DE102019134605A1 - Measuring tube arrangement and carrier unit of a Coriolis flow meter - Google Patents

Abstract

The invention relates to a measuring tube arrangement (4) of a measuring device (2) for detecting a mass flow, comprising: two straight measuring tubes (3) running parallel to one another, the measuring tubes (3) each having an inlet area, an outlet area and one between the inlet area and the outlet area arranged measuring section, wherein the measuring tubes (3) in the inlet area and in the outlet area have mounting surfaces for the mechanically detachable installation of the measuring tube arrangement (4) in a carrier unit (16) in a defined position, - a coupler arrangement (1), the coupler arrangement (1 ) has at least two coupler elements (7), at least one coupler element (7) being arranged in the inlet area of the respective measuring tubes (3), at least one coupler element (7) being arranged in the outlet area of the respective measuring tubes (3); - two magnet arrangements (9) ), which are arranged in the measuring section of the respective measuring tubes (3), with exactly one measuring tube (3) Magnet arrangement (9) is arranged, the magnet arrangements (9) each having at least two magnets (10) which are arranged one after the other in the direction of flow of the flowable medium.

Description

The invention relates to a measuring tube arrangement, a measuring tube system and a carrier unit of a measuring device and a measuring device for detecting a mass flow, a viscosity, a density and / or a variable derived therefrom of a flowable medium.

Field devices in process measurement technology with a sensor of the vibration type and, in particular, Coriolis flow meters have been known for many years. The basic structure of such a measuring device is, for example, in the EP 1 807 681 A1 described, reference being made in full to the structure of a generic field device within the scope of the present invention in this document.

Typically, 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 several 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 with exchangeable, disposable measuring tube assemblies are known. For example, in the WO 2011/099989 A1 a method for the production of a monolithic measuring tube arrangement of a Coriolis flow meter with curved measuring tubes is taught, the measuring tube body of the respective measuring tubes first being solidly formed from a polymer and the channel for guiding the flowable medium then being incorporated in an exciting manner. The WO 2011/099989 A1 teaches - just like the US 10,209,113 B2 - A connecting body which is set up to receive and support an exchangeable measuring tube arrangement comprising thin-walled plastic tubes.

The invention is based on the object of providing an alternative disposable measuring tube concept for Coriolis flow measuring devices.

The object is achieved by the measuring tube arrangement according to claim 1, the measuring tube system according to claim 8, the carrier unit according to claim 11 and the measuring device according to claim 16.

• - zwei insbesondere zueinander parallel verlaufende, gerade Messrohre zum Führen des fließfähigen Mediums, wobei die Messrohre jeweils einen Einlaufbereich, einen Auslaufbereich und einen zwischen Einlaufbereich und Auslaufbereich angeordneten Messabschnitt aufweisen, wobei die Messrohre im Einlaufbereich und im Auslaufbereich Montageflächen aufweisen, zum mechanisch lösbaren Einbau der Messrohranordnung in eine Trägereinheit in einer, insbesondere durch die Montageflächen definierte Position,
• - eine Koppleranordnung zum mechanischen Koppeln der beiden Messrohre, wobei die Koppleranordnung mindestens zwei Kopplerelemente aufweist, wobei mindestens ein Kopplerelement im Einlaufbereich der jeweiligen Messrohre angeordnet ist, wobei mindestens ein Kopplerelement im Auslaufbereich der jeweiligen Messrohre angeordnet ist;
• - zwei Magnetanordnungen, welche im Messabschnitt der jeweiligen Messrohre angeordnet sind, wobei an einem Messrohr genau eine Magnetanordnung angeordnet ist, wobei die Magnetanordnungen jeweils mindestens zwei Magnete aufweisen, welche in Fließrichtung des fließfähigen Mediums nacheinander angeordnet sind.

