CN101334302B - Heavy caliber electromagnetic vortex sjeddomg flowmeter - Google Patents
Heavy caliber electromagnetic vortex sjeddomg flowmeter Download PDFInfo
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- CN101334302B CN101334302B CN2007100433050A CN200710043305A CN101334302B CN 101334302 B CN101334302 B CN 101334302B CN 2007100433050 A CN2007100433050 A CN 2007100433050A CN 200710043305 A CN200710043305 A CN 200710043305A CN 101334302 B CN101334302 B CN 101334302B
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Abstract
The invention discloses a large-caliber magnetoelectric vortex shedding flowmeter which comprises a large-caliber sounding pipe and a small-caliber magnetoelectric vortex shedding flowmeter and is characterized in that the small-caliber magnetoelectric vortex shedding flowmeter is inserted into the large-caliber sounding pipe. The caliber of the large-caliber magnetoelectric vortex shedding flowmeter of the invention can achieve DN600 at most, even larger. Under the situation of the same caliber and flow speed, compared with the original magnetoelectric vortex shedding flowmeter, the flowmeter of the invention can release with high frequency and strong signals, that is, the novel flowmeter has the advantages of high measuring accuracy, low measurement lower limit, and short straight pipe sections installed at the front and the back; under the premise of guaranteeing the sounding pipes with the same specification are interchangeable (guaranteeing that the sounding pipe used for detection and the sounding pipe of a user are consistent), and under the situation of keeping the direction of installing the small-caliber sensor to be consistent, the core part of the small-caliber sensor is returned to the OEM or the monitoring and managing department, thus solving the problem of the difficult sending for detection of the large-caliber magnetoelectric vortex shedding flowmeter and greatly reducing the assembly and disassembly cost of the sending for detection.
Description
Technical field
The present invention relates to a kind of vortex shedding flow meter, particularly a kind of utilization " toll bar " vortex street principle and Faradic electricity magnetic induction principle design, and are used for measuring the heavy caliber electromagnetic vortex sjeddomg flowmeter of conductive fluid medium.Can be widely used in the metering of field conducting liquid flows such as industries such as oil, chemical industry, metallurgy, weaving, food, pharmacy, papermaking and environmental protection, municipal plumbing, water conservancy construction, river dredging.
Background technology
Electromagnetic vortex sjeddomg flowmeter is the same with other vortex shedding flow meter, is to utilize " toll bar " vortex street principle, is different from the piezoelectric type detection mode of most of vortex shedding flow meters now, the vortex shedding flow meter that adopts induction novel detection mode to form.When conducting medium flows through triangulo column 10 with certain speed, produce a vortex band of alternately arranging in back, triangulo column 10 both sides, be referred to as " toll bar vortex ", upper and lower magnet 11,12 in the encapsulating housing produces magnetic field because of the alternately effect of vortex, produce the charge signal of the frequency identical with vortex at electrode 9 ends, after delivering to that converter is intelligent and handle by cable, realize demonstration and the communication between data on flows and the microsystem and the control (schematic diagram is seen Fig. 1) of transient liquid flow, integrated flux.
Because this product has been taken into account every advantage of traditional vortex shedding flow meter, overcome the shortcoming of original product resistance to shock difference simultaneously, particularly all be greatly improved aspect the critical natures such as its flow detection scope, measuring accuracy, measurement lower limit, the now existing development trend that replaces the water meter of traditional sense, market outlook are boundless.But heavy caliber electromagnetic vortex sjeddomg flowmeter, 10 width d are big because of triangulo column, magnet distance between the upper and lower magnet 11,12 is far away, little with respect to small-bore frequency under same flow condition, it is big especially promptly to discharge each frequency representative flow, shortcomings such as so heavy caliber electromagnetic vortex sjeddomg flowmeter must have signal difference, and accuracy of detection is low.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of heavy caliber electromagnetic vortex sjeddomg flowmeter, and is low to solve existing heavy caliber electromagnetic vortex sjeddomg flowmeter accuracy of detection, shortcomings such as signal difference.
Technical matters to be solved by this invention can be achieved through the following technical solutions:
Heavy caliber electromagnetic vortex sjeddomg flowmeter comprises footpath at a gulp measuring tube and small-bore electromagnetic vortex sjeddomg flowmeter, it is characterized in that, small-bore electromagnetic vortex sjeddomg flowmeter is inserted in the heavy caliber measuring tube.
In order to make the liquid in the small flowmeter of flowing through not produce fluctuation, in the present invention, install a mozzle additional at the front end of the little measuring tube of described small-bore electromagnetic vortex sjeddomg flowmeter.
Described mozzle is straight pipe or is reducer pipe.When mozzle adopts reducer pipe, when detecting, can reduce flux lower limit, improve the measuring accuracy of flowmeter.
The little measuring tube of described small-bore electromagnetic vortex sjeddomg flowmeter is provided with a last arm that is connected as a single entity with it and a lower magnet mounting pipe, on described, be equipped with in the arm small-bore electromagnetic vortex sjeddomg flowmeter on magnet, electrode, the described arm of going up is connected with the joint flange of heavy caliber measuring tube by small-bore electromagnetic vortex sjeddomg flowmeter; Be provided with the lower branch line that is connected as a single entity with it in described heavy caliber measuring tube, be rotary with a set nut on the described lower branch line, this lower branch line is connected with the lower magnet mounting pipe by a direction fixed pin, in described lower magnet mounting pipe lower magnet is installed.
Because of necessarily needing promise to count the release frequency f of vortex in the scope and head-on concerning between the width d of flow rate of fluid V and vortex generation body, available following formula is expressed:
f＝Sr·V/d
V＝f·d/Sr
Q＝3600×f/K
The release frequency V-flow velocity of f-toll bar vortex
D-triangulo column width S r-coefficient (being called Strouhal number)
Q-measuring tube inner fluid flow K-instrument coefficient
So, from above-mentioned expression formula, can know, in same pipeline during identical flow velocity (flow), as triangular prism fluoran stream surface width d value is diminished, the f value is corresponding can to become big, the magnet that furthered simultaneously reaches the distance between magnet and the electrode tip each other, and the signal amplitude value of the frequency f that is produced is big, and promptly signal is strengthened.
From structure of the present invention, can know, the manufacturer that originally can produce the above electromagnetic vortex sjeddomg flowmeter of bore DN200 is very little, it is also few to produce bore DN300 producer, adopt the heavy caliber electromagnetic vortex sjeddomg flowmeter bore of structure of the present invention to reach as high as DN600 now, even can do more; Because flowmeter of the present invention is under the same flow rate conditions of same bore, compare with original electromagnetic vortex sjeddomg flowmeter, can discharge, frequency height, signal strong, promptly this new flowmeter has that measuring accuracy height, measurement lower limit are low, front and back install advantages such as flow development length is short; Guaranteeing (guaranteeing to detect gets consistent with measuring tube with user's measuring channel) under the interchangeable prerequisite of same specification measuring tube, and keep installing under the situation of its small-bore sensor position direction unanimity, its small-bore Sensor core partly can be returned former factory or monitoring management department, can solve heavy caliber electromagnetic vortex sjeddomg flowmeter and inspect difficult problem by ready samples, and greatly reduce in the censorship and must mount and dismount expense.
Description of drawings
Fig. 1 is the electromagnetic vortex sjeddomg flowmeter schematic diagram.
Fig. 2 is the general structural representation of existing electromagnetic vortex sjeddomg flowmeter.
Fig. 3-1 is the structural representation of heavy caliber electromagnetic vortex sjeddomg flowmeter of the present invention.
Fig. 3-2 is the A place enlarged diagram of Fig. 3-1.
Be labeled as among the figure: 1 is signal processing converter, and 2 is signal wire, and 3 is nut, 4 is last arm pressing plate, 5 is insulation sleeve, and 6 is set nut, and 7,8 is insulating mat, 9 is electrode, 10 is triangulo column, and 11 is last magnet, and 12 is lower magnet, 13 is little measuring tube, 14 is big measuring tube, and 15 is mozzle, and 16 is lower branch line, 17 is last arm, 18 is the direction fixed pin, and 19 is set nut, and 20 is the lower magnet mounting pipe, 21 is the joint flange of small-bore electromagnetic vortex sjeddomg flowmeter, and 22 is the joint flange of heavy caliber measuring tube.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Fig. 2 is the general structural representation of existing electromagnetic vortex sjeddomg flowmeter, mainly contains the compositions such as signal wire 2 of little measuring tube 13, triangulo column 11, last magnet 10, lower magnet 12, electrode 9, insulating mat 7 and 8, the set nut 6 that compresses electrode 9 usefulness, insulation sleeve 5, nut 3, signal processing converter 1, access signal processing converter 1.
Referring to the heavy caliber electromagnetic vortex sjeddomg flowmeter of Fig. 3-1 and Fig. 3-2, comprise footpath at a gulp measuring tube 14 and small-bore electromagnetic vortex sjeddomg flowmeter, small-bore electromagnetic vortex sjeddomg flowmeter is inserted in the heavy caliber measuring tube 14.Concrete mounting means is that the joint flange 22 with the joint flange 21 of small-bore electromagnetic vortex sjeddomg flowmeter and heavy caliber measuring tube is connected by screw bolt and nut and gets final product.
In order to make the liquid in the small flowmeter of flowing through not produce fluctuation, install a mozzle 15 additional at the front end of the little measuring tube 13 of small-bore electromagnetic vortex sjeddomg flowmeter.Mozzle 15 is straight pipe or is reducer pipe.The mozzle 15 of present embodiment adopts reducer pipe, can reduce flux lower limit when detecting, and improves the measuring accuracy of flowmeter.
In little measuring tube 13, triangulo column 10 is installed, and this little measuring tube 13 be provided with one be connected as a single entity with it on arm 17 and lower magnet mounting pipe 20, the top of last arm 17 is installed on the joint flange 21 of small-bore electromagnetic vortex sjeddomg flowmeter by last arm pressing plate 4 and securing member.By nut 3, set nut 6, insulation sleeve 5, insulating mat 7,8 magnet 11 and electrode 9 are installed in last arm 17, the measuring head of electrode 9 is inserted in the little measuring tube 13.
