CN106525177A - Fluid pipeline with specific rectifying form - Google Patents

Fluid pipeline with specific rectifying form Download PDF

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Publication number
CN106525177A
CN106525177A CN201611162035.0A CN201611162035A CN106525177A CN 106525177 A CN106525177 A CN 106525177A CN 201611162035 A CN201611162035 A CN 201611162035A CN 106525177 A CN106525177 A CN 106525177A
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CN
China
Prior art keywords
measurement
flow
chamber
cavity
communicated
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CN201611162035.0A
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Chinese (zh)
Inventor
王成刚
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王成刚
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Application filed by 王成刚 filed Critical 王成刚
Priority to CN201611162035.0A priority Critical patent/CN106525177A/en
Publication of CN106525177A publication Critical patent/CN106525177A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus

Abstract

The invention provides a fluid pipeline with specific rectifying form, comprising an inlet guide cavity, a front spoiling cavity, a front rectifying cavity and a straight measuring pipe; one end of the inlet guide cavity is communicated with a process pipe, with the other end communicated with the front spoiling cavity; the front spoiling cavity is communicated with the front rectifying cavity; the front rectifying cavity is communicated with one end of the straight measuring pipe. The fluid pipeline with specific rectifying form has the advantages that the fluid pipeline is suitable for velocity type flow measurements under various principles; the required overall mounting length may be decreased to 3 times of the diameter of a pipeline to be equipped with a flowmeter; flow can be measured without using front and rear straight segments; by using the symmetric arrangement design, it is possible to rectify the flowing forms of a forward and reverse two-way fluid, ideal flowing form of the fluid can be achieved in the measurement area regardless of a forward or reverse flowing direction.

