EP4078105A1 - Verfahren zur herstellung einer messrohranordnung für ein coriolis-durchflussmessgerät - Google Patents
Verfahren zur herstellung einer messrohranordnung für ein coriolis-durchflussmessgerätInfo
- Publication number
- EP4078105A1 EP4078105A1 EP20817307.0A EP20817307A EP4078105A1 EP 4078105 A1 EP4078105 A1 EP 4078105A1 EP 20817307 A EP20817307 A EP 20817307A EP 4078105 A1 EP4078105 A1 EP 4078105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- core
- measuring tube
- arrangement
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 title abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000002844 melting Methods 0.000 claims abstract description 38
- 230000008018 melting Effects 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000001746 injection moulding Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 8
- 238000004382 potting Methods 0.000 description 8
- 230000009969 flowable effect Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229920000491 Polyphenylsulfone Polymers 0.000 description 2
- 239000004954 Polyphthalamide Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920006260 polyaryletherketone Polymers 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 229920006375 polyphtalamide Polymers 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- RRXGIIMOBNNXDK-UHFFFAOYSA-N [Mg].[Sn] Chemical compound [Mg].[Sn] RRXGIIMOBNNXDK-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- GZCWPZJOEIAXRU-UHFFFAOYSA-N tin zinc Chemical compound [Zn].[Sn] GZCWPZJOEIAXRU-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8404—Coriolis or gyroscopic mass flowmeters details of flowmeter manufacturing methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
- G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
- G01F1/8472—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
- G01F1/8477—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane with multiple measuring conduits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/006—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus characterised by the use of a particular material, e.g. anti-corrosive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
Definitions
- the invention relates to a method for producing a measuring tube arrangement of a Coriolis flow measuring device, a Coriolis flow measuring device and a use of a core melting process for producing a measuring tube arrangement of a Coriolis flow measuring device.
- Coriolis flow measuring devices have at least one or more oscillatable measuring tubes, which can be made to oscillate by means of a vibration exciter. These vibrations are transmitted over the length of the pipe and are varied by the type of flowable medium in the measuring pipe and its flow rate.
- a vibration sensor or, in particular, two vibration sensors that are spaced apart from one another can record the varied vibrations in the form of a measurement signal or a plurality of measurement signals at another point on the measuring tube.
- An evaluation unit can then determine the mass flow rate, the viscosity and / or the density of the medium from the measurement signal or signals.
- Coriolis flowmeters usually have metallic measuring tubes. So far, there are only a few Coriolis flowmeters with non-metallic measuring tubes.
- WO 2011/099989 A1 teaches a method for producing a monolithically designed measuring tube arrangement of a Coriolis flowmeter with curved measuring tubes, the measuring tube body of the respective measuring tubes first being solidly formed from a polymer and the channel for guiding a flowable medium then being incorporated in an exciting manner.
- a manufacturing process is very complex to manufacture and costly, which reduces its attractiveness for single-use applications.
- the invention is based on the object of providing an alternative method for producing a measuring tube arrangement of a Coriolis flow measuring device, with which measuring tubes can be produced which are suitable for flow measurements based on the Coriolis principle.
- the invention is also based on the object of providing a Coriolis flow measuring device with a measuring tube arrangement made of plastic, in which the respective inner contour and outer contour of the measuring tubes have reproducible dimensions.
- the object is achieved by the method according to claim 1, the Coriolis flow measuring device according to claim 10 and the use according to claim 11.
- the method according to the invention for producing a measuring tube arrangement for a Coriolis flow measuring device comprises the method steps:
- the core assembly comprises at least one core, the core comprising a core body comprising a first material
- the core assembly Separation of the mold cavity and the core assembly from the measuring tube assembly, the core assembly being separated by melting the at least one core of the core assembly at a melting temperature which is below the melting temperature of the second material and above the melting temperature of the first material.
- the cavity is preferably filled by means of an original molding process, in particular by means of injection molding.
- a low-melting metal alloy in particular a bismuth, tin, zinc and / or magnesium alloy, and preferably a tin-bismuth, tin-zinc, tin-lead and / or tin-magnesium alloy, is preferably suitable as the first material -Alloy.
- the first material -Alloy is preferably suitable as the first material -Alloy.
