CN203929147U - A kind of two parameter mass flow meter - Google Patents
A kind of two parameter mass flow meter Download PDFInfo
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- CN203929147U CN203929147U CN201420277605.0U CN201420277605U CN203929147U CN 203929147 U CN203929147 U CN 203929147U CN 201420277605 U CN201420277605 U CN 201420277605U CN 203929147 U CN203929147 U CN 203929147U
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- 239000012530 fluid Substances 0.000 description 13
- 238000005259 measurement Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 4
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Abstract
The utility model discloses a kind of two parameter mass flow meter, comprise differential pressure transmitter, whirlpool frequency detecting device and be communicated with successively entrance, interlude and outlet section, interlude is cylindrical tube, wherein, the inflow point of interlude is provided with the first pressure pipe, its exit is provided with the second pressure pipe, differential pressure device transmitter is communicated with the first pressure pipe and the second pressure pipe respectively, whirlpool frequency detecting device is arranged on the middle part of interlude, entrance and outlet section are tapered tube or circular arc tapered tube, the osculum of entrance is communicated with interlude, the osculum of outlet section is communicated with interlude.Two parameter mass flow meters that the utility model provides can be realized obtaining pressure reduction numerical value and two parameters of whirlpool frequency, thereby realize the metering of the mass rate under the irregular change condition of mixing ratio to mixed gas, particularly can meet low pressure and become component gas mass rate metering requirement.
Description
Technical field
The utility model relates to flowmeter technology field, relates in particular to a kind of two parameter mass flow meter.
Background technology
The mass rate of measuring at present fluid has direct method.Coriolis mass flowmeters is the Typical Representative of direct method, and fluid can produce a power to tube wall while flowing in the pipe of rotation, and it is that Coriolis is found in the time of the research hydraulic turbine in 1832, is called for short coriolis force.Mass flowmeter is taking coriolis force as basis, there are two parallel T-shaped vibration tubes 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 is done oscillation cycle vibration, the flow through vibrating tube of sensor of fluid media (medium), will on vibration tube, produce coriolis force effect, make two vibration tube twisting vibrations, the pick-up coil that is arranged on vibration tube two ends will produce two groups of different signals of phase place, the proportional relation of fluid mass flow of these two signal difference and the sensor of flowing through.Machine solution calculates the mass rate of the vibration tube of flowing through.Different MEDIA FLOW is in the time of sensor, and the master oscillator frequenc difference of vibration tube, calculates Media density accordingly.Its precision is high, and function is strong, but complex structure, price are high, to gas, the particularly measurement of low-pressure gas, due to the coriolis force producing a little less than, cause measuring error large.And coriolis mass flowmeters can only be applicable on middle small-bore pipeline,
And in flow measurement field, often need real-time detecting mixing gas, contain the mixed gas of polycomponent medium, as: dry gas, unstripped gas, rock gas, mixed gas, steam etc.; Due to its component situation complexity, adopt its mass rate of conventional measurement device to be difficult to realize.
Therefore, how a kind of mass flowmeter is provided, to reduce the measuring error of low-pressure gas, and can realizes the mass flow measurement to polycomponent mixed gas, can also be applied in the measurement of heavy caliber gas mass flow, be current those skilled in the art technical matterss urgently to be resolved hurrily.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of two parameter mass flow meter, to reduce the measuring error of low-pressure gas, and the mass flow measurement to polycomponent mixed gas can be realized, the measurement of heavy caliber gas mass flow can also be applied in.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of two parameter mass flow meter, comprise differential pressure transmitter, whirlpool frequency detecting device and be communicated with successively entrance, interlude and outlet section, described interlude is cylindrical tube, wherein, the inflow point of described interlude is provided with the first pressure pipe, its exit is provided with the second pressure pipe, described differential pressure device transmitter is communicated with described the first pressure pipe and described the second pressure pipe respectively, described whirlpool frequency detecting device is arranged on the middle part of described interlude, described entrance and described outlet section are tapered tube or circular arc tapered tube, the osculum of described entrance is communicated with described interlude, the osculum of described outlet section is communicated with described interlude.
Preferably, on above-mentioned the first pressure pipe and described the second pressure pipe, be provided with valve.
Preferably, above-mentioned whirlpool frequency detecting device is included in the eddy generator and the described whirlpool frequency probe that in described interlude, arrange.
Preferably, above-mentioned whirlpool frequency detecting device is vortex shedding flow meter.
Preferably, the ratio of the inner diameter d of above-mentioned interlude and the front inner diameter D of entrance is 0.3≤d/D≤1.0.
Preferably, above-mentioned the first pressure pipe and described the second pressure pipe all with described interlude vertical connection.
Preferably, the internal diameter of above-mentioned interlude is d, and the axis of described the first pressure pipe is to the distance L of the left side of described whirlpool frequency detecting device
afor: 0.1d≤L
a≤ 4d; The axis of described the second pressure pipe is to the distance L of described whirlpool frequency detecting device right side
bfor: 0.1d≤L
b≤ 4d.
