Flow measuring pipe segment for small-caliber ultrasonic heat meter

Abstract

The invention relates to a flow measuring pipe segment for a small-caliber ultrasonic heat meter, and belongs to the field of sensing technology and flow metering devices. A straight pipe segment is cast by using a copper alloy, and is provided with two energy transducer mounting holes, three reflecting pipe plug mounting holes, a temperature sensor mounting hole, two conduits and a converter mounting base; energy transducers and reflecting pipe plugs are arranged horizontally, and are centered one above another. Ultrasonic waves are reflected for three times by three reflecting pipe plugs from transmission to receiving, so that the flow measuring accuracy of a small-caliber pipeline is increased. The reflecting pipe plugs and energy transducers are sealed by annealed red copper gaskets of specific sizes, so that the sealing performance and the mounting accuracy are ensured. The reflecting pipe plugs and the straight pipe segment are the same in material, and the reflecting pipe plugs can be detached, so that water scales on the surfaces can be cleaned conveniently. The reflecting surface is extremely high in smoothness, so that the reflecting effect is ensured. Protrusion does not exist in a pipe, so that the pressure loss is extremely low. The converter mounting base is positioned above the straight pipe segment, and inclines forwards by 45 degrees, so that convenience is brought to installation, reading, maintenance and management of a converter.

Description

technical field [0001] The invention belongs to the field of sensing technology and flow metering devices, and in particular relates to a small-diameter ultrasonic heat meter flow measuring pipe section. Background technique [0002] The existing ultrasonic heat meter flow sensor is usually composed of a flow measuring pipe section, an ultrasonic transducer and a reflector. According to the arrangement of ultrasonic channels, it can be divided into three types: parallel method, direct transmission method and reflection method. The ultrasonic propagation direction of the parallel method is parallel to the axis of the pipe section (that is, the direction of water flow), and the detected flow velocity is the flow velocity at the position coincident with the sound channel in the water flow section, and does not represent the average velocity in the pipeline. The propagation direction intersects the axis of the pipe section (that is, the direction of water flow) (for example, th...

AI Technical Summary

Problems solved by technology

The composite pipe section is welded by straight pipe sections, transducer mounting holes, and converter mounting seats. The narrow space makes welding difficult, and the geometric deformation during welding will make it difficult for the relative dimensions of each component to meet the positional accuracy requirements. In addition, There are also problems in sealing, pressure resistance, pressure loss, anti-blocking, anti-corrosion and scaling cleaning.

The integrated casting pipe section has simple structure, high pressure bearing capacity, good sealing performance, no welding deformation, and can well ensure the consistency requirements of the measuring pipe section. It is not easy to clean after fouling, which will seriously affect the measurement accuracy, thereby reducing the accuracy of measurement

Images