CN208155373U - Throttling set based on function orifice plate - Google Patents
Throttling set based on function orifice plate Download PDFInfo
- Publication number
- CN208155373U CN208155373U CN201820826761.6U CN201820826761U CN208155373U CN 208155373 U CN208155373 U CN 208155373U CN 201820826761 U CN201820826761 U CN 201820826761U CN 208155373 U CN208155373 U CN 208155373U
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- Prior art keywords
- orifice plate
- pipe
- function
- measurement pipe
- function orifice
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- 238000005259 measurement Methods 0.000 claims abstract description 56
- 238000011144 upstream manufacturing Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a kind of throttling sets based on function orifice plate, including measurement pipe and the function orifice plate in disk form being arranged in the measurement pipe, the axis of the function orifice plate is overlapped with the measurement pipe axis, function hole is distributed on the function orifice plate, the tube wall of the measurement pipe is equipped with coupled logical positive pressure pipe and negative pressure pipe, and the positive pressure pipe and negative pressure pipe are located at the left and right sides of the function orifice plate.The utility model can effectively shorten the length of measurement pipe, improve range ratio, prolong the service life, and improve measurement accuracy.
Description
Technical field
The utility model relates to differential field of measuring technique, fill more particularly to a kind of throttling based on function orifice plate
It sets.
Background technique
Differential-pressure instrumentation based on orifice plate has very long history.Even to this day, it is also obtained in every profession and trade extensively
Using.It is based on law of conservation of energy, Bernoulli equation and flowing continuity equation, and structure is simple, easy for installation, is surveyed
Accuracy of measurement is high, and price has overwhelming superiority.Its measuring principle is that restricting element is packed into pipeline, when the stream for being full of pipeline
Body, after restricting element, fluid local contraction, flow velocity increases, and can generate pressure difference in restricting element upstream and downstream in this way, this
Pressure difference is output to flow integrator by differential pressure transmitter, obtains outflow in flow integrator internal arithmetic.
Existing throttle orifice plate apparatus has the disadvantages that：1, the straight pipe that scene needs to grow very much, if flow development length is not
It is enough, it will have a direct impact on measurement accuracy.2, its service life is short, through use after a period of time, the right angle of orifice plate aperture
Abrasion is had, abrasion is bigger, and measurement accuracy is lower, is generally used for trade settlement, it should primary to reinspection in orifice plate 1 year.3, range
Smaller, so-called range ratio, that is, the ratio between minimum discharge and maximum stream flow, the range ratio of general orifice plate is 1 ︰, 3~1 ︰ 4.In this model
In enclosing, it can be ensured that measurement accuracy can decline more than this range ratio range measurement accuracy.Crushing is big, and the crushing of orifice plate is many
It is a kind of not energy-efficient product that crushing is maximum in more differential pressure type flow instruments.
Utility model content
The purpose of this utility model is to be directed to technological deficiency existing in the prior art, and provide a kind of based on function orifice plate
Throttling set.
It is for technical solution used by realization the purpose of this utility model：
Based on the throttling set of function orifice plate, including measurement pipe and the function in disk form being arranged in the measurement pipe
Orifice plate, the axis of the function orifice plate are overlapped with the measurement pipe axis, and function hole, the letter are distributed on the function orifice plate
Number hole includes that concentric centre bore and rounded matrix are distributed in the multiple outer of the centre bore periphery with a measurement pipe
Gaging hole, the exterior measuring pore radius are less than the radius of the centre bore, the tube wall of the measurement pipe be equipped with it is coupled it is logical just
Pressure pipe and negative pressure pipe, the positive pressure pipe and negative pressure pipe are located at the left and right sides of the function orifice plate.
In the above-mentioned technical solutions, the measurement pipe is welded by upstream measurement pipe and measured downstream pipe, the upstream
The left side of measurement pipe is equipped with body flange, is machined with the first locating slot, the downstream on the right side inner wall of the upstream measurement pipe
The right side of measurement pipe is equipped with body flange, is machined with the second locating slot in the inner left wall of the measured downstream pipe, and described first
The locating slot that locating slot and the second locating slot are constituted is for fixing the function orifice plate.
In the above-mentioned technical solutions, the positive pressure pipe is welded in the measurement pipe of upstream, and the negative pressure pipe is welded on down
It swims in measurement pipe, the positive pressure pipe and the negative pressure pipe are for transmitting pressure difference signal.
In the above-mentioned technical solutions, the axis of the measurement pipe is overlapped with the axis of the body flange.
In the above-mentioned technical solutions, the both sides of the face of the function orifice plate are parallel, and the depth of parallelism is less than 0.05mm, the function
Function hole scale error on orifice plate is less than 0.01mm.
