CN87214686U - Volumetric mass flowmeter - Google Patents
Volumetric mass flowmeter Download PDFInfo
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- CN87214686U CN87214686U CN 87214686 CN87214686U CN87214686U CN 87214686 U CN87214686 U CN 87214686U CN 87214686 CN87214686 CN 87214686 CN 87214686 U CN87214686 U CN 87214686U CN 87214686 U CN87214686 U CN 87214686U
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- pressure
- temperature
- mass flowmeter
- corrugated tube
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Abstract
The utility model discloses a volumetric mass flowmeter, which is a meter for measuring the mass flow of the liquid. The volumetric mass flowmeter comprises five parts; a temperature measuring mechanism with the adjustable volume, a sliding rod type compensation computing mechanism, a counting mechanism with the changeable volume, a debugging mechanism and a display part. The utility model provides a mass flowmeter applicable for the high temperature and the high pressure as well as applicable for the normal temperature and the normal pressure carrying out the simultaneously compensation for the density of the temperature and the pressure. The utility model has the advantages of wide range of application, high precision and high reliability; the volumetric mass flowmeter can be widely applicable for the fields of the chemical industry, the circulation of the liquid merchandise, etc.
Description
A kind ofly be used to measure, the instrument of controlling liquid mass rate or weight flow.
Along with the development of industrial production technology, the production economic benefit is estimated in the raising of automatization level, in the liquid commodity process of circulation, more and more requires the skill quality of controlling liquid.The promulgation of 8 or five years China's measurement Laws, and regulation adopts International system of units.This just to the quality of control, measurement liquid, has proposed urgency.
Present situation is to be applicable to that widely used mass rate method also is not applied to reality.Though mass flowmeter has many patterns, not outer direct-type and the derivation formula two big classes of dividing.Direct-type is not widely used owing to be subjected to principle and structural restriction.Inferential flowmeter all must be measured capacity earlier, takes advantage of tested density again, waits the density compensation of realizing temperature by densitometer, multiplier.Because densitometer structure and element characteristics restriction still can't be used under High Temperature High Pressure.This class flowmeter complicated integral structure of while, cost height, maintenance difficult.In the existing derivation formula, the volumeter of temperature compensation is after amplifying by the promotion of the working fluid in thermal detector lever, to drive hypodontia wheel or slip gear the density of temperature is carried out disposable indication compensation.Above-mentioned flowmeter is all handled the relation of temperature and density work linearity.In fact be exactly at normal temperatures and pressures, density and temperature, pressure are not to be linear relationship yet, do not have pressure compensation simultaneously.Therefore can not be widely used in reality equally.
The utility model just is to overcome above-mentioned shortcoming, on the basis of existing volumeter, improves structure and method, improvement temperature, the density compensation compute mode of pressure and the structure of rotor of temp measuring system.Reach the liquid quality under liquid quality under not only energy measurement normal temperature, the normal pressure but also energy measurement high temperature, the high pressure conditions, temperature and pressure is compensated simultaneously.Overcome the error that the nonlinear relationship of temperature, pressure and density is brought, to enlarge the scope of application.
The utility model is aspect temperature, the pressure compensation computing: be relation according to density of liquid, quality, volume three, and P.M/V and pressure balanced principle.Utilizing working fluid and measured medium simultaneously, is with a kind of liquid, and in equality of temperature, make peace density and volume of variable density inevitable is linear with depressing, the displacement that makes the computing slide bar changes according to the actual density of measured medium.
Aspect measuring room: adopt the measuring room of variable volume, volume-variation amount, the thermal detector volume of longitudinal deformation when making measuring room volume-variation amount and the computing of pressure-sensitive corrugated tube, the three becomes certain ratio.When the temperature of medium, when pressure changes, corresponding variation also takes place in the measuring room volume of being controlled by slide bar, thereby keeps the liquid quality of once metering constant.
The utility model structural principle is seen Fig. 1, and it is made of five parts.The temperature measuring mechanism of adjustable volume, it comprises: temperature probe ［ 2 ］, thermometric regulator ［ 3 ］, vent port ［ 8 ］; Slide bar type compensation operation mechanism, it comprises: pressure-sensitive corrugated tube ［ 9 ］, slide bar ［ 10 ］, slide block ［ 12 ］; The metering mechanism of variable volume, it comprises: female ［ 15 ］, son commentaries on classics ［ 17 ］, armature spindle ［ 18 ］, sub spring ［ 19 ］ that changes of changeing; Debugging mechanism, it comprises: adjusting knob ［ 14 ］, index dial ［ 13 ］, regulating shaft ［ 22 ］, connecting rod ［ 21 ］, pressure balance spring ［ 23 ］; And show that ［ 24 ］ five are partly formed.
