the measuring tube.

[0015] The beneficial effects of the utility model are as follows: the reflecting device is closely attached to the pipe wall, which greatly reduces the interference to the fluid; the ultrasonic transducer is then tiltedly arranged on the pipe wall, so that the ultrasonic wave emitted by the ultrasonic transducer is reflected by the reflecting device and then received by another ultrasonic transducer, which can solve the problem of low measurement accuracy caused by short ultrasonic measurement sound path in ultrasonic fluid measurement; and the spiral characteristics of the set flow guide device have a significant improvement effect on the flow field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 is a structural diagram of the flow guide device in Example 1;

[0018] Figure 3 is a structural diagram of the flow guide device in Example 2;

[0019] Figure 4 This is a structural diagram of the guide device in Example 3.

[0020] Figure numerals: 1. measuring tube; 2. ultrasonic transducer; 3. reflecting device; 4. flow guide device; 41. flow guide sleeve; 42. turbofan blade; 43. fixing sleeve; 44. flow guide plate. DETAILED DESCRIPTION

[0021] 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.

[0022] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0025] The transducer is generally installed on both sides of the pipe section measuring section, and the transducer is directly aligned. This structure causes the ultrasonic sound path to be relatively short, thereby affecting the ultrasonic measurement accuracy. Therefore, the utility model designs such an ultrasonic fluid measurement device, such as Figure 1 As shown, the measuring tube 1 includes a measuring tube 1, wherein the measuring tube 1 can be a round tube, an elliptical tube or a square tube, and two groups of ultrasonic transducers 2 and at least one group of reflecting devices 3 are arranged in the measuring tube 1. The ultrasonic transducers 2 and the reflecting devices 3 are arranged along the length direction of the measuring tube 1, and the reflecting device 3 is located between the two groups of ultrasonic transducers 2. The reflecting device 3 can reflect the ultrasonic wave of one group of ultrasonic transducers 2 to the other group of ultrasonic transducers 2. The measuring principle is: the fluid to be measured flows in through one port of the measuring tube 1, and passes through the ultrasonic transducer 2, the reflecting device 3 and the ultrasonic transducer 2 in sequence, and finally flows out from the other port of the measuring tube 1, and the ultrasonic transducer 2 is used to send the ultrasonic wave to the reflecting device 3, and then the ultrasonic wave is reflected by the reflecting device 3 to another ultrasonic transducer 2, and the time of one ultrasonic wave transmission is obtained, and then the ultrasonic transducer 2 sends the ultrasonic wave and is reflected by the reflecting device 3 back to the original ultrasonic transducer 2, and the time of one reverse ultrasonic wave transmission is obtained. By utilizing the influence of the fluid flow rate on the ultrasonic wave transmission speed, according to the time difference of the ultrasonic wave round-trip transmission and the corresponding pipeline parameters, the flow rate and flow rate of the fluid flowing through the measuring tube 1 can be calculated.

[0026] The ultrasonic transducer 2 in the utility model is a magnetostrictive ultrasonic transducer 2 or a piezoelectric ceramic ultrasonic transducer 2, wherein the ultrasonic transducer 2 is completely wrapped by the material, thereby avoiding direct contact with the measured fluid, and also avoiding the deposition of debris. The material should have good ultrasonic permeability and is not easy to produce scaling. The optimal setting position of the two sets of ultrasonic transducers 2 is: assuming that the measuring tube 1 is a round tube, the two sets of ultrasonic transducers 2 are respectively located on the diameter of the round tube, that is, the connection distance of the two sets of ultrasonic transducers 2 is the diameter distance of the round tube; and the ultrasonic transducer 2 has an emission angle with the length direction of the measuring tube 1, and this angle is determined according to the size of the measuring straight tube and the distance between the transducers, that is, the emission ports of the two sets of ultrasonic transducers 2 are relatively set.

[0027] The reflecting device 3 is made of metal or other materials that are easy to reflect ultrasonic waves, and is close to the measuring tube 1, thereby greatly reducing the interference to the fluid and greatly improving the fluid measurement accuracy. When the reflecting device 3 is odd, the two groups of ultrasonic transducers 2 are located on the same side of the measuring tube 1, that is, there is one reflecting device 3, and the connection between the two groups of ultrasonic transducers 2 and the reflecting device 3 is a "V" shape. When the reflecting device 3 is even, the two groups of ultrasonic transducers 2 are located on opposite sides of the measuring tube 1, that is, there are two reflecting devices 3, and the connection between the two groups of ultrasonic transducers 2 and the reflecting device 3 is two opposite "V" shapes.

