CN204649252U - A kind of taper mass flowmeter for vortex street - Google Patents
A kind of taper mass flowmeter for vortex street Download PDFInfo
- Publication number
- CN204649252U CN204649252U CN201520063211.XU CN201520063211U CN204649252U CN 204649252 U CN204649252 U CN 204649252U CN 201520063211 U CN201520063211 U CN 201520063211U CN 204649252 U CN204649252 U CN 204649252U
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- vortex
- taper
- direct piping
- conversion unit
- signal conversion
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Abstract
The utility model discloses a kind of taper mass flowmeter for vortex street, comprise direct piping, taper differential pressure pick-up and vortex frequency sensor; Described direct piping inside is provided with tapered section fluid element; The both sides of described tapered section fluid element are respectively equipped with the taper differential pressure pick-up and vortex frequency sensor that are communicated with direct piping; Described taper differential pressure pick-up is located at outside direct piping, and comprise the pressure obtaning device, valve group and the many reference amounts transmitter that connect successively, described pressure obtaning device is communicated with the positive/negative-pressure side of tapered section fluid element; Described vortex frequency sensor comprises the eddy generator be located in direct piping, vortex detection probe and is located at direct piping outer and to pop one's head in the vortex frequency signal conversion unit be connected with vortex detection, pop one's head in vortex detection and be connected in described vortex frequency signal conversion unit one end, the other end is connected with many reference amounts transmitter.This device is used for measurement gas mass of medium flow, and drag losses is little, and measuring accuracy is high, and structure is simple, and cost is low.
Description
Technical field
The utility model relates to field of flow measurement, particularly relates to a kind of a kind of taper mass flowmeter for vortex street for measuring gas or liquid medium mass rate in circular pipe.
Background technology
Mass rate refers in the unit interval, fluid passes through the fluid mass of closed conduct or open channel free area, unit: kg/ (m^2*h), kg/ (m^2*s), mass rate and volumetric flow rate (volume that unit interval fluid passes through) correspondence, can be expressed as the product of volumetric flow rate and fluid density.
The mass rate of current measurement fluid has direct method and indirect method two kinds of modes.Coriolis mass flowmeters is the Typical Representative of direct method, and fluid can produce a power to tube wall when the Bottomhole pressure rotated, and it is that Coriolis finds when the research hydraulic turbine in 1832, is called for short coriolis force.Mass flowmeter is based on coriolis force, two parallel T type vibration tubes are had at sensor internal, drive coil is equipped with at middle part, pick-up coil is equipped with at two ends, when the driving voltage that transmitter provides is added on drive coil, vibrating tube does oscillation cycle vibration, the fluid media (medium) of industrial process flows through the vibrating tube of sensor, coriolis force effect will be produced on vibration tube, make two vibration tube twisting vibrations, the pick-up coil being arranged on vibration tube two ends will produce two groups of different signals of phase place, these two signal difference and the proportional relation of liquid mass flow flowing through sensor.Machine solution calculates the mass rate flowing through vibration tube.When different media flows through sensor, the master oscillator frequenc of vibration tube is different, calculates Media density accordingly.Its precision is high, and function is strong, but complex structure, price are high, and to gas, the particularly measurement of low-pressure gas, because the coriolis force produced is more weak, measuring error is large.
By measuring fluid constituents, obtain fluid density, thus to obtain fluid mass be the mass flowmeter of indirect method, but will measure fluid constituents and need to use chromatograph, price is also very expensive, is not easy to apply.
In field of flow measurement, often need real-time detecting mixing gas, the mixed gas namely containing many components medium, as: dry gas, unstripped gas, rock gas, mixed gas, steam etc.; Because its component situation is complicated, conventional its mass rate of measurement device is adopted to be difficult to realize.Middle small-bore pipeline adopt the supporting proximate analysis instrument of volumetric displacement meter or on-line densimeter realize the method revised, expensive, should not adopt.
Summary of the invention
The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of taper mass flowmeter for vortex street being applicable to measurement gas medium, and it, by measuring taper differential pressure and vortex shedding frequency, extrapolates density and the quality of detected fluid.Its drag losses is little, and measuring accuracy is high, and structure is simple, and cost is low.
