CN2602348Y - Electromagnetic swirl flowmeater - Google Patents
Electromagnetic swirl flowmeater Download PDFInfo
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- CN2602348Y CN2602348Y CN 03223949 CN03223949U CN2602348Y CN 2602348 Y CN2602348 Y CN 2602348Y CN 03223949 CN03223949 CN 03223949 CN 03223949 U CN03223949 U CN 03223949U CN 2602348 Y CN2602348 Y CN 2602348Y
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- magnet
- detecting electrode
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- electrode
- swirl
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Abstract
The utility model relates to an electromagnetic swirl flow meter which comprises a fluid pipeline, a swirl generating body, a magnet, a detecting electrode and a flow reckoning displaying instrument, wherein the detecting electrode is arranged outside the fluid pipeline behind the swirl generating body, the magnet and the electrode are arranged on the same side of the pipeline wall, or the magnet and the detecting electrode are respectively arranged on both sides of the pipeline wall. When the magnet and the electrode are arranged on the same side of the pipeline wall, the electrode passes through the through hole of the magnet and the pipeline wall and extends into fluid; when the magnet and the electrode are respectively arranged on both sides of the pipeline wall, the magnet and the detecting electrode are on the same central axial cord, and the electrode passes through the pipeline wall and extends into the fluid. The upper part of the detecting electrode is provided with an insulator which isolates electrically the electrode and the magnet or the wall of the fluid pipeline, the revealed part of the lower end of the detecting electrode is electrically contacted with the fluid, and the detecting electrode sends the detected signal to the flow reckoning displaying instrument. Compared with the prior art, the utility model has the advantages of simple structure, high metering precision, wide adaptive scope of pipe diameter, strong vibration resistance, good anti-high pressure performance and high cost performance.
Description
Technical field the utility model relates to flow measurement device, particularly relates to the flowmeter that is used for measuring the conductive fluid flow that utilizes Karman vortex street principle and Faraday's electromagnetic induction law design.Can be widely used in supplying water, the measurement and the control of industry fluid flow such as wastewater treatment, oil, chemical industry, metallurgy.
When background technology is inserted the cylinder in axis blunt form cross section vertical with direction of flow in the fluid that flows (vortex generation body), will produce inward turning and the interlaced vortex row of two rows in its downstream, the cross frequence of vortex is directly proportional with post side liquid flow velocity in the certain flow scope.The cross frequence that detects eddy current can calculate flow rate of fluid and flow, and this is the vortex shedding flow meter that adopts the Karman vortex street principle to form usually.Magnetic field is set around conductive fluid, and conductive fluid cutting magnetic line in magnetic field produces electromotive force, calculates the flow velocity of detected fluid with this, and this is the electromagnetic flowmeter that adopts Faraday's electromagnetic induction law to form.At present, vortex shedding flow meter and electromagnetic flowmeter have become the ripe product of technology, have been applied to the measurement of fluid.Vortex shedding flow meter is poor anti jamming capability in application, and measuring accuracy and accuracy are difficult to improve.Though electromagnetic flowmeter precision height, big caliber costs an arm and a leg, and range of application is limited.
The summary of the invention the technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of advantage that merges electromagnetic flowmeter and vortex shedding flow meter, strong, the big low electromagnetism swirl flowmeter of caliber price of antijamming capability in promptly using, according to the cross frequence of Karman vortex street principle and Faraday's electromagnetic induction law detection vortex, realize the flow measurement of conductive fluid.
Technical matters of the present utility model can be by realizing by the following technical solutions:
Design, a kind of electromagnetism swirl flowmeter of making, comprise vortex generation body, magnet and the detecting electrode and the flow accumulation display instrument that place fluid line, described vortex generation body is perpendicular to the axis of fluid line, described detecting electrode and described magnet place on this vortex generation body duct wall afterwards, and described magnet and detecting electrode have same central axis; Described detecting electrode is parallel with described vortex generation body, it passes through described duct wall and stretches in the fluid of described vortex generation body back, insulator is arranged at described detecting electrode top, its lower end exposed portions serve and fluid electrically contacts and detection signal is delivered to described flow accumulation display instrument.
