CN203414121U - Intelligent insertion type constant-speed tube flow meter - Google Patents
Intelligent insertion type constant-speed tube flow meter Download PDFInfo
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- CN203414121U CN203414121U CN201320439364.0U CN201320439364U CN203414121U CN 203414121 U CN203414121 U CN 203414121U CN 201320439364 U CN201320439364 U CN 201320439364U CN 203414121 U CN203414121 U CN 203414121U
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- pressure
- guiding pipe
- molded line
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Abstract
The utility model relates to the flow measurement technology and aims to provide an intelligent insertion type constant-speed tube flow meter. The flow meter comprises a pressure leading pipe and a pressure difference transmitter, wherein the pressure leading pipe is in a hollow column shape, the terminal of the pressure leading pipe is sealed, the inner part of the pressure leading pipe is divided into a front-side total pressure cavity and a rear-side static pressure cavity by a vertical partial board, and a plurality of through holes for leading the fluid pressure of an environments in which the cavities are located are respectively formed in the walls of the total pressure cavity and the static pressure cavity; the outer edge of the transverse section of the pressure leading pipe is in a shape formed by the surrounding of two smooth curves and is in smooth transition at the joint of the two smooth curves. According to the intelligent insertion type constant-speed tube flow meter, the average temperature of actual working conditions can be locally and remotely monitored in real time, and the flow corresponding to the actual working conditions is converted into the flow of a standard working condition through a flow totalizer and is visually output. Due to the design of the transverse section of the pressure leading pipe, the machining process of a mold can be simplified, and the manufacturing cost of the mold can be lowered; the requirement of changing a flow blockage ratio from small to large can be met, and the stability of a separation point is guaranteed.
Description
Technical field
The utility model relates to flow measurement technology, particularly intelligent plug-in type mean velocity tube flowmeter.
Background technology
The mobile high-accuracy stable measurement of fluid is the important foundation data of the control of many industry and enterprise high precision, operational management and energy saving optimizing operation.The flow system relating to comprises ventilating system, pressurized gas system, water system and vapour system, and these systems are the power core of flow industry enterprise just.From the angle of process industry global optimization operation, promptly and accurately grasp the flow that each branch road user fluid medium is used, be distribution according to need and the important evidence of supplying with as required self-adaptation realization.
Mean velocity tube flowmeter, comprise Annbar, Torbar, Probar, verabar, itabar etc., be based on pitot tube measuring principle, i.e. typical differential flow sensor, calculates a kind of plug-in type flow instrument of flow with some flow velocity on test tube road cathetus.Also just because of based on the average flow rate calculation mode of many groups cross section pressure node pressure reduction, make mean velocity tube flowmeter and the Pitot tube feature based on Dan Zudian test produce the difference of internal.
The citation form of mean velocity tube flowmeter application, is all to carry out certain abundant development on cross section of flowing on flow path direction, and radially (or assigned address and direction) inserts an inspection pressure guiding pipe.Inspection pressure guiding pipe inside is divided into independently cavity of two, stagnation pressure chamber and static pressure chamber, and meeting flow path direction front side cavity is stagnation pressure chamber, and rear side is static pressure chamber.Inspection pressure guiding pipe is met flow path direction according to logarithm Chebyshev integration method, and chosen position becomes to split gets pitot hole, identical with stagnation pressure chamber.The difference of each point place flow velocity causes even speed tube pitot hole to be measured, and is the stagnation pressure with average characteristics.