This instrument is installed in the pipeline of quick control valve upstream.When medium temperature changed, by temperature probe ［ 2 ］, corresponding variation also took place in working fluid density.The working fluid variable density is converted into pressure and changes, by working fluid passage ［ 7 ］, be delivered to pressure-sensitive corrugated tube ［ 9 ］, promote slide bar ［ 10 ］ and drive slide block ［ 12 ］, until working fluid pressure and pressure medium balance for extremely.Son changes ［ 17 ］ under the effect of spring ［ 19 ］ power, follows slide block ［ 12 ］ and makes transversal displacement, makes metered volume that corresponding the variation be taken place, and carries out the density compensation of temperature.When pressure medium changed, pressure signal acted directly on the pressure-sensitive corrugated tube ［ 9 ］ by the pressure signal input channel ［ 11 ］ on the slide bar ［ 10 ］.Make son change ［ 17 ］ equally transversal displacement takes place, the volume of revising measuring room carries out the density compensation of pressure.
During computing, the interference when in order to overcome pressure medium slide block ［ 12 ］ and son being changeed ［ 17 ］ displacement has pressure compensation opening ［ 20 ］ and ［ 16 ］ in slide block ［ 12 ］ and female commentaries on classics ［ 15 ］.Mechanical force when changeing the elastic force of spring ［ 19 ］ power, pressure-sensitive corrugated tube ［ 9 ］ and slide block displacements such as ［ 12 ］ in order to overcome son is to the influence of computing, pressure balance spring ［ 23 ］ is housed in the instrument back cavity, makes working fluid be in a very little weighing apparatus that adds all the time and depress.
Working fluid in the thermal detector is and measured medium liquid of the same race, and volume-variation amount, the measuring room volume of longitudinal deformation when thermal detector volume, the computing of pressure-sensitive corrugated tube, and the three is proportional, and has the thermometric regulator to guarantee the accuracy of this ratio.Thermometric regulator ［ 3 ］ mainly contains regulates corrugated tube ［ 5 ］, adjusting screw(rod) compositions such as ［ 4 ］.When turn screw rod ［ 4 ］, make and regulate corrugated tube ［ 5 ］ longitudinal deformation and change, change the thermal detector internal capacity, to reach the purpose of aforementioned proportion accuracy.In order to make regulator ［ 3 ］ not influenced by pressure medium, on the regulator inner chamber, have pressure equalisation passage ［ 6 ］, link up and regulate corrugated tube ［ 5 ］ inside and measured medium.The quality signal is transported to display ［ 24 ］ by armature spindle ［ 18 ］.The display part is identical with general volumeter, can be mechanical type, electronic type, electromagnetic type etc.What indicate directly is exactly the cumulative amount of mass rate.
By dress or when changing another kind of medium, at first open inlet opening ［ 1 ］ and the vent port ［ 8 ］ of thermal detector, and the knob ［ 14 ］ of rotation debugger, make thermal detector drain air and be full of medium.Close vent port ［ 8 ］, measure the actual density (also can according to solid density) of medium again, regulate debugger, make the volume of measuring room conform with the requirement of density.Also adjusted simultaneously the seat of slide bar ［ 10 ］.Close inlet opening ［ 1 ］ again, make thermal detector form closed state, the medium in the thermal detector just is converted into working fluid.Debugger mainly contains adjusting knob ［ 14 ］, index dial ［ 13 ］, connecting rod ［ 21 ］ or gear, regulating shaft compositions such as ［ 22 ］.
The utlity model has following advantage: overcome the error that nonlinear relationship is brought between temperature, pressure and the density; Can carry out stepless compensation to density; Normal temperature, normal pressure can be adapted to and measurement under high temperature, the condition of high voltage can be adapted to again; Density to temperature and pressure can compensate simultaneously; Simplified indication mechanism; The generation error is easy to adjust; Compact conformation, applied widely, be easy to promote.The utility model can be widely used in fields such as chemical industry, liquid commodity circulation.
Embodiment 1: double star rotor displacement mass flowmeter
Its structure is seen Fig. 2, and Fig. 3 is the C-C cut-open view of Fig. 2.
Temperature measuring mechanism: see Fig. 2 a.Temperature probe ［ 2 ］ is to make with the strong metal of thermal conductivity, is placed on the front end of preceding branching block ［ 25 ］, and plays shunting action.Side at temperature probe ［ 2 ］ has closable inlet opening ［ 1 ］, can inject measured medium by inlet opening, or discharges unnecessary medium.Before being installed in, thermometric regulator ［ 3 ］ in the shunting block ［ 25 ］, adjusting corrugated tube ［ 5 ］, adjusting screw(rod) compositions such as ［ 4 ］ are arranged.Regulator ［ 3 ］ communicates with three pressure-sensitive wave ducts ［ 9 ］ and temperature probe ［ 2 ］ respectively by working fluid passage ［ 7 ］.Regulate corrugated tube ［ 5 ］ and then communicate with measured medium, make working fluid regulator ［ 3 ］ not be subjected to the interference of measured medium pressure, greatly reduced the retarded elasticity of adjusting corrugated tube ［ 5 ］ simultaneously again by pressure equalisation passage ［ 6 ］.When screw rod ［ 4 ］ precession or back-out, changed the longitudinal length of adjusting corrugated tube ［ 5 ］, thereby regulated the volume of whole thermal detector inside.Its adjustment by production unit according to when design instrument can survey the variable density scope and adjust.Have a closable vent port ［ 8 ］ in working fluid passage ［ 7 ］ top,, drain the air in the thermal detector so that when injecting measured medium.
The slide bar type arithmetical organ: by three pressure-sensitive corrugated tubes ［ 9 ］, three slide bars ［ 10 ］, master slider ［ 12 ］ constitute with sub-slide block ［ 26 ］.When the measured medium temperature variation, temperature becomes signal by temperature probe ［ 2 ］ input thermal detector.Identical variation takes place with measured medium density in working fluid density, is converted into the variation of working fluid pressure.Promote pressure-sensitive corrugated tube ［ 9 ］ longitudinal deformation, drive slide bar ［ 10 ］, master slider ［ 12 ］, the last son commentaries on classics of sub-slide block ［ 26 ］ ［ 17 ］ under the effect of spring ［ 19 ］ power, follow sub-slide block ［ 26 ］ and make transversal displacement, the measuring room volume is changed,, the density of temperature is compensated for extremely until working fluid pressure and measured medium pressure equilibrium.When measured medium pressure changed, pressure signal was delivered to pressure-sensitive corrugated tube ［ 9 ］ by the pressure signal input channel ［ 11 ］ on the slide bar ［ 10 ］, and just longitudinal deformation takes place for it, drove the density compensation that slide bar ［ 10 ］ carries out pressure.In order not to be subjected to the interference of measured medium pressure, on master slider ［ 12 ］, have pressure compensation opening ［ 20 ］ during computing.For the mechanical friction power influence that computing produces when acceptor does not change spring ［ 19 ］ power and master slider displacements such as ［ 12 ］, at the instrument back cavity pressure balance spring ［ 23 ］ is housed, make working fluid that the very little pressure that weighing apparatus is fixed be arranged all the time.
The measuring room part: the son that has the punching out of Second Mate's stalloy to form changes ［ 17 ］ and female star rotor A and B that changes ［ 15 ］ cooperation.The protecgulum of they and instrument, main body internal chamber wall, sub-slide block ［ 26 ］, constitute the measuring room of variable volume.Female change ［ 15 ］ are fixed on the two roots rotor axles ［ 18 ］, and son changes ［ 17 ］ and then can slide along axle.The sub commentaries on classics between ［ 17 ］ and the female commentaries on classics ［ 15 ］ is equipped with spring ［ 19 ］, so that son commentaries on classics ［ 17 ］ can be rotated and can be followed sub-slide block ［ 26 ］ and make transversal displacement.Be not subjected to the influence of measured medium pressure when making son change ［ 17 ］ displacement, change ［ 15 ］ one sides mother and have aperture ［ 16 ］.