- Material can also have a filler, which has a higher melting temperature than the second material, in order to reduce the material requirement of the first material.
- the filler is removed from the measuring tube arrangement when the liquefied first material is poured out.
- a filler includes sand and / or glass.
- a polyamide (PA), polyphthalamide (PPA), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyaryletherketone (PAEK) is preferably suitable as the second material, Polyphenylsulfone (PPSU), polyethersulfone (PESU), polysulfone (PSU), polyarylamide (PARA).
- the melting can take place, for example, in a molten bath and / or by means of inductive melting.
- Such a method makes it possible to realize complex shapes for the measuring tube arrangement which, for example, have undercuts and thus cannot be made using conventional original shapes, in particular by means of injection molding.
- Such molded parts cannot be demolded.
- the external shape of the measuring tube arrangement is given by the design of the mold cavity.
- the mold cavity can be designed in several parts, which allows the production of measuring tube arrangements with measuring tubes with a partially or completely circular, square or oval cross section.
- Such a measuring tube arrangement is particularly suitable as a single-use flow measuring device for applications in the medical field.
- the vibration exciter and the vibration sensors are arranged on a carrier body in or on which the measuring tube arrangement is arranged in a mechanically separable manner.
- the at least one core has a bend.
- measuring tube arrangements for Coriolis flowmeters known which have curved measuring tubes.
- a usually straight metallic starting pipe is bent by introducing a bending force that acts at least in sections from the outside on the starting pipe.
- Such a method is not suitable for measuring tubes made of plastic, which would also be suitable for use in a Coriolis flow meter.
- Plastic measuring tubes, which can be easily deformed usually have a low quality factor and / or a low natural frequency.
- plastic measuring tubes, which would be suitable for use in a Coriolis flow meter are very hard and cannot be bent.
- curved measuring tubes can be produced which are formed from a plastic that has a high
- a core arrangement with at least one core having an arc is used for the injection molding process.
- the measuring tube thus obtained, or the measuring tube arrangement thus obtained, cannot be removed from the mold. Demolding takes place by melting the core assembly.
- the core has at least two areas which run parallel to one another, the bend lying between two of the at least two areas.
- the mold cavity has at least one receptacle in which a magnetic device is inserted, the magnetic device being overmolded with the second material when the cavity is filled, so that the magnetic device is positively attached in the measuring tube body formed.
- Vibration exciters and vibration sensors each comprise at least one magnetic device, which has magnets - which can also often be designed as magnetic cups - and comprises at least one coil.
- the magnetic device is at least partially encapsulated by the second material and thus fixed to the measuring tube arrangement in a form-fitting manner. Subsequent attachment and fixation of the magnets is therefore no longer necessary. This not only results in more reproducible measuring tube arrangements, but also leaner manufacturing processes.
- the mold cavity has at least one bulge for forming a recess in the measuring tube body formed, the recess being set up to accommodate at least one magnetic device.
- bulges can also be provided in the mold cavity, which leave depressions in the measuring tube that are designed to accommodate magnets.
- the magnets are glued into the receptacles. A simple positioning and reproducible attachment of the magnets to the measuring tube device can thus be achieved. This is particularly important because, with single-use measuring tube arrangements, there is no need for complicated adjustment and this can only be avoided if the measuring tube arrangement can be produced as reproducibly as possible.
- the core arrangement comprises exactly two cores, wherein the two cores and the mold cavity form a first cavity and a second cavity, for forming two measuring tubes, the mold cavity forming at least one third cavity which connects the first cavity and the second cavity, a coupler element body being formed when the third cavity is filled , which connects the two measuring tubes with each other.
- Measuring tube arrangements of Coriolis flowmeters with at least two measuring tubes generally have coupling elements which connect the individual measuring tubes to one another and thus form a single oscillator from the measuring tube arrangement. These coupling elements are used in conventional Coriolis
- a second cavity which serves as a casting mold for the coupler element body. This saves the subsequent attachment and fixing of the coupler elements to the measuring tube arrangement. This is because a coupler element body is formed during injection molding, which connects the measuring tubes to one another. In this case, the coupler element body is monolithically connected to the measuring tube arrangement. Furthermore, it is thus ensured that the coupling quality of the coupler elements and thus also the
- Vibration behavior of the individual measuring tube arrangements can be produced in a reproducible manner.
