CN109425399A - Coriolis mass flowmeters and its sensor module - Google Patents
Coriolis mass flowmeters and its sensor module Download PDFInfo
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- CN109425399A CN109425399A CN201710748980.7A CN201710748980A CN109425399A CN 109425399 A CN109425399 A CN 109425399A CN 201710748980 A CN201710748980 A CN 201710748980A CN 109425399 A CN109425399 A CN 109425399A
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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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
- G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
- G01F1/8481—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having loop-shaped measuring conduits, e.g. the measuring conduits form a loop with a crossing point
- G01F1/8486—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having loop-shaped measuring conduits, e.g. the measuring conduits form a loop with a crossing point with multiple measuring conduits
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of coriolis mass flowmeters sensor modules, flowmeter has the downstream line connector for connecting the upstream line connector of upstream fluid pipeline and for connecting downstream fluid pipeline, the axis of upstream line connector and downstream line connector is located on same central axes, sensor module is installed in the shell of flowmeter, it includes the oscillating component being separated by vibration insulation structure and non-vibration part, vibration insulation structure includes at least the first vibration piece that fluid flow pipe is separated into vibration pipeline and non-vibration pipeline, first vibration piece is arranged close to central axes.The present invention is by the way that the first vibration piece to be arranged close to central axes, so that the distance of the first vibration piece to the central axes of upstream and downstream pipe joint is shorter, if oscillating component has vibration to leak out, it is so also shorter in the distance of the axis of the exciting force of vibration isolation on piece formation to upstream and downstream link position, rotation will not be generated because of the bias of exciting force.
Description
Technical field
The present invention relates to coriolis mass flowmeters, and in particular to a kind of fluid stream with series dual loop piping
Move the sensor module of pipe and the coriolis mass flowmeters with the sensor module.
Background technique
Coriolis mass flowmeters are a kind of instrument for directly critically measuring fluid flow.Typical Coriolis matter
Measure flowmeter structure main body use two U-tubes side by side, allow two root canals under its resonant frequency with same frequency and reversed-phase vibrate, i.e., they
It can draw close or open simultaneously simultaneously.If directed fluid into pipe while vibrating tube synchronous vibration, it is allowed to along pipe forward
Flowing, then vibrating tube vibrates forced fluid therewith.Fluid in order to revolt this forced vibration, can to vibrating tube one with
The vertical reaction force in its flow direction, it is this be called Coriolis effect under the action of, vibrating tube by generate torsion become
Shape, fluid inlet section pipe and fluid outlet section pipe can be variant in the time order and function of vibration, and it is poor that this is called phase time, this difference
It is different directly proportional to the size for the liquid mass flow for flowing through vibrating tube.It, can if the size of this time difference can be detected
The size of mass flow is determined.Coriolis mass flowmeters are exactly to be made according to above-mentioned principle.
Currently, can be divided into single tube type and shaped double tube according to the vibrating tube quantity in sensor, single tube type instrument is not shunted,
Flow is equal everywhere in measurement pipe, has outside to balanced null point, is also convenient for cleaning, but the interference vulnerable to extraneous vibration, be detected in
The product of early stage and some small-bore instrument.Shaped double tube instrument had both realized the measurement of two-tube phase difference, has also increased big signal and has increased
It is strong linearly, while reducing the influence of extraneous vibration interference.Straight and curved can be roughly divided into according to the tubular-shaped structures of sensor
Tubular, Straight instrument is not easy to stockpile gas, and flow sensor size is small, light-weight.But natural frequency of vibration high RST is not easy to detect,
To make the natural frequency of vibration be unlikely to too high, often tube wall is made relatively thin, vulnerable to abrasion and corrosion.The instrument piping of elbow-shaped detection pipe
Rigidity is low, and it is relatively large to generate signal, technology also relative maturity.Because the natural frequency of vibration is also low (80-150Hz), can using compared with
Thick tube wall, instrument is wear-resisting, corrosion resistance is preferable, but easily stockpiles gas and residue causes additive error to be cut has to installation space
It is required that.
Currently on the market it is more mature it is tubular be double Π type pipe structures, because its structure is simple, manufacture is easy, sensitivity
Moderate, the stronger feature of impact resistance makes presently the most economic sensor structure.
But when mass flowmenter is applied to food and medical field, then double Π type pipe structures are not used substantially, it is former
Because being: firstly, food and medical field have hygienic requirements, as cannot have shunt conduit inside the flowmeter of metering；Its
It is secondary, if doing Π shape form of tubes with single tube, multi-modal coupling can occur because of internal pipeline complexity, influence performance, therefore, generally
Single tube or non-Π shape pipe structure can only be used for the mass flowmenter of food and medical field, This reduces both measuring accuracy,
Also counteract the popularization of mass flowmenter.
To solve the above-mentioned problems, there are a kind of double Π type single tube sensors with not flow dividing structure in the prior art
Coriolis mass flowmeters, as disclosed in Chinese patent literature CN1116588C with continuous fluid flow pipe section in
Benefit mass flowmenter difficult to understand, fluid flow pipe have dual loop, flow through from fluid and receive input pipe used in fluid from pipeline
Fluid is returned to fluid and flows through output pipe used in material, and surrounds the shell of dual loop by road, flow meter assembly tool
Have: second loop with first and second ends of the configuration in fluid flow pipe, by first end from the first loop
The second end receives fluent material, is guided fluent material to output pipe by the second end；In fluid flow pipe
Bridging section, it is guided streaming flow to the second loop by the first loop；It is fixedly connected on shell and fluid flow pipe
Fixed connecting part；And it is connected to the support rod of the first loop and the second loop.
