JPS5698617A - Flow meter - Google Patents

Abstract

PURPOSE: To measure precisely comprehensive flow, by taking in the cylinder a ball whose diameter is a little smaller than the inner diameter of the cylinder and whose specific gravity is almost equal to that of the fluid to be measured, and by changing over the direction of the fluid every time the ball intercepts the light path between a pair of luminous element and light receiving element that are accommodated at both ends of the cylinder.

CONSTITUTION: In the pipe straight part 21 of the cylinder 20, a ball 26, whose diameter is a little smaller than the inner diameter of it and whose specific gravity is almost equal to that of the fluid to be measured, is provided. A pair of the luminous element 27 and the light receiving element 28 are accommodated at both ends of it. When the solenoid 33 of the two ways change-over valve 24 is demagnetized, the fluid from the fluid source 38 is transferred to fluid consuming part 37 via part 36b, 24b, fitting 23b, 23a and, removing the ball 26 to the direction shown by an arrow, intercepts the light path of sensing apparatuses provided at left-hand sides. In accordance with it, an electric current is applied to the solenoid 33 from the control apparatus 29, and flow path is changed over reversely. Comprehensive flow is measured precisely by counting the numbers of change-over by means of the counter 31.

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