CN205449178U - Ultrasonic water meter - Google Patents
Ultrasonic water meter Download PDFInfo
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- CN205449178U CN205449178U CN201521100731.XU CN201521100731U CN205449178U CN 205449178 U CN205449178 U CN 205449178U CN 201521100731 U CN201521100731 U CN 201521100731U CN 205449178 U CN205449178 U CN 205449178U
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Abstract
The utility model provides an ultrasonic water meter. Ultrasonic water meter includes: water inlet and delivery port that first body, first body have the flow path pipeline and be linked together with the flow path pipeline respectively, ultrasonic wave metering device, ultrasonic wave metering device include two ultrasonic transceiver, and two ultrasonic transceiver set up on first body and the setting of the axial interval of longshore current way pipeline, two reflection element set up in the inside of flow path pipeline, and wherein, two reflection element and two ultrasonic transceiver one -to -ones set up, the propagation path of ultrasonic wave between two reflection element and the parallel perhaps coincidence of the the central axis of flow path pipeline of an ultrasonic transceiver transmission, the display module sets up on the outer wall of first body, controller, ultrasonic wave metering device and display module are connected with the controller electricity respectively, and the controller is received the signal of ultrasonic wave metering device transmission and will be measured the result and shows on the display module. The utility model discloses an ultrasonic water meter's measurement accuracy is higher.
Description
Technical field
This utility model relates to flow measurement field, in particular to a kind of ultrasonic water meter.
Background technology
For saving heating cost and reducing energy consumption, in the winter heating system pipe network of Northern Part of China, current are generally of that water quality is low and the feature of high-temperature excursion.Measure for hot water flow in heating pipe network, use the vane-wheel type flowmeter of prior art to be typically due to water quality relatively low and containing the factor such as impurity, easily cause pipe network blocking.Additionally, due to water temperature excursion is relatively big, temperature is not easy to eliminate to the impact that flow measurement brings, and the crushing of vane-wheel type flowmeter self is relatively big in addition, is unfavorable for saving energy and reduce the cost.To this end, ultrasonic water meter based on ultrasonic flow rate measuring principle is just becoming the development trend that in heating system pipe network, hot water flow is measured.
Ultrasonic water meter is little owing to having crushing, not by measuring water quality impact, precision advantages of higher, is becoming focus new in heating network hot water flow table research and development field.Its ultimate principle is to launch ultrasound wave to fluids within pipes by being arranged on the ultrasonic transmitter-receiver of pipeline upstream and downstream both sides, owing to the modulating action of fluid can calculate ultrasound wave downstream propagation and the time difference of adverse current propagation, obtain the flow rate information in pipeline and and then calculate flow.
In prior art, ultrasonic water meter generally uses W type propagation path, in aforesaid way, there is the angle less than 90 ° between ultrasound wave propagation path and the central axis of flowpath conduit in flowpath conduit.
In use, granule tiny in fluid, dust, dust etc. stick to the position of reflectance ultrasound ripple on flowpath conduit wall, the reflection path of ultrasound wave more can be made to change, the small part even ultrasound wave of major part can not reflex to the range of receiving of receptor and can not be received, thus have impact on certainty of measurement, reduce the accuracy of measurement.
And when using W type propagation path, owing to ultrasound wave will be through the reflection more than once in flowpath conduit, also the ultrasound wave having major part can not be received beyond the range of receiving of receptor after reflection, also have impact on certainty of measurement, reduces the accuracy of measurement.In a word, the certainty of measurement of above-mentioned ultrasonic water meter is relatively low.
Utility model content
Main purpose of the present utility model is to provide a kind of ultrasonic water meter, and the certainty of measurement of this ultrasonic water meter is higher.
To achieve these goals, this utility model provides a kind of ultrasonic water meter, and ultrasonic water meter includes: the first body, and the first body has flowpath conduit and the water inlet being connected respectively and outlet with flowpath conduit；Supersonic wave metering device, supersonic wave metering device includes two ultrasonic transmitter-receivers, and two ultrasonic transmitter-receivers are arranged on the first body and arrange along the axially spaced-apart of flowpath conduit；Two reflecting elements, it is arranged on the inside of flowpath conduit, wherein, two reflecting elements and two ultrasonic transmitter-receiver one_to_one corresponding are arranged, the centerline axis parallel of the ultrasound wave that ultrasonic transmitter-receiver is launched propagation path between two reflecting elements and flowpath conduit or overlap；Display module, is arranged on the outer wall of the first body；Controller, supersonic wave metering device and display module are electrically connected with the controller respectively, and controller receives the signal of supersonic wave metering device transmission and shown on display module by metric results.