However, there are still following defects in actual use for the prior art: 1, in the prior art, vibration isolation piece is apart from upper
The vertical range of downstream line connector central axes is longer, causes when oscillating component has vibration to leak out, then in vibration isolation piece
Vertical range of the exciting force of upper formation apart from upstream and downstream pipe joint central axes is also longer, causes to produce because of the bias of exciting force
Raw rotation.2, in the prior art, upstream and downstream pipeline is respectively positioned on for the oscillating component of its sensor module and non-vibration part
On the central axes of connector, lead to vertical range of the center of gravity of sensor module apart from the axis of upstream and downstream pipe joint farther out,
To cause that non-vibration part can be caused to vibrate, influence to flow when the oscillating component of sensor module occurs vibrating and leak
The stability of meter.
Summary of the invention
The object of the present invention is to provide a kind of coriolis mass flowmeters and its sensor modules, to solve the prior art
Middle coriolis flowmeter haves the defects that generate rotation because of the bias of exciting force.
For this purpose, in a first aspect, the present invention provides a kind of coriolis mass flowmeters sensor module, feature exists
In the flowmeter has for connecting the upstream line connector of upstream fluid pipeline and for connecting under downstream fluid pipeline
Pipe joint is swum, the axis of the upstream line connector and the downstream line connector is located on same central axes, the sensing
Device assembly is installed in the shell of the flowmeter comprising the oscillating component being separated by vibration insulation structure and non-vibration portion
Point, the vibration insulation structure includes at least the first vibration isolation that the fluid flow pipe is separated into vibration pipeline and non-vibration pipeline
Part, first vibration piece are arranged close to the central axes.
Preferably, first vibration piece is located above or below the central axes, first vibration piece with it is described
The vertical range of central axes is 0-20mm.
Preferably, the vertical range of first vibration piece and the central axes is 0-10mm.
Preferably, the oscillating component and the non-vibration part are the vibration relative to the moment difference of the central axes
The 0-20% of the central axes moment values is arrived in dynamic part.
Preferably, the oscillating component and the non-vibration part are relative to horizontal locating for first vibration piece
Moment difference is 0.
Preferably, sensor module includes
Fluid flow pipe, have fluid input lines and fluid outlet line and be connected on the fluid input lines and
Dual loop piping between fluid outlet line；The dual loop piping is divided into vibration pipeline by the vibration insulation structure
With non-vibration pipeline；
Exciting bank is arranged on the vibrating tube road, for driving the vibration pipeline vibration；
Detection device is arranged on the vibrating tube road, for detecting the relative velocity of the vibration pipeline；
Increase weight structure, is arranged on the non-vibration pipeline；
The exciting bank, the vibration pipeline and the detection device constitute the oscillating component；The weight gain structure,
The non-vibration pipeline constitutes the non-vibration part.
Preferably, the dual loop piping includes the first loop connecting with the fluid input lines and the stream
Second loop of body efferent duct connection, plane locating for first loop is parallel with plane locating for the second loop, and described the
One loop is connect with second loop by crossover line.
Preferably, the exciting bank includes the driving line that the intermediate position of two loops of the vibration pipeline is arranged in
Circle；And/or the detection device includes that the corresponding corner portion of the top section of two loops of the vibration pipeline is arranged in
First detection sensor and the second detection sensor.
Preferably, the weight gain structure is the clump weight being fixedly mounted on the non-vibration pipeline.
Preferably, the material of the fluid flow pipe is one of stainless steel, Hastelloy, titanium alloy；And/or institute
The material for stating clump weight is one of stainless steel, Hastelloy, titanium alloy, spheroidal graphite cast-iron.
Preferably, the clump weight accounts for the non-vibration at a distance from the vibration pipeline root on the non-vibration pipeline
The 30%-50% of the dynamic vertical development length of pipeline.
Preferably, the clump weight is the outstanding support that level is erected on the non-vibration pipeline, and the outstanding support is described
The horizontal direction of non-vibration pipeline is symmetrical set.
Preferably, the outstanding support is with certain thickness rectangular block.
Preferably, the bulk one that the minimum length and width dimensions of the rectangular block and the non-vibration pipeline outer edge are formed
It causes.
Preferably, 0.5-1.5 times of the single conduit outer diameter with a thickness of the non-vibration pipeline of the rectangular block.
Preferably, 1 times of the single conduit outer diameter with a thickness of the non-vibration pipeline of the rectangular block.
Preferably, the flow direction according to fluent material in the fluid flow pipe, the outstanding support, which is equipped with, supplies first ring
First through hole, the second through-hole and the third through-hole that road is worn, and equipped with the fourth hole worn for second loop, the 5th
Through-hole and the 6th through-hole, wherein the outstanding support back edge is arranged in the second through-hole and third through-hole of first loop
The left and right sides and be symmetrical arranged, the fourth hole and fifth hole of second loop be arranged in it is described it is outstanding support front edge a left side
Right two sides and be symmetrical arranged, the first through hole of first loop and the 6th through-hole of the second loop between other through-holes and
It is symmetrical set.
A kind of coriolis mass flowmeters, comprising:
Shell；
Sensor module is installed on the enclosure interior；
The sensor module is the sensor component.
