CN103033222A - Super-minor-caliber three-diamond-type flowmeter - Google Patents

Super-minor-caliber three-diamond-type flowmeter Download PDF

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Publication number
CN103033222A
CN103033222A CN2011102985095A CN201110298509A CN103033222A CN 103033222 A CN103033222 A CN 103033222A CN 2011102985095 A CN2011102985095 A CN 2011102985095A CN 201110298509 A CN201110298509 A CN 201110298509A CN 103033222 A CN103033222 A CN 103033222A
Authority
CN
China
Prior art keywords
type flowmeter
diamond
super
edged type
mozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011102985095A
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Chinese (zh)
Inventor
黄�俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI ANRUI AUTOMATION INSTRUMENTATION CO Ltd
Original Assignee
SHANGHAI ANRUI AUTOMATION INSTRUMENTATION CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI ANRUI AUTOMATION INSTRUMENTATION CO Ltd filed Critical SHANGHAI ANRUI AUTOMATION INSTRUMENTATION CO Ltd
Priority to CN2011102985095A priority Critical patent/CN103033222A/en
Publication of CN103033222A publication Critical patent/CN103033222A/en
Pending legal-status Critical Current

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Abstract

The invention relates a super-minor-caliber three-diamond-type flowmeter. The super-minor-caliber three-diamond-type flowmeter is installed inside the surface body of a diversion pipe. Differential pressure division pipes are connected on the surface body of the diversion pipe. The three-diamond-type flowmeter is in a circular structure. The diameter of the three-diamond-type flowmeter is in accordance with the inner diameter of the surface body of the diversion pipe. A round hole is formed in the centre of the three-diamond-type flowmeter. Six round holes are symmetrically distributed around the round hole. A regular hexagon shape is formed by the six round holes. Compared with the prior art, the super-minor-caliber three-diamond-type flowmeter is compact in structure and skillful in design. Due to the fact that the rectification and the detection are combined into one, the accuracy and repeatability of a measurement are increased. The super-minor-caliber three-diamond-type flowmeter has the advantages of being wide in measuring range ratio, small in loss of pressure, abrasion resistant, long in service life, short in an installation straight pipe section and the like.

Description

A kind of super small-bore three-edged type flowmeter
Technical field
The present invention relates to the flow detection technical field, especially relate to a kind of super small-bore three-edged type flowmeter.
Background technology
Traditional difference in flow pressure device (claiming again restriction device) is for detection of fluid flow, although through very long evolution, in the regular period flow measurement be have ever made significant contribution, but it does not have fine solution measuring accuracy low all the time, the measurement range degree is narrow, easy to wear, crushing is large, the on-the-spot high series of problems that waits of straight length conditional request of installing, on particularly small-bore tiny flow quantity detects, tradition differential pressure flowmeter product still belongs to blank, and market is more and more higher to the requirement of small-caliber flow meter measurement tiny flow quantity, such as bio-pharmaceuticals, fine chemistry industry, research institutions, automobile industry Vehicular air flowmeter etc.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of measuring accuracy and repeatability of having improved in order to overcome the defective that above-mentioned prior art exists, and range ratio is wide, crushing is little, the super small-bore three-edged type flowmeter of wear-resistant, long service life.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of super small-bore three-edged type flowmeter, this flowmeter is installed in the mozzle table body, be connected with differential pressure minute pressure pipe on the mozzle table body, this three-edged type flow is counted circular configuration, diameter is consistent with the internal diameter of mozzle table body, and the center arranges a circular hole, is symmetrically distributed with six circular holes around the circular hole, these six circular holes consist of the regular hexagon shape, can effectively eliminate and weaken mobile interference source and make it be tending towards cmpletely state of development to bad vortex and the adjustment velocity flow profile that measuring instrument produces.
The diameter of described three-edged type flowmeter is consistent with the internal diameter of mozzle table body, comprises 4mm or 6mm.
Described three-edged type flowmeter can detect the differential pressure in upstream and each 25.4mm scope of downstream.
Described three-edged type flowmeter is installed in apart from the position of each 0-0.5D of front and back, flow disturbance source, and does not affect normal measurement, and wherein D is the internal diameter of mozzle table body.
A described differential pressure minute pressure pipe is provided with two, is separately positioned on the both sides of three-edged type flowmeter and is connected with mozzle table body.
Compared with prior art, the present invention combines flow rectification adjusting and flow measurement and makes extra small bore, this extra small bore three-edged type flow sensor compact conformation, design ingenious, rectification and detection are integrated, improved measuring accuracy and repeatability, had that range ratio is wide, crushing is little, an advantage such as wear-resistant, long service life and installation straight length are short.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is mounting structure schematic diagram of the present invention;
Fig. 3 be among Fig. 2 A-A to structural representation;
Fig. 4 is measuring principle figure of the present invention.
1 divides pressure pipe for differential pressure for mozzle table body, 4 for flange, 3 for circular hole, 2 for three-edged type flowmeter, 11 among the figure.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
A kind of super small-bore three-edged type flowmeter 1, its structure as shown in Figure 1, this flowmeter is installed in the mozzle table body 3, the two ends of mozzle table body 3 are equipped with flange 2, be connected with differential pressure minute pressure pipe 4 on the mozzle table body 3, differential pressure minute pressure pipe 4 is provided with two, is separately positioned on the both sides of three-edged type flowmeter 1 and is connected with mozzle table body 3.Shown in Fig. 2-3.Three-edged type flowmeter 1 is circular configuration, diameter is consistent with the internal diameter of mozzle table body 3, the center arranges a circular hole 11, be symmetrically distributed with six circular holes 11 around the circular hole 11, six circular holes 11 consist of the regular hexagon shape, can effectively eliminate and weaken mobile interference source and make it be tending towards cmpletely state of development to bad vortex and the adjustment velocity flow profile that measuring instrument produces.
The diameter of super small-bore three-edged type flowmeter 1 can reach 4mm or 6mm, this three-edged type flowmeter 1 can detect the differential pressure in upstream and each 25.4mm scope of downstream, be installed in apart from the position of each 0-0.5D of front and back, flow disturbance source, and do not affect normal measurement, wherein D is the internal diameter of mozzle table body.
The present invention changes a fluid circulating hole in the conventional throttle device into porous, and it is symmetrical that function is pressed in each hole, its restriction device is similar to three-edged type flow rectifier, can to greatest extent the flow field be rectified into perfect condition like this, flowing field stability is improved, therefore the on-the-spot actual measuring accuracy of using can improve 1-2 grade.More preferably, described porous function is symmetrical, has reduced the formation of eddy current, reduces turbulent skin friction, and kinetic energy rejection is reduced, and permanent crushing is low; More preferably, described three-edged type rectification restriction device can be effectively steady with the flow field adjustment, greatly shortened the requirement to straight length; More preferably, described porous function is symmetrical to have reduced eddy current formation, thereby greatly reduces the formation of being detained the dead band, and stain resistance is difficult for stifled.
Test philosophy figure of the present invention in Fig. 4, according to fluid mechanics Bernoulli equation and fluid continuity equation as can be known, when fluid during by mozzle table body 3, produces differential pressure in three-edged type flowmeter 1 front and back as shown in Figure 4, and the size of flow and differential pressure is shown below:
q m=K[(P +-P -)ρ] 1/2
In the formula: q mBe mass rate; K is instrument coefficient; P +-P -Be differential pressure; ρ is fluid density.
After realizing above-mentioned purpose, when this extra small bore three-edged type flow sensor was used for the flow detection of liquid, steam and gas of tiny flow quantity or metering, the key technical indexes was as follows:
Class of accuracy: 1.0
Repeatability: 0.3%
Caliber series: DN4, DN6
Measuring media: liquid, gas, steam
Medium temperature :≤450 ℃
Pressure medium :≤32Mpa
Environment temperature :-20 ℃-+55 ℃.