Further, the ultrasound wave of a ultrasonic transmitter-receiver transmitting is received so that ultrasound wave forms N-type propagation path in flowpath conduit by another ultrasonic transmitter-receiver respectively after two reflecting elements reflections.
Further, two ultrasonic transmitter-receivers shift to install in the axial direction of flowpath conduit, and two ultrasonic transmitter-receivers are in the circumferentially-spaced setting of flowpath conduit.
Further, two ultrasonic transmitter-receivers are 180 ° relative to the central axis of flowpath conduit and are symmetrical arranged.
Further, two reflecting elements shift to install in the axial direction of flowpath conduit, and two reflecting elements are in the circumferentially-spaced setting of flowpath conduit.
Further, there is between ultrasound wave and the reflecting surface of a reflecting element of a ultrasonic transmitter-receiver transmitting the first incident angle α, there is between ultrasound wave and the reflecting surface of another reflecting element that another ultrasonic transmitter-receiver receives the second incident angle β.
Further, the first incident angle α and the second incident angle β are 45 °.
Further, flowpath conduit includes the first pipeline section and is correspondingly arranged at two second pipeline sections at the first pipeline section two ends respectively, and wherein, the internal diameter of the first pipeline section is less than the internal diameter of the second pipeline section, and two reflecting elements are correspondingly arranged at two the second inner tube segment respectively.
Further, reflecting element includes reflecting surface and the turbulent portion being connected with reflecting surface.
Further, ultrasonic water meter also includes two the first installation through holes being arranged on the tube wall of flowpath conduit, and first installs through hole connects with the inside of flowpath conduit, installs through hole for two first and arranges with two ultrasonic transmitter-receiver one_to_one corresponding respectively.
Further, ultrasonic water meter also includes two the second installation through holes being arranged on the tube wall of flowpath conduit, and second installs through hole connects with the inside of flowpath conduit, and two reflecting elements are correspondingly arranged at two second inside installing through hole respectively.
Further, supersonic wave metering device also includes: propagation time metering unit, the ultrasonic propagation time between two ultrasonic transmitter-receivers of metering；Flow rate calculation parts, calculate the flow of fluid to be batched according to the signal of propagation time metering unit transmission.
Further, ultrasonic water meter also includes: the second body, and the second body is obliquely installed relative to the first body；Temperature sensor, temperature sensor is arranged on the interior temperature treating fluid measured with test of the second body.
Application the technical solution of the utility model, the centerline axis parallel of the ultrasound wave launched due to ultrasonic transmitter-receiver propagation path between two reflecting elements and flowpath conduit or overlap, make the flow field change in flowpath conduit more smooth and easy, be conducive to obtaining Flow Field Distribution more smoothly, thus improve the certainty of measurement of ultrasonic water meter.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the perspective view of the embodiment according to ultrasonic water meter of the present utility model；
Fig. 2 shows the structural representation of the embodiment according to ultrasonic water meter of the present utility model；
Fig. 3 a shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 0.05m3The velocity contour of the fluid being positioned at during/h on flowpath conduit central axis；
Fig. 3 b shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 2.5m3The velocity contour of the fluid being positioned at during/h on flowpath conduit central axis；
Fig. 4 a shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 0.05m3Flow Field Distribution schematic diagram on the longitudinal section in one direction during/h；
Fig. 4 b shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 0.05m3Flow Field Distribution schematic diagram on the longitudinal section in another direction during/h；
Fig. 5 a shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 2.5m3Flow Field Distribution schematic diagram on the longitudinal section in one direction during/h；
Fig. 5 b shows that the fluid flow to be measured of the ultrasonic water meter of Fig. 2 is 2.5m3Flow Field Distribution schematic diagram on the longitudinal section in another direction during/h；And
Fig. 6 shows the measurement result and the schematic diagram of precision that the ultrasonic water meter of Fig. 2 measures under the conditions of different flow scope and variations in temperature.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
1, flowpath conduit；10, the first body；11, the first pipeline section；12, the second pipeline section；13, water inlet；14, outlet；15, first through hole is installed；16, second through hole is installed；17, locating dowel；20, the second body；2, ultrasonic transmitter-receiver；3, reflecting element；31, reflecting surface；32, turbulent flow portion.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In this utility model and embodiment of the present utility model, fluid flows shown in Fig. 2 from left to right.
