JPS6286511U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of one embodiment of the present invention;
The figures show an enlarged cross-sectional view of section P in Fig. 1, Fig. A is a front sectional view thereof, Fig. B is a side view thereof, Fig. 3 is a schematic configuration diagram of another embodiment of the present invention, and Fig. 4 is an ultrasonic propagation state diagram in Fig. 3, Fig. 5 is an ultrasonic waveform diagram in Fig. 4, Fig. 6 is a schematic configuration diagram of yet another embodiment of the present invention, and Fig. 7 is a conventional ultrasonic flow rate. FIG. 8 is an enlarged sectional view of the main part of FIG. 7, FIG. 9 is an ultrasonic propagation state diagram of FIG. 7, and FIG. 10 is an ultrasonic waveform diagram of FIG. 9. 1: Measuring tube section, 7, 7A, 7B, 13, 13A
: Blind flange, 12, 12A: Ultrasonic vibrator, 1
4: Concave portion, R ₁ : Combined received wave.

Claims (1)

[Claims for Utility Model Registration] (1) A measurement tube portion formed in a straight tube shape and having an inlet and an outlet for the measurement fluid at both ends thereof, a pair of blind flanges provided at both ends thereof, and An ultrasonic flowmeter characterized by comprising ultrasonic vibrators that are closely attached to the outside of blind flanges and face each other. (2) In the ultrasonic flowmeter described in paragraph 1 of the claims for utility model registration, the ultrasonic waves emitted from the ultrasonic vibrator are reflected within the blind flange to eliminate unnecessary received waves. An ultrasonic flowmeter characterized in that a predetermined thickness difference is provided between the pair of blind flanges in order to provide attenuation with a time difference corresponding to 1/2 wavelength of the frequency.