Advantages of the present invention:
1, coriolis mass flowmeters sensor module provided by the invention, the upstream line connector of flowmeter is under
The axis of trip pipe joint is located on same central axes, and sensor module includes the oscillating component being separated by vibration insulation structure
With non-vibration part, the vibration insulation structure, which is included at least, is separated into vibration pipeline and non-vibration pipeline for the fluid flow pipe
First vibration piece, the present invention is by the way that the first vibration piece to be arranged close to the central axes, so that the first vibration piece is to upper and lower play pipe
The distance of the central axes of road connector is shorter, if oscillating component has vibration to leak out, then the exciting force formed in vibration isolation on piece
Distance to the axis of upstream and downstream link position is also shorter, will not generate rotation because of the bias of exciting force.
2, coriolis mass flowmeters sensor module provided by the invention, downstream line connector is located at same thereon
On central axes, sensor module is separated into oscillating component and non-vibration part by vibration insulation structure, and the present invention is by by sensor
The center of gravity of component is generally on the central axes, so that when oscillating component vibration occurs and leaks, due to the weight of sensor module
The heart is as close as possible to or positioned on the central axes of upstream and downstream pipe joint, to reduce sensor around the axis of upstream and downstream link position
The radius of gyration.Therefore, no matter the oscillating component of sensor leaks because which kind of reason generates vibration, is all difficult to cause entirely to sense
The non-vibration part of device vibrates, and improves the stability of flowmeter.
3, coriolis mass flowmeters sensor module provided by the invention, the oscillating component and the non-vibration
Part is the oscillating component to the horizontal torque relative to horizontal moment difference locating for first vibration piece
The 0-20% of value.It is arranged by this kind, so that if oscillating component generation is vibrated when leaking, due to oscillating component and non-vibration part
The horizontal moment difference of opposite first vibration piece is smaller, can offset substantially, be conducive to the stability for improving flowmeter.
4, coriolis mass flowmeters sensor module provided by the invention, since its fluid flow pipe is with dual
Loop piping, therefore sensor module provided by the invention is a kind of double-tube type instrument, has both realized the measurement of two-tube phase difference,
It also increases signal enhancing linearly, while reducing the influence of extraneous vibration interference；Since its fluid flow pipe is series pipe,
An as root canal road, therefore sensor module provided by the invention is a kind of double-tube type instrument of not flow dividing structure, is answered extensively
For requiring to have in the technical field of flow dividing structure to coriolis flowmeter, such as hygiene-type Coriolis mass and flow
Meter；And due to not having flow dividing structure, not only it is easier to implement welding, but also welds operation required for can reducing；This hair
Bright sensor module, also by the way that weight gain structure is arranged on the non-vibration pipeline of fluid flow pipe, by non-vibration pipeline
Upper setting increases weight structure to adjust the center of gravity of sensor module, improves vibrational state, reduces non-vibration pipeline and vibrating tube
The vibration coupling on road；And the structure that increases weight and its non-vibration pipeline are not contacted with the shell of coriolis mass flowmeters, this
It is that the present invention and the core of the sensor module of coriolis mass flowmeters disclosed in CN1116588C patent document are distinguished,
In coriolis mass flowmeters sensor module disclosed in CN1116588C patent document, since it is fixedly connected with part and shell
Body pedestal is directly welded together, although its housing base and case lid and fixed connecting part are using sizable
Quality, but this can only reduce distortion caused by welding and cannot completely eliminate and limited to Separation by vibration effect, and this
The sensor module of invention, the structure that increases weight and non-vibration pipeline are not contacted with flowmeter shell, so that the non-vibration of sensor module
Non-rigid connection between dynamic part and flowmeter shell, this is conducive to improve vibration isolation effect, is conducive to flowmeter and obtains surely
Fixed zero point and excellent metering performance.
5, sensor module provided by the invention, weight gain structure is the clump weight being fixedly mounted on non-vibration pipeline,
Structure is simple, is easily worked production, and it is a little that the production cost increases while obtaining balanced null point and excellent metering performance, has
Conducive to marketing and volume production.
6, sensor module provided by the invention, by setting same material for clump weight and fluid flow pipe, and
By being welded to connect, good welding and physical property are obtained, is conducive to improve the stability of sensor module and Targets
Energy.
7, sensor module provided by the invention, clump weight and fluid flow pipe can also use heterogeneous material, and adopt
It is mechanically fixed connection, mechanical means multiplicity, fixation is more flexible, and it is dirty to reduce environment caused by welding
Dye and human injury.
8, sensor module provided by the invention passes through the root by clump weight far from vibration pipeline on non-vibration pipeline
The root of the junction of pipeline and non-vibration pipeline (vibrate) setting, clump weight distance vibration pipeline is remoter, vibration pipeline with
The vibration isolating effect of non-vibration pipeline is better, is arranged by this kind, can adopt in the case where guaranteeing the certain metering performance of sensor module
With the clump weight of small quality, material has been saved, has been reduced costs.
9, sensor module provided by the invention, by fluid input lines its fluid input and the first connecting pin it
Between be equipped with it is basic be in serpentine rectification pipeline, the fluid entered before vibrating pipeline is rectified, so that into vibrating tube
The velocity field on road substantially without non-central offset the problem of.In addition, serpentine rectification pipeline of the invention not only realize into
The effect that fluid before entering to vibrate pipeline is rectified, and be 90 degree since serpentine rectification pipeline includes two radians
Corner bevelling arc so that the fluid input of fluid input lines fluid flow direction with vibrate pipeline in fluid flow direction it is vertical, it is described
Fluid input is horizontally oriented, and vibration pipeline is in vertical direction, this is also the fluid stream of coriolis mass flowmeters
The basic demand of dynamic pipe.