The inventive measuring tube arrangement of a measuring device for detecting a mass flow rate, a viscosity, a density and / or a variable derived therefrom of a flowable medium comprises:

• - Two straight measuring tubes running parallel to each other for guiding the flowable medium, the measuring tubes each having an inlet area, an outlet area and a measuring section arranged between the inlet area and the outlet area, the measuring tubes having mounting surfaces in the inlet area and in the outlet area for the mechanically detachable installation of the Measuring tube arrangement in a carrier unit in a position, in particular defined by the mounting surfaces,
• a coupler arrangement for mechanically coupling the two measuring tubes, the coupler arrangement having at least two coupler elements, at least one coupler element being arranged in the inlet area of the respective measuring tubes, at least one coupling element being arranged in the outlet area of the respective measuring tubes;
• - Two magnet arrangements which are arranged in the measuring section of the respective measuring tubes, with exactly one magnet arrangement being arranged on a measuring tube, the magnet arrangements each having at least two magnets which are arranged one after the other in the direction of flow of the flowable medium.

The advantage of the measuring tube arrangement according to the invention is that the measuring tube arrangement which is in contact with the medium can be mechanically detached from the carrier unit and is thus exchangeable.

The bending of measuring tubes, especially with measuring tube bodies made of ceramic, glass and plastic, can only be implemented with great effort and is therefore cost-intensive and disadvantageous for disposable concepts. It is therefore advantageous if the measuring tube arrangement comprises two straight measuring tubes.

The measuring device for detecting a mass flow, a viscosity, a density and / or a variable derived therefrom of a flowable medium comprises a Coriolis flow measuring device which is based on the Coriolis effect.

It is particularly advantageous if at least two coupler elements are attached in the inlet area and at least two coupler elements are attached in the outlet area. This results in a better demarcation of the oscillation of the measuring tubes from the environment.

Advantageous refinements of the invention are the subject of the subclaims.

One embodiment provides that the measuring tubes each have a longitudinal plane which divides the measuring tube into two sides,
whereby a reference line connecting the two measuring tubes intersects the two longitudinal planes perpendicularly,
wherein the magnetic devices are arranged on the opposite sides of the measuring tubes.

Arranging the magnetic devices on the opposite sides enables the vibration exciter and vibration sensors to be separated so that a first component, namely the magnetic device, can be arranged on the measuring tube and a second component, namely the coil device on the carrier unit, can be attached separately from the measuring tube. Measuring tubes are known in which a magnetic device is arranged on one of the two facing sides of the measuring tubes. For such a measuring tube it is necessary to arrange the coil device either in the space between the two measuring tubes or on the opposite side of the measuring tube.

The arrangement of the coil device between the two measuring tubes is particularly disadvantageous for insertion into the receptacle of the carrier unit, since steric hindrances between the measuring tubes and the coil device can occur.

Arranging the coil device on the measuring tube has the disadvantage that the coil device has to be electrically connected to the measuring and / or operating circuit after the measuring tube arrangement has been arranged in the carrier unit. Either via a connection body for establishing an electrical connection between the measuring and / or operating circuit and the coil device or via a wireless connection. Both solutions can only be implemented with great effort for exchangeable measuring tube arrangements and are therefore disadvantageous.

The magnets are preferably glued, clamped or soldered onto the measuring tubes.

One embodiment provides that the measuring tubes each have an in particular metallic measuring tube body with a wall thickness of less than 1 millimeter, in particular less than 0.7 millimeter and preferably less than 0.25 millimeter.

The measuring tube arrangement is usually welded to the carrier unit. For this, the measuring tubes of the measuring tube arrangement must have a minimum thickness. Because the measuring tube arrangement according to the invention is mechanically detachably connected to the carrier unit via mounting surfaces, the minimum thickness does not have to be adhered to either. Measuring tube bodies with a wall thickness of less than 1 millimeter, in particular less than 0.7 millimeter and preferably less than 0.25 millimeter, can thus be implemented.

One embodiment provides that the measuring tubes each have a measuring tube body which is made of steel, glass, ceramic and / or plastic, in particular of polyetheretherketones (PEEK), polyaryletherketones (PAEK), polyphenylsulfones (PPSU), polyether sulfones (PESU), Polysulfones (PSU), polyarylamides (PARA).

There is a demand for measuring devices with disposable measuring tubes or disposable measuring tube arrangements for biopharmaceutical applications. For this, the materials that come into contact with the medium must be biocompatible and gamma-sterilizable. It is therefore particularly advantageous if the measuring tube is made from one of the above-mentioned materials, since these meet the biopharmaceutical requirements. The plastics mentioned are also suitable as a casting compound in an injection molding process for producing the connecting body.