Description

The fluid circuit of specific rectification form
Technical field
The invention belongs to field of flow measurement, and in particular to a kind of fluid circuit arrangement of specific rectification form, adopting should The velocity flowmeter of kind of fluid circuit arrangement need not before and after straight length, and can be with bidirectional measuring.
Background technology
Fluid flow patterns:The velocity flow profile of the diverse location fluid particle in fluid line in a certain particular range is For the fluid flow patterns in the range of this.
Laminar flow:Fluid particle is for linear motion only along the direction parallel with pipe axle, particle without radial pulsation, between particle Mutually do not mix.
Turbulent flow:Fluid particle in addition to along tube axial direction flow forward, also radial pulsation, the speed of each particle is in size All change at any time with direction, particle collides with each other and mixes.
Reynolds number (Re):A kind of dimensionless number that can be used to characterize fluid flow patterns.Re=ρ vd/ μ, wherein v, ρ, μ point Not Wei the flow velocity of fluid, density and viscosity coefficient, d is a characteristic length.Such as fluid flows through circular pipe, then d is pipeline Equivalent diameter.The flowing that fluid can be distinguished using Reynolds number is laminar flow or turbulent flow, it is also possible to determine that object flows in a fluid Suffered resistance.
Fluid flow patterns are Re≤2000 being judged by the reynolds number Re of fluid in which state When, to flow for laminar flow, this area is referred to as laminar region;
During Re >=4000, typically there is turbulent flow, this area is referred to as turbulent area;
2000<Re<When 4000, flowing is probably laminar flow, it is also possible to which turbulent flow, the area are referred to as unstable transition region.
Ideally, fluid close round pipe in flow when, due to fluid viscosity, the impact of tube wall frictional force, make The rate of flow of fluid that the center of circle must be in is most fast, and the rate of flow of fluid near tube wall is most slow, therefore the velocity flow profile on cross-section of pipeline As a parabola, most fast near flow velocity at axle center, as the off-axis heart is more remote, flow velocity is gradually lowered.
Mean flow rate:As fluid has stickiness, when fluid flows in pipe, on same section, the flow velocity of each point is not Identical.Therefore for convenience of calculating, the concept of a mean flow rate is introduced, that is, assumes that the flow velocity of each point on flow section uniformly divides Cloth.The area of hypothesis fluid cross-section is A, and the fluid volume that the cross section is flow through in unit interval s is Qv, then mean flow rate V=Qv/(A*s)。
Velocity flowmeter:It is according to the unitary of fluid flowing continuity equation, flat in pipeline inner section to measure fluid Flow velocity carrys out the flowmeter of calculated flow rate as beasurement base.For velocity flowmeter, only nowed forming is in reason Think that the fluid of state can accurately measure mean flow rate.Straight length in front and back:Reality fluid line in, due to have elbow, The turbulator members such as eccentric reducer, regulating valve, vortex can be formed, laterally flowed etc., cause fluid flow patterns not into perfect condition. After turbulator member, need after the flowing of certain straight length, fluid flow patterns can just revert to perfect condition.
Therefore, velocity flowmeter needs the straight length of certain length before flowmeter, and one is also required to after flowmeter The straight length of measured length is in perfect condition with the fluid flow patterns for guaranteeing flowmeter position.As depicted in figs. 1 and 2, without The metering pipeline arrangement requirement of rectifier is 20 times that the length of front straight length at least measures tubing internal diameter.Such as Fig. 3 and Fig. 4 institutes Show, even if the length for arranging straight length before rectifier also at least measures 10 times of tubing internal diameter.
The content of the invention
The purpose of the present invention aims to provide a kind of fluid circuit of specific rectification form, using the speed of this kind of pipeline arrangement Distance of the formula flowmeter procedure entry to procedure exit end face of flange to end face can be less than 3 times of diameters, it is not necessary to Qian Houzhi Pipeline section, and can be with bidirectional measuring.
The present invention provides a kind of fluid circuit of specific rectification form, including entrance guiding chamber, front flow-disturbing chamber, front rectification Chamber and measurement straight pipeline;Entrance guiding chamber one end is communicated with process piping, and the other end is communicated with front flow-disturbing chamber;Front flow-disturbing chamber with it is front Rectifying cavity is communicated;Front rectifying cavity is communicated with one end of measurement straight pipeline.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Entrance Diversion cavity is " L " type.
Preferably, the entrance guiding chamber pipeline that communicates one end with front flow-disturbing chamber is vertical with front flow-disturbing chamber.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Before disturb Stream chamber and/or front rectifying cavity are arranged on the periphery of measurement straight pipeline.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Before disturb Between stream chamber and front rectifying cavity, collector ring is set.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Before disturb Stream arranges restrictor ring in chamber.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Rectification Ring and restrictor ring be arranged in parallel.
Preferably, the opening direction of collector ring and restrictor ring is to anti-.
Preferably, restrictor ring is 1 with the A/F ratio of collector ring:1.2-1.5.
Preferably, the width of restrictor ring opening is 20mm.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:It is front whole Stream chamber has deflection cone;Deflection cone is arranged on the porch of measurement straight pipeline.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Measurement Straight pipeline is perpendicular with process piping.
Preferably, measurement straight pipeline has measurement proparea, measurement zone;Measurement proparea is adjacent with front rectifying cavity.
Preferably, the length in measurement proparea is measure straight pipeline internal diameter 3 times.
Preferably, measurement straight pipeline also has measurement back zone.
Preferably, the length of measurement back zone is measure straight pipeline internal diameter 3 times.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:Also wrap Include a mouthful diversion cavity, rear flow-disturbing chamber, rear rectifying cavity;Outlet diversion cavity one end is communicated with process piping, the other end and rear flow-disturbing chamber Communicate;Flow-disturbing chamber is communicated with rear rectifying cavity afterwards;Rectifying cavity is communicated with the other end of measurement straight pipeline afterwards.
Further, the present invention provides a kind of fluid circuit of specific rectification form, can also have the feature that:It is specific The fluid circuit of rectification form is made up of main body, two measurement straight tubes and two radome fairings.
Preferably, main body has measurement zone;Measurement proparea, measurement back zone are separately positioned in two measurement straight tubes;Two Individual measurement straight tube is fixed on the two ends of the measurement zone of main body.
Preferably, front flow-disturbing chamber, rear flow-disturbing chamber are arranged in main body, and in the two ends of measurement zone.
Preferably, entrance guiding chamber, outlet diversion cavity are arranged on the both sides of main body.
Preferably, front rectifying cavity, rear rectifying cavity are separately positioned on two radome fairings;Two radome fairings are separately fixed at The front flow-disturbing chamber of main body, the both sides in rear flow-disturbing chamber.
The effect of invention and effect
The present invention provides a kind of fluid circuit of specific rectification form, can be used for the velocity-type measurement of various principles; Integral installation length requirement can be reduced to be installed 3 times of flowmeter pipeline diameter;Before and after not needing, straight length is measurable flow Amount;Using design is arranged symmetrically, rectification can be carried out to the nowed forming of positive and negative bidirectional fluid, and though flow direction just or instead, Measured zone fluid flow patterns are attained by perfect condition.
Description of the drawings
Fig. 1 is traditional without the unidirectional metering pipeline arrangement of rectifier.
Fig. 2 is traditional without rectifier bidirectional measuring pipeline arrangement.
Fig. 3 is the unidirectional metering pipeline arrangement of traditional band rectifier.
Fig. 4 is traditional band rectifier bidirectional measuring pipeline arrangement.
Fig. 5 is the outline drawing of the fluid circuit of the specific rectification form of the present invention.
Fig. 6 is the semi-cutaway of the fluid circuit of the specific rectification form of the present invention.
Fig. 7 is the half-sectional stereogram of the fluid circuit of the specific rectification form of the present invention.
Specific embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 5, Fig. 6 and Fig. 7, the fluid circuit of specific rectification form is by 1, two measurement straight tubes 2 of main body and two Radome fairing 3 is constituted.
Two measurement straight tubes 2 are fixed on the body 1 by screw 4.Two radome fairings 3 are by 5 page fixing of screw in main body 1 On;Joint face between radome fairing 3 and main body 1 arranges sealing ring 6 and is sealed.
The inside of the fluid circuit of specific rectification form has following region:It is entrance guiding chamber 10, front flow-disturbing chamber 20, front whole Stream chamber 30, measurement straight pipeline 40, rear rectifying cavity 50, rear flow-disturbing chamber 60 and outlet diversion cavity 70.10 one end of entrance guiding chamber and mistake Cheng Guandao is communicated, and the other end is communicated with front flow-disturbing chamber 20;Front flow-disturbing chamber 20 is communicated with front rectifying cavity 30;Front rectifying cavity 30 and measurement One end of straight pipeline 40 communicates.The other end of measurement straight pipeline 40 is communicated with rear rectifying cavity 50;Rectifying cavity 50 and rear flow-disturbing chamber afterwards 60 communicate;Flow-disturbing chamber 60 is communicated with 70 one end of outlet diversion cavity afterwards, and the other end in rear flow-disturbing chamber 60 is communicated with process piping.
