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
  • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
  • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/12—Flanged joints specially adapted for particular pipes
  • F16L23/125—Flanged joints specially adapted for particular pipes with an internal or external coating
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/16—Flanged joints characterised by the sealing means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L9/00—Rigid pipes
  • F16L9/02—Rigid pipes of metal
• • 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
  • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
  • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
  • G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
• • 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
  • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
  • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
  • G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
• • 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
• • 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
  • G01F15/18—Supports or connecting means for meters

Definitions

• the invention relates to a measuring tube for a flow meter. Furthermore, the invention relates to a magnetic-inductive flowmeter.
• the invention further relates to a sealing ring-free flange connection and a method for producing a measuring tube for a flowmeter.
• a measuring tube for determining the flow.
• a measuring transducer attached to the measuring tube or integrated in the measuring tube serves to detect a measured variable associated with the flow through the measuring tube.
• different measuring principles have become known from the state of the art in order to determine the flow through such a measuring tube.
• the determination of the flow can be carried out for example on the basis of the ultrasonic measurement principle or on the basis of the magnetic-inductive measurement principle. Due to the different applications in which such flowmeters are used, it is necessary to line the measuring tube with an electrically insulating material.
• This lining is a function of the temperature and the medium which are present in a particular application, for example of a thermoplastic, a thermosetting or elastomeric plastic.
• the measuring tube is at its two ends in each case via a
• the object is achieved by a measuring tube, a magnetic-inductive flow meter, a sealing ring flange-free connection and a method for producing a measuring tube for a flow meter.
• the task is performed by a measuring tube for a
• Solved flow meter wherein the measuring tube has a lining, wherein the lining has at least one sealing lip, which sealing lip serves a sealing effect between the measuring tube and a in the installed state of the
• the lining and the sealing lip serve to achieve the sealing effect essentially by a surface pressure with the adjoining pipe
• the proposed seal thus serves to prevent the escape of the medium, which is for example a liquid or a gas. It is gem.
• this embodiment of the invention proposed a wetted, static seal.
• Lining and / or sealing lip are designed so that by a contact force on the sealing surfaces, a mean surface pressure arises, which corresponds at least to the pressure of the medium to be sealed.
• the measuring tube has at least one flange, which flange serves to connect the measuring tube to the adjacent pipeline, wherein the lining at least a part of the Flange covered and the at least one sealing lip is located in a flange covering part of the lining.
• a gasket attached to the flange is a so-called flat gasket.
• the sealing effect can by the, for example by means of connecting bolts, each for connecting one
• the lining extends not only on the inner wall of the measuring tube, but also on at least part of a flange of the measuring tube. In the part of the flange covered by the lining, the at least one sealing lip can be provided. Since such prior art measuring tubes are clamped between two conduits, the proposed measuring tube can have at each of its two ends a flange which is connected to the lining and in the region in which the
• Lining the flange covered is provided with a sealing lip.
• the flange has a first, serving as a stop, preferably flat, surface which is free of the lining, said free surface of the lining serves as a stop for a mating flange of the adjacent pipes.
• the stop can prevent compression of the seal beyond a maximum predetermined pretension.
• the flange has a second, preferably flat, surface connected to the stop, preferably over a shoulder, which is covered by the lining and which second surface is preferably offset along the measuring tube axis with respect to the first surface.
• a separation of the functions of the flange connection can take place:
• the flange for clamping the measuring tube between two pipes are used and on the other hand, the flange connection to the seal Serve connection between these pipe sections.
• the first and the second surface of the flange are preferably flat surfaces which are arranged substantially perpendicular to the measuring tube axis.
• a maximum compression or maximum deformation of the sealing lip can be predetermined by the first surface serving as a stop.
• the height of the heel and the amount of material of the lining or the size of the sealing lip can be adjusted to each other in order to achieve an optimum sealing effect.
• the lining and / or the sealing lip projects at least partially beyond a height predetermined by the first surface along the measuring tube axis.
• the given height is the point of intersection between the first surface, or an imaginary continuation of the first surface, and the measuring tube axis.
• the lining extends (only) to the second surface offset along the measuring tube axis with respect to the first surface.
• the flange has an end face which is at least partially covered by the lining, the sealing lip projecting from the lining covering this end face.
• the sealing lip is outward, d. H. in the direction of the adjacent pipeline, from this end face.