In the above-mentioned technical solutions, the body flange is connected by fastener with companion flange, the body flange
Gasket seal is equipped between the companion flange.
In the above-mentioned technical solutions, 0.125~0.15 times with a thickness of the measurement pipe diameter of the function orifice plate.
Compared with prior art, the utility model has the beneficial effects that：
1, the length of straight pipe is substantially reduced, general upstream straight pipe only needs 3D (D is measurement pipe interior diameter) downstream straight
Pipeline section only needs 1D.
2, range ratio is greatly improved, range ratio can reach 1 under normal conditions:10.
3, long service life, manufacturing cost is low, and measurement accuracy is high.
4, crushing is reduced, comparable standard orifice plate is reduced to 1/2 permanent crushing, is a kind of energy saving instrument.
5, function orifice plate itself has the function of adjusting flow field, so measurement accuracy is higher.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of the throttling set based on function orifice plate of the utility model.
It is the function hole distribution schematic diagram on function orifice plate described in Fig. 2.
Wherein：1- companion flange, 2- gasket seal, 3- body flange, 4- fastener, the upstream 5- measurement pipe, the positive pressure of 6-
Pipe, 7- negative pressure pipe, 8- measured downstream pipe, 9- body flange, 10- gasket seal, 11- companion flange, 12- function orifice plate, 13-
Centre bore, the outer gaging hole of 14-.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
A kind of throttling set based on function orifice plate including measurement pipe and is arranged in disk form in the measurement pipe
Function orifice plate 12, the axis of the function orifice plate 12 are overlapped with the measurement pipe axis, and function is distributed on the function orifice plate
Hole, the function hole include that concentric centre bore 13 and rounded matrix are distributed in outside the centre bore with a measurement pipe
The multiple outer gaging holes 14 enclosed, the radius of the outer gaging hole 14 are less than the radius of the centre bore 13, on the tube wall of the measurement pipe
Equipped with coupled logical positive pressure pipe 6 and negative pressure pipe 7, the positive pressure pipe 6 and negative pressure pipe 7 are located at the function
The left and right sides of orifice plate 12.
The intergrant of function orifice plate 12 flow conditioner and orifice plate.Why it can make up the deficiency of traditional orifice plate, just
It is the size in each hole because of these function holes, position distribution is all to calculate and obtain by floor data, therefore referred to as function
Hole.The flow velocity of pipeline center is most fast, and nearlyr pipeline edge flow velocity is lower, so the diameter of the centre bore of function orifice plate is maximum,
And the diameter in outside number hole is less than centre bore, their functional relation is that circulation area is equal, and taking the diameter of apertura lateralis is D1,
The diameter of interstitial hole is D2, the two meets following functional relation：
Wherein：N is outside function hole number, and π is pi.
When fluid passes through each function hole of function orifice plate 12, fluid is rectified by force, and flow field is made to form approximate ideal
Flow field, vortex are minimized, it is possible to obtain stable differential pressure signal.Fluid passes through each function hole of function orifice plate 12
When, the ingenious realization fluid balance measurement of energy there is no that vortex is formed, the differential pressure signal of all acquisitions does not fluctuate, flow field
After being adjusted balance, reduce the loss of fluid dynamic energy, under the premise of same Test Cycle does not reduce differential pressure value, than biography
Throttle orifice plate apparatus crushing of uniting is small by 50%, is a kind of novel energy-saving instrument to save this row cost.
Fluid is balanced by each function hole of balance hole plate, flow field, and pressure recovery is fast, is substantially shorter at the scene pair
The requirement of straight pipe, general upstream straight pipe only need 3D (D is measurement pipe interior diameter) downstream straight pipe only to need 1D.The present apparatus
When measuring, flow field balance is without vortex, therefore greatly improves range ratio, and range ratio can reach 1 under normal conditions:10.
Function orifice plate is greater than the thickness of traditional orifice plate with a thickness of 0.125D~0.15D (D is to measure pipe diameter), to reach
Two purposes.One purpose is to allow switching process in fluid by sufficiently completing when function orifice plate, if function orifice plate and conventional holes
Plate thickness is the same, then not achieving the effect that rectification also, fluid has had passed through throttling element, and the thickness of all throttling elements must be sufficient
Enough thickness.Another purpose is the thickness by increasing throttling element, can extend the service life of a whole set of instrument, a highest wisdom trade settlement
When, orifice plate must be rechecked once for 1 year, and abrasion is too big, it should just replace, but no replacement is required in 3-5 if changing function orifice plate into,
And service life can be substantially prolonged with high-acruracy survey.