As depicted in figs. 1 and 2, this utility model provides a kind of ultrasonic water meter.Ultrasonic water meter includes the first body 10, is arranged on the supersonic wave metering device within the first body 10, the display module being arranged on the outer wall of the first body 10 and controller.
Wherein, supersonic wave metering device and display module are electrically connected with the controller respectively, and controller receives the signal of supersonic wave metering device transmission and shown on display module by metric results；First body 10 has flowpath conduit 1 and the water inlet 13 being connected respectively and outlet 14 with flowpath conduit 1.
Supersonic wave metering device includes two ultrasonic transmitter-receivers 2 that two ultrasonic transmitter-receivers 2, axially spaced-apart along flowpath conduit 1 are arranged and two reflecting elements 3 of inside being arranged on flowpath conduit 1.Wherein, two ultrasonic transmitter-receivers 2 are arranged on flowpath conduit 1 inside, two reflecting elements 3 and two ultrasonic transmitter-receiver 2 one_to_one corresponding are arranged, the central axes of the ultrasound wave that ultrasonic transmitter-receiver 2 is launched propagation path between two reflecting elements 3 and flowpath conduit 1.
By above-mentioned setting, the central axes of the ultrasound wave launched due to ultrasonic transmitter-receiver 2 propagation path between two reflecting elements 3 and flowpath conduit 1, make the flow field change in flowpath conduit 1 more smooth and easy, be conducive to obtaining Flow Field Distribution more smoothly, and the flow velocity of the fluid being positioned on centrage is maximum, corresponding suitable, countercurrently time difference the most maximum, and time difference is the biggest more is conducive to measuring, thus improve the certainty of measurement of supersonic wave metering device, and then improve the certainty of measurement of ultrasonic water meter and the accuracy of measurement.
Further, variable can show on display module, it is simple to operator observe, and above-mentioned ultrasonic water meter compact conformation.
As in figure 2 it is shown, two ultrasonic transmitter-receivers 2 shift to install in the axial direction of flowpath conduit 1, and two ultrasonic transmitter-receivers 2 are in the circumferentially-spaced setting of flowpath conduit 1.Two reflecting elements 3 shift to install in the axial direction of flowpath conduit 1, and two reflecting elements 3 are in the circumferentially-spaced setting of flowpath conduit 1.
Preferably, two ultrasonic transmitter-receivers 2 are 180 ° relative to the central axis of flowpath conduit 1 and are symmetrical arranged, and i.e. two ultrasonic transmitter-receivers 2 are respectively arranged at the both sides of flowpath conduit 1 upstream and downstream；Two reflecting elements 3 are 180 ° relative to the central axis of flowpath conduit 1 and are symmetrical arranged and two reflecting elements 3 are correspondingly arranged at the opposite side of two ultrasonic transmitter-receivers 2 respectively.
The ultrasound wave of one ultrasonic transmitter-receiver 2 transmitting is received so that ultrasound wave forms N-type propagation path in flowpath conduit 1 by another ultrasonic transmitter-receiver 2 respectively after two reflecting elements 3 reflections.
By above-mentioned setting, it is symmetrical arranged owing to two reflecting elements 3 are 180 ° relative to the central axis of flowpath conduit 1, so that the change of flowpath conduit 1 flow field is more smooth and easy, be conducive to the pipeline between two reflecting elements 3 obtains more stable Flow Field Distribution, be conducive to measuring, improve certainty of measurement, and be not easily blocked.
Specifically, the sound channel reflection with N-type propagation path of the present embodiment is conducive to the flow field symmetry relative to the central axis of flowpath conduit 1, so the flow field being positioned on flowpath conduit 1 central axis is more steady.Embodiment of the present utility model avoids traditional U-shaped reflex channel and makes flow field that the phenomenon of skew occur to flowpath conduit 1 side.
Specifically, N-type propagation path is made up of three sections of sound paths L1, L2 and L3.Wherein, L1=L3=10mm, L2=72mm.Wherein, L1 is the ultrasonic propagation that sends of one of them ultrasonic transmitter-receiver 2 to the distance between the reflecting surface of reflecting element 3；L2 is that ultrasound wave is propagated to the propagation distance of another reflecting element 3 by a reflecting element 3；L3 is that ultrasound wave is propagated to the distance of another ultrasonic transmitter-receiver 2 by the reflecting surface of reflecting element 3.
As shown in Figure 2, in embodiment of the present utility model, there is between ultrasound wave and the reflecting surface of a reflecting element 3 of one ultrasonic transmitter-receiver 2 transmitting the first incident angle α, there is between ultrasound wave and the reflecting surface of another reflecting element 3 that another ultrasonic transmitter-receiver 2 receives second incident angle β.
Specifically, the first incident angle α and the second incident angle β are 45 °.
By above-mentioned setting, the central axes of the ultrasound wave propagation path between two reflecting elements 3 that ultrasonic transmitter-receiver 2 is launched and flowpath conduit 1, owing to the flow field on central axis is more steady, flow velocity on central axis is maximum, so the time difference under the conditions of the concurrent-countercurrent of correspondence is the most maximum, time difference is the biggest more is conducive to measuring.
As shown in Figure 2, in embodiment of the present utility model, flowpath conduit 1 includes the first pipeline section 11 and is correspondingly arranged at two second pipeline sections 12 at the first pipeline section 11 two ends respectively, wherein, the internal diameter of the first pipeline section 11 is correspondingly arranged at two the second pipeline sections 12 inside respectively less than the internal diameter of the second pipeline section 12, two reflecting elements 3.
By above-mentioned setting, flow path pipeline 1 carries out undergauge design, can improve the certainty of measurement of ultrasonic water meter.
Specifically, the internal diameter D1 of the first pipeline section 11 can be set to 20mm, the internal diameter D2 of the second pipeline section 12 is set to 14mm.Seriality characteristic (conservation of mass characteristic) when flowing in flowpath conduit 1 according to fluid, flowpath conduit 1 cross section after undergauge reduces, fluid circulate the second pipeline section 12 cross section mean flow rate will increase, rate of flow of fluid on L2 path also will increase, under the conditions of same traffic, after undergauge, time difference between concurrent-countercurrent ultrasonic propagation signal will increase, and be conducive to improving certainty of measurement.
Same, it is also possible to this N-type propagation path is applied in the design of other Large Diameter Pipeline transit time ultrasonic ripple water meters.
As in figure 2 it is shown, in embodiment of the present utility model, reflecting element 3 includes reflecting surface 31 and the turbulent portion 32 being connected with reflecting surface 31.
Wherein, turbulent flow portion 32 is hemisphere.Turbulent flow portion 32 is set to hemisphere and acts primarily as guide functions, allow fluid flow through during this part body more smooth, beneficially steady flow condition and the reduction pressure loss.
As shown in Figure 1, in embodiment of the present utility model, ultrasonic water meter also includes two the first installation through holes 15 being arranged on flowpath conduit 1, and first installs through hole 15 connects with the inside of flowpath conduit 1, installs through hole 15 for two first and arranges with two ultrasonic transmitter-receiver 2 one_to_one corresponding respectively.
As it is shown in figure 1, ultrasonic water meter also includes two the second installation through holes 16 being arranged on flowpath conduit 1, second installs through hole 16 connects with the inside of flowpath conduit 1, and two reflecting elements 3 are correspondingly arranged at two second inside installing through hole 16 respectively.
Internal by ultrasonic transmitter-receiver 2 is arranged on the first installation through hole 15, it is internal that reflecting element 3 is arranged on the second installation through hole 16, and the structure that can make whole ultrasonic water meter is compacter, small volume.
Specifically, the first installation through hole 15 and the second installation through hole 16 are each perpendicular to the first body 10 and arrange.And first install through hole 15 and install through hole 16 all inside with the first body 10 with second and connect.
As it is shown in figure 1, ultrasonic water meter also includes the locating dowel 17 being arranged on the first body 10 outer wall.Specifically, locating dowel 17 is two.Display module and controller are integrated into a modular overall structure, and this overall structure is supported on the first body 10 by locating dowel 17.