• This protruding part serving as a sealing lip can be elastically and / or plastically deformed during the adaptation or pressing of the flange connection, so that a sealing effect is achieved between the sealing surfaces of the flanges.
• the at least one sealing lip has a substantially circular cross-section.
• other sealing lip geometries are possible.
• a fir tree-like structure of the sealing lip or a plurality of sealing lips formed by undercuts is also possible.
• the at least one sealing lip is part of the lining. Sealing lip and lining, for example, merge materially into each other.
• the sealing lip consists of the same material as the lining. It has been found that a variety of materials used today for the lining can also be used as a sealing material, such as polyurethane, Teflon, natural rubber, hard rubber. In a further embodiment of the measuring tube, in particular a plurality of annular sealing lips are provided. As a result, a plurality of sealing steps can be formed.
• a first sealing lip and a second sealing lip are provided, which are spaced at different distances from the measuring tube axis, wherein preferably the second sealing lip is further away from the
• Measuring tube axis is spaced, as the first sealing lip.
• the maximum diameter of the first sealing lip is greater than the maximum diameter of the second sealing lip.
• the sealing lips form annular Korrugationen on the front side of the flange covering the lining.
• the flange has on the front side at least one recess, for example in the form of a groove, which is at least partially covered and / or filled by the lining.
• the lining has a corresponding recess in the height of the recess in the flange. This ensures that a maximum allowable pressure, i. Contact pressure, is not exceeded, which would result in destruction of the seal.
• the object is achieved by a magnetically inductive flowmeter with a measuring tube according to one of the aforementioned embodiments.
• the object is achieved by a sealing ring-free flange connection between a measuring tube according to one of the o.g.
• the object is achieved by a method for producing a measuring tube for a flow meter, wherein the measuring tube is lined with a lining, which lining has at least one sealing lip, which serves for producing a sealing effect between the measuring tube and an adjacent pipeline.
• the sealing lip can during the lining process of the Measuring tube inserted or mounted in the liner.
• the sealing lip can also be introduced into the lining after the production of the lining.
• Lining be provided and then the sealing lip are prepared in the lining in the flanges.
• the proposed invention makes it possible to provide a measuring tube with a lining and at least one integrated in the lining sealing lip, which allows easy mounting of the measuring tube. Further, the proposed invention makes it possible to reduce the thickness of the flanges attached to the measuring tube, since even if the predetermined tightening torques and torques are exceeded, deformation of the flange does not affect the tightness of the gasket used.
• FIG. 1 a shows a schematic representation of a pipeline section comprising a measuring tube and a pipeline adjacent thereto
• Fig. 1 b a schematic representation of an enlarged section of the
• Fig. 1 c a schematic representation of a further enlarged section of the flange according to. 1a
• 2a a schematic representation of an embodiment of the proposed invention with a plurality of sealing lips
• Fig. 3b a schematic representation of a second embodiment of the sealing lip
• 3c shows a schematic representation of a third embodiment of the sealing lip
• FIG. 3d a schematic representation of a fourth embodiment of
• Figure 1 shows a pipe section 2, which consists of a measuring tube 1 of a
• Flow meter and an adjacent pipe 2 consists.
• the measuring tube 1 has at its two ends on a flange F1, F2, which serves to connect the measuring tube 1 with adjacent to the respective ends of the pipe 2.
• the measuring tube 1 is provided with a lining A.
• Lining A covers the lumen, that is, the inner wall of the measuring tube 1 and also extends beyond a part of the end faces S of the flanges F1, F2 of the measuring tube. 1
• the measuring tube 1 further comprises a support tube T, to which the lining A is attached. At the ends of this support tube T, a flange F1, F2 is provided in each case.
• the flanges F1, F2 can either be welded to the ends of the support tube T or consist of the flanged ends of the support tube T.
• the carrier tube T shown in FIG. 1 comprises half shells H1, in which a part of the measuring arrangement for determining the flow is accommodated.
• Typical such measuring arrangements use the principle of magnetic-inductive flow measurement or an ultrasonic measuring principle.
• flowmeters have also become known which, for example, use the thermal or so-called vortex measuring principle to determine the flow through the measuring tube 1 and have a measuring tube 1 with a lining A.
• the lining A serves depending on the application of the flowmeter and / or depending on the measurement principle different purposes.
• a lining A may be required in order to produce a medium such as, for example, in the pharmaceutical or pharmaceutical industry
• linings A so-called liners, are known from the state of the art, which consist of a plastic, such as, for example, polyurethane.
• the measuring tube 1 is lined not only with the lining A inside, but the lining A extends beyond the end of the measuring tube 1 to the flanges F1, F2, which are provided at the two ends of the measuring tube 1 the flanges F1, F2 are at least partially covered by the lining A.
• a gasket D in the form of sealing lips D1, D2, Dn in the liner A, for sealing the joint V of the metering tube 1, i. the flange connection between the measuring tube 1 and the respective adjacent pipe 2, serve.
• the sealing lips D1, D2, Dn can thereby, for example. While the liner A is applied to the support tube T or after the liner A has been applied to the support tube T, are formed, for example. By the lining A is formed.