It is preferred that the measurement pipe is welded by upstream measurement pipe 5 and measured downstream pipe 8, the upstream is surveyed
The left side of buret 5 is equipped with body flange 3, is machined with the first locating slot, the downstream on the right side inner wall of the upstream measurement pipe 5
The right side of measurement pipe 8 is equipped with body flange 9, is machined with the second locating slot in the inner left wall of the measured downstream pipe 8, and described the
The locating slot that a positioning groove and the second locating slot are constituted is for fixing the function orifice plate 12.
It is preferred that the positive pressure pipe 6 is welded in upstream measurement pipe 5, the negative pressure pipe 7 is welded on downstream
In measurement pipe 8, the positive pressure pipe 6 and the negative pressure pipe 7 are for transmitting pressure difference signal.
It is preferred that the axis of the measurement pipe is overlapped with the axis of the body flange.
It is preferred that the both sides of the face of the function orifice plate are parallel, the depth of parallelism is less than 0.05mm, the function orifice plate
On function hole scale error be less than 0.01mm.
The position of function hole is very crucial, due to the flow velocity of each point on pipeline section is different (pipeline center's flow velocity highest,
Flow velocity is minimum outside pipeline).So the position of function hole is calculated by uninterrupted, it must strict guarantee in processing
The position of each function reaches design requirement.Function orifice plate is put into the locating slot of measurement pipe, is then welded integral.Finishing
After the machining of work measurement pipe no matter internal diameter, surface roughness, ovality is all guaranteed, before this is high-acruracy survey
It mentions, the unique design of balance hole plate and high-precision processing can obtain high-acruracy survey effect.
It is preferred that the body flange 3,9 is connected by fastener 4 with companion flange 1,11, the ontology
Gasket seal 2,10 is equipped between flange and the companion flange.
The welding end diameter and process pipe of the companion flange 1,11 weld, the sealing surface of the companion flange 1,11 and institute
Body flange 3,9 is stated to be connected.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (7)
1. the throttling set based on function orifice plate, which is characterized in that including measurement pipe and be arranged in the measurement pipe in circle
The function orifice plate of dish type, the axis of the function orifice plate are overlapped with the measurement pipe axis, and letter is distributed on the function orifice plate
Number hole, the function hole includes that concentric centre bore and rounded matrix are distributed in outside the centre bore with a measurement pipe
The multiple outer gaging holes enclosed, the exterior measuring pore radius are less than the radius of the centre bore, and the tube wall of the measurement pipe is equipped with and it
The positive pressure pipe and negative pressure pipe being connected, the positive pressure pipe and negative pressure pipe are located at the left and right two of the function orifice plate
Side.
2. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the measurement pipe is measured by upstream
Pipe and measured downstream pipe are welded, and the left side of the upstream measurement pipe is equipped with body flange, the right side of the upstream measurement pipe
The first locating slot is machined on inner wall, the right side of the measured downstream pipe is equipped with body flange, the left side of the measured downstream pipe
The second locating slot is machined on inner wall, the locating slot that first locating slot and the second locating slot are constituted is for fixing the function
Orifice plate.
3. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the positive pressure pipe is welded on
It swims in measurement pipe, the negative pressure pipe is welded on measured downstream pipe, and the positive pressure pipe and the negative pressure pipe are for transmitting
Pressure difference signal.
4. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the axis of the measurement pipe and institute
The axis for stating body flange is overlapped.
5. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the two side ends of the function orifice plate
Face is parallel, and the depth of parallelism is less than 0.05mm, and the function hole scale error on the function orifice plate is less than 0.01mm.
6. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the body flange passes through fastening
Part is connected with companion flange, and gasket seal is equipped between the body flange and the companion flange.
7. the throttling set as described in claim 1 based on function orifice plate, which is characterized in that the function orifice plate with a thickness of
0.125~0.15 times of the measurement pipe diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820826761.6U CN208155373U (en) | 2018-05-31 | 2018-05-31 | Throttling set based on function orifice plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820826761.6U CN208155373U (en) | 2018-05-31 | 2018-05-31 | Throttling set based on function orifice plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208155373U true CN208155373U (en) | 2018-11-27 |
Family
ID=64388577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820826761.6U Expired - Fee Related CN208155373U (en) | 2018-05-31 | 2018-05-31 | Throttling set based on function orifice plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208155373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215851A (en) * | 2020-01-18 | 2020-06-02 | 常州可威尔仪表制造有限公司 | Production process of orifice plate differential pressure device part |
-
2018
- 2018-05-31 CN CN201820826761.6U patent/CN208155373U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215851A (en) * | 2020-01-18 | 2020-06-02 | 常州可威尔仪表制造有限公司 | Production process of orifice plate differential pressure device part |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |