CN104776891A - Mass flow rate sensor - Google Patents
Mass flow rate sensor Download PDFInfo
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- CN104776891A CN104776891A CN201510109216.6A CN201510109216A CN104776891A CN 104776891 A CN104776891 A CN 104776891A CN 201510109216 A CN201510109216 A CN 201510109216A CN 104776891 A CN104776891 A CN 104776891A
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- measuring tube
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—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
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- Measuring Volume Flow (AREA)
Abstract
The invention relates to a mass flow rate sensor. The mass flow rate sensor comprises a first measuring tube and a second measuring tube. The structures and sizes of the first measuring tube and the second measuring tube are the same, and the first measuring tube and the second measuring tube are parallelly arranged in a shell, wherein each measuring tube comprises an elbow section. According to the technical scheme, when the mass flow rate and density of a medium are measured, resistance to the medium is reduced; meanwhile, the sensor is high in working frequency and mechanical quality factors, good in stability, small in pressure loss, and strong in anti-shock resistance and capability of resisting disturbance.
Description
Technical field
The present invention relates to test and measuring field of instrumentation technology, in particular to a kind of mass flow sensor.
Background technology
Coriolis mass flowmeter (Coriolis Mass Flowmeter, be called for short CMF) be a kind of resonant transducer, the mass rate of the fluid flowing through pipeline is measured in the impact of the coriolis effect produced when utilizing fluid to flow through its vibrating conduit on pipe ends vibration phase or amplitude, can direct sensitive fluid mass rate, the density of fluid can be measured simultaneously.The advantage of high precision, high reliability and stability makes CMF receive increasing concern, is widely used in the fields such as oil, chemical industry, rock gas, environmental protection, medical and health, food, trade settlement.
Coriolis mass flowmeter, is divided into bent tube type and straight pipe type according to the shape of measuring tube.Disclose many kinds of bend pipe types in prior art, have U-shaped, Ω type, △ type, ring-like, C type, Type B, T-shaped, droplet-shaped etc.Its tube wall is thicker, and rigidity is little, less by corrosion impact, and resonance frequency is lower; The phase differential of reflection mass rate is Millisecond, and electronic signal more easily processes; But the easy trapped gas of bent tube type and fluid residue and cause error, and make processed complex.Volume, properity etc. due to traditional bent tube type CMF sensor are subject to the constraint of installation environment and measurement demand, seriously govern development, require that it is to future developments such as small size, low pressure loss, high precision, high sensitivity, good stabilities.
Straight pipe type CMF, resonance frequency is high, differs comparatively large, therefore be not subject to the interference of extraneous vibration with industrial common mechanical vibration frequency; Not easily stockpile gas and residue, physical dimension is less; For making resonance frequency be unlikely to too high, its tube wall designs thinner, thus wear-resisting and resistance to corrosion is poor.The phase differential of reflection quality is Microsecond grade, and the process of electric signal is more difficult, seriously limits the measurement range of CMF, and the sensitivity of the CMF of this tradition vibration straight pipe type is lower, and by temperature fluctuations affect.
Current developed CMF also exists some shortcomings: the combination property of CMF measuring tube design is poor, and Pipe installing is unstable, and the machinery realization of cast is more difficult; CMF vibration interference is to external world more responsive; CMF system can not be used for measuring low-density medium.
Common Coriolis mass sensor is when utilizing fluid to flow in vibrating tube, carries out measurement quality flow by producing the principle of Coriolis force that is directly proportional to mass rate.At present, generally adopt vibration tube-type coriolis mass flow sensor (as Fig. 1), primarily of sensing unit and secondary instrument composition, wherein sensing unit a comprises measuring tube a1, a2, driver a5 and vibro-pickup a3, a4; Secondary instrument b comprises Closed Loop Control Unit b1 and flow solving unit b2, is control and the signal processing system of sensing unit respectively.Sensing unit exports the vibration signal relevant to measured flux; Closed Loop Control Unit b1 provides accumulation signal to driver a5, makes measuring tube maintain resonant condition, and carries out real-time follow-up to the vibration frequency of measuring tube a1, a2; The output signal of flow solving unit b2 to vibro-pickup a3, a4 processes and exports metrical information, therefrom determines mass rate and the density of detected fluid.
