CN205373791U - Mass flow meter - Google Patents
Mass flow meter Download PDFInfo
- Publication number
- CN205373791U CN205373791U CN201620057444.3U CN201620057444U CN205373791U CN 205373791 U CN205373791 U CN 205373791U CN 201620057444 U CN201620057444 U CN 201620057444U CN 205373791 U CN205373791 U CN 205373791U
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- China
- Prior art keywords
- differential pressure
- vortex street
- sensor
- street sensor
- pressure generating
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Abstract
The utility model provides a mass flow meter, relates to meter technical field, and that solve is the technical problem who improves measurement accuracy. This flowmeter is including surveying buret, flow rate converter, it has differential pressure generating device to survey the buret internal fixation, is fixed with differential pressure sensor, vortex street sensor on the survey buret, the inductive head of differential pressure sensor and vortex street sensor all stretches into the lumen of surveying buret to the inductive head of vortex street sensor is located differential pressure generating device's rear side, flow rate converter has two and gathers signal input part, and two collection signal input part of flow rate converter are received respectively to the sensing signal output of differential pressure sensor and vortex street sensor. The utility model provides a flowmeter is applicable to the mass flow that measured flow personally experienced sth. Part of the body.
Description
Technical field
This utility model relates to metrical instrument technology, particularly relates to the technology of a kind of mass flowmenter.
Background technology
In prior art, the Coriolis mass flowmeter according to Coriolis force principle and the thermal type gas quality flow meter according to thermal diffusion principle are commonly used for technical process measurement and metering.
But, the use of Coriolis mass flowmeter and thermal type gas quality flow meter can be limited by fluid media (medium) and working condition, is restricted (such as, flow measurement of steam, high-temperature, high pressure fluid etc.) in some technical process measurement with metrology applications.It addition, Coriolis mass flowmeter is also frequently present of the defect that zero point is unstable in the application, thus having influence on certainty of measurement, thermal type gas quality flow meter is then easily subject to dust pollution in high temperature with high dust fluid is applied, thus also influencing whether certainty of measurement.
Utility model content
For the defect existed in above-mentioned prior art, technical problem to be solved in the utility model is to provide the mass flowmenter that a kind of certainty of measurement is high.
In order to solve above-mentioned technical problem, a kind of mass flowmenter provided by the utility model, including measuring pipe, flow converter, it is characterised in that: it is fixed with differential pressure generating in described measurement pipe, measures and pipe is fixed with differential pressure pick-up, vortex street sensor；
The inductive head of described differential pressure pick-up and vortex street sensor all stretches into the tube chamber measuring pipe, and the inductive head of vortex street sensor is positioned at the rear side of differential pressure generating；
Described flow converter has two and gathers signal input part, and the induced signal outfan of differential pressure pick-up and vortex street sensor is coupled with two collection signal input parts of flow converter.
Further, described differential pressure generating is Annubar differential pressure generating.
The mass flowmenter that this utility model provides, can directly calculate according to the induced signal of differential pressure pick-up and vortex street sensor and obtain mass flow value, do not need temperature and pressure correction, have the advantages that certainty of measurement is high, but also the density of fluid media (medium) can be calculated, less than Coriolis mass flowmeter crushing, cost is low, and the application of applicable high-temperature, high pressure fluid, high temperature with high dust fluid.
Accompanying drawing explanation
Cut away view is looked on the right side that Fig. 1 is the mass flowmenter of this utility model embodiment.
Detailed description of the invention
Illustrate embodiment of the present utility model is described in further detail below in conjunction with accompanying drawing; but the present embodiment is not limited to this utility model; every employing analog structure of the present utility model and similar change thereof; all should listing protection domain of the present utility model in, the pause mark in this utility model all represents the relation of sum.
As it is shown in figure 1, a kind of mass flowmenter that this utility model embodiment provides, including measuring pipe 1, flow converter 2, it is characterised in that: it is fixed with differential pressure generating 3 in described measurement pipe 1, measures and pipe 1 is fixed with differential pressure pick-up 4, vortex street sensor 5；
The inductive head of described differential pressure pick-up 4 and vortex street sensor 5 all stretches into the tube chamber measuring pipe, and the inductive head of vortex street sensor 5 is positioned at the rear side of differential pressure generating 3；
Described flow converter 2 has two and gathers signal input part, and the induced signal outfan of differential pressure pick-up 4 and vortex street sensor 5 is coupled with two collection signal input parts of flow converter 2.
This utility model embodiment, described differential pressure generating 3 is Annubar differential pressure generating.
This utility model embodiment is applicable to measure the mass flow of fluid, and its operation principle is as follows:
Fluid enters from the front end mouth of pipe measuring pipe 1, and flow backward measuring in pipe 1, differential pressure generating 3 has dual function, and its first effect is to provide differential flow signal for differential pressure pick-up 4, second effect is to double as eddy generator, provides vortex flowmeter signals for vortex street sensor 5；
Flow converter 2 calculates the mass flow of fluid according to the induced signal of differential pressure pick-up 4 and vortex street sensor 5, and its computational methods are as follows:
The computing formula of differential pressure mass flow is: Qm=K△p*(△P*ρ(p,t))1/2
The computing formula of vortex mass flow is: Qm=(f/Kw)*ρ(p,t)
Wherein, QmFor the mass flow of fluid, K△pFor the discharge coefficient of differential pressure pick-up, △ P is the differential pressure detected of differential pressure pick-up, and (p, t) for the density of fluid, f is the frequency of vortex street sensor to ρ, KwDischarge coefficient for vortex street sensor；
The computing formula of vortex mass flow substitutes into the computing formula of differential pressure mass flow, and the mass flow calculation formula that can obtain fluid is:
Qm=(K△p)2*Kw*(△P/f)
After calculating the mass flow of fluid, it is also possible to according to the computing formula of differential pressure mass flow calculate fluid density p (p, t).
Claims (2)
1. a mass flowmenter, including measuring pipe, flow converter, it is characterised in that: it is fixed with differential pressure generating in described measurement pipe, measures and pipe is fixed with differential pressure pick-up, vortex street sensor；
The inductive head of described differential pressure pick-up and vortex street sensor all stretches into the tube chamber measuring pipe, and the inductive head of vortex street sensor is positioned at the rear side of differential pressure generating；
Described flow converter has two and gathers signal input part, and the induced signal outfan of differential pressure pick-up and vortex street sensor is coupled with two collection signal input parts of flow converter.
2. mass flowmenter according to claim 1, it is characterised in that: described differential pressure generating is Annubar differential pressure generating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057444.3U CN205373791U (en) | 2016-01-21 | 2016-01-21 | Mass flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057444.3U CN205373791U (en) | 2016-01-21 | 2016-01-21 | Mass flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205373791U true CN205373791U (en) | 2016-07-06 |
Family
ID=56272986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620057444.3U Expired - Fee Related CN205373791U (en) | 2016-01-21 | 2016-01-21 | Mass flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205373791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759939A (en) * | 2018-05-11 | 2018-11-06 | 福标测量仪表（上海）有限公司 | A kind of flow-measuring method |
-
2016
- 2016-01-21 CN CN201620057444.3U patent/CN205373791U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759939A (en) * | 2018-05-11 | 2018-11-06 | 福标测量仪表（上海）有限公司 | A kind of flow-measuring method |
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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: 20160706 Termination date: 20210121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |