CN107796449A - A kind of high-precision balance flow meter - Google Patents
A kind of high-precision balance flow meter Download PDFInfo
- Publication number
- CN107796449A CN107796449A CN201610753617.XA CN201610753617A CN107796449A CN 107796449 A CN107796449 A CN 107796449A CN 201610753617 A CN201610753617 A CN 201610753617A CN 107796449 A CN107796449 A CN 107796449A
- Authority
- CN
- China
- Prior art keywords
- connecting tube
- plate body
- orifice plate
- packing
- air flue
- 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.)
- Withdrawn
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Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details 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
- G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure
- G01F15/105—Preventing damage by hydraulic shocks
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of high-precision balance flow meter, including connecting tube, straight length, sensor, two packing circles and two pressure pipes, two connecting tubes are integral by bolt connection, the connecting tube other end is logical to be connected with straight length, packing circle is provided with the end face of two connecting tubes, orifice plate plate body is arranged between two packing circles, multiple nozzles are provided with orifice plate plate body, the air flue connected with inside connecting tube is provided with packing circle side, pressure pipe one end connects with air flue, the pressure pipe other end connects with sensor, the dashpot connected with inside connecting tube is provided with packing circle opposite side inwall, the diminution section that nozzle is successively decreased by the internal diameter being sequentially connected along fluid flow direction, flat segments and internal diameter flow to incremental expanding reach along fluid and formed.Connected between connecting tube and connecting tube, between connecting tube and straight length using flange, substantially increase practicality of the connecting tube in different types of sensor measurement process, facilitate staff's Fast Installation to dismantle.
Description
Technical field
The present invention relates to field of flow measurement, in particular to a kind of high-precision balance flow meter.
Background technology
Differential pressure flowmeter with its technology maturation, it is simple in construction, reliable and stable, using face it is wide the characteristics of occupy flowmeter and make
Use forefront.Differential pressure flowmeter is that basis is installed in pipeline differential pressure caused by flow detection part, known fluid condition and inspection
The physical dimension of part and pipeline is surveyed to measure the instrument of flow；But the measuring range scope of this differential pressure flowmeter is narrower,
Because flow instrument signal（Differential pressure）In chi square function relation, the range ability of flow measurement is so limited.At present, spray
The most frequently used form of nozzle of mouth flowmeter has calibrating nozzle, Long Nozzle, Venturi nozzle etc., these throttling form generally existings
Following shortcoming：The repeatability of measurement, accuracy mean level in flowmeter, because the factor of many influences intricate, essence
Degree is difficult to improve；In-site installation condition requires higher, it is necessary to longer straight length, it is difficult to meets, the pressure loss is bigger.
The content of the invention
It is an object of the invention to provide a kind of high-precision balance flow meter, improves the scope of fluid measurement, extends flow
The service life of meter.
The purpose of the present invention is achieved through the following technical solutions：
A kind of high-precision balance flow meter, including flanged (FLGD) connecting tube, straight length, sensor, two packing circles and two
Pressure pipe, two adjacent one end ends of flanged (FLGD) connecting tube are integral by bolt connection, and the connecting tube other end passes through
Ring flange is connected with straight length, and packing circle, orifice plate plate body are respectively arranged with the end face that two connecting tubes are oppositely arranged
It is arranged between two packing circles, multiple nozzles is provided with orifice plate plate body, and be provided with connecting inside connecting tube in packing circle side
Logical air flue, pressure pipe one end connect with air flue, and the pressure pipe other end connects with sensor, are opened on packing circle opposite side inwall
There is the dashpot with being connected inside connecting tube, and two dashpots are corresponding with two air flues and are symmetrically distributed in orifice plate plate body
Both sides；Diminution section, flat segments and the internal diameter that the nozzle is successively decreased by the internal diameter being sequentially connected along fluid flow direction flow to along fluid
Incremental expanding reach is formed, and is articulated in after orifice plate plate body end set has hook, the hook to upwardly extend on bolt, in institute
State and stereotype layer is installed on air flue inwall.
The present invention is entered by multiple nozzles on orifice plate plate in use, fluid is entered in connecting tube by straight length
In another connecting tube, and now a fluid stream forms local contraction on front side of orifice plate plate body, and then causes the flow velocity increase of fluid, quiet
Pressure is reduced, i.e., pressure difference is generated between the front side of orifice plate plate body and rear side, and fluid flow is bigger, and caused pressure difference is bigger,
Now sensor passes through the measurement of pressure pipe and air flue to orifice plate plate body front and rear sides pressure, you can calculates the flow of fluid
Size.Wherein, the multiple nozzles set on orifice plate plate body flow to the diminution section successively decreased along fluid by the internal diameter being sequentially connected, put down
Straight section and internal diameter flow to incremental expanding reach along fluid and formed, and fluid in nozzle interior by accelerating, at the uniform velocity and slow down
After three motion states, now the flow field before and after orifice plate plate body is tended to balance, and avoids orifice plate plate body front and rear sides from vortex occur, shake
Dynamic and signal noise, substantially increase the stability in flow field；And between connecting tube and connecting tube, between connecting tube and straight length
Connected using flange, substantially increase practicality of the connecting tube in different types of sensor measurement process, convenient work
Personnel's Fast Installation is dismantled.And the dashpot being opened in packing circle side wall will can be impacted on orifice plate plate body front and rear sides
Fluid guiding is opened, and is reduced the impact dynamics on the end face of orifice plate plate body front and rear sides, is reduced in the diminution section and expanding reach of nozzle
The wadding stream shearing force being subject to, realize the purpose for extending orifice plate plate body service life.
Wherein, there is hook in orifice plate plate body end set, and be articulated on bolt, seriously needed when orifice plate plate body is impaired
When changing, two bolts are adjusted respectively so that are vacated gap between two connecting tubes, are now rotated orifice plate body so that hang
Hook departs from bolt, you can the orifice plate plate body more renewed, during the regulation to bolt, the present invention is without bolt is taken completely
Go out, need to only meet that orifice plate plate body loosens can realize rotation, eliminate complexity of the staff when changing orifice plate plate body
Program, greatly reduce the working strength of worker.Fluid high-speed motion in air flue, while produce friction with air flue inwall and grow
Raw a large amount of noises, noise are passed out by insulating circle, significantly impact measuring environment, and the present invention sets stereotype on air flue inwall
Layer, weaken fluid caused transmission acoustic energy in air flue using the fine and close outer wall of stereotype, to prevent substantial amounts of noise to unofficial biography
Pass, while and can avoids the kinetic energy loss of fluid, to ensure the accuracy of the pressure value collected in the sensor.
The rounded array of multiple nozzles and divide equally on orifice plate plate body.Equally distributed multiple nozzles can reduce orifice plate
The wadding stream shearing force and form the possibility being vortexed that plate body is directly subject to, reduce dynamic loss of energy, orifice plate are protected realizing
While plate body, the purpose of energy-conservation is realized.
The junction of the orifice plate plate body both ends end and packing circle is provided with the L-type sealing gasket for sealing.For side
Just application of the connecting tube between different types of sensor, orifice plate plate body are clamped in by the cooperation of bolt and packing circle
Between two connecting tubes, while the part that packing circle contacts respectively on the both ends of orifice plate plate body is carried out using the sealing gasket of L-type
Sealing, being fully sealed in connecting tube is realized, the data collected in ensureing two pressure pipes in air flue are accurate.
The present invention compared with prior art, has the following advantages and advantages：
1st, the dashpot that the present invention is opened in packing circle side wall can draw the fluid impacted on orifice plate plate body front and rear sides
Lead out, reduce the impact dynamics on the end face of orifice plate plate body front and rear sides, reduce what is be subject in the diminution section and expanding reach of nozzle
Wadding stream shearing force, realizes the purpose for extending orifice plate plate body service life；
2nd, the equally distributed multiple nozzles of the present invention can reduce the wadding stream shearing force and formation vortex that orifice plate plate body is directly subject to
Possibility, reduce dynamic loss of energy, realize protect orifice plate plate body while, realize the purpose of energy-conservation；
3rd, the present invention passes through bolt and packing for convenience of application of the connecting tube between different types of sensor, orifice plate plate body
The cooperation of circle is clamped between two connecting tubes, while will be insulated respectively on the both ends of orifice plate plate body using the sealing gasket of L-type
The part of circle contact is sealed, and realizes being fully sealed in connecting tube, is collected in ensureing two pressure pipes in air flue
Data are accurate.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Mark and corresponding parts title in accompanying drawing：
1- connecting tubes, 2- bolts, 3- orifice plates plate body, 4- air flues, 5- inductors, 6- pressure pipes, 7- sealing gaskets, 8- packings circle, 9-
Dashpot, 10- ring flanges, 11- straight lengths, 12- hooks.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in figure 1, the present embodiment includes flanged (FLGD) connecting tube 1, straight length 11, sensor, two packing circles 8 and two
Pressure pipe 6, two adjacent one end ends of flanged (FLGD) connecting tube 1 are linked into an integrated entity by bolt 2, the other end of connecting tube 1
It is connected by ring flange 10 with straight length 11, packing circle is respectively arranged with the end face that two connecting tubes 1 are oppositely arranged
8, orifice plate plate body 3 is arranged between two packing circles 8, multiple nozzles is provided with orifice plate plate body 3, and be provided with 8 sides of packing circle
The air flue 4 connected with the inside of connecting tube 1, the one end of pressure pipe 6 connect with air flue 4, and the other end of pressure pipe 6 connects with sensor,
The dashpot 9 connected with the inside of connecting tube 1, and two dashpots 9 and two phases of air flue 4 are provided with packing 8 opposite side inwalls of circle
Correspond to and be symmetrically distributed in the both sides of orifice plate plate body 3；The diminution that the nozzle is successively decreased by the internal diameter being sequentially connected along fluid flow direction
Section, flat segments and internal diameter flow to incremental expanding reach along fluid and formed, and have hook 12 in the end set of orifice plate plate body 3, described
Hook 12 is articulated on bolt 2 after upwardly extending, and stereotype layer is provided with the inwall of air flue 4.
The present invention is in use, fluid is entered in connecting tube 1 by straight length 11, by multiple nozzles entrance on orifice plate plate
Into another connecting tube 1, and now a fluid stream forms local contraction in the front side of orifice plate plate body 3, and then the flow velocity of fluid is increased
Add, static pressure reduces, i.e., pressure difference is generated between the front side of orifice plate plate body 3 and rear side, fluid flow is bigger, caused pressure difference
Bigger, now sensor passes through the measurement of pressure pipe 6 and air flue 4 to the front and rear sides pressure of orifice plate plate body 3, you can calculates stream
The uninterrupted of body.Wherein, the multiple nozzles set on orifice plate plate body 3 successively decrease by the internal diameter being sequentially connected along fluid flow direction
Reduce section, flat segments and internal diameter flow to incremental expanding reach along fluid and formed, and fluid nozzle interior by accelerating, at the uniform velocity
And after three motion states of slowing down, now the flow field before and after orifice plate plate body 3 is tended to balance, and avoids the front and rear sides of orifice plate plate body 3
There is vortex, vibration and signal noise, substantially increase the stability in flow field；And between connecting tube 1 and connecting tube 1, connection
Connected between pipe 1 and straight length 11 using flange, substantially increase connecting tube 1 in different types of sensor measurement process
Practicality, facilitate staff's Fast Installation dismantle.And the dashpot 9 being opened in packing 8 side walls of circle will can impact
Fluid guiding on the front and rear sides of orifice plate plate body 3 is opened, and is reduced the impact dynamics on the front and rear sides end face of orifice plate plate body 3, is reduced spray
The wadding stream shearing force being subject in the diminution section and expanding reach of mouth, realize the purpose for extending the service life of orifice plate plate body 3.
Wherein, have a hook 12 in the end set of orifice plate plate body 3, and link up with 12 and be articulated on bolt 2, when orifice plate plate body 3 by
When damage is serious to be needed to change, two bolts 2 are adjusted respectively so that are vacated gap between two connecting tubes 1, now rotated orifice plate sheet
Body 3 so that hook 12 departs from bolt 2, you can the orifice plate plate body 3 more renewed, during the regulation to bolt 2, the present invention
Without bolt 2 is taken out completely, need to only meet that orifice plate plate body 3 loosens can realize rotation, eliminate staff more
Complicated process during orifice plate plate body 3 is changed, greatly reduces the working strength of worker.Fluid high-speed motion in air flue 4, while with
The inwall of air flue 4 produces friction and grows a large amount of noises, and noise is passed out by insulating circle 8, significantly impacts measuring environment, this hair
It is bright that stereotype layer is set on the inwall of air flue 4, weaken fluid caused transmission sound in air flue 4 using the fine and close outer wall of stereotype
Can, to prevent substantial amounts of noise from outwards transmitting, while and can avoids the kinetic energy loss of fluid, to ensure to be adopted in sensor 5
The accuracy of the pressure value collected.
In the present embodiment, the rounded array of the multiple nozzles and divide equally on orifice plate plate body 3.Equally distributed multiple sprays
Mouth can reduce the wadding that orifice plate plate body 3 is directly subject to and flow shearing force and form the possibility of vortex, reduce dynamic loss of energy,
While realizing protection orifice plate plate body 3, the purpose of energy-conservation is realized.
The junction of the both ends end of orifice plate plate body 3 and packing circle 8 is provided with the L-type sealing gasket 7 for sealing.For
Facilitate application of the connecting tube 1 between different types of sensor, orifice plate plate body 3 passes through bolt 2 and the cooperation quilt of packing circle 8
It is clamped between two connecting tubes 1, while the contact of circle 8 will be insulated on the both ends of orifice plate plate body 3 respectively using the sealing gasket 7 of L-type
Part sealed, realize being fully sealed in connecting tube 1, the data collected in ensureing two pressure pipes 6 in air flue 4
Accurately.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of high-precision balance flow meter, including flanged (FLGD) connecting tube（1）, straight length（11）, sensor（10）, two envelopes
Spacer ring（8）And two pressure pipes（6）, it is characterised in that：Two flanged (FLGD) connecting tubes（1）Adjacent one end end by
Bolt（2）Link into an integrated entity, connecting tube（1）The other end passes through ring flange（10）With straight length（11）Connection, in two companies
Adapter（1）Packing circle is respectively arranged with the end face being oppositely arranged（8）, orifice plate plate body（3）It is arranged on two packing circles（8）It
Between, orifice plate plate body（3）On be provided with multiple nozzles, and enclosed in packing（8）Side is provided with and connecting tube（1）The air flue of inside connection
（4）, pressure pipe（6）One end and air flue（4）Connection, pressure pipe（6）The other end and sensor（10）Connection, enclosed in packing（8）Separately
It is provided with the inwall of side and connecting tube（1）The dashpot of inside connection（9）, and two dashpots（9）With two air flues（4）Relatively
Orifice plate plate body and should be symmetrically distributed in（3）Both sides；The diminution that the nozzle is successively decreased by the internal diameter being sequentially connected along fluid flow direction
Section, flat segments and internal diameter flow to incremental expanding reach along fluid and formed, in orifice plate plate body（3）End set has hook（12）,
The hook（12）Bolt is articulated in after upwardly extending（2）On, in the air flue（4）Stereotype layer is installed on inwall.
A kind of 2. high-precision balance flow meter according to claim 1, it is characterised in that：Multiple rounded battle arrays of the nozzle
Arrange and divide equally in orifice plate plate body（3）On.
A kind of 3. high-precision balance flow meter according to claim 1, it is characterised in that：In the orifice plate plate body（3）Two
End is held to be enclosed with packing（8）Junction be provided with L-type sealing gasket for sealing（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753617.XA CN107796449A (en) | 2016-08-30 | 2016-08-30 | A kind of high-precision balance flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753617.XA CN107796449A (en) | 2016-08-30 | 2016-08-30 | A kind of high-precision balance flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107796449A true CN107796449A (en) | 2018-03-13 |
Family
ID=61529100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753617.XA Withdrawn CN107796449A (en) | 2016-08-30 | 2016-08-30 | A kind of high-precision balance flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107796449A (en) |
-
2016
- 2016-08-30 CN CN201610753617.XA patent/CN107796449A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180313 |