CN101017106A - Vencore flowmeter - Google Patents

Vencore flowmeter Download PDF

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Publication number
CN101017106A
CN101017106A CN 200710010458 CN200710010458A CN101017106A CN 101017106 A CN101017106 A CN 101017106A CN 200710010458 CN200710010458 CN 200710010458 CN 200710010458 A CN200710010458 A CN 200710010458A CN 101017106 A CN101017106 A CN 101017106A
Authority
CN
China
Prior art keywords
flowmeter
deflection cone
venturi tube
vencore
pressure
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
CN 200710010458
Other languages
Chinese (zh)
Inventor
张志�
陈雅芬
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.)
Dalian Hengli Measure & Control Instrument Engineering Co Ltd
Original Assignee
Dalian Hengli Measure & Control Instrument Engineering 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 Dalian Hengli Measure & Control Instrument Engineering Co Ltd filed Critical Dalian Hengli Measure & Control Instrument Engineering Co Ltd
Priority to CN 200710010458 priority Critical patent/CN101017106A/en
Publication of CN101017106A publication Critical patent/CN101017106A/en
Pending legal-status Critical Current

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Abstract

This invention discloses one Ventura tube and flow guide tamper combination flow measurement device, which comprises flow save device and difference voltage conversion and display device, wherein, the flow save device is composed of guide flow tamper between throat direct section and tamper diffusion section; the venture tube guide tamper section is set with high voltage taker tube and low one.

Description

Vencore flowmeter
Technical field
The present invention relates to differential pressure type flow instrument technical field, is a kind of flowmeter of measuring the high measurement accuracy of various liquids and gases flows.
Background technology
In the prior art, be that the weak point that the differential pressure flowmeter of representative exists is with orifice plate, nozzle and Venturi tube: the efflux coefficient instability, linear poor, repeatability is not high, and rangeability is little, and on-the-spot mounting condition requires harsh, crushing is bigger, and measuring accuracy awaits improving and improving.
Summary of the invention
The objective of the invention is to design the differential pressure flowmeter of the regime flow signal under a kind of low noise background, to improve measurement range and precision.
Technical scheme of the present invention is: Vencore flowmeter, constitute by conversion of restriction device and differential pressure and display device, its structure be described restriction device by Venturi tube and be located at Venturi tube throat straight length and the conic diffuse section between the deflection cone body constitute, the deflection cone body small-angle conical surface is towards Venturi nozzle, the axis of deflection cone body and the dead in line of Venturi tube, be provided with high pressure pressure pipe and low pressure pressure pipe on the pipeline section at the deflection cone body place of Venturi tube, high pressure pressure pipe and low pressure pressure pipe connect with the differential pressure conversion equipment;
Vencore flowmeter of the present invention, its structure are that described Venturi tube is made up of Venturi nozzle, throat's straight length, conic diffuse section and rear portion straight length, and conic diffuse section tapering is 15 °;
Vencore flowmeter of the present invention, its structure are that described deflection cone body is divided into precentrum, posterior pyramids, and the tapering of the precentrum of deflection cone body is 35 degree~55 degree, and the tapering of the posterior pyramids of deflection cone body is 120 degree~150 degree;
Vencore flowmeter of the present invention, its structure are that described deflection cone body is fixedly connected in the Venturi tube by low pressure pressure pipe;
Vencore flowmeter of the present invention, its structure are that described deflection cone body is fixedly connected in the Venturi tube with support.
Principle of work of the present invention is: when measured medium was flowed through Vencore flowmeter, the Venturi nozzle fluid medium was quickened, and fluid velocity profile is carried out rectification and current stabilization, at the higher flow velocity of the inner generation of Venturi tube throat.Cone-shaped body detects flow velocity and carries out 2 rectifications in the throat of Venturi tube.Owing to increase and stablize at throat's contraction place flow velocity, fluid velocity profile has been stabilized and linearization, make velocity distribution become smooth and symmetrical, flow signal is stable and noise is little, makes the cone-shaped body restricting element can detect bigger differential pressure and stable flow rate signal.The diffuser of fluid media (medium) behind cone-shaped body forms the low-pressure area of high speed, turbulent flow and a rotational symmetry micro cyclone, produce high frequency pressure fluctuation signal by a narrow margin, both differential pressure output signals of low noise background, under the situation of turbulent flow, the fluid media (medium) flow velocity of the Vencore flowmeter of flowing through is directly proportional with the evolution of differential pressure.Therefore lower differential pressure value also can be detected effectively.Simultaneously, form the purging feature along tube wall diffuser high-velocity fluid, impurity in the fluid media (medium) can not assembled at low-pressure area, dirty medium is difficult for being bonded on the cone-shaped body, because flowmeter has been realized the throttle style that shrinks gradually, spreads gradually, under identical flow and identical β value condition, the differential pressure value of flowmeter is about 1/2nd of orifice plate differential pressure value, and energy loss is little.
Advantage of the present invention is:
1, measuring accuracy height, flow measurement range is wide, allows to select for use lower differential pressure higher limit.
2, the permanent compression loss is little.
3, dirty medium is difficult for being bonded on the cone-shaped body, has the self-cleaning function.
Description of drawings
The present invention has accompanying drawing one width of cloth, is literary composition gram cone flow meter structural representation.
In the accompanying drawing: 1, flange, 2, Venturi nozzle, 3, high pressure pressure pipe, 4, low pressure pressure pipe, 5, Venturi tube throat, 6, the deflection cone body, 7, the conic diffuse section, 8, straight length, 9, temperature survey mouth, 10, the multiparameter flow computer, 11, the RTD temperature sensor.
Embodiment
Below in conjunction with accompanying drawing 1, specific embodiments of the invention are further described.Present embodiment is the Vencore flowmeter of test fluid pressure medium and temperature simultaneously.Advancing of Venturi tube, endpiece all is provided with the flange (1) of connecting line, the import of Venturi tube is Venturi nozzle (2), then be throat's straight length (5), it then is the conic diffuse section (7) that has 15 degree taperings, have two holes on throat's pipeline section of Venturi tube, high pressure pressure pipe (3) and low pressure pressure pipe (4) with the flow parameter conversion equipment is tightly connected respectively, wherein, low pressure pressure pipe stretches in the deflection cone body (6), the deflection cone body is fixedly connected on the low pressure pressure pipe, and the position that makes the deflection cone body places between the throat's straight length and conic diffuse section of Venturi tube, makes the axis of deflection cone body and the dead in line of Venturi tube.On the rear portion of Venturi tube straight length (8), have a temperature survey hole (9), the temperature survey hole is connected with temperature sensor (11), and flow parameter conversion equipment, temperature sensor and multiparameter flow computer (10) are installed in the top of Vencore flowmeter.Flow parameter conversion equipment and temperature sensor are transferred to the multiparameter flow computer with signal separately respectively, after machine is handled as calculated, transmit with result's demonstration or to next stage.

Claims (5)

1, Vencore flowmeter, constitute by conversion of restriction device and differential pressure and display device, it is characterized in that described restriction device by Venturi tube and be located at Venturi tube throat straight length (5) and conic diffuse section (7) between deflection cone body (6) constitute, the deflection cone body small-angle conical surface is towards Venturi nozzle, the axis of deflection cone body and the dead in line of Venturi tube, be provided with high pressure pressure pipe (3) and low pressure pressure pipe (4) on the pipeline section at the deflection cone body place of Venturi tube, high pressure pressure pipe (3) and low pressure pressure pipe (4) connect with the differential pressure conversion equipment.
2, Vencore flowmeter according to claim 1 is characterized in that described Venturi tube is made up of Venturi nozzle (2), throat's straight length (5), conic diffuse section (7) and rear portion straight length, and conic diffuse section tapering is 15 degree.
3, Vencore flowmeter according to claim 1 and 2, it is characterized in that described deflection cone body (6) is divided into precentrum, posterior pyramids, the tapering of the precentrum of deflection cone body is 35 degree~55 degree, and the tapering of the posterior pyramids of deflection cone body is 120 degree~150 degree.
4, Vencore flowmeter according to claim 1 and 2 is characterized in that described deflection cone body is fixedly connected in the Venturi tube by low pressure pressure pipe (4).
5, Vencore flowmeter according to claim 1 and 2 is characterized in that described deflection cone body is fixedly connected in the Venturi tube with support.
CN 200710010458 2007-02-14 2007-02-14 Vencore flowmeter Pending CN101017106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200710010458 CN101017106A (en) 2007-02-14 2007-02-14 Vencore flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200710010458 CN101017106A (en) 2007-02-14 2007-02-14 Vencore flowmeter

Publications (1)

Publication Number Publication Date
CN101017106A true CN101017106A (en) 2007-08-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200710010458 Pending CN101017106A (en) 2007-02-14 2007-02-14 Vencore flowmeter

Country Status (1)

Country Link
CN (1) CN101017106A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445241A (en) * 2010-10-05 2012-05-09 俞建峰 Magnetic-sensing-type flow sensing system
CN102607652A (en) * 2012-03-29 2012-07-25 山东泽谊自控技术有限公司 Steady-state alpha sensor
CN102735292A (en) * 2012-06-18 2012-10-17 北京遥测技术研究所 Differential pressure type flow rate measuring device
CN102944271A (en) * 2012-11-27 2013-02-27 银川融神威自动化仪表厂(有限公司) Composite internal and external venturi tube flowmeter
CN103697951A (en) * 2013-12-18 2014-04-02 苏州瑞尔维电子科技有限公司 Flow measuring device
CN108844673A (en) * 2018-06-27 2018-11-20 天津浩天自动化仪表制造有限公司 A kind of rectification type Venturi tube pressure difference measuring device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445241A (en) * 2010-10-05 2012-05-09 俞建峰 Magnetic-sensing-type flow sensing system
CN102607652A (en) * 2012-03-29 2012-07-25 山东泽谊自控技术有限公司 Steady-state alpha sensor
CN102735292A (en) * 2012-06-18 2012-10-17 北京遥测技术研究所 Differential pressure type flow rate measuring device
CN102944271A (en) * 2012-11-27 2013-02-27 银川融神威自动化仪表厂(有限公司) Composite internal and external venturi tube flowmeter
CN103697951A (en) * 2013-12-18 2014-04-02 苏州瑞尔维电子科技有限公司 Flow measuring device
CN108844673A (en) * 2018-06-27 2018-11-20 天津浩天自动化仪表制造有限公司 A kind of rectification type Venturi tube pressure difference measuring device

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