CN106802169A - A kind of many venturi orifices balance flow meters - Google Patents
A kind of many venturi orifices balance flow meters Download PDFInfo
- Publication number
- CN106802169A CN106802169A CN201710207611.7A CN201710207611A CN106802169A CN 106802169 A CN106802169 A CN 106802169A CN 201710207611 A CN201710207611 A CN 201710207611A CN 106802169 A CN106802169 A CN 106802169A
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- Prior art keywords
- venturi
- many
- orifices
- balance flow
- flow meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/42—Orifices or nozzles
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of many venturi orifices balance flow meters, including measurement body, the two ends of the measurement body are fixedly connected with mounting flange, the mounting flange is provided with flange hole, the middle inside of the measurement body is provided with many venturi orifice plates, and on the measurement body and both sides of many venturi orifice plates are equipped with pressure pipe；Many venturi orifices balance flow meters, venturi orifices are tubaeform contraction pod apertures, are gently shunk when fluid passes through, slow to accelerate, and balanced transition is greatly reduced the resistance to fluid, greatly reduce because drastically shrink and caused by the loss of momentum, energy loss；It is of the invention to compare with existing straight hole balance flow meter, it is firm safely with structure, the characteristics of not easy to wear, long-time stability are good, certainty of measurement is high, the pressure loss is smaller.
Description
Technical field
The invention belongs to flow measurement technology field, and in particular to a kind of many venturi orifices balance flow meters.
Background technology
Differential pressure flowmeter is with a long history, is most widely used in all kinds of flow instruments.It is with Bernoulli's theorem and stream
Dynamic continuity equation is general principle, the difference of the pressure produced by restricting element is crossed by measuring fluid stream in pipeline, with reference to
Working condition is known so as to try to achieve flow.Wherein multi-hole orifice balance flow meter is in 2003 by US National Aeronautics and Space Administration
The orifice flowmeter of new generation that related companies A+FLOWTEK research and development are released, and start to apply in the world.In 2006 by section
Foreign scientific ＆ technical corporation imports Chinese market.Multi-hole orifice balance flow meter is a kind of standard deviation pressure type throttling arrangement.
Relative to standard orifice plate throttling arrangement, multi-hole orifice balance flow meter creates many significant properties.Balanced flow
Sensor has the porous design feature such as uniform, can stream field shunted, balance, reduce vortex, vibration and noise, flow field is steady
It is qualitative to greatly improve, its permanent crushing reduction, range ratio broadening；Table body is press-fited using special accurate pipeline and special-purpose taking
Put, relative to standard orifice plate, its accuracy is improved；Its flow sensor thickness of slab is more than four times of standard orifice plate thickness, and section
Without chamfering, its service life is also accordingly greatly improved in discharge orifice downstream.
But multi-hole orifice balance flow meter is still restricting orifice structure, for standard Venturi meter,
, without as flow-guiding structure before and after Venturi meter, fluid enters each throttle orifice after sudden contraction before choke block, causes for it
Momentum, energy loss are higher, then its permanent crushing is higher；Its throttle orifice is 90 degree of right-angle structure, does not have standard venturi
The more resistant erosion resistance of obtuse angle structure.
The content of the invention
It is an object of the invention to provide a kind of many venturi orifices balance flow meters, to solve to be proposed in above-mentioned background technology
Problem.
To achieve the above object, the present invention provides following technical scheme：A kind of many venturi orifices balance flow meters, including survey
Buret body, the two ends of the measurement body are fixedly connected with mounting flange, and the mounting flange is provided with flange hole, described
The middle inside for measuring body is provided with many venturi orifice plates, and on the measurement body and both sides of many venturi orifice plates are equipped with and take
Pressure pipe.
Preferably, the inside of many venturi orifice plates is provided with venturi orifices, and the venturi orifices include venturi, the larynx
Parking Entrance is fixedly connected with the left of road, diffuser is fixedly connected with the right side of the venturi.