10, sensor module provided by the invention, since it is an integral molding structure, compared to flow dividing structure
Double loop pipeline, be not only easier to implement welding, but also welding operation required for can reducing, caused by reducing welding
The distortion of fluid flow pipe.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is the contour structures view of coriolis mass flowmeters of the invention；
Fig. 2 is the shell structure view for being prescinded the coriolis mass flowmeters of a part；
Fig. 3 is the topology view according to the coriolis mass flowmeters of the invention of shell structure in Fig. 2；
Fig. 4 is the topology view of the fluid flow pipe of coriolis mass flowmeters of the invention；
Fig. 5 is the topology view of the coriolis mass flowmeters of another embodiment of the present invention；
Fig. 6 is the topology view of the fluid flow pipe of the coriolis mass flowmeters of another embodiment of the present invention；
Fig. 7 is the outstanding structural schematic diagram dragged of coriolis mass flowmeters of the invention.
Appended drawing reference:
1- upstream line connector；2- downstream line connector；3- shell；31- upstream joints opening；32- downstream tap opening；
4- fluid flow pipe；41- fluid input lines；411- level inputs pipeline section；The first curved arc of 412-；The second curved arc of 413-；414-
Turn to curved arc；42- fluid outlet line；421- horizontal output pipeline section；47- vibrates pipeline；48- non-vibration pipeline；5- first every
Shake part；The second vibration piece of 6-；7- weight gain structure；71- is outstanding to be dragged；711- first through hole；The second through-hole of 712-；713- third through-hole；
714- fourth hole；715- fifth hole；The 6th through-hole of 716-；72- clump weight.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
As shown in Figs 1-4, a kind of coriolis mass flowmeters are present embodiments provided comprising upstream line connector 1,
Downstream line connector 2, shell 3, fluid flow pipe 4, exciting bank, detection device, vibration insulation structure and weight gain structure 7.Wherein,
The fluid flow pipe 4 is installed in the shell 3, and isolation mounting is installed in fluid flow pipe 4 to divide fluid flow pipe 4
It is divided into vibration pipeline 47 and non-vibration pipeline 48, is also equipped with exciting bank and detection device, exciting bank in fluid flow pipe 4
For driving vibration pipeline 47 to vibrate, in fluent material ingress pipe, it is allowed to the flow forward in managing, then vibrating tube is by forced stream
Body vibration in conjunction, fluid, can be vertical with its flow direction to vibration pipeline 47 1 in order to revolt this forced vibration
Reaction force, fluid inlet section pipe and fluid outlet section pipe can be variant in the time order and function of vibration, and it is poor that this is called phase time,
Detection device is then used to detect that the phase time to be poor, so that it is determined that flowing through the mass flow of fluid flow pipe 4.The shell 3
Two sides form be adapted to the upstream line connector outer contour shape upstream joints opening 31, and with the downstream line
Connector outer profile adaptation downstream tap opening 32, the upstream line connector 1, downstream line connector 2 respectively with the shell 3
Upper corresponding upstream joints opening 31, downstream tap opening 32 are welded to connect.In the present embodiment, exciting bank is arranged described
Vibrating tube road, for driving the vibration pipeline vibration；Detection device is arranged on the vibrating tube road, described for detecting
Vibrate the relative velocity of pipeline；Weight gain structure is set on the non-vibration pipeline；The exciting bank, the vibration pipeline and institute
It states detection device and constitutes the oscillating component；The weight gain structure, the non-vibration pipeline constitute the non-vibration part.Specifically
, the exciting bank includes the driving coil that the intermediate position of two loops of the vibration pipeline is arranged in；The detection
Device include be arranged in it is described vibration pipeline two loops top section corresponding corner portion the first detection sensor and
Second detection sensor.
As shown in figure 4, the flowmeter has the upstream line connector for connecting upstream fluid pipeline in the present embodiment
With the downstream line connector for connecting downstream fluid pipeline, the axis of the upstream line connector and the downstream line connector
On same central axes, the sensor module is installed in the shell of the flowmeter comprising passes through vibration insulation structure point
The oscillating component made of and non-vibration part, the vibration insulation structure, which is included at least, is separated into vibrating tube for the fluid flow pipe
First vibration piece on road and non-vibration pipeline, first vibration piece are arranged close to the central axes.First vibration piece position
In the top of the central axes, the vertical range of first vibration piece and the central axes is 0-20mm.It is further preferred that
The vertical range of first vibration piece and the central axes is 0-10mm.As the preferred embodiment of the present invention, in the present embodiment
The first vibration piece be 5mm at a distance from central axes, but the present invention is not limited to 5mm, in other embodiments, can also be
0mm, 1mm, 3mm, 6mm, 10mm, 15mm or 20mm.It should be noted that during the first vibration piece of the invention may be located on
The top of axis, as shown in Figure 3.By the way that the first vibration piece to be arranged close to the central axes, so that the first vibration piece is to up and down
The distance for swimming the central axes of pipe joint is shorter, if oscillating component has vibration to leak out, then swashing what vibration isolation on piece was formed
Shake power to upstream and downstream link position axis distance it is also shorter, rotation will not be generated because of the bias of exciting force.
In the present embodiment, the center of gravity of the sensor module is generally on the central axes.By by sensor module
Center of gravity generally on the central axes so that when oscillating component vibration occurs and leaks, since the center of gravity of sensor module is most
Amount is close to or on the central axes of upstream and downstream pipe joint, so that the axis for reducing sensor around upstream and downstream link position returns
Turn radius.Therefore, no matter the oscillating component of sensor leaks because which kind of reason generates vibration, is all difficult to cause entire sensor
Non-vibration part vibrates, and improves the stability of flowmeter.
Further, the oscillating component and the non-vibration part are relative to horizontal line locating for first vibration piece
Moment difference be the oscillating component to the horizontal moment values 0-20%.It is arranged by this kind, so that if vibration section
When the raw vibration of distribution leaks, due to oscillating component the first vibration piece opposite with non-vibration part horizontal moment difference compared with
It is small, it can offset substantially, be conducive to the stability for improving flowmeter.
Preferably, the oscillating component and the non-vibration part are relative to horizontal locating for first vibration piece
Moment difference is 0.
The above are core of the invention technical solutions, in the following, by the Coriolis mass flow in conjunction with attached drawing to the present embodiment
Each section of meter describes in detail.
Firstly, the fluid flow pipe 4 to the present embodiment is introduced.
As shown in figure 3, the fluid flow pipe 4 of the present embodiment has for connecting with upstream line connector 1 to receive fluid
The fluid input lines 41 of material, for being connect with downstream line connector with export fluent material fluid outlet line 42 and
The dual loop piping being connected between the fluid input lines 41 and the fluid outlet line 42.The dual loop tube
The second loop that road includes the first loop connecting with the fluid input lines 41, is connect with the fluid outlet line 42,
And it is connected to the crossover line between the first loop and the second loop, first loop is parallel with second loop to be set
It sets, plane locating for specially described first loop is parallel with plane locating for second loop.
As can be seen from the above description, the fluid flow pipe 4 of the present embodiment is a kind of double-tube type fluid flow pipe 4, is integrated
Pipeline is formed, there is advantage identical with double-tube type fluid hose in the prior art, also, the fluid flow pipe 4 of the present embodiment
Since it is the dual loop piping being arranged in series, an as root canal by unique pipeline around to being formed by double loop, because
This its there is no flow dividing structure, can satisfy cannot have in the technical field of flow dividing structure coriolis mass flowmeters requirement,
Such as hygiene-type coriolis mass flowmeters.Since fluid flow pipe 4 does not have flow dividing structure, do not have to implement flow dividing structure
Welding operation, therefore compared with the prior art in flow dividing structure double-tube type fluid flow pipe 4, the fluid stream of the present embodiment
Dynamic pipe 4 is easier to implement welding, and can reduce required welding operation.
As shown in figure 4, the both ends of the fluid flow pipe 4 are separately connected upstream line connector 1 and downstream line connector 2,
It successively includes fluid input lines 41, concatenated dual ring that its specific structure, which is from upstream line connector 1 to downstream line connector 2,
Road pipeline and fluid outlet line 42.One end of the fluid input lines 41 is fluid input, and the other end is the first company
Connect end；One end of the fluid outlet line 42 is fluid exit, and the other end is second connection end；The dual loop connection
Between first connecting pin and second connection end.
As shown in figure 4, in the present embodiment, being equipped with vibration insulation structure in the fluid flow pipe 4, passing through vibration insulation structure
It is separated into the vibration pipeline 47 being located on vibration insulation structure and the non-vibration pipeline 48 under vibration insulation structure.Due to fluid
Angled setting between input and output direction and vibration pipeline 47, therefore fluid is entering the first loop before vibrating pipeline 47
One section of steering curved arc 414 is certainly existed on pipeline, and just because of the presence for turning to curved arc 414, so that fluid is by turning to
When curved arc 414, fluid inside slows down, and lateral fluid speedup, fluid flow rate center is moved outward, is similar to parabolical flow velocity
Distribution, fluid can be thrown to the outside of curved arc in turning because of centrifugal force.Therefore, the fluid of vibration pipeline 47, flow velocity are flowed into
Field distribution is eccentric parabola, leads to the change for vibrating 47 sensitivity of pipeline, influences the measurement performance for vibrating pipeline 47.
In order to solve defect existing for above-mentioned fluid flow pipe 4, as shown in figure 3, the stream of the fluid flow pipe 4 of the present embodiment
Body intake line 41 is equipped with the basic rectification pipeline in serpentine between its fluid input and the first connecting pin, and the serpentine is whole
Flow tube curb fluid flow direction include bending towards opposite the first curved arc 412 and the second curved arc 413, first curved arc 412
It is arranged close to the fluid input, second curved arc 413 is arranged close to first connecting pin.Second curved arc 413
Bend towards with it is described to turn to bending towards for curved arc 414 identical, the second curved arc 413 and to turn to curved arc 414 be to right bended arc described the
One curved arc 412 is curved arc to the left.Bias on the right side of curved arc can occur for fluid fluid flow fields when by the first curved arc 412, so
It is rectified afterwards by the second curved arc 413 and steering curved arc 414, so that fluid flow fields are entering vibration pipeline by three curved arcs
In the case where being substantially at non-central offset when 47, the uniformity of fluid flow fields is improved.The present embodiment passes through defeated in fluid
Enter on pipeline 41 be arranged serpentine rectify pipeline realize to enter vibration pipeline 47 fluid rectify so that enter vibration
More evenly, this is conducive to the measurement performance for improving vibration pipeline 47 to velocity field in pipeline 47.
Preferably, first curved arc 412, the second curved arc 413 and steering curved arc 414 are the corner bevelling that radian is 90 degree
Arc.In the present embodiment, the bent arc radius of second curved arc 413 is equal with the steering bent arc radius of curved arc 414, described
The bent arc radius of first curved arc 412 is equal to the half of 413 radius of the second curved arc.This kind of pipeline uniqueness around to not
Only realize the effect rectified to the fluid entered before vibrating pipeline 47, and the first curved arc 412, the second curved arc 413
And turn to curved arc 414 carried out respectively 90 degree steering so that the fluid input of fluid input lines 41 fluid flow direction and
Vibrating fluid flow direction in pipeline 47, vertically, the fluid input is horizontally oriented, and vibration pipeline 47 is in vertical direction, this
It is also the basic demand of the fluid flow pipe 4 of coriolis mass flowmeters.As the preferred embodiment of the present invention, the present embodiment
The first curved arc 412 and the second curved arc 413 of fluid input lines 41 are two and continuously bend towards opposite curved arc, and the second curved arc
413 with curved arc 414 is turned to be also to be directly connected to.That is, the present embodiment is entirely to realize rectification by curved arc structure
Effect.As the preferred embodiment of the present invention, the fluid outlet line 42 and the fluid input lines 41 are in the horizontal direction
Upper mirror settings, i.e., also be provided with a serpentine pipeline on the described fluid outlet line 42, this kind is arranged so that fluid flow pipe 4
It is a symmetrical structure in the horizontal direction in the shell 3 of coriolis mass flowmeters.
The embodiment of the present invention fluid input lines 41 further include the horizontal input pipeline section connecting with upstream fluid pipeline
411, fluid outlet line 42 further includes the horizontal output pipeline section 421 connecting with downstream fluid pipeline, the horizontal input pipeline section
411 are located on same axis with the horizontal output pipeline section 421.But the present invention is not limited to be located on same axis, at other
In embodiment, the horizontal input pipeline section 411 can also be in same level but not same with horizontal output pipeline section 421
On one axis.
In the present embodiment, one of the material selection stainless steel, Hastelloy, titanium alloy of the fluid flow pipe 4.
As a kind of mode of texturing of rectifying tube of the present invention, the fluid input lines 41 include being arranged in the first curved arc
412 and second the straight line pipeline between curved arc 413 and the second curved arc 413 and turn to the straight line pipeline between curved arc 414, and two
A straight line pipeline can also play the role of rectifying fluid, i.e. uniform flow field；In view of two straight line pipelines
Rectified action is also played, in order to guarantee that the fluid flow rate for entering vibration pipeline 47 is uniform, the curved arc half of first curved arc 412
Diameter is less than the half of the bent arc radius of second curved arc 413, the bent arc radius of second curved arc 413 and the steering
The bent arc radius of curved arc 414 is equal.
It should be noted that one of them can also be only arranged in above-mentioned two straight line pipeline, when only one straight line pipeline
When, need the bent arc radius to the first curved arc 412 to be adjusted, but the bent arc radius of the first curved arc 412 is still less than
The half of two curved arcs, 413 radius.
As a kind of mode of texturing of rectifying tube of the present invention, first curved arc 412, the second curved arc 413 and steering are curved
Arc 414 can also be the changed non-circular curved arc of curvature, and the difficulty of processing of fluid flow pipe 4 can increase in the case of this kind,
But it can still play the role of rectifying the fluid for entering vibration pipeline 47.
Then, the weight gain structure 7 of the present embodiment is introduced.
As shown in figure 4, the weight gain structure 7 of the present embodiment is fixedly mounted at the clump weight on the non-vibration pipeline 48,
One of the material selection stainless steel of the clump weight, Hastelloy, titanium alloy, spheroidal graphite cast-iron.Preferably, the clump weight
It is identical as the material of the fluid flow pipe 4, it is realized and is fixed by welding manner.The welding manner can be soldering or argon
One of arc-welding.
In the present embodiment, specifically, the clump weight be that level is erected on non-vibration pipeline 48 it is outstanding drag 71, and
It is described it is outstanding drag 71 to be symmetrical set in the horizontal direction of the non-vibration pipeline 48, specifically, by this present embodiment
Fluid flow pipe 4 is dual loop piping, therefore described outstanding drags the non-of 71 left end and the first loop of left end and the second loop
Vibration pipeline 48 is fixedly connected, and described hang drags the non-vibration pipeline 48 of 71 right end and the first loop of right end and the second loop solid
Fixed connection.By the setting of clump weight, the weight of the non-vibration part of sensor module is increased, this is conducive to sensor module
Oscillating component and non-vibration part be isolated, be conducive to the metering performance for improving sensor module, obtain balanced null point.And
Counterweight block structure is simple, handling ease, at low cost, that is to say, that the present embodiment is realized by adding clump weight both Targets
Can greatly improve, and increased cost also very little is conducive to marketing and volume production.