One embodiment provides that the coupler arrangement has exactly six couplers,
whereby three coupler elements are arranged in the inlet area of the two measuring tubes and three coupler elements are arranged in the outlet area of the two measuring tubes.

The positions of the individual coupler elements are chosen so that as little vibration energy as possible is lost. The best positions are designed using numerical simulation.

To optimize the measurement signal, the coupler elements can be provided with windows, i.e. an opening extending from a first end face to a second end face, whereby a frequency separation of a lateral useful frequency and the same frequency takes place perpendicular to it.

In addition, in the case of coupler elements each having at least one through hole, the modal flexural rigidity in the Y direction is essentially smaller than the torsional rigidity.

The material thickness of the coupler element is another parameter to influence this. According to an advantageous embodiment, the material thickness of a coupler element, in particular a coupler element with a through hole, corresponds to N times the wall thickness of the measuring tube, whereby it preferably applies that 1 N 4, where N is a real number, the hole being of one first end face extends to the second end face of the coupler element.

One embodiment provides that the measuring tubes are connected to one another via a connecting body,
wherein the connecting body is arranged between the coupler arrangement and the inlet,
wherein the connecting body has the mounting surfaces.

If the measuring tube arrangement is mechanically fixed to the carrier unit via the connecting body, the fixing device does not depend on the nominal width of the respective measuring tubes. In this way, measuring tube arrangements with different nominal widths can be arranged and fixed in the carrier unit. Furthermore, when contacting the measuring tubes, the fixing device could lead to mechanical stresses, which would change the oscillating properties of the measuring tubes. The calibration factors determined in a calibration carried out beforehand would therefore be incorrect. Fixing the measuring tube arrangement via a connecting body has the advantage that the oscillation behavior of a fixed measuring tube arrangement can be reproduced for varying carrier units.

In a further advantageous embodiment, the measuring tube arrangement has two connecting bodies, the first connecting body being arranged between the coupler arrangement and inlet and the second connecting body being arranged between the coupler arrangement and the outlet, and both connecting bodies having a mounting surface.

One embodiment provides that the mounting surfaces are located on the measuring tubes.

• - eine Messrohranordnung, insbesondere die erfindungsgemäße Messrohranordnung; und
• - ein Schlauch- und/oder Kunststoffrohrsystem, vorzugsweise zur Durchflussmessung bei automatisierten industriellen oder labortechnischen Anlagen, wobei die Messrohranordnung an das Schlauch- und/oder Kunststoffrohrsystem angeschlossen ist und dazu eingerichtet ist die Durchflussgeschwindigkeit und/oder den Volumendurchfluss und/oder den Massedurchfluss des fließfähigen Mediums zu messen.

The measuring tube system according to the invention comprises:

• - A measuring tube arrangement, in particular the measuring tube arrangement according to the invention; and
• - A hose and / or plastic pipe system, preferably for flow measurement in automated industrial or laboratory systems, the measuring pipe arrangement being connected to the hose and / or plastic pipe system and the flow rate and / or the volume flow and / or the mass flow of the flowable being set up for this purpose To measure the medium.

The measuring tube arrangement according to the invention is advantageously integrated in a hose and / or plastic pipe system and is thus available to the fitter for attachment to a buffer production device, a cell harvesting device, a media production device, a filter device, a virus activator, a bioreactor and / or a virus filtration device. This saves the fitter from having to put together the usually sterilized hose and / or plastic tube system with the sterilized measuring tube arrangement.

One embodiment provides that the measuring tube arrangement and the hose and / or plastic tube system is arranged in a container, in particular a sterilization bag, which is designed to maintain sterility of the measuring tube arrangement and the hose and / or plastic tube system until the container is opened,
wherein the measuring tube system is sterilized by means of radiation sterilization, preferably gamma radiation sterilization or electron beam sterilization, superheated steam sterilization and / or gas sterilization.

In biomedical applications there is a great need for automated process monitoring. Sterilized measuring components are essential for such applications. It is therefore advantageous if the measuring tube system is sterilized in particular by gamma ray sterilization, and the sterility is maintained by accommodating the measuring tube system in a container. Plastic bags, which allow gamma rays and / or electron beams to pass through essentially completely, but are impermeable to impurities and germs, are preferably suitable as containers.