Preferably, there are positive pressure tappings and negative pressure tappings on the measurement body, and pressure pipe is connected to positive pressure
On mouth and negative pressure tappings.
Preferably, the angle [alpha] of the Parking Entrance is more than the angle beta of diffuser, and the angle [alpha] of Parking Entrance is 40 ° to 90 °,
The angle beta of diffuser is 10 ° to 90 °.
Preferably, the venturi orifices are at least provided with 7.
Preferably, the venturi orifices width of many venturi aperture plate centers is consistent with balance flow meter.
Technique effect of the invention and advantage：Many venturi orifices balance flow meters, venturi orifices are led for tubaeform contraction
Discharge orifice, gently shrinks when fluid passes through, slow to accelerate, and balanced transition is greatly reduced the resistance to fluid, greatly reduces
Because drastically shrink and caused by the loss of momentum, energy loss；Middle venturi is still round throttle orifice, the angle between Parking Entrance
It is obtuse angle, high-velocity fluid, dirty fluid and washing away containing solid particle fluid can be greatly reduced, more increases the service life.Expand
Scattered orifice angle is smaller, can make to be postponed in the passage gradually expanded by the fluid for accelerating separating and increasing of slowing down with tube wall boundary layer
Pressure, greatly reduces the generation of whirlpool, so as to farthest reduce the resistance and crushing of flow of fluid；It is of the invention straight with existing
Hole balance flow meter compares, firm safely with structure, not easy to wear, long-time stability are good, certainty of measurement is high, the pressure loss more
Small the characteristics of.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is sectional view of the invention；
Fig. 3 is venturi orifices structural representation of the invention.
In figure：1 measurement body, 2 mounting flanges, 3 flange holes, the orifice plate of venturi more than 4,5 pressure pipes, 6 venturi orifices, 61
Venturi, 62 Parking Entrances, 63 diffusers.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is described the invention provides a kind of many venturi orifices balance flow meters as Figure 1-3, including measurement body 1
The two ends for measuring body 1 are fixedly connected with mounting flange 2, and the mounting flange 2 is provided with flange hole 3, the measurement pipe
The middle inside of body 1 is provided with many venturi orifice plates 4, and on the measurement body 1 and both sides of many venturi orifice plates 4 are equipped with pressure
Pipe 5.
Further, the inside of many venturi orifice plates 4 is provided with venturi orifices 6, and the venturi orifices 6 include venturi
61, the left side of the venturi 61 is fixedly connected with Parking Entrance 62, and the right side of the venturi 61 is fixedly connected with diffuser 63, reduces
Fluid resistance, increases the accuracy of measurement.
Further, the angle [alpha] of the Parking Entrance 62 is more than the angle beta of diffuser 63, and the angle [alpha] of Parking Entrance 62 is
40 ° to 90 °, the angle beta of diffuser 63 is 10 ° to 90 °, reduces the generation of whirlpool.
Operation principle：Operationally, positive pressure tappings are used to gather malleation signal of the fluid in measurement body 1, bear pressure
Mouth is used to reduce fluid flow area, throttles for gathering negative pressure signal of the fluid in measurement body 1, many venturi orifice plates 4
Step-down, makes upstream and downstream produce pressure differential, and positive and negative pressure tappings are respectively welded pressure pipe 5 each, have connection on pressure pipe 5
Screw thread, pressure pipe 5 is for the connection such as valve, valve group, differential pressure transporting instruments and meters, for the positive/negative-pressure letter for collecting
Number the instrument such as differential pressure transmitter are guided to respectively.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent carried out to which part technical characteristic,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (6)
1. a kind of many venturi orifices balance flow meters, including measurement body (1), it is characterised in that：The two of measurement body (1)
End is fixedly connected with mounting flange (2), and the mounting flange (2) is provided with flange hole (3), measurement body (1)
Middle inside is provided with many venturi orifice plates (4), and on measurement body (1) and the both sides of many venturi orifice plates (4) are equipped with and take
Pressure pipe (5).
