CN109632019A - Flowmeter - Google Patents
Flowmeter Download PDFInfo
- Publication number
- CN109632019A CN109632019A CN201811589878.8A CN201811589878A CN109632019A CN 109632019 A CN109632019 A CN 109632019A CN 201811589878 A CN201811589878 A CN 201811589878A CN 109632019 A CN109632019 A CN 109632019A
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- Prior art keywords
- rotor assembly
- blade
- measuring chute
- metering
- magnet steel
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
Abstract
The invention discloses a kind of flowmeters；Metering unit is integrally embedded in metering chamber enclosure, the metering unit includes measuring chute and the rotor assembly being mounted in measuring chute and two secondary supports being similarly installed in measuring chute, two secondary support is located at the rotor assembly both ends, the bracket includes columned cylindrical portion, by towards end face bearing and sliding bearing is successively embedded in the axial direction of rotor assembly in bearing block, the roller end of the rotor assembly connects after passing through the sliding bearing with the end face of end face bearing；The columned rectifier in honeycomb structure of two-stage is additionally provided in the arrival end of the measuring chute；A vacuum brake is equipped at the outlet end of metering unit, the vacuum brake includes body, airflow channel and mounting hole is equipped in the body, the both ends of airflow channel are communicated with the atmosphere.The flowmeter is easy to operate, and measuring accuracy is high.
Description
Technical field
The invention belongs to liquid meter technical field more particularly to a kind of metrical instruments.
Background technique
Flowmeter is widely used in daily production and living, is mainly used for the metering to liquid, when usual flowmeter measures,
Its flow regime for being detected liquid needs to be stable flow regime, often becomes disorderly during conveying for liquid
Disorderly, such as the pipeline of conveying turns round, and internal diameter variation of pipeline etc. can all cause the flow regime of fluid to be measured to change, this is right
It is a kind of tremendous influence factor for measuring accuracy.The rotor rotation of general flowmeter is all very flexible, especially speed
Formula flowmeter, volume itself is small and light, and even general air-flow is sprung up and can also be rotated with drive rotor, to cause invalid arteries and veins
Punching, influences measuring accuracy.In addition, for the liquid by flowmeter outflow, if rear end liquid is to preceding encountering variable diameter situation
Liquid is held to generate siphon, so causing air return in rear end negative pressuren zone easy to form, also causing in this way to flowmeter accuracy
Very big influence, so that flowmeter must can just obtain good measuring accuracy under ideal environment.And existing stream
The metering unit of meter is there is also rotor assembly installation complexity, and assembly precision is difficult to control, when rotor rotates under fluid impact
The biggish defect of frictional resistance between fluid.It is impaired that the above various reasons all will lead to flowmeter measuring accuracy, or makes
It is too big with limitation.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, a kind of flowmeter is provided, which efficiently solves
Current flow meter measuring accuracy is not high, uses the big technical problem of limitation.
Technical scheme is as follows:
A kind of flowmeter, including metering unit；The metering unit is integrally embedded in metering chamber enclosure, the measurement unit
Part includes measuring chute and the rotor assembly being mounted in measuring chute and two secondary supports being similarly installed in measuring chute, two pair
Bracket is located at the rotor assembly both ends, and the bracket includes columned cylindrical portion, on the cylindrical surface of cylindrical portion with
It is rounded centered on the center of circle of cylindrical portion to be connected with several shunting gussets, the outer ledge for shunting gusset and metering in array
Storehouse inner wall connects and is fixed in measuring chute；It is embedded with bearing block in one end end face of the cylindrical portion towards rotor assembly, in axis
It holds in seat by, successively embedded with end face bearing and sliding bearing, the roller end of the rotor assembly is worn in the axial direction towards rotor assembly
Connect after crossing the sliding bearing with the end face of end face bearing；It is additionally provided with that two-stage is columned to be in the arrival end of the measuring chute
The rectifier of honeycomb structure, the rectifier face are located at the bracket of arrival end；And in two pipeline sections between rectifier
Wall is equipped with a pair of of liquid detection sensor, and two liquid detection sensors are oppositely arranged in the horizontal plane.
A vacuum brake is equipped at the outlet end of the metering unit, the vacuum brake includes body, institute
It states and is equipped with airflow channel and mounting hole in body, wherein the airflow channel is three sub-channels successively join end to end and are in Π
The both ends of the air flow channel of type, the airflow channel are communicated with the atmosphere, and the mounting hole is positioned vertically within the airflow channel
Between two subchannels being vertically arranged, and the top of mounting hole is connected to the horizontal sub-passages of airflow channel, bottom end with it is described
The outlet end of metering unit is connected to；Pressure regulating device is installed in the mounting hole, the pressure regulating device from top to bottom successively wraps
Valve seat, sliding sleeve, guide ring are included, valve seat is embedded in the top of mounting hole, from top to bottom has on the axis of valve seat and abut each other connection
Cylindrical hole and conical bore and conical bore big end downward, cylindrical hole is connected to the horizontal sub-passages, and the guide ring is fixedly
It is mounted on the lower part in mounting hole；The guide ring is stretched out in the valve rod bottom end of spool, at the top of bulb be located at the circular cone
At the portlet in hole, be cased with cylindrical spring on the valve rod between the guide ring and sliding sleeve, described cylindrical spring one end with lead
Connect to ring end face, the other end sliding sleeve is jacked up upward and make the periphery of the gasket being sandwiched between bulb and sliding sleeve with
The inner wall close proximity of the conical bore；Also have on the guide ring connection metering unit outlet end and guide ring and valve seat it
Between cavity perforation.