But the sensor volume is comparatively large, from emptying, can not can produce larger resistance to the flowing of medium, and be difficult to ensure higher frequency of operation and mechanical quality factor, preferably stability, less crushing, stronger shock resistance and antijamming capability.
Summary of the invention
Technical matters to be solved by this invention is, how during in mass rate and the density of measuring media, reduce the resistance that it is caused, ensure that sensor has higher frequency of operation and mechanical quality factor, preferably stability, less crushing, stronger shock resistance and antijamming capability.
For this purpose, the present invention proposes a kind of mass flow sensor, comprising:
First measuring tube and the second measuring tube, described first measuring tube is identical with described second measuring tube structure, and size is equal, is set in parallel in shell, and wherein, every root measuring tube comprises bend loss;
Driver, is arranged on bottom described bend loss, for encouraging described first measuring tube and described second measuring tube;
First detecting device, is arranged on described bend loss first end, for detecting the first vibration signal of described first end;
Second detecting device, is arranged on described bend loss second end, for detecting the second vibration signal of described second end;
Processor, for calculating the mass rate of fluid in described first measuring tube and described second measuring tube according to described first vibration signal and described second vibration signal.
Preferably, each measuring tube also comprises:
First inclined tube section and the second inclined tube section, described bend loss is connected to described first inclined tube section and described second inclined tube section respectively, and described first inclined tube section and described second inclined tube section are with the plane symmetry of bend loss described in vertical and decile, the axis of described first inclined tube section and the axis of described bend loss tangent, the axis of described second inclined tube section and the axis of described bend loss tangent.
Preferably, also comprise:
First connector, is arranged at described enclosure, is connected with the first inclined tube section of described second measuring tube with described first measuring tube;
Second connector, is arranged at described enclosure, is connected with the second inclined tube section of described second measuring tube with described first measuring tube;
First shunt, is arranged at described housing exterior, is connected with described first connector;
Second shunt, is arranged at described housing exterior, is connected with described second connector;
First flange, is arranged at housing exterior, is connected to described first shunt;
Second flange, is arranged at housing exterior, is connected to described second shunt.
Preferably, also comprise:
First distance plate, is arranged in the first inclined tube section of described first measuring tube and described second measuring tube, near the side of described first connector;
Second distance plate, is arranged in the first inclined tube section of described first measuring tube and described second measuring tube;
3rd distance plate, is arranged in the second inclined tube section of described first measuring tube and described second measuring tube, near the side of described second connector;
4th distance plate, is arranged in the second inclined tube section of described first measuring tube and described second measuring tube.
Preferably, described first distance plate apart from described first connector 2 centimetres ~ 4 centimetres,
And/or described 3rd distance plate is apart from described second connector 2 centimetres ~ 4 centimetres,
And/or described second distance plate is apart from described first distance plate 2 centimetres,
And/or described 4th distance plate is apart from described 3rd distance plate 2 centimetres,
And/or the thickness of described second distance plate and described four distance plates is equal, the thickness of described first distance plate and described 3rd distance plate is equal, and the thickness of described second distance plate is 2 ~ 3 times of the thickness of described first distance plate,
And/or described first detecting device and described first connecting portion are at a distance of 2 centimetres ~ 4 centimetres,
And/or described second detecting device and described second connecting portion are at a distance of 2 centimetres ~ 4 centimetres.
Preferably, also comprise:
First reinforcing sleeve, is arranged at the first inclined tube section of described first measuring tube and the connecting portion of described first connector;
Second reinforcing sleeve, is arranged at the second inclined tube section of described first measuring tube and the connecting portion of described second connector;
3rd reinforcing sleeve, is arranged at the first inclined tube section of described second measuring tube and the connecting portion of described first connector;
4th reinforcing sleeve, is arranged at the second inclined tube section of described second measuring tube and the connecting portion of described second connector.