2. a kind of many venturi orifices balance flow meters according to claim 1, it is characterised in that：Many venturi orifice plates
(4) inside is provided with venturi orifices (6), and the venturi orifices (6) include venturi (61), and the left side of the venturi (61) is fixed and connected
Parking Entrance (62) is connected to, diffuser (63) is fixedly connected with the right side of the venturi (61).
3. a kind of many venturi orifices balance flow meters according to claim 1, it is characterised in that：Measurement body (1)
It is upper to be connected on positive pressure tappings and negative pressure tappings with positive pressure tappings and negative pressure tappings, and pressure pipe (5).
4. a kind of many venturi orifices balance flow meters according to claim 2, it is characterised in that：The Parking Entrance (62)
Angle [alpha] is more than the angle beta of diffuser (63), and the angle [alpha] of Parking Entrance (62) is 40 ° to 90 °, and the angle beta of diffuser (63) is
10 ° to 90 °.
5. a kind of many venturi orifices balance flow meters according to claim 2, it is characterised in that：The venturi orifices (6)
At least provided with 7.
6. a kind of many venturi orifices balance flow meters according to claim 1 and 2, it is characterised in that：Many venturi
Venturi orifices (6) width at orifice plate (4) center is consistent with balance flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207611.7A CN106802169A (en) | 2017-03-31 | 2017-03-31 | A kind of many venturi orifices balance flow meters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207611.7A CN106802169A (en) | 2017-03-31 | 2017-03-31 | A kind of many venturi orifices balance flow meters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106802169A true CN106802169A (en) | 2017-06-06 |
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ID=58981661
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710207611.7A Pending CN106802169A (en) | 2017-03-31 | 2017-03-31 | A kind of many venturi orifices balance flow meters |
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| Country | Link |
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| CN (1) | CN106802169A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311264A (en) * | 2017-08-07 | 2017-11-03 | 西南石油大学 | A kind of parallel Venturi tube cavitation apparatus |
| CN108871471A (en) * | 2018-07-25 | 2018-11-23 | 上海科洋科技股份有限公司 | A kind of balance Venturi meter |
| CN110375815A (en) * | 2018-09-21 | 2019-10-25 | 上海科洋科技股份有限公司 | A kind of special flowmeter of text |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5880378A (en) * | 1996-08-19 | 1999-03-09 | Southwest Research Institute | Critical flow venturi with variable and continuous range |
| CN202255481U (en) * | 2011-08-01 | 2012-05-30 | 重庆威巴仪器有限责任公司 | Novel symmetrical balanced flow meter |
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| 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 |
| CN106092221A (en) * | 2016-07-29 | 2016-11-09 | 成都南方电子仪表有限公司 | A kind of fluid measurement instrument |
| CN206862424U (en) * | 2017-03-31 | 2018-01-09 | 上海科洋科技股份有限公司 | A kind of more venturi orifices balance flow meters |
-
2017
- 2017-03-31 CN CN201710207611.7A patent/CN106802169A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5880378A (en) * | 1996-08-19 | 1999-03-09 | Southwest Research Institute | Critical flow venturi with variable and continuous range |
| CN202255481U (en) * | 2011-08-01 | 2012-05-30 | 重庆威巴仪器有限责任公司 | Novel symmetrical balanced flow meter |
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| 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 |
| CN106092221A (en) * | 2016-07-29 | 2016-11-09 | 成都南方电子仪表有限公司 | A kind of fluid measurement instrument |
| CN206862424U (en) * | 2017-03-31 | 2018-01-09 | 上海科洋科技股份有限公司 | A kind of more venturi orifices balance flow meters |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311264A (en) * | 2017-08-07 | 2017-11-03 | 西南石油大学 | A kind of parallel Venturi tube cavitation apparatus |
| CN108871471A (en) * | 2018-07-25 | 2018-11-23 | 上海科洋科技股份有限公司 | A kind of balance Venturi meter |
| CN110375815A (en) * | 2018-09-21 | 2019-10-25 | 上海科洋科技股份有限公司 | A kind of special flowmeter of text |
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