CN105043448A - Large-caliber middle-high velocity flow velocity meter - Google Patents

Large-caliber middle-high velocity flow velocity meter Download PDF

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Publication number
CN105043448A
CN105043448A CN201510491815.9A CN201510491815A CN105043448A CN 105043448 A CN105043448 A CN 105043448A CN 201510491815 A CN201510491815 A CN 201510491815A CN 105043448 A CN105043448 A CN 105043448A
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China
Prior art keywords
rectangular tube
pipe
flow velocity
high velocity
measuring channel
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CN201510491815.9A
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Chinese (zh)
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CN105043448B (en
Inventor
唐力南
李舸
景兆才
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YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD)
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YINCHUAN RONGSHENWEI AUTOMATION INSTRUMENT FACTORY (CO LTD)
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Abstract

The invention relates to a flow measuring device, in particular, a large-caliber middle-high velocity flow velocity meter. The large-caliber middle-high velocity flow velocity meter comprises a measuring pipeline. The large-caliber middle-high velocity flow velocity meter is characterized in that four rectangular pipe generators are distributed in the measuring pipeline; each rectangular pipe generator is provided with a positive pressure tapping pipe and a negative pressure tapping pipe; and the positive pressure tapping pipes and the negative pressure tapping pipes of the four rectangular pipe generators are connected together through a circular pipe. The large-caliber middle-high velocity flow velocity meter of the invention is unique in structure. With the large-caliber middle-high velocity flow velocity meter adopted, pressure loss can be reduced, and measurement accuracy can be improved, and installation and maintenance can be facilitated.

Description

High flow rate flowmeter in a kind of heavy caliber
Technical field
The present invention relates to a kind of flow measurement device, especially relate to high flow rate flowmeter in a kind of heavy caliber.
Background technology
In present differential-pressure instrumentation field of flow measurement, in heavy caliber when high flow rate, generally mainly contain two kinds of mounting meanss; A: with the flowmeter being covered with whole pipeline of pipeline welding or Flange joint, such as hyperboloid balance flow gauge application number: CN200910265096, the applying date: 2009.12.31, open (bulletin) number: CN101750121A, applicant (patentee): Shanghai Keyontechs Development Co., Ltd., inventor: all people).B: punch on duct wall and be then inserted into pipe interior, such as internal-mounted combined type Venturi nozzle throttle mechanism: application number: CN20100547011, the applying date: 2010.11.17, open (bulletin) number: CN102042853A, applicant: Zhongwang Flow Instrument Co., Ltd., Xi'an City, inventor: Huan is newly empty.Comparatively speaking the mounting means of a brings the raising of measuring accuracy, and it is larger that the corresponding pressure loss becomes, and relatively more serious to the waste of the energy, although the mounting means of b reduces the pressure loss, but the precision measured have dropped relatively.For this reason existing commercially also do not have a kind of instrument to reduce the pressure loss, can improve measuring accuracy again.
Summary of the invention
The object of the invention is the defect overcoming prior art, a kind of structure uniqueness is provided, the pressure loss can be reduced, improves measuring accuracy, is convenient to high flow rate flowmeter in a kind of heavy caliber of installation and maintenance.
The present invention realizes in the following way:
High flow rate flowmeter in a kind of heavy caliber, it comprises measuring channel, it is characterized in that: in measuring channel, be furnished with four rectangular tube generators, each rectangular tube generator is equipped with positive pressure pipe and negative pressure pipe, positive pressure pipe and the negative pressure pipe of four rectangular tube generators are coupled together by a pipe;
The pipeline center of described four rectangular tube generators is just in time on average arranged on the anchor ring such as grade of described measuring channel;
In described rectangular tube generator, α is 45 °, and β is 14 °, H=0.4D, and wherein D is the internal diameter of measuring channel.
The present invention has following effect:
1) structure is unique: flowmeter provided by the invention it comprise measuring channel, it is characterized in that: in measuring channel, be furnished with four rectangular tube generators, each rectangular tube generator is equipped with positive pressure pipe and negative pressure pipe, positive pressure pipe and the negative pressure pipe of four rectangular tube generators are coupled together by a pipe; Determine experimental study find when the fluid in flow field flows through the built-in rectangular flow gauge of high flow rate in heavy caliber by real failing to be sold at auction, a pressure differential is produced before and after it, there is certain funtcional relationship in this pressure differential and flow, by pressure port, the differential pressure signal that built-in for high flow rate in heavy caliber rectangular flow gauge produces in flow field is detected, be then converted into the flow in practical flow field by funtcional relationship.
2) pressure loss can be reduced, improve measuring accuracy: flowmeter provided by the invention is inside measuring channel, a rectangular tubular generator is installed, due to the rectangular configuration of rectangular tubular generator, by regulating α, β angle and height H in rectangular tubular generator, α, β, H make reducing of the middle part circulation area gradual change of rectangular tubular generator, along with reducing of circulation area, make the increase of flow field medium flow velocity, thus flow field Reynolds number is promoted, the precision measured is improved.Compared with instrument existing on market, in heavy caliber, the built-in rectangular flow gauge of high flow rate passes through the increase of measuring point and uses rectangular tube signal generator, thus improves the precision of heavy caliber measurement, reduces the pressure loss of differential-pressure instrumentation in measuring process.
3) installation and maintenance is convenient to: flowmeter provided by the invention arranges four rectangular tube generators by the mode of welding in measuring channel, the pipeline center of four rectangular tube generators is just in time on average arranged on the anchor ring such as grade of pipeline, the positive and negative pressure port of four rectangular tube generators is coupled together by the pipe of φ 25.4, then pressure pipe is received transmitter, then read flow.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is Fig. 1 left view of the present invention.
Embodiment
High flow rate flowmeter in a kind of heavy caliber, it comprises measuring channel 3, as illustrated in fig. 1 and 2: in measuring channel 3, be furnished with four rectangular tube generators 5, the positive pressure pipe 1 and the negative pressure pipe 2 that each rectangular tube generator 5 are equipped with positive pressure pipe 1 and negative pressure pipe 2, four rectangular tube generators 5 are coupled together by a pipe 6.
The pipeline center of described four rectangular tube generators 5 is just in time on average arranged in waiting on anchor ring of described measuring channel 5.
In described rectangular tube generator 5, α is 45 °, and β is 14 °, and 4 wedge height H are 0.4D, and wherein D is the internal diameter of measuring channel 3.The height that α is wedge angle of throat, β wedge spread angle, H are the high both wedges of wedge.

Claims (3)

1. high flow rate flowmeter in a heavy caliber, it comprises measuring channel (3), it is characterized in that: in measuring channel (3), be furnished with four rectangular tube generators (5), each rectangular tube generator (5) is equipped with positive pressure pipe (1) and negative pressure pipe (2), positive pressure pipe (1) and the negative pressure pipe (2) of four rectangular tube generators (5) are coupled together by a pipe (6).
2. high flow rate flowmeter in a kind of heavy caliber as claimed in claim 1, is characterized in that: the pipeline center of described four rectangular tube generators (5) is just in time on average arranged in waiting on anchor ring of described measuring channel (3).
3. high flow rate flowmeter in a kind of heavy caliber as claimed in claim 1, is characterized in that: in described rectangular tube generator (5), α is 45 °, and β is 28 °, H=0.4D, and wherein D is the internal diameter of measuring channel (5).
CN201510491815.9A 2015-08-12 2015-08-12 High flow rate flowmeter in a kind of heavy caliber Active CN105043448B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510491815.9A CN105043448B (en) 2015-08-12 2015-08-12 High flow rate flowmeter in a kind of heavy caliber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510491815.9A CN105043448B (en) 2015-08-12 2015-08-12 High flow rate flowmeter in a kind of heavy caliber

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CN105043448A true CN105043448A (en) 2015-11-11
CN105043448B CN105043448B (en) 2017-06-16

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2144043A1 (en) * 2008-07-08 2010-01-13 Surpass Industry Co., Ltd. Differential-pressure flow meter and flow-rate controller
CN201392216Y (en) * 2009-04-30 2010-01-27 沈阳聚焦科技有限公司 Energy-saving differential pressure flowmeter
CN201476819U (en) * 2009-07-29 2010-05-19 银川融神威自动化仪表厂(有限公司) Balanced-type V-shaped cone flow meter
CN203069216U (en) * 2012-12-26 2013-07-17 江阴市神州测控设备有限公司 Annular orifice plate flowmeter
CN103542896A (en) * 2013-11-07 2014-01-29 江苏华尔威科技有限公司 Large diameter gas measuring meter
CN204373705U (en) * 2014-12-08 2015-06-03 上海科洋科技股份有限公司 A kind of rectangular flow gauge
CN204831401U (en) * 2015-08-12 2015-12-02 银川融神威自动化仪表厂(有限公司) High flow rate flowmeter in heavy -calibre

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2144043A1 (en) * 2008-07-08 2010-01-13 Surpass Industry Co., Ltd. Differential-pressure flow meter and flow-rate controller
CN201392216Y (en) * 2009-04-30 2010-01-27 沈阳聚焦科技有限公司 Energy-saving differential pressure flowmeter
CN201476819U (en) * 2009-07-29 2010-05-19 银川融神威自动化仪表厂(有限公司) Balanced-type V-shaped cone flow meter
CN203069216U (en) * 2012-12-26 2013-07-17 江阴市神州测控设备有限公司 Annular orifice plate flowmeter
CN103542896A (en) * 2013-11-07 2014-01-29 江苏华尔威科技有限公司 Large diameter gas measuring meter
CN204373705U (en) * 2014-12-08 2015-06-03 上海科洋科技股份有限公司 A kind of rectangular flow gauge
CN204831401U (en) * 2015-08-12 2015-12-02 银川融神威自动化仪表厂(有限公司) High flow rate flowmeter in heavy -calibre

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