Preferably, the shunting gusset includes the trapezoidal plate and lug plate for being slab construction, and the trapezoidal plate is at right angle
Trapezoidal shape, the inclination waist in two waist of trapezoidal plate are arranged towards rotor assembly one end and by dipping down in the axial direction towards rotor assembly
Tiltedly, another waist that the lug plate is integrally connected to trapezoidal plate leans at the right-angled apices of measuring chute port edge, so that
It obtains lug plate and trapezoidal plate and forms a rectangular-shaped step away from that bottom edge of cylindrical portion；The measuring chute is cylindrical
Tubular structure, and its both ends is respectively fitted on the step so that two secondary supports are mounted on the two of measuring chute with being respectively embedded into formula
End.
Preferably, the rotor assembly be turbine assembly, the turbine assembly include mandrel and on mandrel along its length
The blade that direction is helically arranged；The helical blade is equipped with the oppositely oriented of two and two blades, and two blades are set respectively
It sets in the two opposite sides of mandrel；It is embedded with the first magnet steel respectively at its both ends on every blade, two on every blade the
The second magnet steel is also embedded between one magnet steel, one end polarity of all first magnet steel towards blade outboard is identical, and two second magnet steel are towards leaf
One end polarity on the outside of piece is opposite.Further, the blade is double leads, and every blade includes the survey being linked together
Measure section and stress section, wherein measuring section lead is P1, axial length L1, and stress section lead is P2, axial length L2, P1 >
P2, L1 > L2.
Preferably, the dirt filtrating screen for covering all the portlet of the conical bore is additionally provided at the top of the valve seat.
Preferentially, the electronic watch head of display flow information is also equipped on the metering chamber enclosure, the electronic watch head passes through
Two supported signal sensors in metering room housing are mounted on to obtain flow information, the position of the signal transducer installation should make
It obtains in turbine rotation, two first magnet steel can respectively correspond two supported signal sensors, and second magnet steel also individually corresponds to
One supported signal sensor.
Preferentially, the arrival end of the level-one rectifier is covered with the filter screen for filtering.
Preferentially, the level-one rectifier is to wait hexagonal honeycombs shape structure；The aperture of the hexagonal honeycomb shape structure
No more than 4.8mm, wall thickness is not in 0.1mm.
Preferentially, lock ring is gone back on the outside of the bracket a steel ring, and the steel ring is the round steel ring of non-close and from branch
Being radially inserted into for frame shunts gusset edge and fixes；The cylindrical portion axis is equipped with oil filler point, the oil filler point and the axis
Hold the conduction hole coaxial communication on an axis.
Beneficial effects of the present invention: turbine assembly mounting structure of the invention has its substantive distinguishing features very huge beneficial
Effect, on the one hand, the present invention by rotor assembly by special shunting gusset array at bracket be supported and fixed in measuring chute,
While being easily installed and simplify structure, but also fluid better flows through rotor assembly, play the role of shunting, support, and
End face bearing and sliding bearing are set gradually in the bracket, have been perfectly matched fortune of the rotor assembly when fluid impact rotates
Dynamic state, so that rotor rotation is more flexible reliable, abrasion is smaller, and the service life is longer, so that it is guaranteed that metering unit is accurate
Reliability.On the other hand, a special vacuum brake is provided at the outlet end of metering unit, which can
To prevent the vacuum environment in metering unit exit from generating, thus during being effectively prevented oil product inflow buried tank, in pipe
Rear end liquid generates siphonage to front end liquid when diameter becomes larger, and is inherently eliminated air return and does to measuring accuracy generation
It disturbs, and the vacuum brake structure in the present invention is simple, compact, convenient for assembly and disassembly, to flow measurement instrument after cooperating with rotor assembly
The measuring accuracy of device greatly facilitates effect.In order to solve the problems, such as that measured medium fluidised form, the present invention are particularly provided with
The rectifier of two-stage specially made structure is forced liquid becoming laminar flow from turbulent flow, and this rectifier rectification effect is significantly better than existing
Some rectifier structures, to promote the measuring accuracy of oil discharge metering installation.Also, the most important, the present invention in order to
The error for preventing air-flow drive rotor from generating, provided with the liquid detection sensor that a pair is oppositely arranged, to be detected in liquid
Just driving flowmeter metering when sensor detects the signal that liquid flows through, avoids air together with vacuum brake and brings
Interference, effectively improve the measuring accuracy of flowmeter.
Detailed description of the invention
Fig. 1 is cross-sectional view of the invention.
Fig. 2 is the longitudinal sectional view of metering unit of the invention.
Fig. 3 is the explosive view of metering unit.
Fig. 4 is the mounting structure schematic diagram of rotor assembly and bracket.
Fig. 5 is the explosive view of structure shown in Fig. 4.
Fig. 6 is a kind of structural schematic diagram of rotor assembly.
Fig. 7 is using the signal acquisition schematic diagram shown in Fig. 6 when rotor assembly.
Fig. 8 is the cross-sectional view of pressure regulating device.
Fig. 9 is the explosive view of pressure regulating device.
Figure 10 is rectifier structure schematic diagram.
Scheme of installation when Figure 11 is the standard of the present invention installation with a pair of of liquid detection sensor.
Figure 12 is the scheme of installation when present invention installation with a pair of of liquid detection sensor has offset.
Figure 13 is the different correlation radius schematic diagrames of same blade.
Figure 14 is the motion analysis figure at different correlation radiuses.
Figure 15 is the relation schematic diagram of the spiral angle β and radius R at different correlation radiuses.
Figure 16 be α=β when flow direction at correlation radius with helical angle relation schematic diagram.
Figure 17 be because incidence angle there are due to influence schematic diagram to turbine surfaces flow field.
The structural schematic diagram that Figure 18 is blade when being double lead structures.
Component label instructions: level-one rectifier 4, elastic spring 5, liquid detection pipeline section 6, liquid detection sensor 7, metering
Component, mandrel 9, blade 10, the first magnet steel 11, the second magnet steel 12, measuring chute 14, rotor assembly 15, bracket 16, rectifier 17,
Bearing block 18, sliding bearing 19, shaft 20, end face bearing 21, oil filler point 22, steel ring 23, shunt gusset 24, lug plate 2401,
Trapezoidal plate 2402, notch 25, cylindrical portion 26, body 27, subchannel 2701, dirt filtrating screen 28, valve seat 29, bulb 30, gasket
31, sliding sleeve 32, valve rod 33, cylindrical spring 34, guide ring 35, circlip 36, second level rectifier 37, turbine flowmeter 38, electricity
Sublist head 39, metering chamber enclosure 43, signal transducer 46, temperature sensor 47.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Present invention will be further explained below with reference to the attached drawings and examples:
As shown in Figure 1, a kind of flowmeter, metering unit is integrally embedded in metering chamber enclosure 43, the metering unit
Preferably turbine flowmeter 38, compact-sized, take up space small, measuring accuracy is higher.The metering unit is integrally embedded in meter
It measures in chamber enclosure 43, this is because the variation of device internal pressure will lead to the volume of related liquid because compression influences to change
Become, due to the change in calibrating with Fluid pressure when operation, the aggregating characteristic of traditional turbine flowmeter 38 can be changed, this
Sample will result in the inaccuracy of measurement, and the flowmeter of the present embodiment uses vessel design, that is, as measuring chute component
Turbine flowmeter 38, which can be used as a separate unit, to be existed, so as to so that the influence of any change in fluid pressure is reduced to zero.
In fact, the pressure of measuring section and the pressure of surfaces externally and internally are identical in device, therefore this measuring section will not be by fluid pressure
The influence of power and change.
As shown in Fig. 2-5, the above-mentioned metering unit of the present embodiment include measuring chute 14 and be mounted in measuring chute 14 turn
Sub-component 15, further includes two secondary supports 16 being similarly installed in measuring chute 14, which is located at the rotor
15 both ends of component, the bracket 16 includes columned cylindrical portion 26, with the circle of cylindrical portion 26 on the cylindrical surface of cylindrical portion 26
Rounded centered on the heart to be connected with several shunting gussets 24 in array, preferably preferably 4 pieces shunting 24 arrays of gusset are arranged, and described point
The outer ledge of stream gusset 24 connects with 14 inner wall of measuring chute and is fixed in measuring chute 14.In the cylindrical portion 26 towards rotor set
One end end face of part 15 is embedded with bearing block 18, by towards being successively embedded with end face axis in the axial direction of rotor assembly 15 in bearing block 18
Hold 21 and sliding bearing 19,20 end of shaft of the rotor assembly 15 pass through after the sliding bearing 19 with end face bearing 21
End face connects；End face bearing 21 and sliding bearing 19 herein can be used graphite and be made, and hardness is high, and self-lubricating effect is good, makes
Rotor assembly 15 rotates more flexible, end face bearing 21, which limits, goes to the axial movement value of component, and sliding bearing 19 and end
The cooperation of spherical bearing 21 is so that rotor rotates flexibly at work and will not generate violent oscillation, relative to existing some uses
The mounting means of deep groove ball bearing has apparent above-mentioned advantage.It is cylindric that two-stage is additionally provided in the arrival end of the measuring chute 14
The rectifier 17 (level-one rectifier 4, second level rectifier 37) in honeycomb structure, 17 face of rectifier is located at arrival end
The bracket 16, the rectifier 17 is longitudinal to be equipped with several uniformly densely covered thin through-holes, and rectification effect is fabulous, can will turbulent flow effectively
Ground is adjusted to laminar flow, the installation for rectifier 17, may be selected to install one section of round pipe additional in 14 arrival end of measuring chute, or will meter
It measures storehouse 14 to lengthen, directly be periodically installed at the arrival end of measuring chute 14.Importantly, in the present embodiment, two rectifiers 17 it
Between pipeline section inner wall be equipped with a pair of of liquid detection sensor 7, two liquid detection sensors 7 are oppositely arranged in the horizontal plane, system
As when may be provided in special liquid detection pipeline section 6.Herein crucially, liquid detection sensor 7 is equipped with a pair, and two liquid are visited
It surveys sensor 7 to be oppositely arranged in the horizontal plane, why two liquid detection sensors 7 is set herein, be because pacifying manually
There are certain errors when dress flowmeter, so checking liquid signals using two sensors, two sensors are opposite to be in horizontal
Position, as long as thering is one to have signal, then meaning that in pipeline has liquid to pass through.As shown in Figure 11-12, if by this two width figure
In the sensor on right side remove, then sensor can be contacted with liquid in Figure 11, and if while installing entire Unloading Metering
The certain small angle of device rotation offset, becomes state shown in Figure 12, it is then clear that the sensor in left side is at this time
It can not be contacted with liquid, but have liquid process in pipeline really at this time, i.e., can generate measurement error, if however relatively
It is mounted with two, then rotation offset how many degree when no matter installing, all at least having a sensor can contact with liquid, just
True ground feedback signal.The level-one rectifier 4 is installed on the intersection by itself and entrance pipeline section 2 on outlet pipe section 3, so as to more
It is early preferably to play rectified action.