• Fig. 1 b shows an enlarged view of the flange V between the
• Measuring tube 1 and the adjacent pipe 2 As the measuring tube 1 is provided in the embodiment shown in Figure 1 a, 1 b and 1 c, the adjacent pipe 2 with a lining AR. However, it is also possible that the adjacent pipes 1 have no lining AR, i. are free from a lining AR.
• the flange connection V is made via the respective flanges F1, F2 by the flanges F1, F2 are biased against each other by connecting bolts which are inserted into corresponding bores B.
• the sealing lips D1, D2, Dn and / or the lining A of the measuring tube 1 are pressed against the counter flange G of the adjacent pipeline 2, so that a sealing surface press connection in the region of the flanges F1, G arises.
• Fig. 1 c shows a further enlarged view of the surface pressure between the measuring tube 1 and the adjacent pipe 2.
• the sealing lip D of the measuring tube 1 consists in the embodiment shown in Figure 1 c of two mutually merging sealing lips D. These sealing lips D are when exercising a
• Fig. 2a shows a sealing lip arrangement which equidistant from several here
• sealing lips Dn spaced sealing lips Dn consists.
• the sealing lips Dn have substantially the same shape.
• the sealing lips Dn shown in Figure 2a are preferably arranged concentrically to the measuring tube axis and extend substantially in a plane perpendicular to the measuring tube axis annularly on the end face S of the flange F1, F2 of the measuring tube 1. As a result, a plurality of sealing steps are formed, which prevent leakage of the medium ,
• a sealing arrangement which consists of a single sealing lip D1, which is integrated into the lining A of the measuring tube and consists of the same material as the lining A.
• Fig. 3a shows a sealing arrangement consisting of a (single) sealing lip D1.
• the flange F1 of the measuring tube 1 shown in Fig. 3a has a first surface S1, i. flat surface, on, which is free of the lining A and as a stop for the
• Counter flange G of the adjacent pipe 2 is used.
• the flange F1 further has a second surface S2 which is covered by the liner A.
• From the lining A is a sealing lip D1.
• no overload of the seal D1 is possible because a defined gap SP is created, which is filled by the lining A and the sealing lip D1. Furthermore, this prevents a so-called "flow" of the lining A.
• FIG. 3b shows a further embodiment of a seal in which a (single) sealing lip D1 is provided.
• the flange F1 has a surface S2 covered by the lining A.
• a recess R1 is provided in the form of a groove in the flange F1.
• the lining A has a
• Sealing lip D1 which protrudes from the lining A. This can ensure that a sealing effect is achieved, even if the flange F1 of the measuring tube 1 and the counter flange G of the adjacent pipeline 2 are not tightened to block. In the case that the flanges F1, G are tightened to block, is denoted by Groove R1 ensures that a defined sealing effect is achieved. Furthermore, the contact pressure with which the sealing effect of the sealing lip D1 is achieved can be substantially independent of the force which is conducted via the flange connection V.
• Fig. 3c shows a seal which consists of two sealing lips D1, D2 different size. The size of the sealing lips D1, D2 can be based on the radius or
• Diameter of the cross-sectionally circular surface of the sealing lip D1 or D2 are determined. Thus, a redundant seal can be achieved.
• the second sealing lip D2 is arranged at the end of the lining A, which covers the flange F1. Further, the second sealing lip D2 directly adjoins the shoulder at which the first surface S1 of the flange F1, which is free of the liner A, joins with the second surface S2 of the flange F1, which is covered by the liner A.
• the first sealing lip D1, which has a larger diameter than the second sealing lip D2 is arranged closer to the measuring tube axis than the second sealing lip D2.
• Fig. 3d shows a gasket having a recess R1 in the form of a groove in the flange F1 of the measuring tube 1, which is filled by the liner A.
• a recess Q1 is provided on the surface of the liner.
• the recess Q1 is also configured in a circular arc.
• two sealing lips D1, D2 are provided on the lining S covering the end face S of the flange F1. This arrangement also makes it possible to compensate for an excessive contact force between the flanges F1, G without damaging the seal and thereby leaking. Due to the sealing lips D1, D2 can also be too low
• Fig. 3e shows a further embodiment of a proposed flange seal.
• a first sealing lip D1 is provided on the end face S of the flange F1 covering the lining A, which is larger than a second further than the first sealing lip D1 of the measuring tube axis second sealing lip D2.
• the flange F1 has a shoulder over which a first surface S1 covered by the lining
• a gap R is provided, for example, consists of a recess in the liner A, which gap R serves as a reservoir to when the flanges F1, G are attracted to block, a To prevent overloading of the seal, in particular the second sealing lip D2.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Mechanical Engineering (AREA)
• Power Engineering (AREA)
• Measuring Volume Flow (AREA)
• Flanged Joints, Insulating Joints, And Other Joints (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Gasket Seals (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=47915195

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Citations (3)

Family Cites Families (22)

• 2012
  • 2012-04-26 DE DE201210103685 patent/DE102012103685A1/de not_active Withdrawn
• 2013
  • 2013-03-19 EP EP13711339.5A patent/EP2841887A1/de not_active Withdrawn
  • 2013-03-19 WO PCT/EP2013/055633 patent/WO2013160020A1/de not_active Ceased
  • 2013-03-19 US US14/396,497 patent/US9500504B2/en not_active Expired - Fee Related
  • 2013-03-19 IN IN2317MUN2014 patent/IN2014MN02317A/en unknown
  • 2013-03-19 CN CN201380021782.0A patent/CN104254762A/zh active Pending

Patent Citations (3)

Non-Patent Citations (1)

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