JPS6199018U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 shows a schematic configuration diagram of a vortex detection section to which the present invention is applied, FIG. Fig. 2A is an explanatory diagram of the output signal obtained when using the diaphragm shown in Fig. 2;
The figure is a perspective view of the upper housing, FIG. 4 is a perspective view of the lower housing, FIG. Figures 6 and 7 are schematic configuration diagrams of the vortex detection section, Figure 8 is a plan view of the vibrator, Figure 9 is a diagram of the vibration state of the diaphragm, and Figure 10 is a diagram of the vibration plate shown in Figure 9. FIG. 4 is an explanatory diagram of an output signal obtained when 2: Vortex generator, 21: Upper housing, 22:
lower housing, 23: vibrator, 24: diaphragm,
25: Vibration chamber, 26, 27: Mountain-shaped inclined surface, 29
A, 29B: Spun band, 30, 31, 32,
33, 35, 36, 37, 38: Concave groove, 41: Flat surface.

Claims (1)

[Claims for Utility Model Registration] 1. A diaphragm that vibrates in response to pressure fluctuations that occur alternately near both sides of a Karman vortex generator inserted into a fluid flow, and a line containing the center of gravity of this diaphragm. In the Karman vortex flowmeter, which has a pair of span bands that hold the diaphragm on symmetrical axes and cause torsional vibration, the diaphragm is torsionally reduced in width from the vibration axis toward the tip, so that the width of the diaphragm is gradually reduced toward the tip. A Karman vortex flowmeter characterized by its trapezoidal shape. 2. The Karman vortex flowmeter according to claim 1, wherein the diaphragm has an arcuate connection portion with the span band to avoid concentration of stress.