As it is shown in figure 1, ultrasonic water meter also includes the second body 20 and temperature sensor.Second body 20 is obliquely installed relative to the first body 10；Temperature sensor is arranged on the second interior temperature treating fluid measured with test of body 20.
Supersonic wave metering device of the present utility model also includes propagation time metering unit and flow rate calculation parts.Propagation time metering unit ultrasonic propagation time between two ultrasonic transmitter-receivers of metering；Flow rate calculation parts calculate the flow of fluid to be batched according to the signal that propagation time metering unit transmits.
Fig. 3 a shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 0.05m3The velocity contour of the fluid being positioned at during/h on flowpath conduit central axis；Fig. 3 b shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 2.5m3The velocity contour of the fluid being positioned at during/h on flowpath conduit central axis.
In Fig. 3 a and Fig. 3 b, abscissa all represents effective diverse location corresponding for sound path L2 of ultrasonic propagation, and vertical coordinate is flow velocity.By comparison diagram 3a and Fig. 3 b it is found that along with the increase of fluid flow, the VELOCITY DISTRIBUTION change on effective sound path L2 of N-type propagation path is more smooth.
The rate of flow of fluid obtained due to the ultrasound wave downstream propagation (propagating along path L1, L2 and L3 the most successively) launched according to ultrasonic transmitter-receiver 2 and the time difference countercurrently propagated is the fluid mean flow rate on ultrasonic wave propagation path, fluid mean flow rate on ultrasonic wave propagation path need to be modified to the fluid mean flow rate on flowpath conduit 1 cross section for fluid flow in obtaining flowpath conduit further, ultrasonic wave propagation path upper fluid VELOCITY DISTRIBUTION is the most smooth will more contribute to the correction of pipeline section upper fluid mean flow rate.
Fig. 4 a shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 0.05m3Flow Field Distribution schematic diagram on the longitudinal section in one direction during/h；Fig. 4 b shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 0.05m3Flow Field Distribution schematic diagram on the longitudinal section in another direction during/h.
In fig .4, abscissa represents effective diverse location corresponding for sound path L2 of ultrasonic propagation, and vertical coordinate represents the diverse location of flowpath conduit horizontal profile；In fig. 4b, abscissa represents effective diverse location corresponding for sound path L2 of ultrasonic propagation, and vertical coordinate represents the diverse location of flowpath conduit vertical section.In figs. 4 a and 4b, different colours all represents different flow velocitys.
As shown in fig. 4 a, specifically, X represent flowpath conduit 1 central axis place horizontal plane in diverse location corresponding to fluid.When treating that fluid measured is with 0.05m3After the flow of/h is by above-mentioned ultrasonic water meter, the flow velocity of the fluid in horizontal plane between two reflecting elements 3 is relatively big, flow field is relatively steady, and specifically, flow velocity is more than or equal to 0.08m/s and less than or equal to 0.12m/s；And the flow velocity of the fluid of reflecting element 3 upstream on the left of being positioned at is less, flow velocity is less than or equal to 0.08m/s, and similarly, the flow velocity of the fluid being positioned at the downstream of the reflecting element 3 on right side is the least, and flow velocity is less than 0.08m/s.
As shown in Figure 4 b, specifically, X represent flowpath conduit 1 central axis place perpendicular in diverse location corresponding to fluid.When treating that fluid measured is with 0.05m3After the flow of/h is by above-mentioned ultrasonic water meter, as 0.24m≤X≤0.28m, the flow velocity of the fluid in perpendicular between two reflecting elements 3 is relatively big, flow field is relatively steady, and flow velocity is more than or equal to 0.1m/s and less than or equal to 0.12m/s；The flow velocity of the fluid being positioned at reflecting element 3 upstream, left side is less, and flow field change is relatively big, and flow velocity changes in the range of [-0.04,0.08]；Similarly, the flow velocity of the fluid being positioned at the downstream of right side reflecting element 3 is the least, and flow velocity is respectively less than 0.08m/s.
In like manner, Fig. 5 a shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 2.5m3Flow Field Distribution schematic diagram on the longitudinal section in one direction during/h；Fig. 5 b shows that the fluid flow to be measured according to ultrasonic water meter of the present utility model is 2.5m3Flow Field Distribution schematic diagram on the longitudinal section in another direction during/h.