Adopt the heavy caliber electromagnetic vortex sjeddomg flowmeter of Fig. 3-1, the core component of its detection (sensor) is smaller, can easily its extraction be returned the censorship of former factory or detection department, the present invention is guaranteeing on big measuring tube 14 of user and the consistent basis of detection with big measuring tube 14, made a large amount of commutativitys, comparative tests, its accuracy of detection unitarity reaches more than 98%, realize a heavy caliber censorship difficult problem very easily, this invention is compared with former electromagnetic vortex sjeddomg flowmeter, has the frequency of detection height, characteristics such as signal is strong, promptly has the measuring accuracy height simultaneously, measurement lower limit is low, characteristics such as flow development length weak point are installed in front and back, be particularly suitable for the metering of large diameter pipeline flow, can realize expanding to more bigbore electromagnetic vortex sjeddomg flowmeter.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. heavy caliber electromagnetic vortex sjeddomg flowmeter comprises footpath at a gulp measuring tube and small-bore electromagnetic vortex sjeddomg flowmeter, it is characterized in that, small-bore electromagnetic vortex sjeddomg flowmeter is inserted in the heavy caliber measuring tube; Front end at the little measuring tube of described small-bore electromagnetic vortex sjeddomg flowmeter installs a mozzle additional; Described mozzle is a reducer pipe; In little measuring tube, triangulo column is installed, and this little measuring tube be provided with one be connected as a single entity with it on arm and lower magnet mounting pipe, the top of last arm is installed on the joint flange of small-bore electromagnetic vortex sjeddomg flowmeter by last arm pressing plate and securing member, by nut, set nut, insulation sleeve, insulating mat magnet and electrode are installed in last arm, the measuring head of electrode is inserted in the little measuring tube; In the lower magnet mounting pipe lower magnet is installed, lower branch line and heavy caliber measuring tube are connected as a single entity, and lower branch line top has external thread, is rotary with set nut on this external thread, and set nut is locking upwards; The upper end direction of passage fixed pin of lower branch line is connected with the lower magnet mounting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100433050A CN101334302B (en) | 2007-06-29 | 2007-06-29 | Heavy caliber electromagnetic vortex sjeddomg flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100433050A CN101334302B (en) | 2007-06-29 | 2007-06-29 | Heavy caliber electromagnetic vortex sjeddomg flowmeter |
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| CN101334302A CN101334302A (en) | 2008-12-31 |
| CN101334302B true CN101334302B (en) | 2011-03-16 |
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| CN2007100433050A Active CN101334302B (en) | 2007-06-29 | 2007-06-29 | Heavy caliber electromagnetic vortex sjeddomg flowmeter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154960A (en) * | 2014-08-01 | 2014-11-19 | 衢州市鼎盛化工科技有限公司 | Hall-effect large-diameter pipeline flowmeter |
| CN105953082B (en) * | 2016-06-15 | 2018-02-23 | 浙江师范大学 | A kind of self-powered oil-gas pipeline monitoring device |
Citations (5)
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|---|---|---|---|---|
| CN2569105Y (en) * | 2002-07-23 | 2003-08-27 | 李吉男 | Vortex street generating body integrated inserting vortes street flowmeter |
| CN2600792Y (en) * | 2003-02-28 | 2004-01-21 | 詹益鸿 | Dismountable integral electromagnetic vortex flowmeter |
| CN1831487A (en) * | 2006-04-06 | 2006-09-13 | 滁州市金科仪器仪表有限公司 | Magnetic vortex street flowmeter |
| CN2839978Y (en) * | 2005-11-01 | 2006-11-22 | 深圳市众恒测控技术有限公司 | Vortex type electromagnetic flowmeter |
| CN201081746Y (en) * | 2007-06-29 | 2008-07-02 | 上海星空自动化仪表有限公司 | Magnetoelectric vortex shedding flow meter |
-
2007
- 2007-06-29 CN CN2007100433050A patent/CN101334302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569105Y (en) * | 2002-07-23 | 2003-08-27 | 李吉男 | Vortex street generating body integrated inserting vortes street flowmeter |
| CN2600792Y (en) * | 2003-02-28 | 2004-01-21 | 詹益鸿 | Dismountable integral electromagnetic vortex flowmeter |
| CN2839978Y (en) * | 2005-11-01 | 2006-11-22 | 深圳市众恒测控技术有限公司 | Vortex type electromagnetic flowmeter |
| CN1831487A (en) * | 2006-04-06 | 2006-09-13 | 滁州市金科仪器仪表有限公司 | Magnetic vortex street flowmeter |
| CN201081746Y (en) * | 2007-06-29 | 2008-07-02 | 上海星空自动化仪表有限公司 | Magnetoelectric vortex shedding flow meter |
Non-Patent Citations (2)
| Title |
|---|
| 韩健.大口径插入式涡街流量变送器测量方法及仪表常数的确定方法.城市管理与科技12 2.1996,12(2),37-40. |
| 韩健.大口径插入式涡街流量变送器测量方法及仪表常数的确定方法.城市管理与科技12 2.1996,12(2),37-40. * |
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