Compared with prior art, the utility model electromagnetism swirl flowmeter has following technique effect: this flowmeter structure is simple, overcome the shortcoming of conventional vortex shedding flow meter and electromagnetic flowmeter, the characteristics that have the measuring accuracy height, adapt to the caliber wide ranges, freedom from vibration are strong, barotolerance good and cost performance is high.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the utility model electromagnetism swirl flowmeter, and described detecting electrode 4 and magnet 2 place the homonymy of fluid line 1, and detecting electrode 4 passes the through hole of magnet 2;
Fig. 2 is the structural representation of second embodiment of the utility model electromagnetism swirl flowmeter, and described detecting electrode and magnet are arranged at the fluid line both sides respectively;
Fig. 3 is the synoptic diagram of the magnet 2 of described electromagnetism swirl flowmeter; Fig. 3-the 1st wherein, magnet 2 be shaped as columniform synoptic diagram; Fig. 3-the 2nd, the synoptic diagram that is shaped as rectangular cylinder of magnet 2;
Fig. 4 is the synoptic diagram of the detecting electrode 4 of described electromagnetism swirl flowmeter, Fig. 4-the 1st wherein, detecting electrode 4 be shaped as columniform synoptic diagram; Fig. 4-the 2nd, the synoptic diagram that is shaped as rectangular cylinder of detecting electrode 4.
Embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
The utility model embodiment one comprises vortex generation body 5, magnet 2, detecting electrode 4 and flow accumulation display instrument 8 in the fluid line 1 as shown in Figure 1.In vortex generation body 5 back perpendicular to described fluid line 1 axis, with vortex generation body 5 detecting electrode 4 that be arranged in parallel, in the fluid line wall outside 11 magnet 2 is set, described magnet 2 is permanent magnet or calutron, be shaped as cylindrical or rectangular cylinder, see shown in Figure 3, described detecting electrode 4 passes the through hole 21 and the duct wall 11 of the magnet 2 that places on the duct wall 11 and stretches into the fluid of described vortex generation body 5 back, detecting electrode 4 tops have insulator 3 that this detecting electrode 4 and magnet 2 and duct wall 11 electricity are isolated, and detecting electrode 4 lower end exposed portions serve and fluid electrically contact.Vortex generation body 5 makes the fluid that flows through produce two row's inward turning and interlaced eddy current, and the generated frequency of eddy current is directly proportional with flow rate of fluid.The magnetic line of force of conducting fluids eddy current cutting magnet 2, just with detecting electrode 4 that fluid becomes to electrically contact on produce electrical signal of reaction, the frequency of electric signal is exactly the eddy current frequency, detecting electrode is delivered to flow accumulation display instrument 8 with the electric signal that detects, sampling eddy current frequency just can be measured flow rate of fluid and flow.
Present embodiment electromagnetism swirl flowmeter, detecting electrode 4 pass the through hole of the magnet 2 that places on the duct wall 1, and detecting electrode 4 can be lacked as far as possible, therefore flow measurement can not be subjected to the restriction of caliber size, and low flow speed characteristic is good, measures reliable and stable, in big caliber application scenario, cost performance is higher.
Embodiment two of the present utility model comprises vortex generation body 5, magnet 2, detecting electrode 4 and flow accumulation display instrument 8 in the fluid line 1 as shown in Figure 2.In vortex generation body 5 back perpendicular to the fluid line axis, detecting electrode 4 be arranged in parallel, described detecting electrode 4 passes duct wall 11 and stretches in the fluid of described vortex generation body 5 back, described detecting electrode 4 tops have insulator 3 that this detecting electrode 4 and magnet 2 and duct wall 11 electricity are isolated, and detecting electrode 4 lower end exposed portions serve and fluid electrically contact.Magnet 2 is set on the opposite side of duct wall 11, and described magnet 2 is permanent magnet or calutron, exterior contour be shaped as cylindrical or rectangular cylinder, as shown in Figure 3, but do not have a through hole in the middle of it; The center of magnet 2 and detecting electrode 4 are on same straight line, and vortex generation body 5 makes the fluid that flows through produce two row's inward turning and interlaced eddy current, and the generated frequency of eddy current is directly proportional with flow rate of fluid.The magnetic line of force of conducting fluids eddy current cutting magnet 2, just with detecting electrode 4 that fluid becomes to electrically contact on produce electrical signal of reaction, the frequency of electric signal is exactly the eddy current frequency, detecting electrode is delivered to flow accumulation display instrument 8 with the electric signal that detects, sampling eddy current frequency just can be measured flow rate of fluid and flow.