In figs. 5 a and 5b, abscissa all represents effective diverse location corresponding for sound path L2 of ultrasonic propagation；Difference is, in fig 5 a, vertical coordinate represents the diverse location of flowpath conduit horizontal profile, and in figure 5b, vertical coordinate represents the diverse location of flowpath conduit vertical section.In figs. 5 a and 5b, different colours all represents different flow velocitys.
As shown in Figure 5 a, specifically, X represent flowpath conduit 1 central axis place horizontal plane in diverse location corresponding to fluid.When treating that fluid measured is with 2.5m3After the flow of/h is by above-mentioned ultrasonic water meter, the flow velocity of the fluid in horizontal plane between two reflecting elements 3 is relatively big, flow field is more steady.Specifically, as 0.235m≤X≤0.28m, the flow velocity of the fluid in horizontal plane between two reflecting elements 3 is more than or equal to 5m/s and less than or equal to 6m/s, and flow field is more steady；And the flow velocity less (flow velocity is less than or equal to 4m/s) being positioned at the fluid of reflecting element 3 upstream in left side, flow field change is bigger；Similarly, the flow velocity of the fluid being positioned at the downstream of the reflecting element 3 on right side is the least (flow velocity is less than or equal to 4m/s).
As shown in Figure 5 b, specifically, X represent flowpath conduit 1 central axis place perpendicular in diverse location corresponding to fluid.When treating that fluid measured is with 2.5m3After the flow of/h is by above-mentioned ultrasonic water meter, the flow velocity of the fluid in perpendicular between two reflecting elements 3 is relatively big, flow field is more steady.Specifically, as 0.235m≤X≤0.285m, the flow velocity of the fluid in perpendicular between two reflecting elements 3 is more than or equal to 4m/s and less than or equal to 6m/s, and flow field is more steady；And the flow velocity less (flow velocity is less than 4m/s) being positioned at the fluid of reflecting element 3 upstream in left side, flow field change is bigger；Similarly, the flow velocity of the fluid being positioned at the downstream of the reflecting element 3 on right side is the least (flow velocity is less than or equal to 4m/s), and flow field change is bigger.
By comparison diagram 4a and Fig. 5 a or comparison diagram 4b and Fig. 5 b it is found that near reflecting element 3, the flow field in flowpath conduit 1 is due to the existence generation acute variation of reflecting element 3, but the flow field change degree near downstream reflecting element 3 is less than upstream region.Use the ultrasonic water meter with this N-type propagation path, from structure, accomplished that the reflecting element 3 laying respectively at upstream and downstream becomes 180 degree of symmetries relative to the central axis of flowpath conduit 1, be conducive to obtaining more stable Flow Field Distribution thus improve certainty of measurement.
Fig. 6 shows the schematic diagram of measurement result and the precision measured under the conditions of different flow scope and variations in temperature according to ultrasonic water meter of the present utility model.In figure, dotted line is the flow error upper limit and the lower limit that ultrasonic water meter reaches that 2 class precisions (2%) should meet.
It is found that work as and treat that the flow of fluid measured is positioned at 0.025m from Fig. 63/ h～2.5m3Between/h, and temperature is when being respectively 25 DEG C, 38 DEG C, 50 DEG C, 60 DEG C and 80 DEG C, the certainty of measurement utilizing this ultrasonic water meter to measure can reach 2 class precision standards, and therefore this ultrasonic water meter has preferable certainty of measurement, and can adapt to bigger temperature of fluid medium excursion.
Table 1 to table 3 is the ultrasonic water meter of ultrasonic water meter of the present utility model and prior art test result at a temperature of different flow scope and different fluid.
The ultrasonic water meter of the ultrasonic water meter and prior art that are utilized respectively the present embodiment during table 1 water temperature 21 DEG C carries out the test result tested
The ultrasonic water meter of the ultrasonic water meter and prior art that are utilized respectively the present embodiment during table 2 water temperature 50 DEG C carries out the test result tested
The ultrasonic water meter of the ultrasonic water meter and prior art that are utilized respectively the present embodiment during table 3 water temperature 50 DEG C carries out the test result tested
Table 1 shows that fluid flow to be measured is respectively 0.05m when treating that measurement of discharge water temperature is 21 DEG C3/h、0.25m3/ h and 2.5m3During/h, the ultrasonic water meter of the present embodiment and the ultrasonic water meter of prior art is utilized to carry out the test result tested.