For solving problems of the prior art, the concrete technical scheme of employing is:
A kind of taper mass flowmeter for vortex street, comprises direct piping, taper differential pressure pick-up and vortex frequency sensor; Described direct piping inside is provided with tapered section fluid element; The both sides of described tapered section fluid element are respectively equipped with the taper differential pressure pick-up and vortex frequency sensor that are communicated with direct piping; Described taper differential pressure pick-up is located at outside direct piping, and described taper differential pressure pick-up comprises the pressure obtaning device, valve group and the many reference amounts transmitter that connect successively, and described pressure obtaning device is communicated with the positive/negative-pressure side of described tapered section fluid element; Described vortex frequency sensor comprises eddy generator, vortex detection probe and to pop one's head in the vortex frequency signal conversion unit be connected with vortex detection, described eddy generator and vortex detection probe are installed in direct piping, described vortex frequency signal conversion unit is located at the outer and one end of described direct piping and is popped one's head in vortex detection and be connected, and the other end is connected with many reference amounts transmitter.
Preferred scheme, described tapered section fluid element is round table-like.
Preferred scheme further, described eddy generator is rectangular-shaped.
Further preferred scheme, described vortex frequency sensor also comprises signal conversion unit support bar, and described signal conversion unit support bar is fixed on direct piping, and described vortex frequency signal conversion unit is fixed on signal conversion unit support bar.
Further preferred scheme again, described signal conversion unit support bar is a hollow tube, and the connecting line between described vortex detection probe and vortex frequency signal conversion unit is by managing interior extraction.
Described direct piping two ends are provided with pipeline coupling flange.
By adopting such scheme, compared with prior art, its technique effect is taper mass flowmeter for vortex street of the present utility model: adopt straight pipe type passage, be convenient to gaseous fluid and pass through; Tapered section fluid element is located at direct piping inside, its two ends are provided with pressure obtaning device and vortex detection probe, and when fluid flows through, pressure obtaning device obtains differential pressure value and vortex frequency simultaneously, the flow of fluid can be obtained according to the vortex frequency produced, and have nothing to do with the density of fluid; Again in conjunction with the time of measurement, can obtain quality and the flow of fluid, the structure of whole product is simple, and drag losses is little, and measuring accuracy is high, and cost is low, is applicable to the mass flow measurement of gas medium.
Accompanying drawing explanation
Fig. 1 is the front elevation of the utility model taper mass flowmeter for vortex street;
Fig. 2 is the right side view of the utility model taper mass flowmeter for vortex street.
Embodiment
Below in conjunction with the embodiment shown in Fig. 1 and Fig. 2, the utility model is further described:
As depicted in figs. 1 and 2:
A kind of taper mass flowmeter for vortex street, comprises direct piping 1, taper differential pressure pick-up 2 and vortex frequency sensor 3, described direct piping 1 two ends are provided with pipeline coupling flange 5, and inside is provided with round table-like tapered section fluid element 4, the both sides of described tapered section fluid element 4 are respectively equipped with the taper differential pressure pick-up 2 and vortex frequency sensor 3 that are communicated with direct piping 1, described taper differential pressure pick-up 2 comprises the pressure obtaning device 21, valve group 22 and the many reference amounts transmitter 23 that connect successively, and described pressure obtaning device 21 is communicated with the positive/negative-pressure side of described tapered section fluid element 4, described vortex frequency sensor 3 comprises eddy generator 31, vortex detection probe 32, signal conversion unit support bar 33 and vortex frequency signal conversion unit 34, described eddy generator 31 and vortex detection probe 32 are installed in direct piping 1, connection line 35 is had between described vortex detection probe 32 and vortex frequency signal conversion unit 34, the other end of described signal conversion unit 34 is connected by associated line 36 with described many reference amounts transmitter 23, described signal conversion unit support bar 33 is hollow tubular and is fixed on described direct piping 1, described vortex frequency signal conversion unit 34 is fixed on signal conversion unit support bar 33, connection line 35 between described vortex detection probe 32 and vortex frequency signal conversion unit 34 is arranged in the pipe of signal conversion unit support bar 33.
The utility model taper mass flowmeter for vortex street realizes the measurement of convection cell mass rate by following steps: detected gas medium enters in the utility model taper mass flowmeter for vortex street with certain flow velocity through direct piping 1, through tapered section fluid element 4, flow velocity increases herein, then flows out from direct piping 1.Because gas medium flow velocity in direct piping 1 changes, pressure obtaning device 21 obtains pressure difference, inputs many reference amounts transmitter 23 by measuring the differential pressure signal obtained through measuring valve group 22.Tapered section fluid element 4 is arranged in direct piping 1, the fluid of high flow rate can produce the whirlpool of certain frequency when even speed tube restricting element 4, the frequency of vortex is only relevant to rate-of flow, and has nothing to do with Media density, and the vortex detection probe 32 be then installed in direct piping 1 detects.The vortex frequency detected is delivered to vortex frequency signal conversion unit 34 and is input to many reference amounts transmitter 23 through vortex frequency signal conversion unit 34, calculates mass rate transmit output 4 ~ 20mA+HART signal by many reference amounts transmitter 23.
Can be measured, as density, quality and volume the fluid through this taper mass flowmeter for vortex street in real time by many reference amounts transmitter 23.This product is applicable to various gas detect, as: dry gas (unstripped gas), rock gas, mixed gas, steam etc.
The foregoing is only preferred embodiment of the present utility model; not in order to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any amendment done, equivalent to replace, be all included within protection domain of the present utility model.
Claims (6)
1. a taper mass flowmeter for vortex street, is characterized in that: it comprises direct piping, taper differential pressure pick-up and vortex frequency sensor; Described direct piping inside is provided with tapered section fluid element; The both sides of described tapered section fluid element are respectively equipped with the taper differential pressure pick-up and vortex frequency sensor that are communicated with direct piping; Described taper differential pressure pick-up is located at outside direct piping, and described taper differential pressure pick-up comprises the pressure obtaning device, valve group and the many reference amounts transmitter that connect successively, and described pressure obtaning device is communicated with the positive/negative-pressure side of described tapered section fluid element; Described vortex frequency sensor comprises eddy generator, vortex detection probe and to pop one's head in the vortex frequency signal conversion unit be connected with vortex detection, described eddy generator and vortex detection probe are installed in direct piping, described vortex frequency signal conversion unit is located at the outer and one end of described direct piping and is popped one's head in vortex detection and be connected, and the other end is connected with many reference amounts transmitter.
2. a kind of taper mass flowmeter for vortex street according to claim 1, is characterized in that: described tapered section fluid element is round table-like.
3. a kind of taper mass flowmeter for vortex street according to claim 1, is characterized in that: described eddy generator is rectangular-shaped.
4. a kind of taper mass flowmeter for vortex street according to claim 1, it is characterized in that: described vortex frequency sensor also comprises signal conversion unit support bar, described signal conversion unit support bar is fixed on direct piping, and described vortex frequency signal conversion unit is fixed on signal conversion unit support bar.
5. a kind of taper mass flowmeter for vortex street according to claim 2, is characterized in that: described signal conversion unit support bar is a hollow tube, and the connecting line between described vortex detection probe and vortex frequency signal conversion unit is by managing interior extraction.
6. a kind of taper mass flowmeter for vortex street according to claim 1, is characterized in that: described direct piping two ends are provided with pipeline coupling flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520063211.XU CN204649252U (en) | 2015-01-29 | 2015-01-29 | A kind of taper mass flowmeter for vortex street |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520063211.XU CN204649252U (en) | 2015-01-29 | 2015-01-29 | A kind of taper mass flowmeter for vortex street |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204649252U true CN204649252U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520063211.XU Expired - Fee Related CN204649252U (en) | 2015-01-29 | 2015-01-29 | A kind of taper mass flowmeter for vortex street |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896120A (en) * | 2018-08-23 | 2018-11-27 | 中国石油天然气股份有限公司 | Vortex street throttling integrated gas-liquid two-phase flowmeter and application method thereof |
-
2015
- 2015-01-29 CN CN201520063211.XU patent/CN204649252U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896120A (en) * | 2018-08-23 | 2018-11-27 | 中国石油天然气股份有限公司 | Vortex street throttling integrated gas-liquid two-phase flowmeter and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: Jinshan District Fengjing town 201501 Shanghai Xinghao Road No. 7 Patentee after: SHANGHAI KEYONTECHS CO., LTD. Address before: Jinshan District Fengjing town Shanghai City No. 109 201501 Cao Lilu Building 1 room 101 Patentee before: SHANGHAI KEYONTECHS CO., LTD. |
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| CP02 | Change in the address of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20200129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |