CN212254210U - Measuring section structure of ultrasonic measuring device - Google Patents
Measuring section structure of ultrasonic measuring device Download PDFInfo
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- CN212254210U CN212254210U CN202021348621.6U CN202021348621U CN212254210U CN 212254210 U CN212254210 U CN 212254210U CN 202021348621 U CN202021348621 U CN 202021348621U CN 212254210 U CN212254210 U CN 212254210U
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Abstract
The utility model relates to an ultrasonic measuring device's measurement section structure for measure the ultrasonic measurement structure of flowing medium, especially liquid or gas, belong to acoustics, sensing technical field. The technical scheme is as follows: the ultrasonic measuring device is arranged in the middle of the ultrasonic measuring device, and comprises shells at two ends and a measuring section in the middle; the cross section of the inner hole of the measuring section is elliptical or elliptical-like, and an elliptical or elliptical-like flow passage is formed. The utility model has the advantages that: the technical bias in the field is overcome, and the shape of the inner hole of the measuring section is changed, and the reflector adopts the shape matched with the inner hole, so that the vortex disturbance flow interference is reduced and eliminated, and the measuring accuracy is improved.
Description
Technical Field
The utility model relates to an ultrasonic measuring device's measurement section structure for measure the ultrasonic measurement structure of flowing medium, especially liquid or gas, belong to acoustics, sensing technical field.
Background
At present, the existing ultrasonic flow sensor structure, especially the small-caliber ultrasonic flow sensor (the inner diameter is less than 40 mm), usually adopts the mode of reflecting ultrasonic waves by a reflector to measure, the reflector reflects the ultrasonic waves to penetrate through the fluid to be measured, and the time difference of forward and backward strokes is calculated so as to calculate the flow velocity information. The ultrasonic flow sensor structure of the prior art usually comprises the measuring section at the middle part and the shells at both ends, the hole of the measuring section at the middle part is a round hole, the ultrasonic flow sensor structure of the prior art usually comprises the measuring section at the middle part and the shells at both ends, the hole of the measuring section at the middle part is a circle, a circular overflowing channel is formed, the shells at both ends of the measuring section are internally provided with reflectors, the shells are provided with sensors, the two reflectors and the middle circular overflowing channel form a U-shaped measuring path, and the metering of fluid is realized. The prior art has the following problems: because the measuring section hole all is the orthocircular form, receives vortex disturbance easily, when the fluid that is surveyed receives certain disturbance, can lead to the velocity of flow center to take place the skew, for example the vortex or the velocity profile type vortex stipulated in the water gauge standard, if the ultrasonic wave route of reflector reflection does not pass fluid velocity of flow center, the distortion will take place for the measured data to arouse the measuring error of water gauge. The usual practice facing this problem is: 1. install fairing additional in water gauge upper reaches, for example straightener to make on fluid earlier stabilizes the ultrasonic measurement route at velocity of flow center before getting into the water gauge, because ultrasonic measurement device's rectification structure all need set up alone in addition, the structure is more complicated, and the processing equipment is also very loaded down with trivial details. 2. The reflector is enlarged so that the reflected ultrasonic area covers all of the measured fluid, but this greatly increases the pressure loss of the meter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultrasonic measuring device's measurement section structure through changing measurement section hole shape, and the speculum adopts the shape that matches with it, reduces and eliminates swirl vortex disturbance, improves and measures the accuracy, solves the problem that exists among the background art.
The technical scheme of the utility model is that:
a measuring section structure of an ultrasonic measuring device is arranged in the middle of the ultrasonic measuring device, and the ultrasonic measuring device comprises shells at two ends and a measuring section in the middle; the cross section of the inner hole of the measuring section is elliptical or elliptical-like, and an elliptical or elliptical-like flow passage is formed.
The shell and the measuring section are both in a cylindrical shape, and a combined structure or an integrated structure is arranged between the shell at two ends and the measuring section in the middle.
A reflector is arranged in the shell, and the shape of the reflector is matched with the ellipse or the similar ellipse of the inner hole of the measuring section; for example: rectangular mirrors, elliptical or elliptical-like mirrors, right circular shaped mirrors, etc. are used. The sensor is arranged on the shell and corresponds to the reflector in a matching mode, and the two sensors, the two reflectors and the middle elliptical or similar elliptical flow passage form a U-shaped measuring path.