One embodiment provides that at least one process monitoring unit is connected to the hose and / or plastic pipe system,
wherein the process monitoring unit has a pressure transducer, temperature sensor, a balance, a pH sensor, a density sensor, a flow meter for determining a mass flow, a volume flow and / or a flow rate, a flow switch, a level sensor, a conductivity sensor, a concentration sensor, an oxygen sensor and / or comprises a turbidity sensor.

• - einen Trägereinheitskörper zum Befestigen einer Messrohranordnung, insbesondere der erfindungsgemäßen Messrohranordnung, oder eine Messrohrsystem, insbesondere das erfindungsgemäße Messrohrsystem, wobei der Trägereinheitskörper eine Aufnahme für die Messrohranordnung aufweist, wobei die Aufnahme derart ausgebildet ist, dass die Messrohranordnung durch eine im Wesentlichen lineare Bewegung in eine Montagerichtung senkrecht zur Bezugsgerade in den Trägereinheitskörper eingeführt werden kann, wobei der Trägereinheitskörper zwei gegenüberliegende Seitenflächen aufweist, welche die Aufnahme senkrecht zur Längsrichtung der Messrohranordnung und eine weitere Seitenfläche, welche die Aufnahme in Montagerichtung beschränkt;
• - mindestens zwei Schwingungserreger, welcher dazu eingerichtet ist, die Messrohranordnung zu Schwingungen anzuregen, wobei die Schwingungserreger an den gegenüberliegenden Seitenflächen angeordnet sind; und
• - mindestens zwei Schwingungssensoren, welcher dazu eingerichtet ist, die Auslenkung der Schwingungen der Messrohranordnung zu erfassen, wobei die Schwingungssensoren an den gegenüberliegenden Seitenflächen angeordnet sind, wobei die Schwingungssensoren in Längsrichtung des Trägereinheitskörpers versetzt zum Schwingungserreger angeordnet sind.

The carrier unit according to the invention of a measuring device for detecting a mass flow rate, a viscosity, a density and / or a The size of a flowable medium derived therefrom comprises:

• - A carrier unit body for attaching a measuring tube arrangement, in particular the measuring tube arrangement according to the invention, or a measuring tube system, in particular the measuring tube system according to the invention, the carrier unit body having a receptacle for the measuring tube arrangement, the receptacle being designed such that the measuring tube arrangement can be converted into a Mounting direction can be inserted perpendicular to the reference line in the carrier unit body, wherein the carrier unit body has two opposite side surfaces which the receptacle perpendicular to the longitudinal direction of the measuring tube arrangement and a further side surface which limits the receptacle in the assembly direction;
• - At least two vibration exciters which are set up to excite the measuring tube arrangement to vibrate, the vibration exciters being arranged on the opposite side surfaces; and
• At least two vibration sensors, which are set up to detect the deflection of the vibrations of the measuring tube arrangement, the vibration sensors being arranged on the opposite side surfaces, the vibration sensors being arranged offset in the longitudinal direction of the carrier unit body relative to the vibration exciter.

It is particularly advantageous if the vibration sensors, in particular the coil devices, are attached to the carrier unit and not to the measuring tube arrangement. It is therefore sufficient if the magnet arrangements are arranged on the measuring tube arrangement, which means that the coil devices do not have to be exchanged when the measuring tube arrangement is exchanged.

One embodiment provides that a vibration sensor has two coil devices which are arranged offset from one another in the longitudinal direction of the carrier unit body.

One embodiment provides that the vibration exciter and the vibration sensor each have at least one coil device,
wherein the coil devices are each arranged in a recess in the carrier unit body.

The advantage of the design is that the assembly of the measuring tube arrangement is significantly simplified and when the measuring tube arrangement is inserted into the receptacle, there are no defects in the vibration exciters and vibration sensors due to, for example, tearing off of the magnets, etc.

One embodiment provides that the coil devices comprise at least one printed circuit board coil, in particular having a planar end face.