In addition, the present embodiment is equipped with a vacuum brake also at the outlet end of the metering unit, such as 9 institute of Fig. 8-
Show, the vacuum brake includes body 27, and the body 27 is substantially cylindrical, is equipped with airflow channel and peace in the body 27
Hole is filled, which is the aperture minimum of stepped hole and top.The airflow channel is three sub-channels 2701 successively head and the tail
It is connected and is in the air flow channel of Π type, what which can be formation itself is the flow passage route of Π type, is also possible to a tool
There is the cavity being connected with outside atmosphere in Π type section.The both ends of the airflow channel are communicated with the atmosphere, and the mounting hole is perpendicular
Directly between two subchannels 2701 being vertically arranged of the airflow channel, and the water on the top of mounting hole and airflow channel
Flat subchannel 2701 is connected to, and bottom end is connected to the outlet end of the metering unit, so that airflow channel passes through mounting hole energy
Wait for an opportunity to be connected to the outlet end of metering unit.
The present embodiment is equipped with the pressure regulating device for adjusting inside and outside air pressure balance in the mounting hole, i.e., under certain condition
Breaking vacuum environment.The pressure regulating device from top to bottom successively includes valve seat 29, sliding sleeve 32, guide ring 35, and valve seat 29 is embedded in peace
The top in hole is filled, from top to bottom there is the cylindrical hole for abutting each other connection and conical bore and conical bore big end on the axis of valve seat 29
Downward, cylindrical hole is connected to the horizontal sub-passages 2701, and the guide ring 35 is fixedly mounted in the lower part in mounting hole, is led
At the lower port being preferably coaxially embedded in mounting hole to the outer wall of ring 35.The guide ring 35 is stretched out in 33 bottom end of valve rod of spool,
Bulb 30 at the top of it is located at the portlet of the conical bore, so that spool is similar to rivet-like structure.In the guide ring
Cylindrical spring 34 is cased on valve rod 33 between 35 and sliding sleeve 32, described 34 one end of cylindrical spring connects with 35 end face of guide ring,
To be squeezed cylindrical spring 34 upward by guide ring 35, the other end of cylindrical spring 34 therewith jacks up sliding sleeve 32 upward, and
So that the gasket 31 being sandwiched between bulb 30 and sliding sleeve 32 also moves up so that the periphery that encloses of gasket 31 with
The inner wall close proximity of the conical bore realizes sealing；Also there is connection metering unit outlet end on the guide ring 35 and lead
Perforation to cavity between ring 35 and valve seat 29.
When external and internal pressure is atmospheric pressure, as described above, the court that the sealing of vacuum brake is provided by cylindrical spring 34
On elastic force realize；When there is liquid positive pressure in inside, fluid pressure squeezes gasket 31, is further formed reliable close
Envelope；When having negative pressures inside metering unit, precompression more than cylindrical spring 34 itself to gasket 31 upward, then spool
It under atmospheric pressure promotion, moves down, gasket 31 is driven to separate with conical bore inner wall, so that ambient atmosphere enters inside, prevent
Only vacuum environment is formed.Originally it is that embodiment uses valve seat 29 for conical bore, circular cone positioning is formed with spool, so that vacuum brake
Equal energy parking position accuracy after opening every time, and gasket 31 is folded between the bulb 30 at the top of sliding sleeve 32 and spool, can be made
Gasket 31 is obtained convenient for assembly and disassembly replacement, preferably cooperatively forms sealing with cylindrical spring 34.
It is docked with 43 arrival end of metering chamber enclosure and liquid is made to detect pipeline section in the liquid detection 6 outlet end of pipeline section
The arrival end coaxial communication of 6 pore and the turbine flowmeter 38, the liquid detection pipeline section 6 and turbine flowmeter 38 it
Between be additionally provided with Rectigon section, the Rectigon section be embedded in metering chamber enclosure 43 in and the entrance with turbine flowmeter 38
End is coaxial docking, and is embedded with second level rectifier 37 in Rectigon section, second level rectifier 37 and the level-one rectifier 4 are coaxial
Alignment promotes commutating character.
In order to obtain better effect, it is preferable that for the mounting structure of rotor assembly, above-mentioned shunting gusset 24 includes equal
For the trapezoidal plate 2402 and lug plate 2401 of slab construction, the trapezoidal plate 2402 is at right-angled trapezium shape, 2402 liang of waists of trapezoidal plate
In inclination waist be arranged towards 15 one end of rotor assembly and by being tilted down in the axial direction towards rotor assembly 15, the lug plate
2401 are integrally connected to another waist of trapezoidal plate 2402 at the right-angled apices of 14 port edge of measuring chute, so that convex
Otic placode 2401 and trapezoidal plate 2402 are away from one rectangular-shaped step of that bottom edge of cylindrical portion 26 formation.The measuring chute 14 is
Cylindrical tubular structure, and its both ends is respectively fitted on the step so that two secondary supports 16 are mounted on being respectively embedded into formula
The both ends of measuring chute 14.The structure makes bracket 16 have comparable knot under the premise of the smooth inflow and outflow of guarantee fluid
Structure intensity ensure that the stability of the installation of rotor assembly 15 and work, provide the foundation for accurate metering.For improving performance, institute
It states and offers a notch 25 at the right-angle corner of step, so that precision is more preferably processed and guaranteed at the right-angle surface of step, thus
When preventing from the right angle electrical of the step being in non-standard right-angle surface because of mismachining tolerance, match with the port edge face of measuring chute 14
Conjunction is not close, causes bracket 16 to install rear axle line offset, causes the offset of 15 mounting axis of rotor assembly.The shunting gusset 24
Bottom edge and cylindrical portion 26 it is axial parallel, promote its structural strength and guide the performance of fluid process.As shown in figure 5, described
Sliding bearing 19 be annular structure, the end face bearing 21 be one end be in plane, the spherical cylindrical structure of the other end, and its
The cambered surface culminating point of sphere end connects with the end of the shaft 20, which better assures that the flexible of rotor assembly 15
Reliability.Furthermore it is preferred that the axis of the cylindrical portion 26 is equipped with oil filler point 22, the oil filler point 22 and the bearing block
Conduction hole coaxial communication on 18 axis, in order to oil injecting lubricating.
The rotor assembly of the present embodiment, optimal selection are turbine assembly, i.e., aforementioned preferred turbine flowmeter, such as Fig. 6 institute
Show, including mandrel 9 and the blade being helically arranged along its length on mandrel 9 10；The helical blade 10 is equipped with two
And two blades 10 is oppositely oriented, two blades 10 are separately positioned on the two opposite sides of mandrel 9.It is leaned on every blade 10
The first magnet steel 11 is embedded at both ends respectively, the second magnet steel 12, institute are also embedded between two first magnet steel 11 on every blade 10
One end polarity for having the first magnet steel 11 towards 10 outside of blade is identical, one end polarity phase of two second magnet steel 12 towards 10 outside of blade
Instead.In the present embodiment, there are 3 magnet steel on each blade 10 of turbine assembly, two blades 10 amount to 6 magnet steel, blade 10
Upper 4 magnet steel polarity by outer end are identical, and intermediate 2 magnet steel polarity are on the contrary, when in use, outer end magnet steel center is directed at flowmeter
Signal transducer (not shown) on shell, for the output of metrical pulse, intermediate 2 magnet steel are used for turbine rotation direction
Determine, prevents turbine assembly reversion when liquid reflux from causing to count, the sensor that intermediate magnet steel signal detection uses preferably is selected as magnetic
Tunnel sensor is hindered, is output high level when detecting that polarity is N variation, exports low level when polarity changes from S, rotate
When walking direction, as shown in fig. 7, being detected as in high level period when rotating forward in M signal, right end exports pulse advancing
Pulse is exported in left end, when rotating backward, left end exports pulse advancing and exports pulse in right end, accurately determines turbine group with this
Whether part inverts (oil product reflux), so that the data information of reversion not to be included within the data area of metering.The turbine assembly
Small in size, light weight is easy to rotate, using two derotations to blade as rotor, the set-up mode of magnet steel not only can be with
Accurately detect that the rotary speed information of turbine with detection flows information, can also realize that positive and negative rotation detects, after emptying
Fluid reflux data exclude except Unloading Metering data so that metering is more accurate, and make from structure turbine assembly with
The contact resistance of fluid is smaller, greatly promotes service life and reliability, in conjunction with the above-mentioned mounting structure of rotor assembly, can make
Obtaining entire metering units has high measuring accuracy and reliability.Going back lock ring in the outside of the bracket 16 has steel ring
23, the steel ring 23 is the round steel ring of non-close and fixes from the edge for being radially inserted into shunting gusset 24 of bracket 16,
All shunting gussets 24 are linked together, so that the structure of entire bracket 16 is more stable.