Present embodiment electromagnetism swirl flowmeter, detecting electrode 4 places fluid line 1 both sides respectively with magnet 2, can be applicable to measure the less occasion of caliber, and low flow speed characteristic is good, measures reliable and stable.
Magnet 2 described in the utility model is permanent magnet or calutron, and its N, the S utmost point are perpendicular to the axis of described fluid line 1.Described detecting electrode 4 is a solid cylinder, and it is shaped as cylindrical or rectangular cylinder, sees shown in Figure 4.Described flow accumulation display instrument 8 is fixed on the described fluid line 1.
Claims (9)
1. an electromagnetism swirl flowmeter comprises vortex generation body (5), magnet (2) and the detecting electrode (4) and the flow accumulation display instrument (8) that place fluid line (1), it is characterized in that:
Described vortex generation body (5) is perpendicular to the axis of fluid line (1), and described detecting electrode (4) and described magnet (2) place on this vortex generation body (5) duct wall (11) afterwards, and described magnet (2) has same central axis with detecting electrode (4);
Described detecting electrode (4) is parallel with described vortex generation body (5), it passes through described duct wall (11) and stretches in the fluid of described vortex generation body (5) back, insulator (3) is arranged at described detecting electrode (4) top, its lower end exposed portions serve and fluid electrically contacts and detection signal is delivered to described flow accumulation display instrument (8).
2. electromagnetism swirl flowmeter as claimed in claim 1, it is characterized in that: be provided with through hole (21) in the middle of the described magnet (2), described detecting electrode (4) passes through this through hole (21) and described duct wall (11) and stretches in the fluid of described vortex generation body (5) back, and described insulator (3) is isolated this detecting electrode (4) and magnet (2) and duct wall (11) electricity.
3. electromagnetism swirl flowmeter as claimed in claim 1 is characterized in that: described magnet (2) and detecting electrode (4) are arranged at the both sides of described duct wall (11) respectively, and described insulator (3) is isolated detecting electrode (4) and duct wall (11) electricity.
4. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: described magnet (2) be shaped as right cylinder or rectangular cylinder.
5. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: described detecting electrode (4) is a solid cylinder.
6. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: described detecting electrode (4) be shaped as right cylinder or rectangular cylinder.
7. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: described magnet (2) is permanent magnet or calutron.
8. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: the N of described magnet (2), the S utmost point are perpendicular to the axis of described fluid line (1).
9. as claim 2 or 3 described electromagnetism swirl flowmeters, it is characterized in that: described flow accumulation display instrument (8) is fixed on the described fluid line (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03223949 CN2602348Y (en) | 2003-02-28 | 2003-02-28 | Electromagnetic swirl flowmeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03223949 CN2602348Y (en) | 2003-02-28 | 2003-02-28 | Electromagnetic swirl flowmeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2602348Y true CN2602348Y (en) | 2004-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03223949 Expired - Fee Related CN2602348Y (en) | 2003-02-28 | 2003-02-28 | Electromagnetic swirl flowmeater |
Country Status (1)
| Country | Link |
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| CN (1) | CN2602348Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404851C (en) * | 2005-09-16 | 2008-07-23 | 清华大学 | Electromagnetic eddy inhibitor for draft tube of mixed flow water turbine |
| CN103913197A (en) * | 2014-03-19 | 2014-07-09 | 哈尔滨工程大学 | Deformed-section electromagnetic vortex-shedding flowmeter with bionic features |
| CN104266688A (en) * | 2014-10-22 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | High-accuracy electromagnetic eddy flow meter |
| CN103900645B (en) * | 2014-03-28 | 2017-01-11 | 哈尔滨工程大学 | Inserting electromagnetic vortex shedding flowmeter |
-
2003
- 2003-02-28 CN CN 03223949 patent/CN2602348Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404851C (en) * | 2005-09-16 | 2008-07-23 | 清华大学 | Electromagnetic eddy inhibitor for draft tube of mixed flow water turbine |
| CN103913197A (en) * | 2014-03-19 | 2014-07-09 | 哈尔滨工程大学 | Deformed-section electromagnetic vortex-shedding flowmeter with bionic features |
| CN103900645B (en) * | 2014-03-28 | 2017-01-11 | 哈尔滨工程大学 | Inserting electromagnetic vortex shedding flowmeter |
| CN104266688A (en) * | 2014-10-22 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | High-accuracy electromagnetic eddy 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: 20040204 Termination date: 20110228 |