Two side edges of the reflector are connected with the shell and are integrally formed with the shell.
The reflector is in an oval or rectangular shape with a long axis and a short axis, and two side edges of the reflector are connected with the shell and integrally formed with the shell; the cross section of the inner hole of the measuring section is in an ellipse or similar ellipse with a long axis and a short axis, two shells and one measuring section are combined with each other, the reflecting direction of a reflector in the shell is consistent with the central line direction of the inner hole of the measuring section, and the long axis of the reflector and the long axis of the inner hole of the measuring section are arranged in parallel.
The measuring section is a reduced part positioned between the two shells, and the sectional area of an inner hole of the measuring section is smaller than that of the inner hole of the shell; the water passing part in the measuring section is an elliptical hole or a similar ellipse, the measuring section is an independent part, and two ends of the measuring section are combined with the two shells to form an ultrasonic measuring structure; the combination mode comprises the following steps: fastening, bonding, inserting, buckling and the like.
The shell is provided with a rectifying structure and is integrally formed with the shell.
The integral molding is injection molding integral molding.
The utility model discloses a main innovation point: prior art's measurement section hole cross sectional shape is circular, the utility model discloses change measurement section hole cross sectional shape into and be oval or class oval, reduce and eliminate swirl vortex disturbance, improve and measure the accuracy.
There has been a long-standing technical prejudice in the art (ultrasonic meters): the accurate measurement can be realized only if the inner hole of the measuring section is of a perfect circle and the generated flow passage is of a perfect circle, so that the inner holes of the measuring sections of all the ultrasonic measuring instruments are of the perfect circle, and a technical bias is formed. However, in practice, it is found that the flow passage formed by the inner hole of the right circular measuring section can generate vortex disturbance, and the measurement accuracy is influenced. According to the principle of rotational flow, in the flow passage formed by the inner hole of the circular measuring section, because the circular flow passage is circumferentially symmetrical, vortex disturbance can freely develop and diffuse in the circular flow passage, because the flow disturbing piece is arranged at the upstream of the measuring section, secondary flow superposed on the axial main flow can be generated, and the secondary flow flows perpendicular to the axial flow, so that the metering of the ultrasonic instrument can be influenced. The overflowing channel formed by the oval or quasi-oval hole of the utility model is in a non-circular symmetrical shape, and the vortex disturbance can be inhibited by the circumference of the oval or quasi-oval overflowing channel; the oval or quasi-oval flow passage compresses the height of the flow passage under the condition of the same flow area, so that secondary flow is inhibited, and the flow can be recovered to the main flow direction more quickly than that of a perfect circle flow passage.
The utility model has the advantages that: the technical bias in the field is overcome, and the shape of the inner hole of the measuring section is changed, and the reflector adopts the shape matched with the inner hole, so that the vortex disturbance flow interference is reduced and eliminated, and the measuring accuracy is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic sectional view of an embodiment of the present invention;
FIG. 3 is a schematic view of a reflector according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a reduced portion of an embodiment of the present invention;
FIG. 5 is a schematic view of the inner hole corresponding relationship between the reflector and the reduced portion of the embodiment of the present invention;
FIG. 6 is a flow diagram of a flow passage in a prior art measurement section;
FIG. 7 is a flow chart of the flow passage in the measuring section of the present invention;
FIG. 8 is a comparison of an elliptical hole measuring section of the present invention and a circular hole measuring section of the prior art;
in the figure: the device comprises a first rectifying structure 1, a first shell 2, a first sensor mounting hole 3, a measuring section 4, a second shell 5, a second sensor mounting hole 6, a second sensor mounting hole 7, a second reflector 8, an inner hole 9 and a first reflector 10.
Detailed Description
The present invention will be further explained by way of examples with reference to the accompanying drawings.
A measuring section structure of an ultrasonic measuring device is arranged in the middle of the ultrasonic measuring device, and the ultrasonic measuring device comprises shells at two ends and a measuring section 4 in the middle; the cross section of the inner hole 9 of the measuring section is elliptical or elliptical-like, and an elliptical or elliptical-like flow passage is formed.
