CN202171476U - Cavitation flow meter - Google Patents
Cavitation flow meter Download PDFInfo
- Publication number
- CN202171476U CN202171476U CN2011201717189U CN201120171718U CN202171476U CN 202171476 U CN202171476 U CN 202171476U CN 2011201717189 U CN2011201717189 U CN 2011201717189U CN 201120171718 U CN201120171718 U CN 201120171718U CN 202171476 U CN202171476 U CN 202171476U
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- Prior art keywords
- hole
- flowmeter
- fluid
- flow meter
- vortex
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Abstract
The utility model discloses a cavitation flow meter which comprises a connecting flange and a circulating pipeline, wherein a hole is arranged on the wall surface of the circulating pipeline; and the hole is provided with a temperature sensor and a pressure sensor which are respectively connected with a measuring circuit by leads. When fluid flows through the hole, vortex is generated in the hole, and the internal pressure has periodic oscillation. As the vortex frequency and the incoming flow speed are in proportion, the flow rate value and the temperature value can be obtained by measuring the pressure oscillation frequency and can be used for adjusting the measurement result.
Description
Technical field
The present invention relates to measure the device of fluid flow, is a kind of hole flowmeter.
Background technology
In the gas flow measurement field, the flowmeter that uses at present also only limits to differential pressure type (like orifice flowmeter, nozzle flowmeter, differential pressure type flowmeter etc.), turbo flow meter, vortex shedding flow meter or the like.Because fluid often often contains more impurity and moisture, perhaps be corrosive, to the burn into wearing and tearing of flowmeter, stop up and happen occasionally.In addition, above-mentioned flowmeter structure is complicated, and parts are many, as easy as rolling off a log wearing and tearing and damage, and maintenance cost is big.In a word, need a kind of flowmeter simple in structure, accurate, anti abrasive at present.
Summary of the invention
The purpose of this invention is to provide a kind of hole flowmeter, it is to utilize the hole on the fluid flows amount meter pipeline wall and flowmeter that the principle of the self sustained oscillation that produces is processed.Because the flow measurement of hole flowmeter is carried out in the hole, the parts that the without hindrance fluid of whole gauge internal flows so the pressure loss is very small, and does not have and stop up and wear phenomenon.
The technical scheme that the present invention adopts:
The hole flowmeter comprises that having joint flange and circulation duct forms, and a measurement hole is arranged on the circulation duct wall, measures on the hole temperature sensor and pressure transducer are housed, and be connected through the metering circuit of lead with the outside respectively.
When fluid flows through the hole, the forward position in the hole, fluid produces and separates, and the shear layer of separation collides the back edge in hole, in the hole, is reflected back toward the forward position, has formed the disturbance to the fluid in forward position, and fluid continues to separate.This process is continuing along with flowing of fluid, thereby in the hole, produces vortex, and the vibration of pressure cycle property forms self sustained oscillation, and its principle is as shown in Figure 1.Because vortex frequency and speed of incoming flow are proportional.Thereby the gaging pressure oscillator signal can obtain speed, thereby obtains flow value.Temperature sensor and pressure transducer are installed on the flowmeter, and the signal that records is delivered to metering circuit together, converts flow value the output of to normalized current signal.
Advantage of the present invention:
Flowmeter has adopted simple void structure, and flow measurement is only carried out in the hole that tube wall forms, and the parts that the without hindrance fluid of whole instrument flows are more solid and reliable on the structure, are not afraid of problems such as burn into wearing and tearing, obstruction, and the no pressure loss very.
Description of drawings
The schematic diagram that Fig. 1 self sustained oscillation forms;
The structural representation of Fig. 2 hole flowmeter;
Embodiment
As shown in Figure 2, it comprises and has joint flange 1 and circulation duct 2 that a hole 4 is arranged on the circulation duct wall.The section shape in hole 4 is rectangle or semicircle or other polygons.Pressure transducer 5 and temperature sensor 8 are housed on the wall in hole 4, and are connected with metering circuit 7 through lead 6 respectively.
When fluid flows through the hole, produce separation in the forward position 9 in hole, the shear layer of separation collides the back edge 3 in hole, in hole 4, is reflected back toward the forward position, has formed the disturbance to the fluid in forward position, and fluid continues to separate.This process is continuing along with flowing of fluid, thereby in the hole, produces vortex, the vibration of pressure cycle property.Measure the pressure transducer 5 of vortex frequency and the signal of temperature sensor 8 and be connected to metering circuit 7, can convert flow value the output of to normalized current signal through lead 6.Temperature value can be regulated measurement result.
Claims (3)
1. hole flowmeter; It is characterized in that: it comprises joint flange (1) and circulation duct (2); One hole (4) is arranged on the circulation duct wall, pressure transducer (5) and temperature sensor (8) are housed on it, and link to each other with metering circuit (7) through lead (6) respectively.
2. hole according to claim 1 flowmeter is characterized in that: said hole (4) section shape is rectangle or semicircle or other polygon.
3. hole according to claim 1 flowmeter is characterized in that: said hole (4) contain forward position (9) and edge, back (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201717189U CN202171476U (en) | 2011-05-26 | 2011-05-26 | Cavitation flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201717189U CN202171476U (en) | 2011-05-26 | 2011-05-26 | Cavitation flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202171476U true CN202171476U (en) | 2012-03-21 |
Family
ID=45829671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201717189U Expired - Fee Related CN202171476U (en) | 2011-05-26 | 2011-05-26 | Cavitation flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202171476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079056A1 (en) * | 2012-11-26 | 2014-05-30 | Lu Ming | Cavity flow meter |
-
2011
- 2011-05-26 CN CN2011201717189U patent/CN202171476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079056A1 (en) * | 2012-11-26 | 2014-05-30 | Lu Ming | Cavity flow meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20130526 |