Entrance guiding chamber 10 is arranged on the body 1, is " L " type, with horizontal segment 11 and vertical section 12.Horizontal segment 11 can be with It is identical with process piping by flange, and in process piping on a straight line, pipe diameter size is also identical with process piping.Vertically Section 12 is perpendicular with front flow-disturbing chamber 20.
Front flow-disturbing chamber 20 is made up of the cavity in main body 1, and in the periphery of measurement straight pipeline 40.Front rectifying cavity 30 It is arranged on radome fairing 3, is also at measuring the periphery of straight pipeline 40.Collector ring 31 is arranged on front flow-disturbing chamber and front whole Between stream chamber, it is made up of measurement 2 outer wall evagination extension of straight tube.Restrictor ring 32 is arranged in front flow-disturbing chamber, by the inwall of radome fairing 3 Evagination extension is constituted.Collector ring 31 and restrictor ring 32 be arranged in parallel, and the opening direction of both is contrary.The opening width of restrictor ring 32 The ratio of the degree a and A/F b of collector ring 21 is 1:1.2-1.5.The optimum value of the A/F a of restrictor ring 32 is 20mm.
Certainly, the opening direction of collector ring 31 and restrictor ring 32 can also be in the same direction, but no opening direction be reversed it is whole Stream effect is good.In addition, restrictor ring 32 can be arranged on 2 outer wall evagination extension of measurement straight tube constituting;And collector ring 31 be arranged on it is whole The inwall evagination extension of stream cover 3 is constituted.
Front rectifying cavity 30 has deflection cone 33, and is in the port of measurement straight pipeline 40.Deflection cone 33 is by radome fairing 3 On triangle raised constitute.
Measurement straight pipeline 40 is perpendicular with process piping.Measurement straight pipeline 40 has measurement proparea 41, measurement zone 42 and surveys Amount back zone 43.Measurement proparea 41, measurement back zone 43 are made up of two measurement straight tubes 2 respectively.Measurement zone 42 is by the through hole in main body 1 Constitute.Measurement proparea 41, measurement zone 42 are identical with measurement 43 internal diameter of back zone, are all D, collectively form measurement straight pipeline 40.Measurement The length in proparea 41 is measure straight pipeline internal diameter D 3 times;The length of measurement back zone 43 is measure straight pipeline internal diameter 3 times.
Afterwards rectifying cavity 50, rear flow-disturbing chamber 60 and outlet diversion cavity 70 structure respectively with front rectifying cavity 30, front flow-disturbing chamber 20, The structure in entrance guiding chamber 10 is identical, is symmetrical set, and narration is not repeated.
The operation principle of the fluid circuit of specific rectification form:
Whole pipeline carries out process connection by flange, and the bore for measuring pipeline connects bore less than process.Process piping The flow of fluid come defers to following route:Entrance guiding chamber>Front flow-disturbing chamber>Front rectifying cavity>Measurement proparea>Measurement Area>Measurement back zone>Rectifying cavity afterwards>Flow-disturbing chamber afterwards>Outlet diversion cavity.
In front flow-disturbing chamber, the nowed forming of fluid is broken up, the then rectification in the front rectifying cavity so which is surveyed entering During buret road, nowed forming is evenly distributed, and then Jing measurements proparea flows into measured zone again, now the fluid stream in measured zone Dynamic form will become perfect condition.Measurement back zone is out entered afterwards from measurement zone fluid, then after after Jing rectifying cavity enter Flow-disturbing chamber, then enters process piping from outlet guiding region afterwards.
The internal diameter of measurement pipeline is carrying out selection, generally the 60 of process piping internal diameter according to the internal diameter of process piping ~80%.The wall thickness of measurement proparea and measurement back zone is 2.
After fluid reaches front flow-disturbing chamber, fluid flow state is broken up herein, forms rambling turbulent flow, in collector ring Rectifying cavity is entered under effect, then the region between collector ring and restrictor ring is rectified so that fluid is in restrictor ring each position Velocity flow profile it is uniform.The fluid that rectification is completed enters measurement proparea under the guide functions of deflection cone, in the stream of fluid herein State develops into fully-develop turbulent flow, becomes the flow morphology of perfect condition, subsequently into measured zone, can be with measured zone Flow-speed measurement is carried out using the velocity-type measuring method of different principle.From measured zone, out rear fluid is entered after measurement Area, then after commutating zone, after turbulent flow area, from outlet diversion cavity enter process piping.
Due to the rectification of forward and backward commutating zone so that also can reach preferable shape in the fluid flow patterns for guaranteeing to measure pipeline On the premise of state, the contraction in length of proparea, measurement back zone will be measured to measuring 3 times of tubing internal diameter, so as to reduce whole pipeline Size.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims It is defined, any replacement being readily apparent that to those skilled in the art that this technology is made, deformation, improvement each fall within the present invention's Protection domain.