The shell and the measuring section are both in a cylindrical shape, and a combined structure or an integrated structure is arranged between the shell at two ends and the measuring section in the middle.
A reflector is arranged in the shell, and the shape of the reflector is matched with the ellipse or the similar ellipse of the inner hole of the measuring section; rectangular mirrors, elliptical or elliptical-like mirrors, right circular shaped mirrors, etc. are used. The sensor is arranged on the shell and corresponds to the reflector in a matching mode, and the two sensors, the two reflectors and the middle elliptical or similar elliptical flow passage form a U-shaped measuring path.
Two side edges of the reflector are connected with the shell and are integrally formed with the shell.
The reflector is in an oval or rectangular shape with a long axis and a short axis, and two side edges of the reflector are connected with the shell and integrally formed with the shell; the cross section of the inner hole of the measuring section is in an ellipse or similar ellipse with a long axis and a short axis, two shells and one measuring section are combined with each other, the reflecting direction of a reflector in the shell is consistent with the central line direction of the inner hole of the measuring section, and the long axis of the reflector and the long axis of the inner hole of the measuring section are arranged in parallel.
The measuring section is a reduced part positioned between the two shells, and the sectional area of an inner hole of the measuring section is smaller than that of the inner hole of the shell; the water passing part in the measuring section is an elliptical hole or a similar ellipse, the measuring section is an independent part, and two ends of the measuring section are combined with the two shells to form an ultrasonic measuring structure; the combination mode comprises the following steps: fastening, bonding, inserting, buckling and the like.
The shell is provided with a rectifying structure and is integrally formed with the shell.
The integral molding is injection molding integral molding.
The utility model discloses a working process: the cross section of an inner hole of a measuring section in the middle of the ultrasonic measuring device is elliptical or similar to elliptical, so that an elliptical or similar elliptical flow passage is formed; the shape of a reflector of the ultrasonic measuring device is consistent with the ellipse or the similar ellipse of the inner hole of the measuring section; the reflector is in an oval or rectangular shape with a long axis and a short axis, and two side edges of the reflector are connected with the shell and integrally formed with the shell; the cross section of the inner hole of the measuring section is in an ellipse or similar ellipse with a long axis and a short axis, two shells and one measuring section are combined together, the reflecting direction of a reflector in the shell is consistent with the central line direction of the inner hole of the measuring section, and the long axis of the reflector and the long axis of the inner hole of the measuring section are arranged in parallel; the sensor is arranged on the shell, the sensor is matched and corresponds to the reflectors, and the two sensors, the two reflectors and the middle elliptical or similar elliptical flow passage form a U-shaped measuring path to realize fluid measurement.
The casing is provided with a rectifying structure, the rectifying structure comprises a notch 1 and a convex edge 7, the notch 1 is arranged at the end part of the casing, the convex edge 7 is longitudinally arranged on the inner wall of the end part of the casing, the notch 1 and the convex edge 7 are arranged in a staggered manner on the circumference of the end part of the casing, and the casing, the notch 1 and the convex edge 7 are integrally formed; the shape of the notch is arbitrary, and comprises a strip-shaped groove, a U-shaped groove, a V-shaped opening, a semicircular opening and the like. The quantity of notch is arbitrary, and a plurality of notches all set up the tip at the casing, and the shape of a plurality of notches can be the same, also can be different. The cross-sectional shape of the convex edge is arbitrary, including rectangular, square, trapezoidal, semicircular, and the like. Protruding stupefied and casing integrated into one piece, protruding stupefied quantity is arbitrary, and a plurality of protruding stupefied all sets up on the tip inner wall of casing, and a plurality of protruding stupefied shapes can be the same, also can be different.
In the embodiment, the number of the shells is two, namely a shell I2 and a shell II 5; the number of the rectification structures is two, and the rectification structures are a rectification structure I and a rectification structure II respectively; the number of the reflectors is two, namely a reflector I10 and a reflector II 8; the first shell 2 is provided with a sensor mounting hole 3, a first rectifying structure and a first reflector 10, and the second shell 5 is provided with a sensor mounting hole 6, a second rectifying structure and a second reflector 8.
The cross section of the inner hole 9 of the measuring section is elliptical or elliptical-like, and an elliptical or elliptical-like flow passage is formed. The reflector is arranged in the shell, the shape of the reflector is consistent with that of an ellipse or a similar ellipse of an inner hole of the measuring section, and the ellipse or the similar ellipse reflector is adopted.
Through the experiment contrast, verified the utility model discloses a technological effect.
Will the utility model discloses measure the section hole and install in the body of measuring the pipeline section for the sensor of elliptical aperture, compare for the sensor in positive circular hole with prior art's measurement section hole. The following flow verification is carried out through the flow verification standard device test: 10L/h, 16L/h, 25L/h, 32L/h, 50L/h, 80L/h, 120L/h, 160L/h, 320L/h, 450L/h, 880L/h, 1300L/h, 2000L/h, 2500L/h and 4000L/h, and the original flow error trend is obtained, and specific test data are shown in the attached figure 8.
FIG. 8 is a comparison of an elliptical hole measuring section of the present invention and a circular hole measuring section of the prior art; the original flow error curve before correction needs polynomial fitting on the curve, so that the linearity of the curve corresponding to the elliptical hole measuring section is superior to that of the circular hole measuring section in the prior art, and the accuracy is higher than that of the circular hole measuring section after fitting correction.
Will the utility model discloses measure the section hole and install in the body of measuring the pipeline section for the sensor of elliptical aperture, compare for the sensor in positive circular hole with prior art's measurement section hole. The flow is set to 4m through the test of a flow verification standard device3The different straight tube section distances in front of the table, like 10D, 5D, 3D, 0D, D is the pipe diameter, sets up the swirl vortex or the speed profile type vortex of regulation in the water gauge standard, tests the utility model discloses with prior art anti-vortex ability. Specific test data are shown in the following table:
through test data show, the utility model discloses an elliptical aperture measures section anti-turbulence performance and is superior to prior art's positive round hole, still can reach 1 level required precision after the disturbance test, and prior art's positive round hole can only reach 2 level required precision.
The utility model overcomes technical bias in the field has novel structure, low pressure loss, assembly process convenience, anti-interference flow function reinforce to and advantages such as measurement accuracy height.
Claims (4)
1. The utility model provides an ultrasonic measuring device's measurement section structure which characterized in that: the ultrasonic measuring device is arranged in the middle of the ultrasonic measuring device, and comprises shells at two ends and a measuring section in the middle; the cross section of the inner hole of the measuring section is elliptical or elliptical-like, and an elliptical or elliptical-like flow passage is formed.
2. The measurement section structure of an ultrasonic measurement apparatus according to claim 1, wherein: the shell and the measuring section are both in a cylindrical shape, and a combined structure or an integrated structure is arranged between the shell at two ends and the measuring section at the middle part.
3. The measurement section structure of an ultrasonic measurement apparatus according to claim 1 or 2, wherein: a reflector is arranged in the shell, and the shape of the reflector is matched with the ellipse or the similar ellipse of the inner hole of the measuring section; the sensor is arranged on the shell and corresponds to the reflector in a matching mode, and the two sensors, the two reflectors and the middle elliptical or similar elliptical flow passage form a U-shaped measuring path.
4. The measurement section structure of an ultrasonic measurement apparatus according to claim 3, wherein: the reflector is in an oval or rectangular shape with a long axis and a short axis, and two side edges of the reflector are connected with the shell and integrally formed with the shell; the cross section of the inner hole of the measuring section is in an ellipse or similar ellipse with a long axis and a short axis, two shells and one measuring section are combined with each other, the reflecting direction of a reflector in the shell is consistent with the central line direction of the inner hole of the measuring section, and the long axis of the reflector and the long axis of the inner hole of the measuring section are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348621.6U CN212254210U (en) | 2020-07-10 | 2020-07-10 | Measuring section structure of ultrasonic measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348621.6U CN212254210U (en) | 2020-07-10 | 2020-07-10 | Measuring section structure of ultrasonic measuring device |
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| Publication Number | Publication Date |
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| CN212254210U true CN212254210U (en) | 2020-12-29 |
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| CN202021348621.6U Active CN212254210U (en) | 2020-07-10 | 2020-07-10 | Measuring section structure of ultrasonic measuring device |
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| CN (1) | CN212254210U (en) |
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