In the vacuum brake of the present embodiment, the guide ring 35 is annular in shape, offers on its annulus end face described
Perforation；The card slot installed for check ring clamping is equipped on the inner wall of the mounting hole, after check ring is caught in the card slot
By holding out against the cylindrical spring 34 upwards to the thrust upward of guide ring 35.Check ring take up space it is small, installation convenience, fit
Share in the installation of guiding annulus herein and its to the axially position of cylindrical spring 34, will not to body 27 and flow components it
Between communication port cause excessively to block so that ventilation it is smooth.It is additionally provided at the top of the valve seat 29 by the small of the conical bore
The dirt filtrating screen 28 that port covers all, so that preventing dust dregs from entering in metering unit when exchanging air-flow with the external world.
The body 27 and metering unit thread connection, convenient for assembly and disassembly.The body 27 is equipped with two air flow channels, two skies
The cross-shaped setting of flow channel；Alternatively, the airflow channel includes the circular cavity being located at the top of mounting hole, the circle
Cavity is surrounded by four cylindrical holes communicated therewith.These design structures can obtain preferable air-flow exchange effect.
Preferentially, the electronic watch head 39 of display flow information, the electronic watch head are also equipped on the metering chamber enclosure 43
39 obtain flow information by two supported signal sensors 46 being mounted in metering room housing, and the signal transducer 46 is installed
Position should make turbine (rotor assembly) rotate when, two first magnet steel 11 of turbine surfaces can go to therewith one by one face it
Place, so that signal when signal transducer 46 is passed through by detecting first magnet steel 11 obtains flow information, in this way, signal is examined
It surveys and uses two paths of signals, can mutually calibrate, fully ensure that measuring accuracy.Correspondingly, the second magnet steel 12 also has and is corresponding to it
A supported signal sensor 46, detect positive and negative rotation with corresponding.And to meet client's V20 hair oil, can also to the liquid flowed through into
Trip temperature compensation, so this flowmeter is also equipped with pt1000 temperature sensor 47 in the top of the outlet end of measuring chute 14, so as to
The data on flows of electronic watch head detection is compensated in temperature change, it is ensured that measuring accuracy.
Preferentially, several waist holes are equipped with along its circumferencial direction on the tube wall of the straight pipe, all waist holes are with straight pipe
Axis on point be the rounded array in the center of circle, all waist holes by the perspective part closure, both to ensure that fluid flows through
To the protection of pipeline when pipeline section, and it can intuitively observe fluid state.Further to promote effect, the outlet of the elbow body
3 middle part of pipeline section is fixedly cased with a coaming plate, and the edge of coaming plate is equipped with several towards the strip fin plate of outside protrusion, wherein
The angular bisector of two fin plates 90 degree and its angle each other is located on vertical direction, vertical on the two of them fin plate
It is fixed with a handle 42 for deviating from elbow component, entire flow device is allowed to realize that its is portable by gripping handle 42
Property.
Preferentially, the arrival end of the level-one rectifier 4 is covered with the filter screen for filtering, to filter out in fluid
The rubbish such as particle, dross, prevent level-one rectifier 4 from blocking, protective effect also played to metering unit (flowmeter).
Preferentially, the structure of firsts and seconds rectifier is as shown in Figure 10, using etc. the cellular stainless steel material in six sides,
It selects the aperture of hexagon to be not more than 4.8mm according to detectability, is proof strength, wall thickness is not less than 0.1mm, global shape
It is processed as circle, elbow component is packed into, is fixed with elastic spring 5, fabulous rectification effect, and intensity and peace can be obtained
Dress unfailing performance attains full and complete satisfaction.
Further, the angle between the entrance pipeline section 2 and outlet pipe section 3 of the elbow body is 10~30 degree, i.e., two
Acute angle after the intersection of pipeline section axis, the elbow modular construction strength and stability under the angle is more preferable, is conducive to fluid
Disturb small as far as possible, to be especially more suitable at most of RTC unloading straight pipe at present abutting joint.
In addition, being directed to the turbine assembly 38 of metering unit, it is preferable that its blade is double leads, and every blade wraps
Include the measuring section being linked together and stress section, wherein measuring section lead is P1, and axial length L1, stress section lead is P2, axis
It is L2 to length, then needs P1 > P2, L1 > L2, the design considerations for meeting the Parameter Conditions is as follows:
Different correlation radiuses on one blade of turbine assembly are as shown in figure 13: the first radius (R/R0=0.2) is close
Rotor hub；Centre of second radius in width of blade direction；The last one radius is in outer dia rim faces.
Fluid mobility status at each radius passes through the mean flow rate V (such as giving a definition) in pipeline
With the tangential velocity R ω (being defined by a radius and an angular speed) of certain point, in available rotation
The spot speed V of liquid around a certain solid pointR, VRIn corresponding radius R/R0Upper, V as shown in figure 14 with R ω and V relationshipRWith
Angle between V:
As shown in figure 15, by structure and definition, the spiral angle β of a helical blades is related with radius R, β and half
The relational expression of diameter R and lead P are as follows:
As shown in figure 16, as α=β, the incidence angle between blade surface and fluid on any radius is zero.
In fact, since the resistances such as liquid resistance, mechanical friction exist, to reach such perfect condition can not,
For flow direction and helical turbine blade in this way there are incidence angle, the presence of incidence angle will make fluid generate whirlpool in blade surface
Stream generates interference to measuring accuracy, and interference is as shown in figure 17.
To solve this problem, as shown in figure 18: blade is divided into measurement using double leads by the blade construction of turbine assembly
Section and stress section two parts, measuring section lead are P1, and axial length L1, stress section lead is P2, axial length L2.
The design of stress section is in order to offset the resistance being subject to during turbine rotation, P1 > P2 and L1 > L2, thus
It ensure that the perfect condition of Figure 16 is realized in the flow field on measuring section, stress section is in fluid outlet side, although there is also enter for stress section
Firing angle, but L2 is shorter, and the whirlpool of generation just releases metering region by leading portion liquid quickly before also not influencing turbine, right in this way
The influence of turbine can be ignored.
In specific production, the spiral shaped edges of blade 10 where the first magnet steel 11 and the second magnet steel 12 are installed in respectively
On face, magnet steel signal is received in order to install and be conducive to sensor.And second magnet steel 12 is mounted on the axial length of blade 10
The middle part on direction is spent, can equally be easily installed and is conducive to sensor reception magnet steel signal.The blade 10 and mandrel 9 one
It is body formed, there is lesser resistance when promoting the integral strength stability of entire turbine assembly and contacting with liquid.The mandrel 9
Both ends be coaxially embedded with a shaft respectively, one end of the shaft is embedded in 9 end face of mandrel, and shaft installation end 13 stretches out blade
10 end faces, in order to be mounted in corresponding measuring room, simultaneously because end is easiest to wear, it is therefore, this dismountable
Shaft is also convenient for later maintenance replacement.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of flowmeter, including metering unit；It is characterized in that, the metering unit is integrally embedded in metering chamber enclosure,
The metering unit includes measuring chute and the rotor assembly being mounted in measuring chute and two pairs being similarly installed in measuring chute
Bracket, two secondary support are located at the rotor assembly both ends, and the bracket includes columned cylindrical portion, in cylindrical portion
It is rounded centered on the center of circle of cylindrical portion on cylindrical surface to be connected with several shunting gussets, the outside for shunting gusset in array
Edge connects with measuring chute inner wall and is fixed in measuring chute；Axis is embedded in one end end face of the cylindrical portion towards rotor assembly
Seat is held, by towards being successively embedded with end face bearing and sliding bearing in the axial direction of rotor assembly in bearing block, the rotor assembly
Roller end connects after passing through the sliding bearing with the end face of end face bearing；Two-stage is additionally provided in the arrival end of the measuring chute
The columned rectifier in honeycomb structure, the rectifier face are located at the bracket of arrival end, and two rectifiers it
Between pipeline section inner wall be equipped with a pair of of liquid detection sensor, two liquid detection sensors are oppositely arranged in the horizontal plane；
A vacuum brake is equipped at the outlet end of the metering unit, the vacuum brake includes body, the machine
It is equipped with airflow channel and mounting hole in vivo, wherein the airflow channel is three sub-channels successively join end to end and are in Π type
The both ends of air flow channel, the airflow channel are communicated with the atmosphere, and it is two perpendicular to be positioned vertically within the airflow channel for the mounting hole
Between the subchannel being directly arranged, and the top of mounting hole is connected to the horizontal sub-passages of airflow channel, bottom end and the metering
The outlet end of component is connected to；Pressure regulating device is installed in the mounting hole, the pressure regulating device from top to bottom successively includes valve
Seat, sliding sleeve, guide ring, valve seat are embedded in the top of mounting hole, from top to bottom have the circle for abutting each other connection on the axis of valve seat
Post holes and conical bore and conical bore big end is downward, cylindrical hole is connected to the horizontal sub-passages, and the guide ring is fixedly mounted
Lower part in mounting hole；The guide ring is stretched out in the valve rod bottom end of spool, at the top of bulb be located at the conical bore
At portlet, cylindrical spring, described cylindrical spring one end and guide ring are cased on the valve rod between the guide ring and sliding sleeve
End face connects, the other end sliding sleeve is jacked up upward and make the periphery for the gasket being sandwiched between bulb and sliding sleeve with it is described
The inner wall close proximity of conical bore；Also have on the guide ring empty between connection metering unit outlet end and guide ring and valve seat
The perforation of chamber.
2. flowmeter according to claim 1, it is characterised in that: the shunting gusset includes the trapezoidal plate for being slab construction
With lug plate, at right-angled trapezium shape, the inclination waist in two waist of trapezoidal plate is arranged and presses towards rotor assembly one end the trapezoidal plate
It is tilted down on towards the axial direction of rotor assembly, the lug plate is integrally connected to another waist of trapezoidal plate by measuring chute end
At the right-angled apices at mouth edge, so that lug plate and trapezoidal plate form a rectangular-shaped platform away from that bottom edge of cylindrical portion
Rank；The measuring chute is cylindrical tubular structure, and its both ends is respectively fitted on the step so that two secondary supports are distinguished
Embeddedly it is mounted on the both ends of measuring chute.
3. flowmeter according to claim 1, it is characterised in that: the rotor assembly is turbine assembly, the turbine assembly
The blade being helically arranged along its length including mandrel and on mandrel；The helical blade is equipped with two and two blades
It is oppositely oriented, two blades are separately positioned on the two opposite sides of mandrel；It is embedded with the at its both ends respectively on every blade
One magnet steel, is also embedded with the second magnet steel between two first magnet steel on every blade, and all first magnet steel are towards the one of blade outboard
Hold polarity identical, one end polarity of two second magnet steel towards blade outboard is opposite.
4. flowmeter according to claim 3, it is characterised in that: the blade is double leads, and every blade includes
The measuring section and stress section being linked together, wherein measuring section lead is P1, and axial length L1, stress section lead is P2, axial
Length is L2, P1 > P2, L1 > L2.
5. flowmeter according to claim 1, it is characterised in that: be additionally provided at the top of the valve seat by the conical bore
The dirt filtrating screen that portlet covers all；The arrival end of the level-one rectifier is covered with the filter screen for filtering.
6. flowmeter according to claim 1, it is characterised in that: be also equipped with display flow information on the metering chamber enclosure
Electronic watch head, the electronic watch head obtain flow information by two supported signal sensors being mounted in metering room housing, institute
The position for stating signal transducer installation should make when turbine rotates, and two first magnet steel can respectively correspond two supported signals sensing
Device, second magnet steel also individually correspond to a supported signal sensor.
7. flowmeter according to claim 1, it is characterised in that: all rectifiers are to wait hexagonal honeycombs shape structure；It is described
The aperture of hexagonal honeycomb shape structure is not more than 4.8mm, and wall thickness is not in 0.1mm.
8. flowmeter according to claim 1, it is characterised in that: going back lock ring on the outside of the bracket has steel ring, the steel
Circle be non-close round steel ring and from bracket be radially inserted into shunt gusset edge and fix；The cylindrical portion axis is equipped with
Conduction hole coaxial communication on oil filler point, the oil filler point and the bearing block axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811589878.8A CN109632019A (en) | 2018-12-25 | 2018-12-25 | Flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811589878.8A CN109632019A (en) | 2018-12-25 | 2018-12-25 | Flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109632019A true CN109632019A (en) | 2019-04-16 |
Family
ID=66077129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811589878.8A Pending CN109632019A (en) | 2018-12-25 | 2018-12-25 | Flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109632019A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112998229B (en) * | 2021-02-07 | 2023-05-05 | 重庆渝玫食品有限公司 | Garlic soaking process and automatic filling system thereof |
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| CN101629837A (en) * | 2009-02-10 | 2010-01-20 | 中国人民解放军总后勤部油料研究所 | Liquid turbine flow meter and flow measuring method thereof |
| CN202327267U (en) * | 2011-11-30 | 2012-07-11 | 杭州福朗机电科技有限公司 | Vacuum breaker valve |
| CN203837751U (en) * | 2014-03-20 | 2014-09-17 | 森格斯输配设备(宁波)有限公司 | Metering system for turbine |
| RU171019U1 (en) * | 2017-02-07 | 2017-05-17 | Публичное акционерное общество "Транснефть" (ПАО "Транснефть") | Turbine Flow Transmitter |
| CN108731760A (en) * | 2018-05-28 | 2018-11-02 | 扬州大学 | A kind of device and its online test method of on-line checking siphon outlet conduit startup and shutdown phase flow |
| CN209131738U (en) * | 2018-12-25 | 2019-07-19 | 重庆耐德工业股份有限公司 | A kind of flowmeter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88211107U (en) * | 1988-02-23 | 1988-11-09 | 常州市特种流量仪表厂 | Flow meter for atmosphere sampling pump |
| CN2071734U (en) * | 1990-03-30 | 1991-02-20 | 汉寿县岩汪湖电力排灌管理站 | Valve for reducing vacuum of siphon automatically |
| CN101629837A (en) * | 2009-02-10 | 2010-01-20 | 中国人民解放军总后勤部油料研究所 | Liquid turbine flow meter and flow measuring method thereof |
| CN202327267U (en) * | 2011-11-30 | 2012-07-11 | 杭州福朗机电科技有限公司 | Vacuum breaker valve |
| CN203837751U (en) * | 2014-03-20 | 2014-09-17 | 森格斯输配设备(宁波)有限公司 | Metering system for turbine |
| RU171019U1 (en) * | 2017-02-07 | 2017-05-17 | Публичное акционерное общество "Транснефть" (ПАО "Транснефть") | Turbine Flow Transmitter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112998229B (en) * | 2021-02-07 | 2023-05-05 | 重庆渝玫食品有限公司 | Garlic soaking process and automatic filling system thereof |
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