US 6,644,130 B2Granted

Ultrasonic flow meter having a tubular elastic transducer holding unit

AssigneeSurpass Industry Co., Ltd.

InventorsHiroshi Imai, Akira Takada

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Abstract

The ultrasonic flow meter of the present invention comprising a measuring pipe through which liquid flows, and two measuring units provided at an interval in the lengthwise direction on measuring pipe. A tightly adhered tube having elasticity is attached to an attaching indentation formed in the measuring pipe over the peripheral direction, and its inner peripheral surface is tightly adhered to the outer peripheral surface of measuring pipe. A transducer is arranged on the outer peripheral surface of tightly adhered tube in the state in which it is pressed against the outer peripheral surface of the tightly adhered tube. In this ultrasonic flow meter, the transmission of vibrations between the transducer and fluid inside the measuring pipe can be carried out uniformly.

Claims12

Dependent claims

An ultrasonic flow meter comprising:

a measuring pipe through which liquid flows;
and
two measuring units provided on said measuring pipe at an interval in its lengthwise direction, and which measures flow volume by measuring the flow rate of said liquid from the difference in propagation times of ultrasonic waves in both directions between these measuring units;
wherein,
said measuring units respectively have a tubular tightly adhered tube of a prescribed thickness having an inner diameter which is smaller than an outer diameter of said measuring pipe;
the tubular tightly adhered tube is unitedly made of material having elasticity attached in the state in which it is tightly adhered to an outer peripheral surface of said measuring pipe, and a transducer maintained in the state in which it is pressed against the outer peripheral surface of said tightly adhered tube.

3 more elements

Dependencies are inferred from the claim text.