- One embodiment provides that at least one first support body is arranged in the third cavity, which is designed to increase the mechanical strength of the coupler element body, the first support body having a third material with a third
- first support body into the coupler element body, in particular to cast it with it.
- the first support body can, however, also take over the function of the coupler element.
- the casting compound extending into the third cavity serves to ensure that the support body is connected to the measuring tube arrangement in a form-fitting manner.
- the core arrangement comprises exactly two cores, wherein the two cores and the mold cavity form a first cavity and a second cavity to form two measuring tubes, the mold cavity and the cores forming a further fourth cavity, the fourth cavity being cut twice by the two cores, with the fourth cavity forms a decoupling body which connects the two measuring tubes to one another.
- the replaceable part of the Coriolis flowmeter can be attached in a reproducible manner.
- the oscillation behavior of the measuring tubes when adjusting the measuring tube arrangement must correspond to the oscillation behavior of the measuring tubes after they have been installed in the customer's system.
- the replaceable part is not only arranged in a mechanically fixed manner on the carrier body, but can also be mechanically decoupled as far as possible from the line system for guiding the flowable medium.
- the measuring tube arrangement with a decoupling body which has mounting surfaces for reproducible attachment and fixing of the measuring tube arrangement in a carrier arrangement and which is designed to reduce external influences on the flow measurement. Furthermore, the decoupling body serves to reduce micro-friction at the interfaces with the carrier body.
- a second support body is arranged in the fourth cavity, which is designed to increase the mechanical strength of the decoupling body, the second support body having a fourth material with a fourth melting temperature that is greater than the melting temperature of the first material .
- a further development of the above embodiment provides a second support body in the decoupling body to increase the mechanical strength.
- the second support body replaces the decoupling body, or the decoupling body corresponds to the second support body.
- the second support body replaces the decoupling body, or the decoupling body corresponds to the second support body.
- the Coriolis flow meter according to the invention comprises:
- At least one vibration exciter which is set up to excite the measuring tube arrangement to vibrate
- At least one vibration sensor which is set up to detect the deflection of the vibrations of the measuring tube arrangement; and is characterized in that the measuring tube arrangement is produced by means of the method according to the invention.
- a core melt-out method is used for an original form, in particular for injection molding to produce a measuring tube arrangement for a Coriolis flow measuring device.
- the lost core process is mainly used in the automotive industry. It enables every imaginable part contour, such as multiple bent pipes. This means that plastic parts that cannot be demolded can also be produced using injection molding processes. The inner surfaces of the manufactured parts can be structured in a targeted manner. The invention is explained in more detail with reference to the following figures. It shows:
- FIG. 3 shows a detail of a core arrangement inserted into the mold cavity; 4: a further embodiment of the core arrangement according to the invention with a support body;
- the core arrangement 1 shows an embodiment of a core arrangement 1 which, together with the mold cavity, serves to form a cavity or a hollow space which defines the shape and surface structure of the finished measuring tube arrangement.
- the core arrangement 1 has two cores 4.1, 4.2, which are connected to one another via a connecting body 29.
- the connecting body serves to arrange and fix the core arrangement 1 in a predetermined position in the mold cavity in a manner that is as easy to assemble as possible.
- the connecting body 19 can be monolithically connected to the core arrangement 1, or attached in a form-fitting and / or force-fitting manner.
- Both cores 4.1, 4.2 each have two areas 12.1, 12.2 in which the respective longitudinal axes of the core run parallel to one another, and one
- the component manufactured by means of injection molding thus also has an arc.
- the channel for guiding the flowable medium in the measuring tube is essentially U-shaped.
- the core body 5 has a first material 9 which has a lower melting temperature than the melting temperature of the second material from which the measuring tube body is formed.
- the core arrangement 1 has two mutually perpendicular mirror planes which each divide the core arrangement 1 into two parts. A first mirror plane runs between the two cores.
- the second mirror plane intersects the two cores 4.1, 4.2 in the arc area, the longitudinal axes of the two areas 12.1, 12.2 being equidistant from the second mirror plane.
- the cores 4.1, 4.2 are partially cylindrical or have a circular cross-sectional area.
- the cores 4.1, 4.2 can also be designed in several parts, i.e. consist of several individual parts which, when plugged together, form the respective core 4.1, 4.2.
- 2 shows a longitudinal section through an embodiment of the mold cavity 2 into which the core arrangement is inserted and which, together with the core arrangement, forms a cavity for potting with flowable plastic and forming a measuring tube arrangement.
- the mold cavity can be designed in several parts.
- the mold cavity 2 comprises a channel which has two areas 13.1, 13.2 which are each formed parallel to one another and which are connected to one another by means of an arch.
- receptacles 14 for magnets of the magnetic device 15 in the mold cavity 2 are arranged in the two areas 13.1, 13.2.
- the magnets are attached in the receptacle in such a way that they are positively connected to the respective measuring tube bodies when the measuring tube arrangement is formed.
- the magnets of the magnetic device 15 are components of the vibration sensors and the vibration exciter.
- the mold cavity can have a receptacle for the connecting body of the core assembly, which is used to fix the core assembly in a predetermined position and a reproducible cavity between the mold cavity 2 and FIG. 3 shows a section of the core assembly 1 from FIG. 1, arranged in the Mold cavity 2 of FIG. 2.
- a cavity 3 is formed which is filled with the potting compound, in particular the liquid plastic, in the later course of the process and defines the shape of the measuring tube arrangement.
- the core arrangement 1 and the mold cavity 2 form a first cavity 19 and a second cavity 20.
- the measuring tube body is formed in the first cavity 19 and in the second cavity 20.
- Six first support bodies 23 are attached to the core arrangement 1, each of which forms a third cavity 21 with the mold cavity 2. Three of the first support body 23 are in
- the inlet section and three of the first support bodies 23 are attached in the outlet section of the core arrangement 1.
- the first support bodies 23 connect the cores to one another in the respective sections.
- the first support body 23 has a fourth material 28, which has a melting temperature that is higher than the melting temperature of the first material 9 of the core body 5 of the core assembly 1 After filling the third cavity 21 with a potting compound and curing the potting compound forms in the third Cavity 21 from a coupler element with a coupler element body.
- a fourth cavity 25 is formed between the second support body 27 and the mold cavity 2, which when filled forms a decoupling body.
- FIG. 4 shows a further embodiment of the core arrangement 1, which has at least all of the essential features of the embodiment shown in FIG. 1.
- a second support body 27 is attached to the core arrangement 1. The second
- Support body 27 comprises a fourth material 28, which has a higher melting temperature than the melting temperature of the first material 9.
- the second support body 27 serves to connect the two measuring tubes of the measuring tube arrangement to one another and thus to couple them mechanically from the environment.
- the second support body 27 connects the respective inlet sections of the cores to one another and to the outlet sections of the cores.
- FIG. 5 shows an overmolded and demolded core arrangement 1 from FIG. 4.
- the liquid injected plastic forms the measuring tube arrangement 8 with the coupler element body 22.
- the mold cavity has been removed.
- the measuring tube arrangement 8 has two measuring tubes 7.1, 7.2, which are each formed from a second material 10.
- the melting temperature of the second material 10 is higher than the melting temperature of the first material.
- the first support body 23 is integrated in the coupler element body 22 and is at least partially enclosed by the hardened potting compound.
- the measuring tube arrangement 8 has a decoupling body 26, which encompasses the second support body.
- the measuring tube arrangement 8 comprises a measuring tube body 6.
- the measuring tube body 6 has Recordings for the magnetic device.
- the two measuring tubes are connected to one another via two coupling elements 22, which are arranged in the inlet and outlet areas.
- the coupler elements 22 take the shape of the third cavity. s
- FIG. 7 shows the measuring tube arrangement 8 of FIG. 6 with attached magnetic device 15.
- the magnets of the magnetic device are arranged in the receptacles and are connected to the measuring tube body in a material and / or form-fitting manner.
- the embodiment of a Coriolis flow meter according to the invention shown in FIG. 8 comprises a measuring tube arrangement produced by means of the method according to the invention, which comprises two parallel curved measuring tubes 110a, 110b, which extend between an inlet-side collector 120a and an outlet-side collector 120b, and with these are firmly connected.
- a solid support tube or a support body 124 extends between the collectors 120a, 120b and is fixedly connected to both collectors, as a result of which the collectors 120a, 120b are rigidly coupled to one another.
- the carrier tube 124 has openings 125a, 125b on its upper side, through which the measuring tubes 110a, 110b are removed from the collectors
- the measuring tubes 110a, 110b are each connected on the inlet side and outlet side with two coupler elements 132a, 134a, 132b, 134b, which are produced by the method according to the invention, the coupler elements each having a through hole 30 between the measuring tubes, which serves for the stiffness in Y - To reduce the direction of the geometric center in the second area between the two measuring tubes.
- the coupler elements 132a, 132b, 134a, 134b define vibration nodes for the measuring tubes.
- the measuring tubes 110a, 11ob can oscillate freely between the inner coupler elements 132a, 132b, so that the oscillation properties of the oscillator formed by the measuring tubes 110a, 110b, in particular the natural frequencies of oscillation modes of the oscillator, are significantly determined by the position of the inner coupler elements.
- the measuring tubes are made of or made of plastic.
- an exciter arrangement 140 is provided, for example an inductive exciter arrangement which, for example, has a
- a first sensor arrangement 142a and a second sensor arrangement 142b are provided in the longitudinal direction symmetrically to the exciter arrangement 140, each of which is designed as an inductive arrangement with a plunger coil on one pipe and a plunger on the other pipe. Details are known to the person skilled in the art and do not need to be explained in more detail here.
- the collectors 120a, 120b have end flanges 122a, 122b by means of which the measuring device can be installed in a pipeline.
- the measuring tubes 110a, 110b are each with two on the inlet side and outlet side
- Coupler elements 132a, 134a, 132b, 134b connected, the coupler elements each having a hole 30 between the measuring tubes.
- Coupler element 140 Vibration exciter 142a Vibration sensor 142b Vibration sensor 146 Voice opening
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019134609.6A DE102019134609A1 (de) | 2019-12-16 | 2019-12-16 | Verfahren zur Herstellung einer Messrohranordnung eines Coriolis- Durchflussmessgerätes |
PCT/EP2020/084130 WO2021121975A1 (de) | 2019-12-16 | 2020-12-01 | Verfahren zur herstellung einer messrohranordnung für ein coriolis-durchflussmessgerät |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4078105A1 true EP4078105A1 (de) | 2022-10-26 |
Family
ID=73695031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20817307.0A Pending EP4078105A1 (de) | 2019-12-16 | 2020-12-01 | Verfahren zur herstellung einer messrohranordnung für ein coriolis-durchflussmessgerät |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230012765A1 (de) |
EP (1) | EP4078105A1 (de) |
CN (1) | CN114829885A (de) |
DE (1) | DE102019134609A1 (de) |
WO (1) | WO2021121975A1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6450042B1 (en) * | 2000-03-02 | 2002-09-17 | Micro Motion, Inc. | Apparatus for and a method of fabricating a coriolis flowmeter formed primarily of plastic |
DE10347878A1 (de) * | 2003-10-10 | 2005-05-04 | Abb Patent Gmbh | Magnetisch-induktives Messgerät für strömende Stoffe und Verfahren zu dessen Herstellung |
EP1807681B1 (de) | 2004-11-04 | 2016-09-07 | Endress+Hauser Flowtec AG | Messaufnehmer vom vibrationstyp |
WO2011099989A1 (en) | 2010-02-12 | 2011-08-18 | Malema Engineering Corporation | Methods of manufacturing and temperature calibrating a coriolis mass flow rate sensor |
DE102014115871A1 (de) * | 2014-10-31 | 2016-05-04 | Endress+Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät und Verfahren zur Herstellung eines Messrohres |
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2019
- 2019-12-16 DE DE102019134609.6A patent/DE102019134609A1/de active Pending
-
2020
- 2020-12-01 EP EP20817307.0A patent/EP4078105A1/de active Pending
- 2020-12-01 WO PCT/EP2020/084130 patent/WO2021121975A1/de unknown
- 2020-12-01 US US17/757,297 patent/US20230012765A1/en active Pending
- 2020-12-01 CN CN202080084661.0A patent/CN114829885A/zh active Pending
Also Published As
Publication number | Publication date |
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WO2021121975A1 (de) | 2021-06-24 |
CN114829885A (zh) | 2022-07-29 |
DE102019134609A1 (de) | 2021-06-17 |
US20230012765A1 (en) | 2023-01-19 |
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