[0028] like Figure 1 As shown, a flow guide device 4 for causing the fluid to spiral is provided on the port of the measuring tube 1. The flow guide device 4 includes one provided at any port of the measuring tube 1 or two provided at the ports at both ends of the measuring tube 1. When the flow guide device 4 is not provided, the fluid enters from one end of the measuring tube 1 and flows out from the other end, and the flow of the fluid is prone to be uneven. Therefore, a flow guide device 4 with a spiral feature is provided, which can cause the fluid to generate a spiral vortex under the influence of the flow guide device 4, so that the fluid flows concentratedly to the middle of the measuring tube 1 and evenly, thereby improving the characteristics of the fluid flow field for better ultrasonic measurement.

[0029] Embodiment 1:

[0030] like Figure 2 As shown, the flow guide device 4 includes a flow guide sleeve 41, the outer diameter of the flow guide sleeve 41 is the same as the inner diameter of the measuring tube 1, that is, the flow guide sleeve 41 is tightly matched with the measuring tube 1, and a plurality of turbofan blades 42 are fixedly provided on the inner wall of the flow guide sleeve 41, and two adjacent turbofan blades 42 are disconnected, and the end of each turbofan blade 42 away from the flow guide sleeve 41 is also disconnected.

[0031] Embodiment 2:

[0032] like Figure 3 As shown, the flow guide device 4 includes a flow guide sleeve 41, the outer diameter of the flow guide sleeve 41 is the same as the inner diameter of the measuring tube 1, that is, the flow guide sleeve 41 is tightly matched with the measuring tube 1, and a plurality of turbofan blades 42 are fixedly provided on the inner wall of the flow guide sleeve 41. A fixed sleeve 43 is also provided inside the flow guide sleeve 41, and one end of each turbofan blade 42 away from the flow guide sleeve 41 is fixed on the outer surface of the fixed sleeve 43.

[0033] Embodiment 3:

[0034] like Figure 4 As shown, the flow guide device 4 includes a flow guide sleeve 41, the outer diameter of the flow guide sleeve 41 is the same as the inner diameter of the measuring tube 1, that is, the flow guide sleeve 41 is tightly matched with the measuring tube 1, and a plurality of mutually staggered flow guide pieces 44 are provided on the inner side wall of the flow guide sleeve 41, and the flow guide pieces 44 have a flow guide arc surface, that is, the flow guide pieces 44 are in a twisted state.

[0035] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An ultrasonic fluid measuring device, comprising a measuring tube (1), Features: Two groups of ultrasonic transducers (2) and at least one group of reflecting devices (3) are arranged in the measuring tube (1); the ultrasonic transducers (2) and the reflecting devices (3) are arranged along the length direction of the measuring tube (1); the reflecting device (3) is located between the two groups of ultrasonic transducers (2); and the reflecting device (3) is capable of reflecting ultrasonic waves from one group of ultrasonic transducers (2) to the other group of ultrasonic transducers (2).

2. An ultrasonic fluid measuring device according to claim 1, Features: A flow guiding device (4) for causing the fluid to spiral is provided on the port of the measuring tube (1).

3. An ultrasonic fluid measuring device according to claim 2, Features: The flow guide device (4) comprises a flow guide sleeve (41), and a plurality of turbofan blades (42) are fixedly provided on the inner side wall of the flow guide sleeve (41).

4. An ultrasonic fluid measuring device according to claim 3, Features: A fixing sleeve (43) is also provided inside the guide sleeve (41), and one end of each turbofan blade (42) away from the guide sleeve (41) is fixed on the outer surface of the fixing sleeve (43).

5. The ultrasonic fluid measuring device according to claim 2, Features: The flow guide device (4) comprises a flow guide sleeve (41), and a plurality of mutually staggered flow guide pieces (44) are provided on the inner side wall of the flow guide sleeve (41), and the flow guide pieces (44) have flow guide arc surfaces.

6. An ultrasonic fluid measuring device according to any one of claims 3 to 5, Features: The flow guide device (4) comprises one device arranged at any port of the measuring tube (1) or two devices arranged at ports at both ends of the measuring tube (1).

7. An ultrasonic fluid measuring device according to claim 6, Features: The ultrasonic transducer (2) has an emission angle with respect to the length direction of the measuring tube (1).

8. An ultrasonic fluid measuring device according to claim 7, Features: The ultrasonic transducer (2) is a magnetostrictive ultrasonic transducer (2) or a piezoelectric ceramic ultrasonic transducer (2).

9. An ultrasonic fluid measuring device according to claim 8, Features: The reflection device (3) is odd in number, and the two groups of ultrasonic transducers (2) are located on the same side of the measuring tube (1).

10. The ultrasonic fluid measuring device according to claim 8, Features: The reflection devices (3) are in even number, and the two groups of ultrasonic transducers (2) are located on opposite sides of the measuring tube (1).

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