Partition plate securement for an ultrasonic flow meter

摘要

An ultrasonic flow rate measuring device includes a flow path, a partition plate that is inserted from an aperture to partition the flow path into plural sections, an ultrasound transmission body, plural ultrasonic transducers that are provided in positions facing a bottom plate such that an ultrasonic wave transmitted from one of the ultrasonic transducers through the ultrasound transmission body is reflected by the bottom plate and received by the other ultrasonic transducer, a measurement circuit that measures an ultrasonic propagation time between the plurality of the ultrasonic transducers; and a calculation circuit that obtains a flow rate of the target fluid based on a signal from the measurement circuit.

主权项

1. An ultrasonic flow rate measuring device comprising:
a flow path in which a target fluid flows, the flow path including a first sidewall that is provided along a flow direction of the target fluid, a second sidewall that is disposed facing the first sidewall, a bottom plate that extends from a bottom of the first sidewall to a bottom of the second sidewall, an upper wall unit that connects an upper portion of the first sidewall and an upper portion of the second sidewall, and one aperture that is provided in the upper wall unit facing the bottom plate; a partition plate that is inserted from the aperture to partition the flow path into a plurality of sections; an ultrasound transmission body that covers the aperture; a plurality of ultrasonic transducers that are provided in positions facing the bottom plate such that an ultrasonic wave transmitted from one of the ultrasonic transducers through the ultrasound transmission body is reflected by the bottom plate and received by the other ultrasonic transducer; a measurement circuit that measures an ultrasonic propagation time between the plurality of the ultrasonic transducers; and a calculation circuit that obtains a flow rate of the target fluid based on a signal from the measurement circuit, wherein the partition plate includes upper protrusions formed only at both side ends in an upper portion of the partition plate, and lower protrusions formed in plural positions at a lower end of the partition plate, first insertion grooves, in which the upper protrusions are inserted, are provided at the both sides of the aperture in the flow path direction, and second insertion grooves, in which the lower protrusions are inserted, are provided in the bottom plate.