In the present embodiment, described outstanding to drag 71 for certain thickness rectangular block, the minimum length and width ruler of the rectangular block
The very little length and width dimensions in space formed with 48 outer edge of non-vibration pipeline are consistent.That is, the minimum of the rectangular block
Length dimension can not be less than the spacing of the outermost end of left and right sides non-vibration pipeline 48, the minimum width dimension of the rectangular block
The spacing of the outermost end of former and later two non-vibration pipelines 48 positioned at the same side can not be less than.Work as coriolis mass flowmeters
Use temperature it is higher when, if it is outstanding drag 71 and fluid flow pipe 4 thermal capacitance it is inconsistent, 71 and fluid flow pipe can be dragged outstanding
Stress is directly deformed between 4, to influence performance；And the present embodiment is by above-mentioned setting so that it is outstanding drag 71 thermal capacitance with
The thermal capacitance of fluid flow pipe 4 is almost the same, to guarantee performance.
As the preferred embodiment of the present invention, the outer tube diameter of the thickness of the rectangular block and the single non-vibration pipeline 48
It is equal.But the present invention is not limited to equal, in other embodiments, the thickness of the rectangular block can also be single non-vibration pipe
0.5 times, 0.8 times, 1.2 times or 1.5 times of the outer tube diameter on road 48.
In the present embodiment, described hang drags 71 root far from the vibration pipeline 47 on the non-vibration pipeline 48 to set
Set, analyzed by theory of vibration isolation, in the case where reaching identical metering performance, it is described it is outstanding drag 71 on non-vibration pipeline 48 distance
The root position of the vibration pipeline 47 is remoter, and the outstanding quality for dragging 71 of use is smaller, also more material saving.Specifically, in this reality
It applies in example, it is described outstanding to drag 71 on the non-vibration pipeline 48 to account for the non-vibration pipeline 48 at a distance from vibration 47 root of pipeline perpendicular
The 50% of straight development length.But the present invention is not limited to 50%, in other embodiments, described outstanding to drag 71 in the non-vibration pipeline
The 30% or 40% or 45% of the vertical development length of non-vibration pipeline 48 is accounted at a distance from vibration 47 root of pipeline on 48.
As shown in fig. 7, described hang drags 71 to be symmetrical arranged in the horizontal direction relative to the fluid flow pipe 4.According to stream
Flow direction of the body material in the fluid flow pipe 4, described hang drag 71 to be equipped with the first through hole worn for first loop
711, the second through-hole 712 and third through-hole 713, and equipped with fourth hole 714, the fifth hole worn for second loop
715 and the 6th through-hole 716, wherein the second through-hole 712 and third through-hole 713 setting of first loop outstanding drag 71 described
It the left and right sides of back edge and is symmetrical arranged, the fourth hole 714 and fifth hole 715 of second loop are arranged described
It the outstanding left and right sides for dragging 71 front edges and is symmetrical arranged, the 6th of the first through hole 711 of first loop and the second loop the
Through-hole 716 is between other through-holes and is symmetrical set.Sensor module is symmetrical structure, help to obtain better meter
Measure performance.
The present embodiment adjusts the center of gravity of sensor module by the way that weight gain structure 7 is arranged on non-vibration pipeline, improves
Vibrational state reduces non-vibration pipeline and vibrates the vibration coupling of pipeline；And the structure that increases weight 7 and its non-vibration pipeline 48 with
The shell of coriolis mass flowmeters does not contact, so that non-rigid between the non-vibration part of sensor module and flowmeter shell
Property connection, this be conducive to improve vibration isolation effect, be conducive to flowmeter and obtain stable zero point and excellent metering performance.
In the present embodiment, the fluid input lines 41 and fluid outlet line 42 of the fluid flow pipe 4 are respectively welded
The fixation of fluid flow pipe is realized in upstream line connector and downstream line connector.
A kind of mode of texturing of weight gain structure 7 as the present embodiment, as shown in figure 5, the clump weight can also be point
Body structure is equipped with one piece of sub- clump weight 72 on the non-vibration pipeline 48 of the left and right sides, which is fixedly mounted
It is symmetrical arranged on being located at two ipsilateral non-vibration pipelines 48, and relative to two non-vibration pipelines 48；Positioned at not ipsilateral
Two sub- clump weights 72 in 48 horizontal direction of non-vibration pipeline be symmetrical arranged.
As a kind of mode of texturing of the present embodiment weight gain structure 7, as shown in fig. 6, the weight gain structure 7 can also pass through
The mode of non-clump weight realizes weight gain, for example, the weight gain structure 7 be non-vibration pipeline 48 towards with vibration 47 phase negative side of pipeline
To the extension pipeline of extension.The work of the non-vibration part weight gain of sensor module is also able to achieve by the extension of non-vibration pipeline 48
With.
The vibration insulation structure of the present embodiment is introduced.
As shown in figures 3 to 6, the vibration insulation structure includes being welded in the fluid flow pipe 4 to flow the fluid
Pipe 4 is divided into the first vibration piece 5 of vibration pipeline 47 and non-vibration pipeline 48 and positioned at the second of 5 lower section of the first vibration piece
Vibration piece 6, first vibration piece 5 and the second vibration piece 6 are the piece equipped with the through-hole passed through for 4 tunnel of fluid flow pipe
Shape structure, first vibration piece 5 and the second vibration piece 6 are welded to connect by the through-hole and the fluid flow pipe 4.
It should be noted that the first vibration isolation piece, the second vibration isolation piece are not limited to weld with the mode that is fixedly connected of fluid flow pipe 4
It connects, can also be fixed using mechanical connection manner.