Preferably, the cone angle alpha of above-mentioned entrance
afor: 15 °≤α
a≤ 120 °.
Preferably, the cone angle alpha of above-mentioned outlet section
bfor: 30 °≤α
b≤ 60 °.
Two parameter mass flow meters that the utility model provides, comprise differential pressure transmitter, whirlpool frequency detecting device and be communicated with successively entrance, interlude and outlet section, described interlude is cylindrical tube, wherein, the inflow point of described interlude is provided with the first pressure pipe, its exit is provided with the second pressure pipe, described differential pressure device transmitter is communicated with described the first pressure pipe and described the second pressure pipe respectively, described whirlpool frequency detecting device is arranged on the middle part of described interlude, described entrance and described outlet section are tapered tube or circular arc tapered tube, the osculum of described entrance is communicated with described interlude, the osculum of described outlet section is communicated with described interlude.When use, medium fluid enters from entrance, enter into interlude, after whirlpool frequency detecting device, flow out from outlet section, in this process, the first pressure pipe be positioned at whirlpool frequency detecting device before, the second pressure pipe be positioned at whirlpool frequency detecting device after, the first pressure pipe and the second pressure pipe complete the pressure before and after whirlpool frequency detecting device, obtain pressure reduction numerical value through differential pressure transmitter, whirlpool frequency detecting device obtains whirlpool frequency simultaneously, obtaining of pressure reduction numerical value and two parameters of whirlpool frequency, thereby realize the mass flow measurement to polycomponent mixed gas, can also be applied in the measurement of heavy caliber gas mass flow.
And, entrance and outlet section are tapered tube or circular arc tapered tube, the osculum of entrance is communicated with interlude, and the osculum of outlet section is communicated with interlude, so in the time that medium fluid enters into interlude from entrance, can improve flow velocity, simultaneously can realize rectification, out time, can avoid the pressure loss excessive from outlet section, be that interlude adopts through type cylindrical tube passage, be convenient to medium fluid and pass through; Entrance adopts convergent mode, can play the effect of fluid rectification raising flow velocity; Outlet section adopts flaring mode, can recover pipeline pressure, reduces drag losses.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of two parameter mass flow meters that Fig. 1 provides for the utility model embodiment.
In upper Fig. 1:
The first pressure pipe 11, valve 12, differential pressure transmitter 13, eddy generator 21, whirlpool frequency probe 22, entrance 31, interlude 32, outlet section 33.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the structural representation of two parameter mass flow meters that Fig. 1 provides for the utility model embodiment.
Two parameter mass flow meters that the utility model provides, comprise differential pressure transmitter 13, whirlpool frequency detecting device and be communicated with successively entrance 31, interlude 32 and outlet section 33, interlude 32 is cylindrical tube, wherein, the inflow point of interlude 32 is provided with the first pressure pipe 11, the exit of interlude 32 is provided with the second pressure pipe, differential pressure device transmitter 13 is communicated with the first pressure pipe 11 and the second pressure pipe respectively, whirlpool frequency detecting device is arranged on the middle part of interlude 32, entrance 31 and outlet section 33 are tapered tube or circular arc tapered tube, the osculum of entrance 31 is communicated with interlude 32, the osculum of outlet section 33 is communicated with interlude 32.When use, fluid enters from entrance 31, enter into interlude 32, after whirlpool frequency detecting device, flow out from outlet section 33, in this process, the first pressure pipe 11 be positioned at whirlpool frequency detecting device before, the second pressure pipe be positioned at whirlpool frequency detecting device after, the first pressure pipe 11 and the second pressure pipe complete the pressure before and after whirlpool frequency detecting device, obtain pressure reduction numerical value through differential pressure transmitter 13, whirlpool frequency detecting device obtains whirlpool frequency simultaneously, obtaining of pressure reduction numerical value and two parameters of whirlpool frequency, realize the mass flow measurement to polycomponent mixed gas.
And, entrance 31 and outlet section 33 are tapered tube or circular arc tapered tube, concrete, the front end of entrance can be cylindrical tube, as shown in Figure 1, the osculum of entrance 31 is communicated with interlude 32, the osculum of outlet section 33 is communicated with interlude 32, in the time that medium fluid enters into interlude 32 from entrance 31, can improve flow velocity so, can realize rectification simultaneously, from outlet section 33 out time, can avoid the pressure loss excessive, interlude 32 adopts through type cylindrical tube passage, is convenient to medium fluid and passes through; Entrance 31 adopts convergent mode, can play the effect of fluid rectification raising flow velocity; Outlet section 33 adopts flaring mode, can recover pipeline pressure, reduces drag losses.
And, whole product simple in structure, because each junction is gradual change type one, drag losses is little, and cost is low, is particularly useful for the mass flow measurement of gas medium.
Two parameter mass flow meters that the utility model provides can be realized the obtaining of pressure reduction numerical value and two parameters of whirlpool frequency, thereby can reduce measuring error when low-pressure gas is measured, and also can realize the measurement to polycomponent mixed gas.
In order further to optimize such scheme, on the first pressure pipe 11 and the second pressure pipe, be provided with valve 12, in the time that needs are measured, Open valve 12, thus realize with using with survey.
In order further to optimize such scheme, whirlpool frequency detecting device is included in the eddy generator 21 and the whirlpool frequency probe 22 that in interlude 32, arrange, when medium fluid enters into after interlude 32, during by eddy generator 21, produce whirlpool, then pop one's head in 22 o'clock through whirlpool frequency, whirlpool frequency probe 22 obtains whirlpool frequency, certainly, whirlpool frequency detecting device can be also vortex shedding flow meter, and flux of vortex street is counted prior art, can obtain equally whirlpool frequency.
In order further to optimize such scheme, the inner diameter d of interlude 32 is 0.3≤d/D≤1.0 with the ratio of the front inner diameter D of entrance 31, plays the effect that improves flow velocity and rectification.
In order further to optimize such scheme, the first pressure pipe 11 and the second pressure pipe all with interlude 32 vertical connections, more accurate when pressure.
In order further to optimize such scheme, the internal diameter of interlude 32 is d, and the axis of the first pressure pipe 11 is to the distance L of the left side of whirlpool frequency detecting device
afor: 0.1d≤L
a≤ 4d; The axis of the second pressure pipe is to the distance L of the right side of whirlpool frequency detecting device
bfor: 0.1d≤L
b≤ 4d, makes the first pressure pipe 11 and the second pressure pipe obtain more accurate differential pressure numerical value.
In order further to optimize such scheme, the cone angle alpha of entrance 31
afor: 15 °≤α
a≤ 120 °, better to realize the effect that improves flow velocity, rectification.
In order further to optimize such scheme, the cone angle alpha of outlet section 33
bfor: 30 °≤α
b≤ 60 °, better to reduce the pressure loss.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. two parameter mass flow meters, is characterized in that, comprise differential pressure transmitter, whirlpool frequency detecting device and be communicated with successively entrance, interlude and outlet section, described interlude is cylindrical tube,
Wherein, the inflow point of described interlude is provided with the first pressure pipe, and its exit is provided with the second pressure pipe, and described differential pressure device transmitter is communicated with described the first pressure pipe and described the second pressure pipe respectively,
Described whirlpool frequency detecting device is arranged on the middle part of described interlude,
Described entrance and described outlet section are tapered tube or circular arc tapered tube, and the osculum of described entrance is communicated with described interlude, and the osculum of described outlet section is communicated with described interlude.
2. according to claim 1 pair of parameter mass flow meter, is characterized in that, on described the first pressure pipe and described the second pressure pipe, is provided with valve.
3. according to claim 1 pair of parameter mass flow meter, is characterized in that, described whirlpool frequency detecting device is included in the eddy generator and the described whirlpool frequency probe that in described interlude, arrange.
4. according to claim 1 pair of parameter mass flow meter, is characterized in that, described whirlpool frequency detecting device is vortex shedding flow meter.
5. according to claim 1 pair of parameter mass flow meter, is characterized in that, the inner diameter d of described interlude is 0.3≤d/D≤1.0 with the ratio of the front inner diameter D of entrance.
6. according to claim 1 pair of parameter mass flow meter, is characterized in that, described the first pressure pipe and described the second pressure pipe all with described interlude vertical connection.
7. according to claim 6 pair of parameter mass flow meter, is characterized in that, the internal diameter of described interlude is d, and the axis of described the first pressure pipe is to the distance L of the left side of described whirlpool frequency detecting device
afor: 0.1d≤L
a≤ 4d; The axis of described the second pressure pipe is to the distance L of described whirlpool frequency detecting device right side
bfor: 0.1d≤L
b≤ 4d.
8. according to claim 1 pair of parameter mass flow meter, is characterized in that, the cone angle alpha of described entrance
afor: 15 °≤α
a≤ 120 °.
9. according to claim 1 pair of parameter mass flow meter, is characterized in that, the cone angle alpha of described outlet section
bfor: 30 °≤α
b≤ 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277605.0U CN203929147U (en) | 2014-05-28 | 2014-05-28 | A kind of two parameter mass flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277605.0U CN203929147U (en) | 2014-05-28 | 2014-05-28 | A kind of two parameter mass flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929147U true CN203929147U (en) | 2014-11-05 |
Family
ID=51824948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277605.0U Expired - Lifetime CN203929147U (en) | 2014-05-28 | 2014-05-28 | A kind of two parameter mass flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203929147U (en) |
-
2014
- 2014-05-28 CN CN201420277605.0U patent/CN203929147U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 100191 room 30, garden north road, 801, Beijing, Haidian District Patentee after: BEIJING POSTAN NEW CENTURY MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Address before: 100000 No. 705, Garden Road, 10 Garden East Road, Beijing, Haidian District Patentee before: BEIJING POSTAN NEW CENTURY MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |
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| CX01 | Expiry of patent term |