CN204514404U - A kind of modified taper mass flowmeter for vortex street - Google Patents

A kind of modified taper mass flowmeter for vortex street Download PDF

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Publication number
CN204514404U
CN204514404U CN201520136011.2U CN201520136011U CN204514404U CN 204514404 U CN204514404 U CN 204514404U CN 201520136011 U CN201520136011 U CN 201520136011U CN 204514404 U CN204514404 U CN 204514404U
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China
Prior art keywords
vortex
taper
direct piping
differential pressure
tapered section
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CN201520136011.2U
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Chinese (zh)
Inventor
周人
汪湛
吕志国
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SHANGHAI KEYONTECHS CO Ltd
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SHANGHAI KEYONTECHS CO Ltd
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Abstract

The utility model discloses a kind of modified taper mass flowmeter for vortex street, 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 and the vortex detection that is electrically connected with eddy generator is popped one's head in, described eddy generator and vortex detection probe are installed in direct piping, and described vortex detection probe is drawn by associated line and is electrically connected with many reference amounts transmitter.This device is used for measurement gas mass of medium flow, and drag losses is less, and measuring accuracy is higher, and structure is simpler, and cost is lower.

Description

A kind of modified taper mass flowmeter for vortex street
Technical field
The utility model relates to field of flow measurement, particularly relates to a kind of a kind of modified 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 is for above-mentioned the deficiencies in the prior art, a kind of modified taper mass flowmeter for vortex street being applicable to measurement gas medium is provided, it is by measuring taper differential pressure and vortex shedding frequency, extrapolate density and the quality of detected fluid, drag losses is less, measuring accuracy is higher, and structure is simpler, and cost is lower.
For solving problems of the prior art, the concrete technical scheme of employing is:
A kind of modified 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 and the vortex detection that is electrically connected with eddy generator is popped one's head in, described eddy generator and vortex detection probe are installed in direct piping, and described vortex detection probe is drawn by associated line and is electrically connected with many reference amounts transmitter.
Preferred scheme, described tapered section fluid element is conical round table shape.
Preferred scheme further, described eddy generator is rectangular-shaped.
The preferred scheme of a step again, described direct piping two ends are provided with pipeline coupling flange.
By adopting such scheme, compared with prior art, its technique effect is modified 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, quality and the flow of fluid can be obtained; Eliminate vortex frequency signal conversion unit, the mode adopting vortex detection probe to be directly connected with many reference amounts transmitter, make the structure of whole product simpler, drag losses is less, and measuring accuracy is higher, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the front elevation of the utility model modified taper mass flowmeter for vortex street;
Fig. 2 is the right side view of the utility model modified 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 modified 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 the tapered section fluid element 4 of conical round table shape; 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 rectangular-shaped eddy generator 31 and the vortex detection that is electrically connected with eddy generator pops one's head in 32, described eddy generator 31 and vortex detection probe 32 are installed in direct piping 1, and described vortex detection probe 32 is drawn by associated line 33 and is electrically connected with many reference amounts transmitter 23.
The utility model modified 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 modified 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.Many reference amounts transmitter 23 is inputted through measuring valve group 22 by measuring the differential pressure signal obtained.Eddy generator 31 is arranged in direct piping 1, the fluid of high flow rate can produce the whirlpool of certain frequency when eddy generator 31, then the vortex detection probe 32 be installed in direct piping 1 detects, the vortex frequency detected is delivered to 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 (4)

1. a modified 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 and the vortex detection that is electrically connected with eddy generator is popped one's head in, described eddy generator and vortex detection probe are installed in direct piping, and described vortex detection probe is drawn by associated line and is electrically connected with many reference amounts transmitter.
2. a kind of modified taper mass flowmeter for vortex street according to claim 1, is characterized in that: described tapered section fluid element is conical round table shape.
3. a kind of modified taper mass flowmeter for vortex street according to claim 1, is characterized in that: described eddy generator is rectangular-shaped.
4. a kind of modified 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.
CN201520136011.2U 2015-03-11 2015-03-11 A kind of modified taper mass flowmeter for vortex street Active CN204514404U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520136011.2U CN204514404U (en) 2015-03-11 2015-03-11 A kind of modified taper mass flowmeter for vortex street

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520136011.2U CN204514404U (en) 2015-03-11 2015-03-11 A kind of modified taper mass flowmeter for vortex street

Publications (1)

Publication Number Publication Date
CN204514404U true CN204514404U (en) 2015-07-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520136011.2U Active CN204514404U (en) 2015-03-11 2015-03-11 A kind of modified taper mass flowmeter for vortex street

Country Status (1)

Country Link
CN (1) CN204514404U (en)

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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.

CP02 Change in the address of a patent holder