Debugger mechanism: form by regulating shaft ［ 22 ］, adjusting knob ［ 14 ］, connecting rod ［ 21 ］ or gear, index dial ［ 13 ］ etc.When turn adjusting knob ［ 14 ］, drive master slider ［ 12 ］, sub-slide block ［ 26 ］, slide bar ［ 10 ］, make transversal displacement by connecting rod ［ 21 ］, pressure-sensitive corrugated tube ［ 9 ］ is also made longitudinal deformation simultaneously.Son changes ［ 17 ］ under the effect of spring ［ 19 ］ power, follows sub-slide block ［ 26 ］ and moves, when making measuring room conform with by dress or the desired volume of actual density when changing measured medium.
When measured medium is flowed through this instrument, at first make medium shunt through temperature probe ［ 2 ］, preceding branching block ［ 25 ］.Under the effect of pressure medium and kinetic energy, promote the A rotor and do the clockwise direction rotation, drive the B rotor simultaneously and do rotation counterclockwise.When A rotor revolving force did not also disappear, the B rotor under the effect of pressure and kinetic energy, was done rotation counterclockwise equally, also drives the A rotor simultaneously.Two rotors make them keep certain included angle by two Positioning Gears ［ 28 ］.Again through after branching block ［ 27 ］ flow out.Optionally, can respectively circle the do metering once by two rotors, also can respectively change for 1/3rd weeks and do metering once.The quality signal is exported by armature spindle ［ 18 ］.This double star rotor form had been done experiment, the material organic glass, and medium with water is as long as 0.4～0.2 meter water level can promote rotor.
Present embodiment mainly is applicable to measures medium above flow.
Embodiment 2: the scraper-type mass flowmeter
It is to improve to form on the basis of blade flowmeter.Structure is seen Fig. 4, and Fig. 5 is the A-A cut-open view of Fig. 4.
Temperature measurement fraction: temperature probe ［ 2 ］ is plate, is fixed on the protecgulum upper inside wall.Conducting strip ［ 32 ］ is arranged to remedy temperature probe and medium surface of contact deficiency in temperature probe ［ 2 ］ inboard.Thermometric regulator ［ 3 ］ is installed on the protecgulum, and structure and Fig. 2 a are roughly the same.Working fluid passage upper end has a closable vent port ［ 8 ］, lower end that an inlet opening ［ 1 ］ is arranged.
Slide bar type arithmetic section:, on slide bar, have pressure signal passage ［ 11 ］, master slider ［ 12 ］ and sub-slide block ［ 26 ］ to constitute by three pressure-sensitive corrugated tubes ［ 9 ］, three slide bars ［ 10 ］.In the middle of sub-slide block ［ 26 ］, spring ［ 19 ］ is housed, makes sub-slide block can follow master slider ［ 12 ］ and make transverse displacement, can rotate again simultaneously.Have pressure compensation opening ［ 20 ］ on master slider ［ 12 ］, at the instrument back cavity pressure balance spring ［ 23 ］ is housed, the mechanical friction power that produces when overcoming displacements such as pressure medium and slide block is to the influence of computing.Calculating process is identical with embodiment 1.
The measuring room part: the scraper plate that has four pairs of sons ［ 17 ］, female ［ 15 ］ to cooperate, with the measuring room of main body inner chamber, protecgulum, master slider ［ 12 ］ composition variable volume.Between son ［ 17 ］, female ［ 15 ］ scraper plate, spring ［ 33 ］ is housed, makes sub-scraper plate ［ 17 ］ make transversal displacement with sub-slide block ［ 26 ］.In a side of female scraper plate ［ 15 ］, have pressure compensation opening ［ 16 ］, be not subjected to the influence of pressure medium when making sub-scraper plate ［ 17 ］ displacement.Between Second Mate's scraper plate, there is right-and-left threaded connecting rod ［ 29 ］ to connect.In scraping plate body, spring ［ 31 ］ and steel ball ［ 30 ］ are housed, to reduce friction, reach the purpose that reduces pressure loss.Its measuring principle is identical with blade flowmeter.The quality signal is exported by armature spindle ［ 18 ］.
Debugging mechanism: wherein regulating shaft ［ 22 ］, regulate connecting rod ［ 21 ］, adjusting knob ［ 14 ］, index dial compositions such as ［ 13 ］.Debug process is identical with embodiment 1.
During present embodiment was suitable for, the liquid quality of low discharge was measured.
Claims (6)
1, a kind of mass rate of measuring liquid, the positive displacement mass flowmeter that the density of the density of fluid temperature and pressure is compensated simultaneously, it has temperature probe [2], the temperature measuring mechanism that thermometric regulator [3] etc. constitute, pressure-sensitive corrugated tube [9] one ends are fixed in the slide bar chamber, the other end is connected with slide bar [10], slide bar [10] rear portion is fixed on slide block [12] and goes up formation compensation operation mechanism, temperature probe [2] communicates with pressure-sensitive corrugated tube [9] inside, rotor, slide blocks [12] etc. constitute measuring room, debugging mechanism, display [24] combines, and it is characterized in that:
A temperature probe [2] has the thermal detector [3] of its volume size of scalable;
The computing slide bar that b pressure-sensitive corrugated tube [9] outside communicates with measured medium;
C mainly cooperates the rotor of laterally slippage, the measuring room that slide block [12] constitutes variable volume by son [17] female [15];
The connecting rod [21] of d debugging mechanism is connected with slide block [12], the horizontal seat of moving slider [12], slide bar [10] and sub-commentaries on classics [17] simultaneously during rotary regulating lever [22].
2, positive displacement mass flowmeter according to claim 1 is characterized in that the adjusting screw(rod) (4) that has to be connected with adjusting corrugated tube (5) in the measuring and adjusting device (3).
3, positive displacement mass flowmeter according to claim 1, the working fluid that it is characterized in that temperature measuring mechanism is the liquid identical with measured medium.
4, positive displacement mass flowmeter according to claim 1, the volume-variation amount three of the volume-variation amount of longitudinal deformation, measuring room is proportional when it is characterized in that volume, pressure-sensitive corrugated tube (9) computing of temperature measuring mechanism.
5, positive displacement mass flowmeter according to claim 1 is characterized in that having on the slide bar (10) the pressure signal input channel (11) that a pressure-sensitive corrugated tube (9) outside communicates with the main body inner chamber.
6, positive displacement mass flowmeter according to claim 1 is characterized in that the rotor that son (17) female (15) cooperates is scraper plate or tri-star shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214686 CN87214686U (en) | 1987-10-23 | 1987-10-23 | Volumetric mass flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214686 CN87214686U (en) | 1987-10-23 | 1987-10-23 | Volumetric mass flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87214686U true CN87214686U (en) | 1988-08-03 |
Family
ID=4828950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87214686 Withdrawn CN87214686U (en) | 1987-10-23 | 1987-10-23 | Volumetric mass flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87214686U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376878C (en) * | 2006-05-26 | 2008-03-26 | 重庆前卫克罗姆表业有限责任公司 | Method and apparatus for automatically detecting metering-error of gas meter |
| CN100383492C (en) * | 2005-07-18 | 2008-04-23 | 陈冠一 | Variable volume meter body |
| CN100427891C (en) * | 2004-08-31 | 2008-10-22 | 王舒娴 | Flow meter of section metering |
| CN101796378B (en) * | 2007-06-27 | 2013-06-05 | Mks仪器公司 | Mass flow verifiers capable of providing different volumes, and related methods |
| CN105136252A (en) * | 2015-08-19 | 2015-12-09 | 桂林电子科技大学 | Double-chamber gas metering device with metering correction function |
| CN108775942A (en) * | 2018-08-13 | 2018-11-09 | 合肥利都自动化仪表有限公司 | A kind of holder for measuring the blade flowmeter of high-temperature medium |
-
1987
- 1987-10-23 CN CN 87214686 patent/CN87214686U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427891C (en) * | 2004-08-31 | 2008-10-22 | 王舒娴 | Flow meter of section metering |
| CN100383492C (en) * | 2005-07-18 | 2008-04-23 | 陈冠一 | Variable volume meter body |
| CN100376878C (en) * | 2006-05-26 | 2008-03-26 | 重庆前卫克罗姆表业有限责任公司 | Method and apparatus for automatically detecting metering-error of gas meter |
| CN101796378B (en) * | 2007-06-27 | 2013-06-05 | Mks仪器公司 | Mass flow verifiers capable of providing different volumes, and related methods |
| CN105136252A (en) * | 2015-08-19 | 2015-12-09 | 桂林电子科技大学 | Double-chamber gas metering device with metering correction function |
| CN105136252B (en) * | 2015-08-19 | 2018-02-16 | 桂林电子科技大学 | A kind of double Air-chamber type gas-metering devices with metering amendment |
| CN108775942A (en) * | 2018-08-13 | 2018-11-09 | 合肥利都自动化仪表有限公司 | A kind of holder for measuring the blade flowmeter of high-temperature medium |
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