Small-caliber ultrasonic liquid measuring device

Abstract

The utility model relates to the technical field of flow detection instruments, in particular to a small-caliber ultrasonic liquid measuring device which comprises an outer pipe, an ultrasonic transducer and an inner pipe, the inner pipe is fixed in the outer pipe through a positioning structure, the inner pipe is provided with a bent S-shaped testing flow channel, the section of the testing flow channel is rectangular, and the section of the testing flow channel is kept unchanged in the whole testing area; a reflector plate is arranged at a key part to enhance the signal reflection effect; the ultrasonic transducer is fixed to the outer tube in the direction perpendicular to the axial direction. Compared with a traditional insertion piece type reflection scheme, a column type reflection scheme and an M type reflection scheme, the design optimizes a fluid flowing path, the advantage of low pressure loss of a straight-through type test flow channel is kept, meanwhile, the influence of fluid disturbance on a measurement result is reduced through a special structure, and the measurement precision and stability are improved. According to the invention, low-pressure-loss, high-dynamic and high-precision metering requirements are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow detection instruments, in particular to a small-bore ultrasonic liquid measuring device. BACKGROUND

[0002] The ultrasonic liquid measuring device is widely used in industrial production, energy management and environmental monitoring, etc. It provides key data support for resource allocation and control by accurately measuring liquid flow parameters. With the development of technology, such devices gradually evolve towards miniaturization and high precision, and play an important role in reducing energy consumption and improving system efficiency. However, with the increasing diversification of application requirements, how to balance measurement accuracy and device compactness has become the focus of the industry.

[0003] For the problem of liquid flow measurement in small-bore pipes, the existing plug-type reflection scheme and column-type reflection scheme reduce the flow area of the test area to improve the flow rate, which will cause a large pressure loss. And the reflection sheet or reflection column will cause the flow state of the measured fluid to be disturbed, affecting the measurement accuracy. In order to solve the above problems, a straight-through test flow channel design is usually used to reduce the pressure loss. Specifically, one method is to enlarge the flow area to reduce fluid resistance; another way is to add flow guide components in the pipe to optimize the flow state. In addition, some schemes try to use multi-point sampling technology to improve data representativeness, or use special material inner tubes to improve surface properties to promote laminar flow formation. These measures have certain limitations, especially in terms of reducing the test area while maintaining sufficient measurement accuracy. For example, simply relying on increasing the flow area will cause the water flow rate to decrease, thereby affecting the time difference determination sensitivity, and the complex flow state after increasing the flow area may cause error fluctuations to increase. Therefore, it is urgent to develop a new structure to solve this problem and ensure that more stable and reliable measurement results can be obtained while maintaining a low pressure loss level. CONTENT OF THE INVENTION

[0004] The present application provides a small-bore ultrasonic liquid measuring device, which adopts the following technical scheme:

[0005] The device comprises an outer pipe, an ultrasonic transducer and an inner pipe. The inner pipe is placed in the outer pipe and fixed. The ultrasonic transducer is installed on the outer pipe. The inner pipe is provided with a plurality of reflection sheets. A test flow channel is formed in the inner pipe. The test flow channel is curved and shaped like an S.

[0006] By adopting the technical scheme, the purpose of effectively improving the measurement precision without increasing the pressure loss is achieved. The design of the S-shaped test flow channel makes the effective test area smaller, thereby avoiding the problem of complex water flow state caused by excessively large flow area, and further improving the stability and error repeatability of the measured time difference value. Meanwhile, compared with the traditional straight-through test flow channel, the design can optimize the fluid flow characteristics while maintaining the same flow range, further improving the accuracy and reliability of the measurement results.

[0007] Preferably, the ultrasonic transducer is installed vertically along the axis of the inner tube.

[0008] By adopting the technical scheme, vertical installation can maintain the flatness of the outer tube, reduce the remaining installation holes (compared with inclined installation), and reduce the influence of the accumulation of impurities in the installation holes on the ultrasonic signal.

[0009] Preferably, the cross section of the test flow channel is rectangular.

[0010] By adopting the technical scheme, the cross section of the test flow channel is designed as a rectangle, which can optimize the fluid flow state.

[0011] Preferably, the rectangle is a rounded rectangle.

[0012] By adopting the technical scheme, compared with other shapes of cross section, the rounded rectangle can reduce the turbulence and vortex phenomenon of the fluid in the test flow channel while ensuring a large flow area, thereby improving the stability of the fluid flow. This helps to reduce the measurement error caused by unstable flow state and improves the precision and reliability of the ultrasonic liquid measuring device.

[0013] Preferably, the cross section of the test flow channel length direction test area remains unchanged and is formed with a flared portion at both ends of the test flow channel.

[0014] By adopting the technical scheme, the flared portion helps to reduce the turbulence phenomenon caused by sudden changes when the fluid enters and exits the test flow channel, thereby reducing the influence of unstable flow state on the measurement results. At the same time, the design can further improve the uniformity of the fluid distribution in the test area while maintaining a large flow area, thereby improving the stability and error repeatability of the measured time difference value.

[0015] Preferably, the S-shaped test flow channel includes a single S-shaped test flow channel or a combination of multiple S-shaped test flow channels.

[0016] By adopting the technical scheme, the selection of multiple flow channel structures at the same time increases the design flexibility and meets the measurement requirements in different application scenarios.

[0017] Preferably, the inner wall of the inner tube is provided with a projection hole and a wave guide groove along the propagation path of the ultrasonic signal.

[0018] By adopting the above technical solution, the ultrasonic wave can accurately pass through the projection hole into the inside of the flow channel and propagate along the designated path, thereby effectively improving the transmission efficiency and detection accuracy of the ultrasonic signal. The design simplifies the installation structure of the ultrasonic transducer and ensures that the positional relationship between the ultrasonic transducer and the flow channel is more stable and reliable.

[0019] Preferably, the inner wall of the inner tube is provided with a projection hole and a wave guide groove along the propagation path of the ultrasonic signal.

[0020] By adopting the above technical solution, the installation slot and the insertion slot are provided to facilitate the fixation of the reflecting sheet and ensure the stable position of the reflecting sheet in the inner tube, thereby improving the accuracy of ultrasonic measurement.

[0021] In summary, the present application has at least one of the following beneficial technical effects:

[0022] 1. The design of the equal cross-section test flow channel shape and structure helps to maintain a low pressure loss level;

[0023] 2. The S-shaped test flow channel design effectively reduces the test area without reducing the flow area, making the measured time difference more stable and significantly improving the error repeatability;

[0024] 3. The S-shaped test flow channel arranged in a curved manner can optimize the water flow state distribution and avoid the complex flow state problem caused by the increase of the flow area, thereby reducing the error jump. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of an embodiment of the present application;

[0026] Figure 2 is a partial exploded view of an embodiment of the present application;

[0027] Figure 3 is a perspective view of an inner tube;

[0028] Figure 4 is a sectional view of a small-diameter ultrasonic liquid measuring device.

[0029] In the drawings, reference numeral 1 denotes an outer tube; 2, an ultrasonic transducer; 3, an inner tube; 31, a reflecting sheet; 32, a test flow channel; 33, an expanded portion; 34, a projection hole; 36, a wave guide groove; and 37, an insertion slot. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying drawings. Figures 1-4 The present application will be further described in detail.

[0031] The small-bore ultrasonic liquid measuring device provided by the embodiments of the present application refers to Figure 1 , Figure 3 and Figure 3 , comprising an outer tube 1, an ultrasonic transducer 2 and an inner tube 3, the inner tube 3 is placed in the outer tube 1 and fixed, the ultrasonic transducer 2 is installed on the outer tube 1, the inner tube 3 is provided with a plurality of reflecting pieces 31, and a test flow channel 32 is arranged in the inner tube 3. The test flow channel 32 is curved in shape and arranged in an S shape. The test flow channel 32 is used for the circulation of liquid, effectively reduces the test area under the premise of not reducing the circulation area, so that the time difference value measured is more stable, and the shape of the test flow channel 32 is curved and arranged in an S shape. Specifically, according to the actual situation, the S-shaped test flow channel 32 includes a single S-shaped test flow channel 32 or a combination of a plurality of S-shaped test flow channels 32. In order to effectively reduce the vortex and resistance generated when the water flow passes through, so that the water flow is more smooth and smooth, the cross section of the test flow channel 32 is a rounded rectangle, and the cross section is set to a rounded rectangle, which is the best embodiment of the present application, and can also be set to other shapes that help to improve the smoothness of the water flow, but is not limited to the present application.