The quantity of the vibration piece is also not necessarily limited to two, in other embodiments, can also be in the lower section of the second vibration piece 6
Third vibration piece or even the 4th vibration piece are set.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations can be made in the case where bright spirit and scope, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (18)
1. a kind of coriolis mass flowmeters sensor module, which is characterized in that the flowmeter has for connecting
Swim the upstream line connector of fluid line and the downstream line connector for connecting downstream fluid pipeline, the upstream line connector
It is located on same central axes with the axis of the downstream line connector, the sensor module is installed on the shell of the flowmeter
It is interior comprising the oscillating component being separated by vibration insulation structure and non-vibration part, the vibration insulation structure are included at least institute
The first vibration piece that fluid flow pipe is separated into vibration pipeline and non-vibration pipeline is stated, first vibration piece is close to the axis
Line setting.
2. coriolis mass flowmeters sensor module according to claim 1, which is characterized in that described first every
Vibration part is located above or below the central axes, and the vertical range of first vibration piece and the central axes is 0-20mm.
3. coriolis mass flowmeters sensor module according to claim 2, which is characterized in that described first every
The vertical range of vibration part and the central axes is 0-10mm.
4. sensor module according to claim 1, which is characterized in that the oscillating component and non-vibration part phase
Moment difference for the central axes is 0-20% of the oscillating component to the central axes moment values.
5. sensor module according to claim 4, which is characterized in that the oscillating component and non-vibration part phase
It is 0 for horizontal moment difference locating for first vibration piece.
6. sensor module according to any one of claims 1-5, which is characterized in that including
Fluid flow pipe has fluid input lines and fluid outlet line and is connected on the fluid input lines and fluid
Dual loop piping between output pipe；The dual loop piping is divided into vibration pipeline and non-by the vibration insulation structure
Vibrate pipeline；
Exciting bank is arranged on the vibrating tube road, for driving the vibration pipeline vibration；
Detection device is arranged on the vibrating tube road, for detecting the relative velocity of the vibration pipeline；
Increase weight structure, is arranged on the non-vibration pipeline；
The exciting bank, the vibration pipeline and the detection device constitute the oscillating component；It is the weight gain structure, described
Non-vibration pipeline constitutes the non-vibration part.
7. sensor module according to claim 6, which is characterized in that the dual loop piping includes and the fluid
First loop of intake line connection, the second loop for being connect with the fluid output tube, plane locating for first loop
Parallel with plane locating for the second loop, first loop is connect with second loop by crossover line.
8. sensor module according to claim 6, which is characterized in that the exciting bank includes being arranged in the vibration
The driving coil at the intermediate position of two loops of pipeline；And/or the detection device includes that the vibration pipeline is arranged in
The first detection sensor and the second detection sensor of the corresponding corner portion of the top section of two loops.
9. sensor module a method according to any one of claims 6-8, which is characterized in that the weight gain structure is fixed peace
Clump weight on the non-vibration pipeline.
10. sensor module according to claim 9, which is characterized in that the material of the fluid flow pipe be stainless steel,
One of Hastelloy, titanium alloy；And/or the material of the clump weight is stainless steel, Hastelloy, titanium alloy, spheroidal graphite casting
One of iron.
11. sensor module according to claim 9, which is characterized in that the clump weight is on the non-vibration pipeline
The 30%-50% of the vertical development length of non-vibration pipeline is accounted at a distance from the vibration pipeline root.
12. sensor module according to claim 9, which is characterized in that the clump weight is erected at described non-for level
The outstanding support of vibrating tube road, and the outstanding support is symmetrical set in the horizontal direction of the non-vibration pipeline.
13. sensor module according to claim 12, which is characterized in that the outstanding support is with certain thickness rectangle
Block.
14. sensor module according to claim 13, which is characterized in that the minimum length and width dimensions of the rectangular block and institute
The bulk for stating the formation of non-vibration pipeline outer edge is consistent.
15. sensor module according to claim 13, which is characterized in that the rectangular block with a thickness of the non-vibration
0.5-1.5 times of the single conduit outer diameter of pipeline.
16. sensor module according to claim 15, which is characterized in that the rectangular block with a thickness of the non-vibration
1 times of the single conduit outer diameter of pipeline.
17. sensor module described in any one of 2-16 according to claim 1, which is characterized in that according to fluent material in institute
The flow direction in fluid flow pipe is stated, the outstanding support is equipped with first through hole, the second through-hole and the third worn for first loop
Through-hole, and equipped with fourth hole, fifth hole and the 6th through-hole worn for second loop, wherein first ring
Second through-hole and third through-hole on road are arranged in the left and right sides of the outstanding support back edge and are symmetrical arranged, second loop
Fourth hole and fifth hole be arranged in it is described it is outstanding support front edge the left and right sides and be symmetrical arranged, first loop
6th through-hole of first through hole and the second loop between other through-holes and is symmetrical set.
18. a kind of coriolis mass flowmeters, comprising:
Shell；
Sensor module is installed on the enclosure interior；
It is characterized in that, the sensor module is sensor module described in any one of claim 1-17.
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| CN201710748980.7A CN109425399B (en) | 2017-08-25 | 2017-08-25 | Coriolis mass flowmeter and sensor assembly therefor |
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| CN201710748980.7A CN109425399B (en) | 2017-08-25 | 2017-08-25 | Coriolis mass flowmeter and sensor assembly therefor |
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Cited By (1)
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| CN111771810A (en) * | 2020-07-14 | 2020-10-16 | 罗凡 | Impeller type aerator for increasing oxygen increasing amount |
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|---|---|
| CN109425399B (en) | 2024-02-20 |
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