One embodiment provides that the carrier unit body has two end faces delimiting the carrier unit body in the longitudinal direction,
wherein a fixing device is arranged on each of the end faces, which is set up to establish a positive and / or non-positive connection between the measuring tube arrangement, in particular the connecting body of the measuring tube arrangement and the carrier unit body,
wherein the force-fit connection is realized via a force action of the fixing device on the connecting body perpendicular to a reference straight line connecting the two opposite side surfaces.

So far, the measuring tube arrangement has been fixed in a carrier unit by a force acting in the longitudinal direction of the connecting body. However, it has been found that, for better reproducibility of the vibration behavior of the individual measuring tubes, a force effect perpendicular to a reference line connecting the two opposite side surfaces is more advantageous.

The measuring device according to the invention for detecting a mass flow rate, a viscosity, a density and / or a variable derived therefrom of a flowable medium comprises:

• a measuring tube arrangement, in particular the measuring tube arrangement according to the invention or a measuring tube system, in particular the measuring tube system according to the invention;
• - a carrier unit, in particular the carrier unit according to the invention, wherein the measuring tube arrangement is arranged in the receptacle of the carrier unit and is mechanically detachably connected to the carrier unit;
• - A measuring and / or operating circuit, the measuring and / or operating circuit being set up to operate the vibration sensors and the vibration exciter, and being connected to them by means of electrical connections, the electronic measuring and / or operating circuit being further set up for this purpose is to determine and provide mass flow measured values, viscosity values and / or density measured values and / or values of a variable derived therefrom.

One embodiment provides that the fixing device has two fixing units,
wherein the fixing units each have a support surface on which the measuring tube arrangement with the mounting surfaces at least partially rests,
wherein at least one fixing unit is arranged between the coupler arrangement and the inlet side.

• 1 : eine Draufsicht auf eine Ausgestaltung des erfindungsgemäßen Messgerätes;
• 2: eine Draufsicht auf eine weitere Ausgestaltung des erfindungsgemäßen Messgerätes; und
• 3: eine Ausgestaltung des erfindungsgemäßen Messrohrsystems.

The invention is explained in more detail with reference to the following figures. It shows:

• 1 : a plan view of an embodiment of the measuring device according to the invention;
• 2 : a plan view of a further embodiment of the measuring device according to the invention; and
• 3 : an embodiment of the measuring tube system according to the invention.

The 1 shows a plan view of an embodiment of the measuring device according to the invention 2 . The measuring device 2 comprises a carrier unit 16 and a measuring tube assembly 4th , which in a predetermined mounting position in the carrier unit 16 is arranged. The measuring tube arrangement 4th is mechanically detachable with the carrier unit 16 connected and can be removed and replaced by loosening a non-positive and / or positive connection. The measuring tube arrangement 4th has two measuring tubes 3 , 3.2, which are straight and run parallel to each other. The two measuring tubes 3 , 3.2 each have a side 12 and a side 12, the respective sides 12 of the two measuring tubes facing one another and the respective sides 12 of the two measuring tubes facing away from one another. A magnet arrangement is located on each of the respective sides 12 9 attached, which at least two magnets 10 include. In the embodiment shown, there are exactly three magnets in the longitudinal direction of the respective measuring tube 3 , 3.2 staggered. The magnet arrangements are each in the measuring section of the measuring tube 3 , 3.2 arranged. The magnets 10 are with the associated measuring tube 3 , 3.2 glued or soldered. Alternatively, between the respective magnets 10 and the associated measuring tube 3 , 3.2 a connecting body can be arranged. The magnets 10 are preferably cylindrical and have a planar end face which is directed towards the respective coil device. The carrier unit 16 has side faces 24 , 24.2 what a recording 23 for the measuring tube arrangement 4th transversely to the longitudinal direction of the measuring tube arrangement 4th partially limited. The side faces 24 , 24.2 run parallel to each other. On the side surfaces 24 , 24 .2 are coil devices 25th , 25.2 , 25.3 attached, the coil device 25th with the magnet 10 together the vibration sensor 8, wherein the coil device 25th with the magnet 10 together the vibration sensor 8 and wherein the coil device 25th with the magnet 10 together the vibration exciter 7th form. The coil devices 25th , 25.3 , 25.3 each include a printed circuit board spool.