Claims (5)

1. super small-bore three-edged type flowmeter, this flowmeter is installed in the mozzle table body, be connected with differential pressure minute pressure pipe on the mozzle table body, it is characterized in that, this three-edged type flow is counted circular configuration, and diameter is consistent with the internal diameter of mozzle table body, and the center arranges a circular hole, be symmetrically distributed with six circular holes around the circular hole, these six circular holes consist of the regular hexagon shape.
2. a kind of super small-bore three-edged type flowmeter according to claim 1 is characterized in that, the diameter of described three-edged type flowmeter is consistent with the internal diameter of mozzle table body, comprises 4mm or 6mm.
3. a kind of super small-bore three-edged type flowmeter according to claim 1 is characterized in that, described three-edged type flowmeter can detect the differential pressure in upstream and each 25.4mm scope of downstream.
4. a kind of super small-bore three-edged type flowmeter according to claim 1 is characterized in that, described three-edged type flowmeter is installed in apart from the position of each 0-0.5D of front and back, flow disturbance source, and wherein D is the internal diameter of mozzle table body.
5. a kind of super small-bore three-edged type flowmeter according to claim 1 is characterized in that, a described differential pressure minute pressure pipe is provided with two, is separately positioned on the both sides of three-edged type flowmeter and is connected with mozzle table body.
CN2011102985095A 2011-09-30 2011-09-30 Super-minor-caliber three-diamond-type flowmeter Pending CN103033222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102985095A CN103033222A (en) 2011-09-30 2011-09-30 Super-minor-caliber three-diamond-type flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102985095A CN103033222A (en) 2011-09-30 2011-09-30 Super-minor-caliber three-diamond-type flowmeter

Publications (1)

Publication Number Publication Date
CN103033222A true CN103033222A (en) 2013-04-10

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Family Applications (1)

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CN2011102985095A Pending CN103033222A (en) 2011-09-30 2011-09-30 Super-minor-caliber three-diamond-type flowmeter

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CN (1) CN103033222A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004392A (en) * 2015-08-17 2015-10-28 成都国光电子仪表有限责任公司 Flowmeter throttling part beneficial for measurement accuracy
CN105136217A (en) * 2015-08-17 2015-12-09 成都国光电子仪表有限责任公司 Orifice plate structure beneficial to coaxiality of central hole and pipeline during installation process
CN105136218A (en) * 2015-08-17 2015-12-09 成都国光电子仪表有限责任公司 Orifice plate structure of orifice-plate flowmeter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201145593Y (en) * 2007-07-24 2008-11-05 刘建华 Multi-larynx type hole plate
CN201413165Y (en) * 2009-06-29 2010-02-24 刘建华 Multi-throat orifice plate
CN202274898U (en) * 2011-09-30 2012-06-13 上海安锐自动化仪表有限公司 Small-caliber flow meter of three-edged type structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201145593Y (en) * 2007-07-24 2008-11-05 刘建华 Multi-larynx type hole plate
CN201413165Y (en) * 2009-06-29 2010-02-24 刘建华 Multi-throat orifice plate
CN202274898U (en) * 2011-09-30 2012-06-13 上海安锐自动化仪表有限公司 Small-caliber flow meter of three-edged type structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邵朋诚: "一种小口径流量测量装置-内藏孔板", 《炼油化工自动化》, no. 4, 29 August 1991 (1991-08-29) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004392A (en) * 2015-08-17 2015-10-28 成都国光电子仪表有限责任公司 Flowmeter throttling part beneficial for measurement accuracy
CN105136217A (en) * 2015-08-17 2015-12-09 成都国光电子仪表有限责任公司 Orifice plate structure beneficial to coaxiality of central hole and pipeline during installation process
CN105136218A (en) * 2015-08-17 2015-12-09 成都国光电子仪表有限责任公司 Orifice plate structure of orifice-plate flowmeter

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Application publication date: 20130410