Preferably, described first connector is connected with described first reinforcing sleeve and described 3rd reinforcing sleeve by argon arc welding, described second connector is connected with described second reinforcing sleeve and described 4th reinforcing sleeve by argon arc welding, described first reinforcing sleeve, second reinforcing sleeve is respectively welded to described first measuring tube by soldering, described 3rd reinforcing sleeve, 4th reinforcing sleeve is respectively welded to described second measuring tube by soldering, described first connector and the second connector are respectively welded to described first shunt and described second shunt by argon arc welding, described first shunt and the second shunt are respectively welded to described shell by argon arc welding.
Preferably, also comprise:
Connecting pipe and adapting flange, described connecting pipe is for connecting described shell and described adapting flange, and described adapting flange is by rubber column and connect bolt seal.
Preferably, the axis of described bend loss is minor arc, and the radius of described minor arc is 35 centimetres ~ 55 centimetres.
Preferably, described first detecting device comprises the first coil and first magnet steel of coaxial setting;
Described second detecting device comprises the second coil and second magnet steel of coaxial setting;
Described driver comprises tertiary coil and the 3rd magnet steel of coaxial setting,
Wherein, described first coil and described second coil and described 3rd magnet steel are crisscross arranged in described first measuring tube, and described first magnet steel and described second magnet steel and described tertiary coil are crisscross arranged in described second measuring tube.
Pass through technique scheme, when mass rate and the density of measuring media, the resistance that it is caused can be reduced, ensure that sensor has higher frequency of operation and mechanical quality factor, preferably stability, less crushing, stronger shock resistance and antijamming capability.
Accompanying drawing explanation
Can understanding the features and advantages of the present invention clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the present invention, in the accompanying drawings:
Fig. 1 shows the structural representation of mass flow sensor in prior art;
Fig. 2 shows the structural representation of mass flow sensor according to an embodiment of the invention;
Fig. 3 shows the structural representation of the mass flow sensor according to another embodiment of the present invention;
Fig. 4 shows the front elevation of mass flow sensor according to an embodiment of the invention;
Fig. 5 shows the vertical view of mass flow sensor according to an embodiment of the invention;
Fig. 6 shows the structural representation of measuring tube in mass flow sensor according to an embodiment of the invention;
Fig. 7 shows the schematic diagram of detecting device and driver in mass flow sensor according to an embodiment of the invention;
Fig. 8 shows the schematic diagram of distance plate in mass flow sensor according to an embodiment of the invention;
Fig. 9 show according to an embodiment of the invention in mass flow sensor distance plate and measuring tube relation schematic diagram is installed.
Drawing reference numeral illustrates:
1-first measuring tube; 2-second measuring tube; 3-driver; 4-first detecting device; 5-second detecting device; 6-first distance plate; 7-second distance plate; 8-the 3rd distance plate; 9-the 4th distance plate; 10-first connector; 11-second connector; 12-first shunt; 13-second shunt; 14-first reinforcing sleeve; 15-second reinforcing sleeve; 16-the 3rd reinforcing sleeve; 17-the 4th reinforcing sleeve; 18-first flange; 19-second flange; 20-connecting pipe; 21-adapting flange; 22-shell; 23-bend loss; 24-first inclined tube section; 25-second inclined tube section.
Embodiment
Can more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
As shown in Figure 2, mass flow sensor according to an embodiment of the invention, comprising:
First measuring tube 1 is identical with the second measuring tube 2 structure with the second measuring tube 2, first measuring tube 1, and size is equal, is set in parallel in shell, and wherein, every root measuring tube comprises bend loss 23;
Driver 3, is arranged on bottom bend loss 23, for encouraging the first measuring tube 1 and the second measuring tube 2;
First detecting device 4, is arranged on the first end of bend loss 23, for detecting the first vibration signal of first end;
Second detecting device 5, is arranged on the first end of bend loss 23, for detecting the second vibration signal of the second end;
Processor (not shown, can be connected to the first detecting device 4 and the second detecting device 5), for calculating the mass rate of fluid in the first measuring tube 1 and the second measuring tube 2 according to the first vibration signal and the second vibration signal.