The recording 23 can also through two side walls transversely to the longitudinal direction of the measuring tube arrangement 4th be limited. In that case, the respective side surfaces extend 24 , 24.2 along the entire side walls. In addition, the coil devices are 25th , 25.2 , 25.3 arranged according to the configuration in a recess in the side wall.

The measuring tubes 3 , 3.2 are via a coupler arrangement 1 mechanically coupled to each other and thus form a single coupled oscillating system. The coupler arrangement 1 comprises three coupler elements according to the embodiment 6th in the inlet area and three coupling elements 6th in the run-out area. A coupler element 6th has a material thickness that is 1 to 4 times the wall thickness of the measuring tube 3 , 3.2 corresponds.

The carrier unit 16 comprises a fixing device 34 , which is set up for the measuring tube assembly 4th in the carrier unit 16 to fix and to decouple against external influences. The fixation device 34 has mounting surfaces 14th on, the measuring tube assembly 4th so with the carrier unit 16 to be connected is that the respective mounting surface 26th the measuring tubes 3 , 3.2 on the intended mounting surface 14th rests. A fixation device 34 is between enema 20th and coupler arrangement 1 arranged and another fixing device 34 is between coupler arrangement 1 and outlet arranged. The fixation device shown 34 is in direct contact with the two measuring tubes 3 , 3.2.

The measuring tubes 3 , 3.2 each have two process connections 30th on, which are designed as a flange. The measuring tubes 3 , 3.2 each have a measuring tube body 13th on, which comprises a material made of plastic, ceramic, glass and / or preferably metal.

The carrier unit 16 has a carrier unit body 22nd which includes plastic and / or metal.

The 2 shows a plan view of a further embodiment of the measuring device according to the invention 2 . The design of the 2 differs from the design of the 1 essentially by the fact that the two measuring tubes 3 , 3.2 via two connecting bodies 5 are connected to one another, the connecting body 5 to serve, the measuring tube arrangement 4th over the fixing device 34 with the carrier unit 16 connect to. The fixation device 34 is designed in such a way that when fixing the measuring tube arrangement 4th a force perpendicular to one through the two longitudinal planes of the two measuring tubes 3 , 3.2 defined level is effective.

The coupler arrangement also includes 1 exactly one coupler element 6th in the inlet area and exactly one coupler element 6th in the run-out area. The two coupler elements 6th each have the shape of an hourglass in longitudinal section, ie the material thickness decreases in the direction of the geometric center.

Furthermore, the measurement and / or operating circuit is in the illustrated embodiment 15th shown, which on the carrier unit 16 is arranged. The measuring and / or operating circuit 15th is connected to the six coil arrangements and is set up to tap a measurement signal at the coil arrangements or to apply an excitation signal. The measurement signal includes a voltage induced by a change in the magnetic field at the respective coil arrangements. The excitation signal includes a time-varying voltage that generates a time-varying magnetic field.

The measuring tubes 3 , 3.2 each have two process connections 30th on, which are designed as pneumatic quick connection connections and have a push-in design for connection to a hose and / or plastic pipeline. The measuring tubes 3 , 3.2 each have a measuring tube body 13th on, which comprises a material made of metal, ceramic, plastic and / or preferably glass.

The 3 shows an embodiment of the measuring tube system according to the invention 31 . A measuring tube arrangement 4th - in the case off 2 - is via the process connections 30th with a hose and / or plastic pipe system 17th connected. In the hose and / or plastic pipe system 17th is a process monitoring unit 19th integrated. The hose and / or plastic pipe system 17th has a bioprocess bag 33 and a connector 32 with which the measuring tube system 31 can be connected to a process line. The entire measuring tube system 31 is in a container 18th . In that case it is the container 18th a sterilization bag that is suitable for sterilization processes based on ionic radiation.

List of reference symbols

1

Coupler arrangement

2

Measuring device

3

Measuring tube

4th

Measuring tube arrangement

5

Connecting body

6th

Coupler element

7th

Vibration exciter

8th

Vibration sensor

9

Magnet arrangement

10

magnet

11

leg

12th

page

13th

Measuring tube body

14th

Mounting surface

15th

Measurement and / or operating circuit

16

Carrier unit

17th

Hose and / or plastic pipe system

18th

container

19th

Process monitoring unit

20th

enema

21

Outlet

22nd

Carrier unit body

23

admission

24

Side face

25th

Coil device

26th

Mounting surface

30th

Process connection

31

Measuring tube system

32

Connection element

33

Bioprocess bags

34

Fixing device

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 1807681 A1 [0002]
• WO 2011/099989 A1 [0004]
• US 10209113 B2 [0004]

Claims (17)

Measuring tube arrangement (4) of a measuring device (2) for detecting a mass flow rate, a viscosity, a density and / or a variable derived therefrom of a flowable medium, comprising: - two straight measuring tubes (3), which run parallel to each other, for guiding the flowable medium, wherein the measuring tubes (3) each have an inlet area, an outlet area and a measuring section arranged between the inlet area and the outlet area, wherein the measuring tubes have mounting surfaces (26) in the inlet area and in the outlet area, for the mechanically detachable installation of the measuring tube arrangement (4) in a carrier unit (16) in a position defined in particular by the mounting surfaces (26), - a coupler arrangement (1) for mechanically coupling the two measuring tubes (3), wherein the coupler arrangement (1) has at least two coupler elements (6), at least one coupler element (6) being arranged in the inlet area of the respective measuring tubes (3), at least one coupler element (6) being arranged in the outlet area of the respective measuring tubes (3); - two magnet arrangements (9) which are arranged in the measuring section of the respective measuring tubes (3), where exactly one magnet arrangement (9) is arranged on a measuring tube (3), wherein the magnet arrangements (9) each have at least two magnets (10) which are arranged one after the other in the direction of flow of the flowable medium. The measuring tube arrangement (4) Claim 1 , the measuring tubes (3) each having a longitudinal plane which divides the measuring tube into two sides (12), a reference straight line connecting the two measuring tubes intersecting the two longitudinal planes perpendicularly, the magnet arrangements (9) on the sides (12) facing away from one another. the measuring tubes (3) are arranged. The measuring tube arrangement (4) Claim 1 and / or 2, the measuring tubes (3) each having an in particular metallic measuring tube body (13) with a wall thickness of less than 1 millimeter, in particular less than 0.7 millimeter and preferably less than 0.25 millimeter. The measuring tube arrangement (4) Claim 1 and / or 2, the measuring tubes (3) each having a measuring tube body (13) which is made of steel, glass, ceramic and / or plastic, in particular of polyetheretherketones (PEEK), polyaryletherketones (PAEK), polyphenylsulfones (PPSU) , Polyethersulfones (PESU), polysulfones (PSU), polyarylamides (PARA). Measuring tube arrangement (4) according to at least one of the preceding claims, wherein the coupler arrangement (1) has exactly six coupler elements (6), whereby three coupler elements (6) are arranged in the inlet area of the two measuring tubes (3) and three coupler elements (6) are arranged in the outlet area of the two measuring tubes (3). Measuring tube arrangement (4) according to at least one of the preceding claims, wherein the measuring tubes (3) are connected to one another via a connecting body (5), wherein the connecting body (5) is arranged between the coupler arrangement (1) and the inlet (20), wherein the connecting body (5) has the mounting surfaces (26). Measuring tube arrangement (4) according to one of the Claims 1 to 6th , the mounting surfaces (26) being on the measuring tubes (3). Measuring tube system (31), comprising: - a measuring tube arrangement (4), in particular the measuring tube arrangement (4) according to at least one of the preceding claims; and - A hose and / or plastic pipe system (17), preferably for flow measurement in automated industrial or laboratory systems, the measuring pipe arrangement (4) being connected to the hose and / or plastic pipe system (17) and the flow rate and / or being set up for this purpose to measure the volume flow and / or the mass flow of the flowable medium. Measuring tube system (31) Claim 8 , the measuring tube arrangement (4) and the hose and / or plastic tube system (17) being arranged in a container (18), in particular a sterilization bag, which is designed to ensure sterility of the measuring tube arrangement (4) and the hose and / or plastic tube system ( 17) up to the opening of the container (18), the measuring tube system (31) being sterilized by means of radiation sterilization, preferably gamma-ray sterilization or electron beam sterilization, superheated steam sterilization and / or gas sterilization. Measuring tube system (31) Claim 8 and / or 9, wherein at least one process monitoring unit (19) is connected to the hose and / or plastic pipe system (17), the process monitoring unit (19) having a pressure transducer, temperature sensor, a scale, a pH sensor, a density sensor Flow measuring device for determining a mass flow, a volume flow and / or a flow rate, comprises a flow switch, a level sensor, a conductivity sensor, a concentration sensor, an oxygen sensor and / or a turbidity sensor. Carrier unit (16) of a measuring device (2) for detecting a mass flow rate, a viscosity, a density and / or a variable derived therefrom of a flowable medium, comprising: - a carrier unit body (22) for fastening a measuring tube arrangement (4), in particular the measuring tube arrangement ( 4) after one of the Claims 1 to 7th , or a measuring tube system (31), in particular the measuring tube system (31) according to one of the Claims 8 to 10 , wherein the carrier unit body (22) has a receptacle (23) for the measuring tube arrangement (4), wherein the receptacle (23) is designed such that the measuring tube arrangement (4) by a substantially linear movement in an assembly direction perpendicular to the reference line in the Carrier unit body (22) can be introduced, wherein the carrier unit body (22) has two opposite side surfaces (24) which the receptacle perpendicular to the longitudinal direction of the measuring tube arrangement (4) and preferably a further side surface which limits the receptacle in the assembly direction; - At least two vibration exciters (7) which are set up to excite the measuring tube arrangement (4) to vibrate, the vibration exciters (7) being arranged on the opposite side surfaces (24); and - at least two vibration sensors (8) which are set up to detect the deflection of the vibrations of the measuring tube arrangement (4), the vibration sensors (8) being arranged on the opposite side surfaces (24), the vibration sensors (8) in the longitudinal direction of the carrier unit body (22) are arranged offset to the vibration exciter (7). Carrier unit after Claim 11 wherein a vibration sensor (8) has two coil devices (25) which are arranged offset from one another in the longitudinal direction of the carrier unit body (22). Carrier unit after Claim 11 and / or 12, the vibration exciter (7) and the vibration sensor (8) each having at least one coil device (25), the at least one coil device (25) each being arranged in a recess in the carrier unit body (22). Carrier unit after Claim 13 wherein the coil devices (25) comprise at least one printed circuit board coil, in particular having a planar end face. Carrier unit according to at least one of the Claims 11 to 14th , wherein the support unit body (22) has two end faces delimiting the support unit body (22) in the longitudinal direction, a fixing device (34) being arranged on each end face, which is set up for a form-fitting and / or force-fitting connection between the measuring tube arrangement (4), in particular the connection body (5) of the measuring tube arrangement (4) and the support unit body (22), the non-positive connection being realized via a force action of the fixing device (23) on the connection body (5) perpendicular to a reference line connecting the two opposite side surfaces (24) . Measuring device (2) for detecting a mass flow rate, a viscosity, a density and / or a variable derived therefrom of a flowable medium, comprising: a measuring tube arrangement (4), in particular the measuring tube arrangement (4) according to one of the Claims 1 to 7th or a measuring tube system (31), in particular the measuring tube system (31) according to one of the Claims 8 to 10 ; - A carrier unit (16), in particular the carrier unit (16) according to one of the Claims 11 to 15th wherein the measuring tube arrangement (4) is arranged in the receptacle (23) of the carrier unit (16) and is mechanically detachably connected to the carrier unit (16), in particular to the carrier unit body (22); - A measuring and / or operating circuit (15), the measuring and / or operating circuit (15) being set up to operate the vibration sensors (8) and the vibration exciter (7) and being connected to them by means of electrical connections, wherein the electronic measuring and / or operating circuit (15) is further set up to determine and provide mass flow measured values, viscosity values and / or density measured values and / or values of a variable derived therefrom. Measuring device (2) Claim 16 wherein the fixing device (34) has two fixing units, the fixing units each having a mounting surface (14) on which the measuring tube arrangement (4) with the mounting surfaces (26) at least partially rests, wherein at least one fixing unit is arranged between the coupler arrangement (1) and the inlet.

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