[0032] Referring to Figure 3 and Figure 4 , the ultrasonic transducer 2 is installed vertically to the axis of the inner tube 3. The vertical installation can maintain the flatness of the outer tube 1, reduce the remaining of the excess installation hole (compared with the inclined installation), and reduce the influence of the accumulation of impurities in the installation hole on the ultrasonic signal.

[0033] The cross section of the length direction test area of the test flow channel 32 remains unchanged and the flared part 33 is formed at both ends of the test flow channel 32, which can effectively improve the flow state of the liquid in the inner pipe 3. This design can reduce the turbulent flow phenomenon of the fluid when entering and flowing out of the test flow channel 32, thereby reducing the measurement error caused by water flow disorder, improving the measurement accuracy, and the existence of the flared part 33 can also uniformly distribute the water flow pressure, further reducing the pressure loss of the meter, making the pressure loss level better than the traditional structure, achieving a lower pressure loss level, which is beneficial to improve the overall efficiency of the water supply system, especially in the high-rise building water supply scene to ensure stable water pressure and flow. The inner wall of the inner pipe 3 has a projection hole 34 along the ultrasonic signal propagation path. The inner wall of the inner pipe 3 is provided with a mounting groove and a plug groove 37 for fixing the reflecting sheet 31. The mounting groove is located at the bottom of the waveguide groove 36 and is used for fixing the reflecting sheet 31. In the embodiment of the application, two waveguide grooves 36 are provided, and one plug groove 37 is provided. The plug groove 37 is provided on one side of the inner pipe 3 close to the projection hole 34, and the waveguide groove 36 is provided opposite to the plug groove 37, and the two waveguide grooves 36 are symmetrically distributed on both sides of the plug groove 37. The waveguide groove 36 is inclinedly provided towards the plug groove 37, so that the waveguide groove 36 faces the plug groove 37. The waveguide groove 36 and the plug groove 37 are both provided with the reflecting sheet 31. This arrangement can make the reflecting sheet 31 in the waveguide groove 36 reflect the signal of the ultrasonic transducer 2 to the reflecting sheet 31 in the plug groove 37, and finally form a "W" shaped reflection track.

[0034] The implementation principle of the embodiment is that the small-diameter ultrasonic liquid measuring device disclosed in the application sets the test flow channel 32 as S-shaped, which can reduce the test area without reducing the flow area (without increasing the pressure loss). The time difference value measured is more stable, and the error repeatability is better.

[0035] The embodiments of the specific embodiment are preferred embodiments of the utility model, which do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A small-bore ultrasonic liquid measuring device, characterized by: The utility model relates to a kind of ultrasonic testing device, including outer tube (1), ultrasonic transducer (2) and inner tube (3), the inner tube (3) is placed in outer tube (1) and is fixed, the ultrasonic transducer (2) is installed on outer tube (1), the inner tube (3) is provided with several reflecting sheet (31), the inner tube (3) is internally provided with test flow channel (32), the test flow channel (32) shape is curved and is set to S type.

2. A small-bore ultrasonic liquid measuring device according to claim 1, characterized in that: The ultrasonic transducer (2) is installed vertically to the inner tube (3) axis direction.

3. The small-bore ultrasonic liquid measuring device of claim 1, wherein: The cross section of the test flow channel (32) is rectangular.

4. A small-bore ultrasonic liquid measuring device according to claim 3, characterised in that: The rectangle is a round rectangle.

5. The small-bore ultrasonic liquid measuring device of claim 1, wherein: The cross section of the length direction test area of the test flow channel (32) remains unchanged and is formed with flared portion (33) at both ends of the test flow channel (32).

6. The small-bore ultrasonic liquid measuring device of claim 1, wherein: The S-shaped test flow channel (32) includes a single S-shaped test flow channel (32) or a combination of multiple S-shaped test flow channels (32).

7. The small-bore ultrasonic liquid measuring device of claim 1, wherein: The inner wall of the inner tube (3) has a projection hole (34) and a waveguide groove (36) along the ultrasonic signal propagation path.

8. A small-bore ultrasonic liquid measuring device according to claim 7, characterised in that: The inner wall of the inner tube (3) has a mounting groove and a slot (37) for fixing the reflecting sheet (31), and the mounting groove is located at the bottom of the waveguide groove (36).

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