CN107796450A - A kind of differential pressure flowmeter - Google Patents
A kind of differential pressure flowmeter Download PDFInfo
- Publication number
- CN107796450A CN107796450A CN201610753638.1A CN201610753638A CN107796450A CN 107796450 A CN107796450 A CN 107796450A CN 201610753638 A CN201610753638 A CN 201610753638A CN 107796450 A CN107796450 A CN 107796450A
- Authority
- CN
- China
- Prior art keywords
- connecting tube
- plate body
- orifice plate
- packing
- sensor
- 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.)
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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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of differential pressure flowmeter, 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 differential pressure flowmeter.
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 differential pressure flowmeter, improves the scope of fluid measurement, extends flowmeter
Service life.
The purpose of the present invention is achieved through the following technical solutions：
A kind of differential pressure flowmeter, including flanged (FLGD) connecting tube, straight length, sensor, two packing circles and two pressures
Pipe, two adjacent one end ends of flanged (FLGD) connecting tube are integral by bolt connection, and the connecting tube other end passes through flange
Disk is connected with straight length, and packing circle is respectively arranged with the end face that two connecting tubes are oppositely arranged, and orifice plate plate body is set
Between two packing circles, multiple nozzles are provided with orifice plate plate body, and be provided with what is connected with inside connecting tube in packing circle side
Air flue, pressure pipe one end connect with air flue, and the pressure pipe other end connects with sensor, packing circle opposite side inwall on be provided with
The dashpot of connection inside connecting tube, and two dashpots are corresponding with two air flues and are symmetrically distributed in the two of orifice plate plate body
Side；The nozzle is passed by the internal diameter being sequentially connected along diminution section, flat segments and the internal diameter that fluid flow direction is successively decreased along fluid flow direction
The expanding reach of increasing is formed, and the first conical section, projection and the second circle are from top to bottom disposed with the pressure inside pipe wall
Section is bored, and the reduced diameter section of first conical section and the reduced diameter section of the second conical section connect respectively at the both ends of projection,
It is articulated in after orifice plate plate body end set has hook, the hook to upwardly extend on bolt.
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, fluid is entered in the pressure pipe connected with sensor by air flue, i.e. the pressure of orifice plate plate body front and rear sides
Force value reads pressure pipe fluid pressure value to embody, due to occurring in connecting tube by the fluid after nozzle by sensor
Fluctuation equally occurs in the fluctuation of certain amplitude, the i.e. fluid in the air flue and pressure pipe on rear side of orifice plate plate body, now
The differential pressure gone out by Sensor monitoring is easy to deviation occur, and the present invention is from top to bottom disposed with the first circle inside pressure pipe
Cone section, projection and the second conical section, fluid have its reduced diameter section stream after from bottom to top flowing through the enlarged diameter section of the second conical section
Going out so that fluid speed itself further increases, and when fluid passes through projection, then in the cylindric circulation section that projection is formed
It is steady mobile, influenceed with reducing caused by fluid fluctuation, last fluid is flowed into again by it by the first conical section reduced diameter section
Enlarged diameter section flows out, and the fluid for reducing high-speed motion causes serious impact to sensor, to ensure the accurate of sensor detection
Degree.There is hook in orifice plate plate body end set, and be articulated on bolt, when orifice plate plate body is impaired seriously to be needed to change,
Two bolts are adjusted respectively so that are vacated gap between two connecting tubes, now rotated orifice plate body so that hook takes off with bolt
From, you can the orifice plate plate body more renewed, during the regulation to bolt, the present invention need to only expire without bolt is taken out completely
Pedal aperture plate plate body, which loosens, can realize rotation, eliminate complicated process of the staff when changing orifice plate plate body, significantly
Reduce the working strength of worker.
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, the conical sections of 61- first, 62- dash forward
Rise, the conical sections of 63- second, 7- sealing gaskets, 8- packing circle, 9- dashpots, 10- ring flanges, 11- straight lengths, 12- hook.
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 are from top to bottom set successively on the inwall of pressure pipe 6
It is equipped with the first conical section 61, the conical section 63 of projection 62 and second, and the reduced diameter section and second of first conical section 61
The reduced diameter section of conical section 63 connects respectively at the both ends of projection 62, has hook 12, the hook in the end set of orifice plate plate body 3
12 upwardly extend after be articulated on bolt 2.