Claims (10)

1. a kind of fluid circuit of specific rectification form, it is characterised in that:
Including entrance guiding chamber, front flow-disturbing chamber, front rectifying cavity and measurement straight pipeline;
Entrance guiding chamber one end is communicated with process piping, and the other end is communicated with the front flow-disturbing chamber;
The front flow-disturbing chamber is communicated with the front rectifying cavity;
The front rectifying cavity is communicated with one end of the measurement straight pipeline.
2. the fluid circuit of specific rectification form according to claim 1, it is characterised in that:The entrance guiding chamber is " L " type;
Preferably, the entrance guiding chamber pipeline that communicates one end with the front flow-disturbing chamber is vertical with the front flow-disturbing chamber.
3. the fluid circuit of specific rectification form according to claim 1, it is characterised in that:The front flow-disturbing chamber and/or The front rectifying cavity is arranged on the periphery of the measurement straight pipeline.
4. the fluid circuit of specific rectification form according to claim 1, it is characterised in that:The front flow-disturbing chamber and described Between front rectifying cavity, collector ring is set.
5. the fluid circuit of specific rectification form according to claim 4, it is characterised in that:Arrange in the front flow-disturbing chamber Restrictor ring.
6. the fluid circuit of specific rectification form according to claim 5, it is characterised in that:The collector ring and the section Stream ring be arranged in parallel;
Preferably, the opening direction of the collector ring and the restrictor ring is to anti-;
Preferably, the restrictor ring is 1 with the A/F ratio of the collector ring:1.2-1.5;
Preferably, the width of the restrictor ring opening is 20mm.
7. the fluid circuit of specific rectification form according to claim 1, it is characterised in that:The front rectifying cavity has to be led Flow cone;The deflection cone is arranged on the porch of the measurement straight pipeline.
8. the fluid circuit of specific rectification form according to claim 1, it is characterised in that:The measurement straight pipeline and mistake Cheng Guandao is perpendicular;
Preferably, the measurement straight pipeline has measurement proparea, measurement zone;The measurement proparea and the front rectifying cavity phase It is adjacent;
Preferably, the length in the measurement proparea is 3 times of the measurement straight pipeline internal diameter;
Preferably, the measurement straight pipeline also has measurement back zone;
Preferably, the length of the measurement back zone is 3 times of the measurement straight pipeline internal diameter.
9. the fluid circuit of specific rectification form according to claim 8, it is characterised in that:Also include outlet diversion cavity, Flow-disturbing chamber, rear rectifying cavity afterwards;
Described outlet diversion cavity one end is communicated with process piping, and the other end is communicated with the rear flow-disturbing chamber;
The rear flow-disturbing chamber is communicated with the rear rectifying cavity;
The rear rectifying cavity is communicated with the other end of the measurement straight pipeline.
10. the fluid circuit of specific rectification form according to claim 9, it is characterised in that:The specific rectification form Fluid circuit by main body, two measurement straight tubes and two radome fairings constitute;
Preferably, the main body has measurement zone;The measurement proparea, the measurement back zone are separately positioned on two surveys In amount straight tube;Two it is described measurement straight tube be fixed on the main body the measurement zone two ends;
Preferably, the front flow-disturbing chamber, the rear flow-disturbing chamber are arranged on the body, and in the two of the measurement zone End;
Preferably, the entrance guiding chamber, the outlet diversion cavity are arranged on the both sides of the main body;
Preferably, the front rectifying cavity, the rear rectifying cavity are separately positioned on two radome fairings;Two rectifications Cover is separately fixed at described front flow-disturbing chamber, the both sides in the rear flow-disturbing chamber of the main body.
CN201611162035.0A 2016-12-15 2016-12-15 Fluid pipeline with specific rectifying form Pending CN106525177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611162035.0A CN106525177A (en) 2016-12-15 2016-12-15 Fluid pipeline with specific rectifying form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611162035.0A CN106525177A (en) 2016-12-15 2016-12-15 Fluid pipeline with specific rectifying form

Publications (1)

Publication Number Publication Date
CN106525177A true CN106525177A (en) 2017-03-22

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Application Number Title Priority Date Filing Date
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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109579925A (en) * 2018-11-17 2019-04-05 德闻仪器仪表(上海)有限公司 A kind of built-in multichannel ultrasonic flow metering module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109579925A (en) * 2018-11-17 2019-04-05 德闻仪器仪表(上海)有限公司 A kind of built-in multichannel ultrasonic flow metering module

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