As shown in table 1, under identical water temperature, when fluid measured is respectively at different flows, utilize the meansigma methods of the absolute relative error that the ultrasonic water meter convection cell of the present embodiment measures to be respectively less than 2%, reach 2 class precision requirements.
The certainty of measurement (i.e. relative error magnitudes) utilizing the ultrasonic water meter convection cell of prior art to measure is the biggest, when fluid flow to be measured is 2.5m3During/h, certainty of measurement is 2.22%；When fluid flow to be measured is 0.25m3/ h, certainty of measurement is 2.6%；When fluid flow to be measured is 0.05m3/ h, certainty of measurement is 5.72%.
Table 2 shows that fluid flow to be measured is respectively 0.05m when treating that measurement of discharge water temperature is 50 DEG C3/h、0.25m3/ h and 2.5m3During/h, the ultrasonic water meter of the present embodiment and the ultrasonic water meter of prior art is utilized to carry out the test result tested.
As shown in table 2, when the water temperature of fluid to be measured is 50 DEG C, when fluid flow to be measured is respectively 0.05m3/h、0.25m3/ h and 2.5m3During/h, compared with prior art, the meansigma methods utilizing the certainty of measurement that the ultrasonic water meter convection cell of the present embodiment measures all increases.
Table 3 shows that fluid flow to be measured is respectively 0.03m when treating that measurement of discharge water temperature is 50 DEG C3/h、0.15m3/ h and 1.5m3During/h, the ultrasonic water meter of the ultrasonic water meter and prior art that are utilized respectively the present embodiment carries out the test result tested.
By contrast table 1, table 2 and table 3 it is found that ultrasonic water meter of the present utility model convection cell well adapting to property of variations in temperature under conditions of guarantee precision is up to standard, ultrasonic water meter of the present utility model has more superior overall performance.
Owing to the certainty of measurement relatively prior art of ultrasonic water meter increases, so including that the certainty of measurement of ultrasonic water meter is the highest.
From above description, can be seen that, this utility model the above embodiments achieve following technique effect: two ultrasonic transmitter-receivers are 180 ° relative to the central axis of flowpath conduit and are symmetrical arranged, and i.e. two ultrasonic transmitter-receivers are respectively placed in the both sides of flowpath conduit upstream and downstream；Two reflecting elements are 180 ° relative to the central axis of flowpath conduit 1 and are symmetrical arranged and two reflecting elements are correspondingly arranged at the opposite side of two ultrasonic transmitter-receivers respectively, and the ultrasound wave that ultrasonic transmitter-receiver is launched is received so that ultrasound wave forms N-type propagation path in flowpath conduit by another ultrasonic transmitter-receiver respectively after two reflecting elements reflections；By above-mentioned setting, it is symmetrical arranged owing to two reflecting elements are 180 ° relative to the central axis of flowpath conduit, so that the change of flowpath conduit flow field is more smooth and easy, be conducive to the pipeline between two reflection subassemblies obtains more stable Flow Field Distribution, be conducive to measuring, improve certainty of measurement, and be not easily blocked.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (13)
1. a ultrasonic water meter, it is characterised in that described ultrasonic water meter includes:
First body (10), described first body (10) has flowpath conduit (1) and the water inlet (13) being connected respectively and outlet (14) with described flowpath conduit (1)；
Supersonic wave metering device, described supersonic wave metering device includes that two ultrasonic transmitter-receivers (2), two described ultrasonic transmitter-receivers (2) are arranged on upper and along described flowpath conduit (1) the axially spaced-apart of described first body (10) and arrange；Two reflecting elements (3), it is arranged on the inside of described flowpath conduit (1), wherein, two described reflecting elements (3) are arranged with two described ultrasonic transmitter-receiver (2) one_to_one corresponding, the centerline axis parallel of the ultrasound wave that described ultrasonic transmitter-receiver (2) is launched propagation path between said two reflecting element (3) and described flowpath conduit (1) or overlap；
Display module, is arranged on the outer wall of described first body (10)；
Controller, described supersonic wave metering device and described display module electrically connect with described controller respectively, and described controller receives the signal of described supersonic wave metering device transmission and shown on described display module by metric results.