The mean velocity tube flowmeter of different names, under above-mentioned basic application form, main difference shows as different investigative techniques in the otherness of inspection pressure guiding pipe interface and baroport position of opening.Mean velocity tube flowmeter, in its development course, has experienced circle, rhombus, aerodynamics shape and bullet-headed etc. multi-form.The mean velocity tube flowmeter of round section wherein, because burble point is unstable and lose the problems such as resistance, cause coefficient of flow with the problem of change in flow, cannot be applicable to the Accurate Determining of changeable operating mode, measuring accuracy is ± 10%～20%, round section exists whirlpool to vibration, to cause the problem of pressure guiding pipe stress fatigue simultaneously, and therefore this kind of even speed tube flow fail to be promoted on a large scale.The mean velocity tube flowmeter burble point of diamond-shaped cross-section is stable, but because shape itself causes mobile variation, cause pressure guiding pipe to be subject to larger mobile tractive force, induced vibration and noise, baroport is opened at negative pressuren zone on the other hand, easily stop up the widespread adoption of such mean velocity tube flowmeter that these problems also limit.The starting point of aerodynamics shape mean velocity tube flowmeter is by the optimization to pressure guiding pipe shape, reach the target that significantly reduces the permanent crushing of measuring process, but also just because of aerodynamic introducing, cause such mean velocity tube flowmeter exist higher-pressure region scope little, to inflow angle degree sensitive issue, measuring error can be greater than ± 10.0%.Bullet-headed Verabar mean velocity tube flowmeter, on the whole, stable burble point, larger higher-pressure region scope, side static pressure perforate, stable coefficient of flow and comparatively good anti-clogging characteristic, become the trend of a kind of application in mean velocity tube flowmeter.But, there is the larger problem of time processing moulding difficulty in the three stage structure of its shape.On the other hand, in actual moving process, in gas technology process, because temperature, pressure and flow parameter are couple variations, user's actual needs be believable reference frame---mark condition flow, and the actual condition flow that existing mean velocity tube flowmeter generally provides, and between user's demand, there is corresponding difference.， enterprise has become the only way which must be passed of corporate sustainability with energy and efficiency management and control simultaneously, and so as important parameter, the measurement of flow should have the ability of communication.
Target of the present utility model is from fluid mechanics principle and mobile control angle, the integral and intelligent type plug-in type mean velocity tube flowmeter that provide a kind of and be easy to produce, permanent drag losses is little, can carries out pressure, pressure reduction, flow parameter, and can be in conjunction with modern communication technology, realize the remote visible fractional analysis of data, for the multi-level demand of measuring of user, provide one-stop intelligent service.Certainly, in actual application, according to the variation of customer requirements, also can carry out the multi-form combination of above-mentioned functions, complete corresponding measurement function.
Utility model content
The technical problems to be solved in the utility model is, overcomes deficiency of the prior art, and a kind of intelligent plug-in type mean velocity tube flowmeter is provided.
For technical solution problem, solution of the present utility model is:
A kind of intelligent plug-in type mean velocity tube flowmeter is provided, comprises pressure guiding pipe and pressure difference transmitter; Pressure guiding pipe is hollow columnar, its its endcapped, and inside is divided into stagnation pressure chamber, front side and rear side static pressure chamber by vertical dividing plate, establishes respectively some for introducing the through hole of the hydrodynamic pressure of cavity environment of living on the wall in stagnation pressure chamber and static pressure chamber; The external margin of described pressure guiding pipe lateral cross section is two smooth curves and encloses the shape forming, and in the joint of two smooth curves, is rounding off.
In the utility model, described in enclose in the smooth curve of the external margin that forms pressure guiding pipe lateral cross section:
Being positioned at what meet stream end one side is index curve f
1, its concrete form is
y=f
1(x)=a×(exp(b×(ABS(x)))-1) （1）
In this formula: x be pressure guiding pipe cross section perpendicular to the value of carrying out flow path direction width coordinate, true origin is being met the angle place of stream end pressure guiding pipe line of symmetry, because of to taking the positive and negative mm of Zhi， unit; Y is the value of streamwise coordinate, and unit is mm; A is the qualitative constant of molded line, dimensionless, span 0<a<25; B is the qualitative constant of molded line, dimensionless, span 0<b<3;
Be positioned at the curve f that meets stream end subtend one side
2, its concrete form is:
y=f
2(x)=c×x
2+d×x+e （2）
In this formula: x be pressure guiding pipe cross section perpendicular to the value of carrying out flow path direction width coordinate, true origin is being met the angle place of stream end pressure guiding pipe line of symmetry, because of to taking the positive and negative mm of Zhi， unit; Y is the value of streamwise coordinate, and unit is mm; C is the qualitative constant of molded line, dimensionless, span-25<c<25; D is the qualitative constant of molded line, dimensionless, span-15<d<25; E is the qualitative constant of molded line, dimensionless, span 50<e<550.
In the utility model, the internal edge of described pressure guiding pipe lateral cross section is to be also two smooth curves to enclose the shape forming, and in the joint of two smooth curves, is rounding off; Wherein,
Being positioned at what meet stream end one side is index curve f
3, its concrete form is:
y=f
3(x)=a
1×(exp(b
1×(ABS(x)))-a
2) （3）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; a
1for the qualitative constant of molded line, dimensionless, span 0<a
1<25; a
2for the qualitative constant of molded line, dimensionless, span 0<a
2<1; b
1for the qualitative constant of molded line, dimensionless, span 0<b
1<3;
Be positioned at the curve f that meets stream end subtend one side
4, its concrete form is:
y=f
4(x)=c
1×x
2+d
1×x+e
1 （4）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
1for the qualitative constant of molded line, dimensionless, span-25<c
1<25; d
1for the qualitative constant of molded line, dimensionless, span-15<d
1<25; e
1for the qualitative constant of molded line, dimensionless, span 50<e
1<550.
In the utility model, in described pressure guiding pipe, two of the lateral cross section of vertical baffle edges are to be also smooth curve shape; Wherein,
Being positioned at what meet stream end one side is curve f
5, its concrete form is:
y=f
5(x)=c
2×x
2+d
2×x+e
2 （5）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
2for the qualitative constant of molded line, dimensionless, span-25<c
2<25; d
2for the qualitative constant of molded line, dimensionless, span-15<d
2<25; e
2for the qualitative constant of molded line, dimensionless, span 50<e
2<300.
Be positioned at the curve f that meets stream end subtend one side
6, its concrete form is:
y=f
6(x)=c
3×x
2+d
3×x+e
3 （6）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
3for the qualitative constant of molded line, dimensionless, span-25<c
3<25; d
3for the qualitative constant of molded line, dimensionless, span-15<d
3<25; e
3for the qualitative constant of molded line, dimensionless, span 50<e
3<300.
In the utility model, the front end of described pressure guiding pipe outside has the surface that roughening is processed.
As a kind of improvement, the span of the front-end surface roughness of described pressure guiding pipe is 3.2-6.3.
In the utility model, this flowmeter also comprises flow integrator; Described pressure difference transmitter is arranged on pressure guiding pipe top, is connected respectively with the stagnation pressure chamber of pressure guiding pipe with static pressure chamber; Described flow integrator is connected with pressure difference transmitter.
As a kind of improvement, described flow integrator is with multi-analog input interface, and the output signal ，Yi road that wherein a road is used for connecting pressure difference transmitter is for connecting external temperature sensor.
As a kind of improvement, described temperature sensor is located at exit, stagnation pressure chamber, or is laid in pressure guiding pipe surface.
With respect to prior art, the beneficial effects of the utility model are:
1, can be by measure the temperature that go out fluid corresponding to high pressure pressure point in flow field, and the mean value based on multi-point temp, or measure the temperature of pressure guiding pipe endpiece medium, and by thering is the temperature sensor of communication module, on the spot and the medial temperature of remote real time monitoring actual condition, and by flow integrator, flow corresponding to actual condition is converted into standard condition flow, visual output.In actual motion, this function can determine whether combination according to onsite user's actual requirement.
2, the external margin of pressure guiding pipe lateral cross section is two smooth curves and encloses the shape forming, and such design can be simplified mould processing technology, reduces manufacturing cost.
3, the corresponding xsect outer curve of pressure guiding pipe shape can also meet flow blockage than the requirement changing from small to large, for dynamic pressure in flow process and static pressure, mutually change mobile geometrical boundary condition is provided, the outer wall of this form, can guarantee that burble point is stable on the other hand.
Accompanying drawing explanation
Fig. 1 is the structural representation of intelligent plug-in type mean velocity tube flowmeter;
Fig. 2 is the transverse sectional view of pressure guiding pipe.
Mark in Fig. 1: 1 pressure guiding pipe, 2 impulse joints, 3 stagnation pressure chambeies, 4 static pressure chambeies, 5 dividing plates, 6 stagnation pressure chamber tracting pressuring holes, 7 static pressure chamber tracting pressuring holes.
Mark in Fig. 2: f
1, f
2, f
3, f
4, f
5, f
6refer to the curve at each edge that forms pressure guiding pipe lateral cross section, wherein f
1be positioned at and meet stream end one side.
Embodiment
Fig. 1 is the structural representation of intelligent plug-in type mean velocity tube flowmeter in the utility model.
This flowmeter comprises pressure guiding pipe 1, pressure difference transmitter and flow integrator; Pressure guiding pipe 1 is hollow columnar, its inside is divided into the stagnation pressure chamber 3 of front side and the static pressure chamber 4 of rear side by vertical dividing plate 5, on the wall in stagnation pressure chamber 3 and static pressure chamber 4, establish respectively some for introducing the through hole of the hydrodynamic pressure of cavity environment of living in, i.e. stagnation pressure chamber tracting pressuring hole 6 and static pressure chamber tracting pressuring hole 7.Stagnation pressure chamber tracting pressuring hole 6 is arranged on the front side of stagnation pressure chamber 3 fluoran stream surfaces, becomes to split get according to Chebyshev's integral formula; The prevention high pressure that incoming flow is corresponding, is connected with high pressure connection with high-pressure channel by stagnation pressure chamber, and the average prevention high pressure of different cross section is drawn.
Pressure difference transmitter is arranged on pressure guiding pipe 1 top, by impulse joint 2, is connected respectively with the stagnation pressure chamber 3 of pressure guiding pipe 1 with static pressure chamber 4; Flow integrator is connected with pressure difference transmitter.Flow integrator is with multi-analog input interface, and the output signal ，Yi road that wherein a road is used for connecting pressure difference transmitter is for connecting external temperature sensor.Temperature sensor is for the value of fluid corresponding temperature, can adopt the 3 exit single-points in stagnation pressure chamber to measure, or the mean value of getting multi-measuring point at pressure guiding pipe 1 surface installing thermal sensing element is realized, the target of this function is that measured discharge is converted into mark condition flow, can according to user's request and whether field conditions determines to need or single-point or multiple spot measures in practical application.
As shown in Figure 2, the external margin of pressure guiding pipe 1 lateral cross section is two smooth curves and encloses the shape forming.Article two, in smooth curve, the parameter of a smooth curve is shown in formula (1), and the parameter of another smooth curve is shown in formula (2).The curved shape of lateral cross section of surface of internal cavity and vertical baffle 5 in pressure guiding pipe 1, its parameter is shown in formula (3)-(6).
The front end outside of pressure guiding pipe 1 has the surface that roughening is processed, and its roughness span is 3.2-6.3.Pressure guiding pipe 1 front-end surface coarse language is the design based on Magnus Effect, has guaranteed the introducing of this wall place turbulent boundary layer, reduces the tractive force that flows pressure guiding pipe 1 is caused.
Two cavity configurations of pressure guiding pipe 1 once draw moulding, guarantee strict separation between stagnation pressure chamber 3 and static pressure chamber 4, avoid because leakage causes the mutual interference of output pressure phase, when measuring accuracy declines, shorten pressure guiding pipe 1 whole service life.
In actual measurement process, when fluid is flowed through pressure guiding pipe 1, many groups stagnation pressure chamber tracting pressuring hole 6 of front side is drawn mobile prevention high pressure; Open the average value of static pressure of drawing corresponding node at the static pressure chamber of side tracting pressuring hole 7, two pressure mean values form the Data Source of flow rate calculation.
For different flow operating modes, the pressure of drawing and pressure reduction, can be by having the secondary instrument module of communication function, on the spot and long-range visual demonstration, can export in gauge outfit and Upper system at secondary instrument, obtain synchronous demonstration, flow parameter is carried out visual real-time intelligent monitoring.For laying the first stone with energy management and control platform of user.
Pressure transducer, pressure difference transmitter, the temperature sensor of corresponding this device, all should be equipped with the function with communication capacity module, to realize data in situ and long-range transmission and demonstration.
For different user, variation due to production technology, product and environmental working condition, directly cause corresponding flowmeter to measure the variation of parameter, angle in user's management and control, for gas medium, strong coupling between pressure, flow and temperature, is difficult to carry out according to single parameter the judgement of corresponding technological process.In other words, for the measurement of gas medium, preferably convert the flow of standard condition to.
Claims (9)
1. intelligent plug-in type mean velocity tube flowmeter, comprises pressure guiding pipe and pressure difference transmitter; Pressure guiding pipe is hollow columnar, its endcapped, and inside is divided into stagnation pressure chamber, front side and rear side static pressure chamber by vertical dividing plate, establishes respectively some for introducing the through hole of the hydrodynamic pressure of cavity environment of living on the wall in stagnation pressure chamber and static pressure chamber; It is characterized in that, the external margin of described pressure guiding pipe lateral cross section is two smooth curves and encloses the shape forming, and in the joint of two smooth curves, is rounding off.
2. flowmeter according to claim 1, is characterized in that, described in enclose in the smooth curve of the external margin that forms pressure guiding pipe lateral cross section:
Being positioned at what meet stream end one side is index curve f
1, its concrete form is:
y=f
1(x)=a×(exp(b×(ABS(x)))-1) （1）
In this formula: x be pressure guiding pipe cross section perpendicular to the value of carrying out flow path direction width coordinate, true origin is being met the angle place of stream end pressure guiding pipe line of symmetry, because of to taking the positive and negative mm of Zhi， unit; Y is the value of streamwise coordinate, and unit is mm; A is the qualitative constant of molded line, dimensionless, span 0<a<25; B is the qualitative constant of molded line, dimensionless, span 0<b<3;
Be positioned at the curve f that meets stream end subtend one side
2, its concrete form is:
y=f
2(x)=c×x
2+d×x+e （2）
In this formula: x be pressure guiding pipe cross section perpendicular to the value of carrying out flow path direction width coordinate, true origin is being met the angle place of stream end pressure guiding pipe line of symmetry, because of to taking the positive and negative mm of Zhi， unit; Y is the value of streamwise coordinate, and unit is mm; C is the qualitative constant of molded line, dimensionless, span-25<c<25; D is the qualitative constant of molded line, dimensionless, span-15<d<25; E is the qualitative constant of molded line, dimensionless, span 50<e<550.
3. flowmeter according to claim 1, is characterized in that, the internal edge of described pressure guiding pipe lateral cross section is to be also two smooth curves to enclose the shape forming, and in the joint of two smooth curves, is rounding off; Wherein,
Being positioned at what meet stream end one side is index curve f
3, its concrete form is:
y=f
3(x)=a
1×(exp(b
1×(ABS(x)))-a
2) （3）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; a
1for the qualitative constant of molded line, dimensionless, span 0<a
1<25; a
2for the qualitative constant of molded line, dimensionless, span 0<a
2<1; b
1for the qualitative constant of molded line, dimensionless, span 0<b
1<3;
Be positioned at the curve f that meets stream end subtend one side
4, its concrete form is:
y=f
4(x)=c
1×x
2+d
1×x+e
1 （4）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
1for the qualitative constant of molded line, dimensionless, span-25<c
1<25; d
1for the qualitative constant of molded line, dimensionless, span-15<d
1<25; e
1for the qualitative constant of molded line, dimensionless, span 50<e
1<550.
4. flowmeter according to claim 1, is characterized in that, in described pressure guiding pipe, two of the lateral cross section of vertical baffle edges are to be also smooth curve shape; Wherein,
Being positioned at what meet stream end one side is curve f
5, its concrete form is:
y=f
5(x)=c
2×x
2+d
2×x+e
2 （5）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
2for the qualitative constant of molded line, dimensionless, span-25<c
2<25; d
2for the qualitative constant of molded line, dimensionless, span-15<d
2<25; e
2for the qualitative constant of molded line, dimensionless, span 50<e
2<300;
Be positioned at the curve f that meets stream end subtend one side
6, its concrete form is:
y=f
6(x)=c
3×x
2+d
3×x+e
3 （6）
In this formula: x and y are the coordinate value of corresponding surface of internal cavity both direction, and unit is mm; c
3for the qualitative constant of molded line, dimensionless, span-25<c
3<25; d
3for the qualitative constant of molded line, dimensionless, span-15<d
3<25; e
3for the qualitative constant of molded line, dimensionless, span 50<e
3<300.
5. according to the flowmeter described in claim 1 to 4 any one, it is characterized in that, the front end outside of described pressure guiding pipe has the surface that roughening is processed.
6. flowmeter according to claim 5, is characterized in that, the span of the front-end surface roughness of described pressure guiding pipe is 3.2-6.3.
7. according to the flowmeter described in claim 1 to 4 any one, it is characterized in that, this flowmeter also comprises flow integrator; Described pressure difference transmitter is arranged on pressure guiding pipe top, is connected respectively with the stagnation pressure chamber of pressure guiding pipe with static pressure chamber; Described flow integrator is connected with pressure difference transmitter.
8. flowmeter according to claim 7, is characterized in that, described flow integrator is with multi-analog input interface, and the output signal ，Yi road that wherein a road is used for connecting pressure difference transmitter is for connecting external temperature sensor.
9. flowmeter according to claim 8, is characterized in that, described temperature sensor is located at exit, stagnation pressure chamber, or is laid in pressure guiding pipe surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439364.0U CN203414121U (en) | 2013-07-20 | 2013-07-20 | Intelligent insertion type constant-speed tube flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320439364.0U CN203414121U (en) | 2013-07-20 | 2013-07-20 | Intelligent insertion type constant-speed tube flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203414121U true CN203414121U (en) | 2014-01-29 |
Family
ID=49977004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320439364.0U Expired - Lifetime CN203414121U (en) | 2013-07-20 | 2013-07-20 | Intelligent insertion type constant-speed tube flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203414121U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
-
2013
- 2013-07-20 CN CN201320439364.0U patent/CN203414121U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |