Endress + Hauser Flowtec Ag

Holger Bernhard

Ennio Bitto

Rainer Lorenz

Christian Matt

Gebhard Gschwend

Alfred Rieder

Hao Zhu

Christian Schütze

Michael Lambrigger

Christian Schuetze

Michael Lammbrigger

An adapter includes several connecting nozzles. Free nozzle ends of the connecting nozzles are adapted to be connected to line ends of fluid lines. The adapter includes, for guiding flowing fluid in and then out, two mutually separated, tubular flow channels. Moreover, the adapter includes a projection, which extends from the nozzle end with a length to a free projection end remote therefrom. A fluid line system formed by means of the adapter comprises, furthermore, a fluid line with, enveloped by a wall, a lumen. The fluid line can be connected with its line end to the connecting nozzle of the adapter in such a manner that the projection protrudes inwardly into the lumen of the fluid line to form two tubular chambers of the fluid line mutually separated by the projection and adapted for guiding through flowing fluid.

Fluid line system with adapter for connecting fluid lines

Adapter for connecting fluid lines and fluid line system formed therewith

Method for monitoring and/or checking a pressure device having a lumen surrounded by a wall for conveying and/or storing a fluid. For such purpose, the method comprises a step of registering a strain, of the wall, by means of a strain gage, respectively a strain sensor formed therewith, affixed outwardly on the wall, for ascertaining a strain value representing the strain of the wall, as well as a step of using the strain value for ascertaining damage to the wall, as a result of plastic deformation of the wall and/or as a result of wear of the wall. A measuring system of the invention comprises supplementally to the pressure device at least one strain sensor affixed on a wall segment of the wall for producing a strain signal dependent on a time variable strain, of the wall segment as well as a transmitter electronics electrically coupled with the strain sensor. The transmitter electronics is adapted to receive the strain signal as well as with the application of the strain signal to ascertain damage to the wall.

Measuring system with a pressure device as well as method for monitoring and/or checking such a pressure device

A measuring system for measuring at least one measured variable of a flowing fluid, comprises a fluid supply line, a transducer apparatus, which has a tube and at least one other tube and is adapted to deliver at least one measurement signal corresponding to the at least one measured variable, a fluid return line, and a fluid withdrawal line. To open a first flow path, which leads from the lumen of the fluid supply line to the lumen of the tube, further to the lumen of the tube and further to the lumen of the fluid return line, equally as well not to the lumen of the fluid withdrawal line, and thereafter to allow fluid to flow along the flow path for the maintaining the temperature and/or for cleaning of parts of the measuring system and/or for conditioning fluid. It is, additionally, provided (instead of the first flow path) thereafter to open a second flow path, which leads from the lumen of the fluid supply line to the lumen of the first tube and, in parallel, to the lumen of the second tube and further from the lumen of the first tube, and from the lumen of the second tube, in each case, to the lumen of the fluid withdrawal line, as well as to allow fluid to flow along the second flow path. Moreover, it is provided, while allowing fluid to flow along the second flow path, in given cases, also while allowing fluid to flow along the first flow path, to generate at least one measurement signal, as well as to use the measurement signal for ascertaining measured values of the at least one measured variable.

Measuring system for measuring at least one measured variable of a fluid as well as method for operating such a measuring system

The method serves for monitoring and/or checking a pressure device having a lumen surrounded by a wall for conveying and/or storing a fluid. To this end, the method comprises a step of registering both a strain of a first wall segment as well as also a strain of at least a second wall segment spaced from the first wall segment, for ascertaining a strain deviation value representing a difference between the strain of the first wall segment and the strain of the second wall segment, as well as a step of using the strain deviation value for ascertaining damage to the wall, as a result of plastic deformation of the wall and/or as a result of wear of the wall. The measuring system of the invention comprises supplementally to the pressure device a first strain sensor affixed on the first wall segment for producing a first strain signal dependent on a time variable strain of the first wall segment as well as at least a second strain sensor affixed on the second wall segment for producing a second strain signal dependent on a time variable strain of the second wall segment. Moreover, the measuring system comprises a transmitter electronics electrically coupled both with the first strain sensor as well as also the second strain sensor. The transmitter electronics is adapted to receive both the first strain signal as well as also the second strain signal as well as to ascertain, with application of the strain signals, damage to the wall.

The measuring transducer includes at least one measuring tube communicating with a line connected during operation for conveying a medium to be measured, and a support element oscillatably holding the at least one measuring tube. Additionally, it is provided that the support element contains at least two passageways, via which the at least one measuring tube communicates with the line, and that the at least one measuring tube is affixed, especially releasably, at least one end to the support element by means of a screwed-fitting at one of the passageways. Alternatively or in supplementation thereof, it is further provided that the at least one measuring tube is, at least in part, made of cold-strengthened, for instance cold-stretched or autofrettaged, material. As required, the measuring transducer can further include at least two measuring tubes communicating with the line for conveying the medium; each of these two measuring tubes is to be connected to an inlet-side distributor element and an outlet-side distributor element. In such case, at least one of the two distributor elements can be embodied as an integral component of the support element, so that the support element can be kept, at least in the area of this at least one distributor element, free of materially bonded, joined locations, especially free of solder, braze or weld connections. The measuring transducer of the invention is especially provided also for applications in which the medium to be measured acts with a pressure of more than 500 bar, especially over 700 bar, on the measuring tube.

Method for manufacturing a measuring transducer of vibration-type

The measuring transducer includes at least one measuring tube communicating with a line connected during operation for conveying a medium to be measured, and a support element oscillatably holding the at least one measuring tube. Additionally, it is provided that the support element contains at least two passageways, via which the at least one measuring tube communicates with the line, and that the at least one measuring tube is affixed, especially releasably, at at least one end to the support element by means of a screwed-fitting at one of the passageways. Alternatively or in supplementation thereof, it is further provided that the at least one measuring tube is, at least in part, made of cold-strengthened, for instance cold-stretched or autofrettaged, material. As required, the measuring transducer can further include at least two measuring tubes communicating with the line for conveying the medium; each of these two measuring tubes is to be connected to an inlet-side distributor element and an outlet-side distributor element. In such case, at least one of the two distributor elements can be embodied as an integral component of the support element, so that the support element can be kept, at least in the area of this at least one distributor element, free of materially bonded, joined locations, especially free of solder, braze or weld connections. The measuring transducer of the invention is especially provided also for applications in which the medium to be measured acts with a pressure of more than 500 bar, especially over 700 bar, on the measuring tube.

Measuring transducer of vibration-type

A method serves to adjust a mechanical natural frequency of a hollow body which at least partly comprises a ductile material, in particular a pickup housing of a measurement pickup or a measurement pipe of a measurement pickup. A static external pressure of an atmosphere surrounding the hollow body and/or a static internal pressure prevailing in a lumen of the hollow body, the lumen being sealed off substantially in a pressuretight fashion, is varied in order to generate a pressure difference between the lumen and the atmosphere surrounding the hollow body. The pressure difference is adjusted to a value that causes the material of the hollow body to expand, and at least a proportion of the material of the hollow body is made to flow under the influence of the pressure difference for plastically deforming the material. The method can readily be integrated into already-established pressure tests for measurement pickups of the vibrational type.

Method for adjusting a mechanical natural frequency

A measurement pickup includes at least four measuring tubes for conveying media to be measured. Each measuring tube has a first in-/outlet end and a second in-/outlet end. During operation, the measuring tubes vibrate, at least at times, especially simultaneously. The measurement pickup further includes an electromechanical exciter mechanism causing the measuring tube to vibrate, as well as a sensor arrangement reacting at least to local vibrations of the measuring tubes for producing at least one measurement signal influenced by vibrations of the measuring tubes. Of the at least four measuring tubes, two measuring tubes are, at least at times, inserted into the course of a first medium-line such that each of these two measuring tubes simultaneously conveys, in each case, a partial volume of a medium flowing through the first medium line, and two other measuring tubes of the at least four measuring tubes are, at least at times, inserted into the course of a second medium line such that each of these two measuring tubes simultaneous conveys, in each case, a partial volume of a second medium flowing through the second medium line. The measurement pickup can thus, on the one hand, have two media flowing through it, which differ measurably from one another in at least one physical property, for example mass flow rate, medium density and/or medium temperature, while having, on the other hand, despite the different media, a good zero-point stability.

Growing community of inventors

Grenzach-Wyhlen, Germany

Holger Bernhard