CN203177908U - Thermal type vortex street flowmeter - Google Patents
Thermal type vortex street flowmeter Download PDFInfo
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- CN203177908U CN203177908U CN 201320121301 CN201320121301U CN203177908U CN 203177908 U CN203177908 U CN 203177908U CN 201320121301 CN201320121301 CN 201320121301 CN 201320121301 U CN201320121301 U CN 201320121301U CN 203177908 U CN203177908 U CN 203177908U
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- flow meter
- gauge outfit
- vortex shedding
- detection unit
- detecting unit
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Abstract
The utility model provides a thermal type vortex street flowmeter comprising a detection unit, a fluid pipe, an electronic gauge outfit and a lengthening pipe used for connecting the fluid pipe and the electronic gauge outfit. The detection unit is in electric connection with the electronic gauge outfit. A probe of the detection unit passes through the inside of the lengthening pipe and enters the fluid pipe. The detection unit comprises a thermal type flowmeter body and a vortex street flowmeter body. The electronic gauge outfit comprises an analysis and calibration module used for analyzing and calibrating the detection unit, a display module and a battery. The analysis and calibration module is respectively in electric connection with the detection unit, the display module and the battery. Compared with a traditional single flowmeter, the thermal type vortex street flowmeter has a wider measuring range, has a self calibration function capable of measuring data, and enables measured values to be more accurate.
Description
Technical field
The utility model belongs to the fluid measurement technical field, especially relates to a kind of hot type vortex shedding flow meter.
Background technology
Thermal flowmeter adopts the thermal diffusion principle in existing technology, thermal diffusion technology be a kind of under harsh conditions function admirable, technology that reliability is high.When heat type flow quantity is placed in the medium in respect of two temperature sensors, one of them sensor be heated to environment temperature above temperature, another temperature sensor is used for the induction medium temperature.Velocity of medium increases, and the heat that medium is taken away increases, and the temperature difference of two temperature sensors will change with the change in flow of medium, according to the proportionate relationship of temperature difference and velocity of medium, can draw the flow of fluid.The thermal flowmeter overwhelming majority at present is used for measurement gas, has only a small amount of thermal flowmeter to be used for measuring small fluid flow.
Vortex shedding flow meter is to lay a bluff body in fluid, and fluid is alternately separated in that the body both sides take place, and discharges two strings staggered vortex regularly, and the flowmeter that is directly proportional with flow of vortex shedding frequency within the specific limits.Vortex shedding flow meter is mainly used in the flow measurement of industrial pipeline medium fluid, as multiple media such as gas, liquid, steams.Be characterized in that the pressure loss is little, range ability is big, precision is high, when measuring the operating mode volumetric flow rate, be subjected to fluid density, pressure, temperature hardly, viscosity is isoparametric influences.No moving machinery part, so reliability height, maintenance is little.The instrument parameter can be steady in a long-term.Vortex shedding flow meter adopts piezoelectric stress formula sensor, and the reliability height can be worked in-20 ℃～+ 250 ℃ operating temperature range.
Yet above-mentioned two kinds of flowmeters are still existing some shortcomings, though the low discharge media sensitivity height of thermal flowmeter to flowing through wherein, the accuracy of its measurement is slightly inadequate with respect to vortex shedding flow meter; And the power of test of vortex shedding flow meter in the low discharge scope is relatively poor, often can't measure less flow value.
Summary of the invention
Problem to be solved in the utility model provides a kind of hot type vortex shedding flow meter, is particularly useful for measuring the bigger fluid of fluctuations in discharge scope.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of hot type vortex shedding flow meter, it is characterized in that: comprise detecting unit, fluid hose, electronics gauge outfit and the extension pipe that is used for being connected fluid hose and electronics gauge outfit, described detecting unit is electrically connected with described electronics gauge outfit, the probe of described detecting unit enters in the described fluid hose by described extension pipe inside, and described detecting unit comprises thermal flowmeter and vortex shedding flow meter;
Described electronics gauge outfit comprises analytic set module, display module and the battery of the described detecting unit of analytic set, and described analytic set module is electrically connected with described detecting unit, display module and battery respectively;
Further, the probe of described vortex shedding flow meter is the vortex street piezoelectric crystal;
Further, described display module comprises display screen and button.
Advantage and the good effect that the utlity model has are: owing to adopt technique scheme, utilize the advantage of measured rill value of thermal flowmeter and the advantage of the big flow good linearity of vortex shedding flow meter, thereby the two integration is enlarged range ratio of the present utility model, and final range ratio can reach more than the 1:100; On the other hand, because the vortex shedding flow meter accuracy is good during big flow, calibration module of the present utility model is by formula K=K*(1+n) (K is flow value accurately, K* is flow value to be calibrated, n is error ratio) thermal flowmeter is calibrated, thus guaranteed the accuracy that the thermal flowmeter low discharge is tested; The utility model has overcome thermal flowmeter poor accuracy and the immesurable shortcoming of vortex shedding flow meter rill value, has enlarged the range ratio of flowmeter, can satisfy the measurement of fluid flow in larger scope.
Description of drawings
Fig. 1 is the structural representation of present embodiment
Among the figure:
1, fluid hose 2, electronics gauge outfit 3, extension pipe
11, thermal flowmeter 12, vortex shedding flow meter
Embodiment
As shown in Figure 1, the utility model relates to a kind of hot type vortex shedding flow meter, comprise thermal flowmeter 11, vortex shedding flow meter 12, fluid hose 1, electronics gauge outfit 2 and the extension pipe 3 that is used for being connected fluid hose and electronics gauge outfit, thermal flowmeter 11 and vortex shedding flow meter 12 are electrically connected with electronics gauge outfit 2 respectively, and the probe of thermal flowmeter 11 and vortex shedding flow meter 12 enters in the fluid hose 1 by extension pipe 3 inside respectively; The electronics gauge outfit comprises analytic set module, display module and battery, the analytic set module is electrically connected with thermal flowmeter 11, vortex shedding flow meter 12, display module and battery respectively, and the analytic set module is used for the measuring-signal of thermal flowmeter 11 and vortex shedding flow meter 12 feedbacks is carried out analytic set; Display module comprises display screen and button, and the direction of motion of fluid in the fluid hose 1 is decided to be the rear, and then vortex shedding flow meter 12 is positioned at the front side of thermal flowmeter 11.
The course of work of this example: when passing through the gas of one big flow in the fluid hose, thermal flowmeter and vortex shedding flow meter measure the flow value by fluid simultaneously, because the measurement of vortex shedding flow meter is more accurate under the big flow, simultaneously calibration module uses K=K*(1+n according to the test result of vortex shedding flow meter) formula the measurement result of thermal flowmeter is calibrated, and recording error demonstrates the numerical value of thermal flowmeter measurement data after calibration than n in display module; When in the fluid hose when one rill body, vortex shedding flow meter can't measure data, the analyzed calibration module of the data that thermal flowmeter is measured is according to above-mentioned error ratio n and formula K=K*(1+n) calibrate, demonstrate numerical value after the calibration by display screen again.
More than an embodiment of the present utility model is had been described in detail, but described content only is preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the present utility model.
Claims (3)
1. hot type vortex shedding flow meter, it is characterized in that: comprise detecting unit, fluid hose, electronics gauge outfit and the extension pipe that is used for being connected fluid hose and electronics gauge outfit, described detecting unit is electrically connected with described electronics gauge outfit, the probe of described detecting unit enters in the described fluid hose by described extension pipe inside, and described detecting unit comprises thermal flowmeter and vortex shedding flow meter;
Described electronics gauge outfit comprises analytic set module, display module and the battery of the described detecting unit of analytic set, and described analytic set module is electrically connected with described detecting unit, display module and battery respectively.
2. hot type vortex shedding flow meter according to claim 1, it is characterized in that: the probe of described vortex shedding flow meter is the vortex street piezoelectric crystal.
3. hot type vortex shedding flow meter according to claim 2, it is characterized in that: described display module comprises display screen and button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320121301 CN203177908U (en) | 2013-03-18 | 2013-03-18 | Thermal type vortex street flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320121301 CN203177908U (en) | 2013-03-18 | 2013-03-18 | Thermal type vortex street flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203177908U true CN203177908U (en) | 2013-09-04 |
Family
ID=49074591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320121301 Expired - Fee Related CN203177908U (en) | 2013-03-18 | 2013-03-18 | Thermal type vortex street flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203177908U (en) |
-
2013
- 2013-03-18 CN CN 201320121301 patent/CN203177908U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20150318 |
|
| EXPY | Termination of patent right or utility model |