First the principle of mass flow sensor is briefly described, when flowing through fluid in pipe, the single order that the effect of coriolis effect makes bend pipe produce about central symmetry axis reverses " secondary undulation ", is somebody's turn to do " secondary undulation " direct " mass rate (kg/s) " with flowing through proportional.Detect that the mistiming (or phase differential) of vibration signal can calculate the mass rate of fluid by the first detecting device 4 and the second detecting device 5.Corresponding relation is:
Q
m＝K
1Δt
12
In formula:
Q
mfor detected fluid mass rate, unit is kg/s;
K
1for the coefficient that the shape, size, material etc. with measuring tube is relevant, demarcated by reality and determine, unit is kg/s
2;
Δ t
12be the mistiming that the first detecting device 4 and the second detecting device 5 detect vibration signal, unit is s;
In addition, when being full of detected fluid in measuring tube, its equivalent mass changes, and resonance frequency also can offset, and this frequency shift (FS) can reflect fluid density.
Corresponding relation is as follows:
In formula:
ρ
mfor detected fluid density, unit is kg/m
3;
K
2for the coefficient relevant with the shape of measuring tube, size, material and additional mass etc., determined by actual calibration experiment, unit is kg/m
3;
F
0for resonance frequency during measuring tube blank pipe, unit is Hz;
F
mfor resonance frequency when measuring tube is full of detected fluid, unit is Hz.
According to Coriolis effect, dual distance plate is adopted to fix welding in the both sides of the first measuring tube 1 and the second measuring tube 2, and two measuring tubes are welded on the first connector 10 and the second connector 11 abreast, securely, form a tuning fork, to eliminate the impact of extraneous vibration.
Two measuring tubes are under the electric magnetization effect of the generation of driver 3, and respectively with natural frequency vibration, vibration phase is contrary.Due to the yo-yo effect of measuring tube, obtain a Coriolis acceleration at each fluid micellar of Bottomhole pressure, measuring tube is subject to the contrary distribution coriolis force in acceleration direction therewith.Contrary into and out of the coriolis force direction suffered by both sides due to measuring tube, and measuring tube is twisted, its torsion degree is directly proportional with the interior instantaneous mass flow of pipe.The influent stream side being arranged in measuring tube often vibrates the process of a week with the first detecting device 4 going out to flow side and the second detecting device 5 at tuning fork, detect two-way vibration signal, the phase differential of two paths of signals and the degree of rocking of detector tube, namely instantaneous delivery is directly proportional.Calculate the phase differential between signal by processor, can mass rate be calculated.Meanwhile, because measuring tube is filled with fluid, resonance frequency is changed, the change of resonance frequency then reflects the real-time density information of fluid.
In the present embodiment, medium in measuring tube only need flow in bend loss 23, namely only need through a kink in flow process, and bend loss 23 transition is round and smooth, the resistance that medium is subject in bend loss 23 is less, reduce flow field effect, reduce medium to the impact of inner-walls of duct and corrosion simultaneously, improve the serviceable life of pipeline.
As shown in Figures 3 to 5, preferably, each measuring tube also comprises: the first inclined tube section 24 and the second inclined tube section 25, bend loss 23 is connected to the first inclined tube section 24 and the second inclined tube section 25 respectively, and the first inclined tube section 24 and the second inclined tube section 25 are with plane symmetry that is vertical and decile bend loss 23, the axis of the first inclined tube section 24 and the axis of bend loss 23 tangent, the axis of the second inclined tube section 25 and the axis of bend loss 23 tangent.
As shown in Figure 6, in the present embodiment, every root measuring tube comprises the first inclined tube section 24, second inclined tube section 25 and bend loss 23 3 part, and concrete tubing can adopt 316L stainless steel, titanium, Hastelloy, also can select the tubing of other material as required.Measuring tube can be integrally formed by bending technique, also can be to be assembled by bend loss and inclined tube section.
Due to the axis of the first inclined tube section 24 and the axis of bend loss 23 tangent, and the axis of the second inclined tube section 25 and the axis of bend loss 23 tangent, make the connecting portion transition of the first inclined tube section 24 and the second inclined tube section 25 and bend loss 23 round and smooth, thus the medium of inflow measuring tube is when flowing through the connecting portion of the first inclined tube section 24 and the second inclined tube section 25 and bend loss 23, the resistance be subject to is very little, reduces flow.
By arranging inclined tube in bend loss 23 both sides, the assembling of measuring tube is more prone to, when assembling, radian relative to when bend loss 23 is directly connected with connector and the cooperation place of connector, measuring tube in the present embodiment and the cooperation place of connector are straight lines, more easily ensure precision and the consistance of equipment during assembling.
And after bend loss 23 both sides arrange inclined tube, the distance that medium is flowed through in measuring tube is longer, under the prerequisite not changing the diameter of measuring tube, wall thickness, when identical end face of flange length, coriolis effect is more remarkable, can improve sensitivity and range ratio after namely arranging inclined tube section.
When the non-flows through sensor of fluid, vibrator 3 encourages two measuring tubes with its natural frequency vibration, and now, measuring tube entrance side is identical with the sinusoidal signal frequency that the second detecting device 5 detects and phase place with the first detecting device 4 of outlet side, without phase differential.Measuring tube is now blank pipe, and the resonance frequency of measuring tube is density benchmark frequency, and namely without frequency during fluid, the real-time density recorded and liquid mass flow numerical value are zero.
When fluid flows through sensor, first, the flowing of measuring tube inner fluid causes coriolis effect, measuring tube two ends are subject to the contrary distribution coriolis force in equal and opposite in direction direction, show as between sinusoidal signal that two detecting devices detect and there is phase differential, the mass rate of this phase differential and fluid is proportional, can obtain the real-time quality flow of fluid by detecting this phase differential.Meanwhile, owing to being full of fluid in measuring tube, equivalent mass changes, therefore resonance frequency offsets, and this side-play amount indicates the real-time density of fluid.
Usually, also comprise:
First connector 10, is arranged at enclosure, is connected with the first inclined tube section 24 of the second measuring tube 2 with the first measuring tube 1;
Second connector 11, is arranged at enclosure, is connected with the second inclined tube section 25 of the second measuring tube 2 with the first measuring tube 1;
First shunt 12, is arranged at housing exterior, is connected with the first connector 10;
Second shunt 13, is arranged at housing exterior, is connected with the second connector 11;
First flange 18, is arranged at housing exterior, is connected to the first shunt 11;
Second flange 19, is arranged at housing exterior, is connected to the second shunt 12.
Connector and shunt can be weld together after casting respectively again, also can be cast formation entirety together.
The steadiness that measuring tube and shunt can improve measuring tube and shunt junction is connected respectively by the first connector 10 and the second connector 11, and connector has better isolating affection, therefore can isolating exterior disturbance impact that measuring tube is caused better.
As shown in Figure 8 and Figure 9, usually, also comprise:
First distance plate 6, is arranged in the first inclined tube section 24 of the first measuring tube 1 and the second measuring tube 2, near the side of the first connector 10;
Second distance plate 7, is arranged in the first inclined tube section 24 of the first measuring tube 1 and the second measuring tube 2;
3rd distance plate 16, is arranged in the second inclined tube section 25 of the first measuring tube 1 and the second measuring tube 2, near the side of the second connector 11;
4th distance plate 9, is arranged in the second inclined tube section 25 of the first measuring tube 1 and the second measuring tube 2.
Dual spacing pattern can be realized respectively by two groups of distance plates, such that the frequency of operation of measuring tube is higher, stability is better, shock resistance and antijamming capability stronger.
Four distance plates can fix two measuring tubes by the mode of vacuum brazing simultaneously, measuring tube is not easily deformed, and make the characteristic of two measuring tubes as far as possible identical, limited torsion needed for flow measurement is provided simultaneously and bends, by changing the resonance frequency that can change sensor of dual distance plate in inclined tube fragment position, therefore can determine according to designed frequency that dual distance plate is in the position of inclined tube section, to reduce the vibration coupling of internal measurement pipe, and strengthen the shock resistance of measuring tube.
Usually, the first distance plate 6 and the first connector 10 apart 2 centimetres ~ 4 centimetres,
And/or the 3rd distance plate 8 and the second connector 11 at a distance of 2 centimetres ~ 4 centimetres,
And/or second distance plate 7 and the first distance plate 6 at a distance of 2 centimetres,
And/or the 4th distance plate 8 and the 3rd distance plate 8 at a distance of 2 centimetres,
And/or second the thickness of distance plate 7 and four distance plates 9 equal, the thickness of the first distance plate 6 and the 3rd distance plate 8 is equal, the thickness of the second distance plate 7 is 2 ~ 3 times of the thickness of the first distance plate 6, due to stronger the closer to the vibration of bent portion 23 measuring tube, and the second distance plate 7 and the 4th distance plate 9 relative to the first distance plate 6 and the 3rd distance plate 8 closer to bent portion 23, what the second distance plate 7 and the 4th distance plate 9 are arranged is thicker, can improve the resistance to overturning of the dual spacing of spacing.
And/or first detecting device 4 and the first connecting portion at a distance of 2 centimetres ~ 4 centimetres,
And/or second detecting device 5 and the second connecting portion at a distance of 2 centimetres ~ 4 centimetres.
Usually, also comprise:
First reinforcing sleeve 14, is arranged at the first inclined tube section 24 of the first measuring tube 1 and the connecting portion of the first connector 10;
Second reinforcing sleeve 15, is arranged at the second inclined tube section 25 of the first measuring tube 1 and the connecting portion of the second connector 11;
3rd reinforcing sleeve 16, is arranged at the first inclined tube section 24 of the second measuring tube 1 and the connecting portion of the first connector 10;
4th reinforcing sleeve 17, is arranged at the second inclined tube section 25 of the second measuring tube 1 and the connecting portion of the second connector 11.
Usually, first connector 10 is connected with the first reinforcing sleeve 14 and the 3rd reinforcing sleeve 16 by argon arc welding, second connector 11 is connected with the second reinforcing sleeve 15 and the 4th reinforcing sleeve 17 by argon arc welding, first reinforcing sleeve 14, second reinforcing sleeve 15 is respectively welded to the first measuring tube 1 by soldering, 3rd reinforcing sleeve 16, 4th reinforcing sleeve 17 is respectively welded to the second measuring tube 2 by soldering, first connector 10 and the second connector 11 are respectively welded to the first shunt 12 and the second shunt 13 by argon arc welding, first shunt 12 and the second shunt 13 are respectively welded to shell by argon arc welding.
Usually, also comprise:
Connecting pipe 20 and adapting flange 21, connecting pipe 20 is for connected with outer casing and adapting flange 21, and adapting flange 21 is by rubber column and connect bolt seal.
Seal by rubber column and the mode connecting bolt compresses the method that connects to connect, can sealing effectiveness be improved, and the comfort level of installing.
Usually, the axis of bend loss 23 is minor arc, and the radius of minor arc is 35 centimetres ~ 55 centimetres.Axis due to bend loss 23 is minor arc, less relative to the shared space of major arc (and semi arch), and medium can guide to wherein by the first coupled inclined tube section 24 and the second inclined tube section 25 easily, and radian corresponding to minor arc is less, so degree of curving is also less, therefore can reduces medium and to flow wherein suffered resistance.
As shown in Figure 7, usually, the first detecting device 4 comprises the first coil and first magnet steel of coaxial setting;
Second detecting device 5 comprises the second coil and second magnet steel of coaxial setting;
Driver 3 comprises tertiary coil and the 3rd magnet steel of coaxial setting,
Wherein, the first coil and the second coil and the 3rd magnet steel are crisscross arranged in the first measuring tube 1, first magnet steel and the second magnet steel and tertiary coil and are crisscross arranged in the second measuring tube 2.
Driver 3 and the first detecting device 4 and the second detecting device 5 by coil and magnet steel with the use of, driver 3 can be arranged at the line mid point two measuring tube bottom apex, first detecting device 4 is arranged on the first connecting portion at a distance of 2 centimetres ~ 4 centimeters, and/or second detecting device 5 be arranged on and the second connecting portion at a distance of 2 centimetres ~ 4 centimeters, jointly good closed-loop system is formed with driver 3, two of sensor measuring tube pipes are made to have stable duty, and reduce the impact of external disturbance, improve Self-regulation ability.
By the first coil, second coil and the 3rd magnet steel are crisscross arranged at the first measuring tube 1, by the first magnet steel, second magnet steel and tertiary coil are crisscross arranged in the second measuring tube 2, the first detecting device 4 can be made, the weight average of the second detecting device 5 and driver 3 is distributed on two measuring tubes, make the additional mass of two measuring tubes close, thus make the total quality of two measuring tubes close, and then make medium when flowing through two measuring tubes, the vibrational state of two measuring tubes is consistent, be distributed in two measuring tubes coriolis force everywhere consistent, amount of deflection is consistent, thus obtain accurate measurements and calculations result.
Further, the wire of the first coil, the second coil and drive coil can extend to adapting flange inside from coil itself to both sides respectively, to ensure wire quality distributed uniform.
More than be described with reference to the accompanying drawings technical scheme of the present invention, consider in correlation technique, adopt the U-tube that flexibility is very large, flowing for medium can produce larger resistance, and is difficult to ensure higher frequency of operation and mechanical quality factor, preferably stability, less crushing, stronger shock resistance and antijamming capability.By the technical scheme of the application, when mass rate and the density of measuring media, the resistance that it is caused can be reduced, ensure that measuring tube has higher frequency of operation and mechanical quality factor, preferably stability, less crushing, stronger shock resistance and antijamming capability.
In the present invention, term " first ", " second ", " the 3rd ", " the 4th " only for describing object, and can not be interpreted as instruction or hint relative importance.Term " multiple " refers to two or more, unless otherwise clear and definite restriction.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a mass flow sensor, is characterized in that, comprising:
First measuring tube and the second measuring tube, described first measuring tube is identical with described second measuring tube structure, and size is equal, is set in parallel in shell, and wherein, every root measuring tube comprises bend loss;
Driver, is arranged on bottom described bend loss, for encouraging described first measuring tube and described second measuring tube;
First detecting device, is arranged on the first end of described bend loss, for detecting the first vibration signal of described first end;
Second detecting device, is arranged on the second end of described bend loss, for detecting the second vibration signal of described second end;
Processor, for calculating the mass rate of fluid in described first measuring tube and described second measuring tube according to described first vibration signal and described second vibration signal.
2. mass flow sensor according to claim 1, is characterized in that, each measuring tube also comprises:
First inclined tube section and the second inclined tube section, described bend loss is connected to described first inclined tube section and described second inclined tube section respectively, and described first inclined tube section and described second inclined tube section are with the plane symmetry of bend loss described in vertical and decile, the axis of described first inclined tube section and the axis of described bend loss tangent, the axis of described second inclined tube section and the axis of described bend loss tangent.
3. mass flow sensor according to claim 2, is characterized in that, also comprises:
First connector, is arranged at described enclosure, is connected with the first inclined tube section of described second measuring tube with described first measuring tube;
Second connector, is arranged at described enclosure, is connected with the second inclined tube section of described second measuring tube with described first measuring tube;
First shunt, is arranged at described housing exterior, is connected with described first connector;
Second shunt, is arranged at described housing exterior, is connected with described second connector;
First flange, is arranged at housing exterior, is connected to described first shunt;
Second flange, is arranged at housing exterior, is connected to described second shunt.
4. mass flow sensor according to claim 3, is characterized in that, also comprises:
First distance plate, is arranged in the first inclined tube section of described first measuring tube and described second measuring tube, near the side of described first connector;
Second distance plate, is arranged in the first inclined tube section of described first measuring tube and described second measuring tube;
3rd distance plate, is arranged in the second inclined tube section of described first measuring tube and described second measuring tube, near the side of described second connector;
4th distance plate, is arranged in the second inclined tube section of described first measuring tube and described second measuring tube.
5. mass flow sensor according to claim 4, is characterized in that, described first distance plate apart from described first connector 2 centimetres ~ 4 centimetres,
And/or described 3rd distance plate is apart from described second connector 2 centimetres ~ 4 centimetres,
And/or described second distance plate is apart from described first distance plate 2 centimetres,
And/or described 4th distance plate is apart from described 3rd distance plate 2 centimetres,
And/or the thickness of described second distance plate and described four distance plates is equal, the thickness of described first distance plate and described 3rd distance plate is equal, and the thickness of described second distance plate is 2 ~ 3 times of the thickness of described first distance plate,
And/or described first detecting device and described first connecting portion are at a distance of 2 centimetres ~ 4 centimetres,
And/or described second detecting device and described second connecting portion are at a distance of 2 centimetres ~ 4 centimetres.
6. mass flow sensor according to claim 3, is characterized in that, also comprises:
First reinforcing sleeve, is arranged at the first inclined tube section of described first measuring tube and the connecting portion of described first connector;
Second reinforcing sleeve, is arranged at the second inclined tube section of described first measuring tube and the connecting portion of described second connector;
3rd reinforcing sleeve, is arranged at the first inclined tube section of described second measuring tube and the connecting portion of described first connector;
4th reinforcing sleeve, is arranged at the second inclined tube section of described second measuring tube and the connecting portion of described second connector.
7. mass flow sensor according to claim 6, it is characterized in that, described first connector is connected with described first reinforcing sleeve and described 3rd reinforcing sleeve by argon arc welding, described second connector is connected with described second reinforcing sleeve and described 4th reinforcing sleeve by argon arc welding, described first reinforcing sleeve, second reinforcing sleeve is respectively welded to described first measuring tube by soldering, described 3rd reinforcing sleeve, 4th reinforcing sleeve is respectively welded to described second measuring tube by soldering, described first connector and the second connector are respectively welded to described first shunt and described second shunt by argon arc welding, described first shunt and the second shunt are respectively welded to described shell by argon arc welding.
8. mass flow sensor according to any one of claim 1 to 7, is characterized in that, also comprises:
Connecting pipe and adapting flange, described connecting pipe is for connecting described shell and described adapting flange, and described adapting flange is by rubber column and connect bolt seal.
9. mass flow sensor according to any one of claim 1 to 7, is characterized in that, the axis of described bend loss is minor arc, and the radius of described minor arc is 35 centimetres ~ 55 centimetres.
10. mass flow sensor according to any one of claim 1 to 7, is characterized in that,
Described first detecting device comprises the first coil and first magnet steel of coaxial setting;
Described second detecting device comprises the second coil and second magnet steel of coaxial setting;
Described driver comprises tertiary coil and the 3rd magnet steel of coaxial setting,
Wherein, described first coil and described second coil and described 3rd magnet steel are crisscross arranged in described first measuring tube, and described first magnet steel and described second magnet steel and described tertiary coil are crisscross arranged in described second measuring tube.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109216.6A CN104776891A (en) | 2015-03-12 | 2015-03-12 | Mass flow rate sensor |
| PCT/CN2015/078103 WO2016141628A1 (en) | 2015-03-12 | 2015-04-30 | Mass flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109216.6A CN104776891A (en) | 2015-03-12 | 2015-03-12 | Mass flow rate sensor |
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| Publication Number | Publication Date |
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| CN104776891A true CN104776891A (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510109216.6A Pending CN104776891A (en) | 2015-03-12 | 2015-03-12 | Mass flow rate sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104776891A (en) |
| WO (1) | WO2016141628A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016141628A1 (en) * | 2015-03-12 | 2016-09-15 | 孙晓君 | Mass flow sensor |
| CN106768115A (en) * | 2017-01-23 | 2017-05-31 | 成都安迪生精测科技有限公司 | A kind of high vacuum mass flowmenter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872063B (en) * | 2018-09-07 | 2023-11-07 | 吉林大学 | Trace substance detection device and method based on parameter excitation and synchronous resonance |
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| CN102472652A (en) * | 2009-07-24 | 2012-05-23 | 恩德斯+豪斯流量技术股份有限公司 | Vibratory transducer and measuring device comprising such a transducer |
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| DE102008011564A1 (en) * | 2008-02-28 | 2009-09-03 | Rembe Gmbh Safety + Control | Device for measuring mass flows |
| CN104776891A (en) * | 2015-03-12 | 2015-07-15 | 孙晓君 | Mass flow rate sensor |
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| US6223605B1 (en) * | 1997-04-10 | 2001-05-01 | Endress + Hauser Flowtec Ag | Coriolis-type mass flow sensor with a single measuring tube |
| CN102472652A (en) * | 2009-07-24 | 2012-05-23 | 恩德斯+豪斯流量技术股份有限公司 | Vibratory transducer and measuring device comprising such a transducer |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2016141628A1 (en) | 2016-09-15 |
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Application publication date: 20150715 |