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, fluid is entered in the pressure pipe 6 connected with sensor 5 by air flue 4, i.e. the front and rear sides of orifice plate plate body 3
Pressure value pressure pipe 6 fluid pressure value read by sensor 5 embodied, due to passing through the stream after nozzle in connecting tube 1
Know from experience the fluctuation for certain amplitude occur, i.e. the fluid in the air flue 4 and pressure pipe 6 of the rear side of orifice plate plate body 3 can equally go out
Now fluctuate, the differential pressure now detected by sensor 5 is easy to deviation occur, the present invention inside pressure pipe 6 from top to bottom according to
Secondary to be provided with the first conical section 61, the conical section 63 of projection 62 and second, fluid from bottom to top flows through the big of the second conical section 63
There is the outflow of its reduced diameter section after diameter segment so that fluid speed itself further increases, and when fluid pass through projection 62, then dashing forward
Rise in the 62 cylindric circulation sections formed and steadily move, influenceed with reducing caused by fluid fluctuation, last fluid is by the
The reduced diameter section of one conical section 61 flows into be flowed out by its enlarged diameter section again, and the fluid for reducing high-speed motion causes seriously to sensor 5
Impact, with ensure sensor 5 detect accuracy.There is hook 12 in the end set of orifice plate plate body 3, and link up with 12 and be articulated in spiral shell
On bolt 2, when orifice plate plate body 3 is impaired seriously to be needed to change, two bolts 2 are adjusted respectively so that vacated between two connecting tubes 1
Gap, now rotate orifice plate body 3 so that hook 12 departs from bolt 2, you can the orifice plate plate body 3 more renewed, to bolt 2
Regulation during, for the present invention without bolt 2 be taken out completely, need to only meet that orifice plate plate body 3 loosens can realize rotation,
Complicated process of the staff when changing orifice plate plate body 3 is eliminated, greatly reduces the working strength of worker.
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 differential pressure flowmeter, including flanged (FLGD) connecting tube（1）, straight length（11）, sensor（10）, two packing circles
（8）And two pressure pipes（6）, it is characterised in that：Two flanged (FLGD) connecting tubes（1）Adjacent one end end is 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 connecting tubes
（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）Between, hole
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）, take
Pressure pipe（6）One end and air flue（4）Connection, pressure pipe（6）The other end and sensor（10）Connection, enclosed in packing（8）In opposite side
It is provided with wall and connecting tube（1）The dashpot of inside connection（9）, and two dashpots（9）With two air flues（4）It is corresponding and right
Title is distributed in orifice plate plate body（3）Both sides；It is diminution section that the nozzle is successively decreased by the internal diameter that is sequentially connected along fluid flow direction, straight
Section and internal diameter flow to incremental expanding reach along fluid and formed, in the pressure pipe（6）From top to bottom it is disposed with inwall
First conical section（61）, projection（62）And second conical section（63）, and first conical section（61）Reduced diameter section and
Second conical section（63）Reduced diameter section respectively at projection（62）Both ends connection, in orifice plate plate body（3）End set has hook
（12）, the hook（12）Bolt is articulated in after upwardly extending（2）On.
A kind of 2. differential pressure flowmeter according to claim 1, it is characterised in that：The rounded array of multiple nozzles and
Respectively in orifice plate plate body（3）On.
A kind of 3. differential pressure flowmeter according to claim 1, it is characterised in that：In the orifice plate plate body（3）Both ends end
Portion is 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 |
|---|---|---|---|
| CN201610753638.1A CN107796450A (en) | 2016-08-30 | 2016-08-30 | A kind of differential pressure flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753638.1A CN107796450A (en) | 2016-08-30 | 2016-08-30 | A kind of differential pressure flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107796450A true CN107796450A (en) | 2018-03-13 |
Family
ID=61529040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753638.1A Withdrawn CN107796450A (en) | 2016-08-30 | 2016-08-30 | A kind of differential pressure flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107796450A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118050057A (en) * | 2024-04-10 | 2024-05-17 | 河南新航流量仪表有限公司 | V-cone flowmeter |
-
2016
- 2016-08-30 CN CN201610753638.1A patent/CN107796450A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118050057A (en) * | 2024-04-10 | 2024-05-17 | 河南新航流量仪表有限公司 | V-cone flowmeter |
| CN118050057B (en) * | 2024-04-10 | 2024-07-02 | 河南新航流量仪表有限公司 | V-cone flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180313 |
|
| WW01 | Invention patent application withdrawn after publication |