Abstract: Flow straightener for a flowmeter, in particular an ultrasonic metering device, which can be fitted into a flow pipe which is upstream of or in the flowmeter and through which the fluid to be measured flows with a main direction of flow (H), comprising a number of vanes (11, 12, 16, 17), which each have surfaces (13) that are parallel to one another and, in the fitted position, run parallel to the main direction of flow (H) of the fluid to be measured, the vanes (11, 12, 16, 17) being arranged in such a way that, in the fitted position, the flow cross section (Q) of the fluid-carrying flow pipe is subdivided into a number of partial cross sections (TQ1,2,3,4,5), at least some of the partial cross sections (TQ1,2,3,4,5) being of different sizes.

Abstract: The invention relates to a fluid meter (1) having a measuring tube housing (2), a measuring zone (3) inside the measuring tube housing (2), an ultrasonic transducer configuration of at least one ultrasonic transducer (4 and/or 5) for generating an ultrasonic signal and/or converting an ultrasonic signal passing through the measuring zone (3) into an electric signal and a deflecting device (11) for deflecting the ultrasonic signal in particular in the longitudinal direction of the measuring tube (3) such that the surface normal N of the ultrasonic transducer (4 and/or 5) is arranged so it is inclined laterally based on the top position of the fluid-filled interior of the measuring tube housing (2) in the installed position with the plane E such that the ultrasonic signal does not strike the deflecting device (11) from above in the installed position of the fluid meter (1).

Abstract: An arrangement for signal processing in ultrasonic transducers in flow meters has an ultrasonic transducer acted upon by a drive signal with the ultrasonic transducer being connected to a resonant circuit matched to the frequency of the drive signal. The resonant circuit can be a component of the network which makes switching over the ultrasonic transducer for transmitting operation to a receiving operation possible. An ultrasonic flow meter uses time-of-flight principle for transmitting and receiving ultrasonic signals and signal post-processing of the received ultrasonic signals. To make available an ultrasonic flow meter that produces an improved quality voltage signal for evaluation and at the same time makes possible a reduction of its production costs, a ringing circuit is provided. The ringing circuit may be a series ringing circuit for signal post-processing of the received ultrasonic signals connected to a comparator and using an LC-circuit, a Pi-filter or an RLC-circuit.

Abstract: The invention relates to a flow meter for liquid or gaseous media, the flow meter has a measuring channel through which the medium flows, at least one inlet channel and at least one outlet channel and also at least one pair of ultrasound converters for emitting and receiving ultrasound signals, wherein for guiding an ultrasound signal from one ultrasound converter to the other ultrasound converter, at least one pair of reflectors is arranged in the measuring channel, the diameter of the measuring channel is reduced using a reducer in certain regions for guiding the flow of the medium, wherein the reducer is formed by a measuring channel insert, which is arranged on and/or integrated into the measuring channel inner wall, and which is used simultaneously for holding or fixing other functional parts. Furthermore, the invention relates to a flow meter, in which a flow guide plate is used as a holding plate for the pair of reflectors and stretches in the longitudinal direction of the measuring channel.

Abstract: The invention relates to a flow meter for liquid or gaseous media, the flow meter has a measuring channel through which the medium flows, at least one inlet channel and at least one outlet channel and also at least one pair of ultrasound converters for emitting and receiving ultrasound signals, wherein for guiding an ultrasound signal from one ultrasound converter to the other ultrasound converter, at least one pair of reflectors is arranged in the measuring channel, the diameter of the measuring channel is reduced using a reducer in certain regions for guiding the flow of the medium, wherein the reducer is formed by a measuring channel insert, which is arranged on and/or integrated into the measuring channel inner wall, and which is used simultaneously for holding or fixing other functional parts. Furthermore, the invention relates to a flow meter, in which a flow guide plate is used as a holding plate for the pair of reflectors and stretches in the longitudinal direction of the measuring channel.

Abstract: The invention relates to an arrangement for signal processing in ultrasonic transducers in flow meters, wherein the ultrasonic transducer is acted upon by a drive signal, the ultrasonic transducer being connected to a resonant circuit matched to the frequency of the drive signal. The resonant circuit can be, in particular, a component of a network, which makes possible a switching over of an ultrasonic transducer from a transmitting operation to a receiving operation. The present invention further relates to an ultrasonic flow meter according to the time-of-flight principle, with means for transmitting and receiving ultrasonic signals as well as means for signal post-processing of the received ultrasonic signals.

Abstract: The invention relates to a flow meter for liquid or gaseous media, said flow meter comprising a measuring channel through which the medium flows, at least one inlet channel and at least one outlet channel and also at least one pair of ultrasound converters for emitting and receiving ultrasound signals, wherein for guiding an ultrasound signal from one ultrasound converter to the other ultrasound converter, at least one pair of reflectors is arranged in the measuring channel, the diameter of the measuring channel is reduced using a reducer in certain regions for guiding the flow of the medium, wherein the reducer is formed by a measuring channel insert, which is arranged on and/or integrated into the measuring channel inner wall, and which is used simultaneously for holding or fixing other functional parts. Furthermore, the invention relates to a flow meter, in which a flow guide plate is used as a holding plate for the pair of reflectors and stretches in the longitudinal direction of the measuring channel.

Abstract: The invention relates to a flow meter for liquid or gaseous media, said flow meter comprising a measuring channel (1) through which the medium flows, at least one inlet channel and at least one outlet channel and also at least one pair of ultrasound converters (2, 3) for emitting and receiving ultrasound signals, wherein for guiding an ultrasound signal from one ultrasound converter (2 and/or3) to the other ultrasound converter (3 and/or 2), at least one pair of reflectors (4, 5) is arranged in the measuring channel (1), the diameter of the measuring channel (1) is reduced using a reducer (7) in certain regions for guiding the flow of the medium, wherein the reducer (7) is formed by a measuring channel insert, which is arranged on and/or integrated into the measuring channel inner wall (6), and which is used simultaneously for holding or fixing other functional parts.

Abstract: A water meter includes a metal housing which is connectable with a connecting housing through which the water passes and which is disposed in a water pipeline. A plastic measurement insert includes a channel ring upper part, a channel ring lower part and an unpeller mounted therebetween. The metal housing presses the plastic measurement insert onto an outlet opening of the connecting housing. Said plastic measurement insert is seated with its lower edge on a gasket on an opening surrounding the connecting housing to thereby form a seal.

Abstract: A combination water meter comprises a main meter which can be connected to a water main for determining larger amounts of water flow and to an auxiliary meter which is disposed in a bypass conduit for determining smaller amounts of water flow. An on-off valve insert, which opens the passageway through the water main when a specified pressure is reached, is disposed in series with the measurement insert of the main meter, and the measurement insert of the main meter as well as the auxiliary meter are disposed in a housing having a partition which divides the housing into an upstream chamber and a downstream chamber and has an opening between the two. The lid of the housing and the inserts are connected in such a manner that they can be dismantled as a unit. The partition is fastened to and preferably integrally molded with the lid and sealed with respect to the housing by means of a gasket.

Abstract: A reversing valve for a combination meter, including a closure element, movable in the axial direction, which is provided with a cylindrical closure ring which in the closed position of the reversing valve covers radially outwardly directed valve openings, and having at least one channel extending essentially axially associated therewith, which channel is closed in the closed position though already after slight shifting of the closure element in the direction of its open position communicates the working chamber of a hydraulic adjustment member with the main flow. The working chamber additionally has a presettable opening which is always open in the direction of the auxiliary flow or total flow. The effective-pressure-cross section of the closure element is suddenly enlarged inwardly during opening, and is reduced in a sudden manner during closing, by having the main flow act on the working chamber.