Ultrasonic water meter the most according to claim 1, it is characterized in that, the ultrasound wave that described ultrasonic transmitter-receiver (2) is launched is received so that described ultrasound wave forms N-type propagation path in described flowpath conduit (1) by ultrasonic transmitter-receiver another described (2) respectively after said two reflecting element (3) reflects.
Ultrasonic water meter the most according to claim 2, it is characterized in that, two described ultrasonic transmitter-receivers (2) shift to install in the axial direction of described flowpath conduit (1), and two described ultrasonic transmitter-receivers (2) are in the circumferentially-spaced setting of described flowpath conduit (1).
Ultrasonic water meter the most according to claim 3, it is characterised in that two described ultrasonic transmitter-receivers (2) are 180 ° relative to the central axis of described flowpath conduit (1) and are symmetrical arranged.
Ultrasonic water meter the most according to claim 2, it is characterized in that, two described reflecting elements (3) shift to install in the axial direction of described flowpath conduit (1), and two described reflecting elements (3) are in the circumferentially-spaced setting of described flowpath conduit (1).
Ultrasonic water meter the most according to claim 2, it is characterized in that, there is between ultrasound wave and the reflecting surface of a described reflecting element (3) that one described ultrasonic transmitter-receiver (2) is launched the first incident angle α, there is between ultrasound wave and the reflecting surface of another described reflecting element (3) that another described ultrasonic transmitter-receiver (2) receives the second incidence angle β.
Ultrasonic water meter the most according to claim 6, it is characterised in that the described first incident angle α and the described second incident angle β are 45 °.
Ultrasonic water meter the most according to any one of claim 1 to 7, it is characterized in that, described flowpath conduit (1) includes the first pipeline section (11) and is correspondingly arranged at two second pipeline sections (12) at described first pipeline section (11) two ends respectively, wherein, the internal diameter of described first pipeline section (11) is correspondingly arranged at two described second pipeline sections (12) inside respectively less than the internal diameter of described second pipeline section (12), two described reflecting elements (3).
Ultrasonic water meter the most according to any one of claim 1 to 7, it is characterised in that described reflecting element (3) includes reflecting surface (31) and the turbulent portion (32) being connected with described reflecting surface (31).
Ultrasonic water meter the most according to any one of claim 1 to 7, it is characterized in that, described ultrasonic water meter also includes two first installations through hole (15) being arranged on the tube wall of described flowpath conduit (1), described first installs through hole (15) connects with the inside of described flowpath conduit (1), installs through hole (15) for two described first and arranges with two described ultrasonic transmitter-receiver (2) one_to_one corresponding respectively.
11. ultrasonic water meters according to any one of claim 1 to 7, it is characterized in that, described ultrasonic water meter also includes two second installations through hole (16) being arranged on the tube wall of described flowpath conduit (1), described second installs through hole (16) connects with the inside of described flowpath conduit (1), and two described reflecting elements (3) are correspondingly arranged at said two second respectively and install the inside of through hole (16).
12. ultrasonic water meters according to any one of claim 1 to 7, it is characterised in that described supersonic wave metering device also includes:
Propagation time metering unit, is used for measuring the ultrasonic propagation time between said two ultrasonic transmitter-receiver (2)；
Flow rate calculation parts, calculate the flow of fluid to be batched according to the signal of described propagation time metering unit transmission.
13. ultrasonic water meters according to any one of claim 1 to 7, it is characterised in that described ultrasonic water meter also includes:
Second body (20), described second body (20) is obliquely installed relative to described first body (10)；
Temperature sensor, described temperature sensor is arranged on the interior temperature treating fluid measured with test of described second body (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100731.XU CN205449178U (en) | 2015-12-24 | 2015-12-24 | Ultrasonic water meter |
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| CN201521100731.XU CN205449178U (en) | 2015-12-24 | 2015-12-24 | Ultrasonic water meter |
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| CN205449178U true CN205449178U (en) | 2016-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424110A (en) * | 2015-12-24 | 2016-03-23 | 东京计装株式会社 | Ultrasonic wave water meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424110A (en) * | 2015-12-24 | 2016-03-23 | 东京计装株式会社 | Ultrasonic wave water meter |
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