| 摘要 |
PURPOSE:To obtain a predetermined mixing ratio, by providing a transmission flowmeter to the pipeline of a main fluid, and opening and closing the solenoid valve provided to the pipeline of the other fluid by a timer operated only for a preset time at every constant count obtained from the transmission pulse of said flowmeter. CONSTITUTION:A counter 21 integrates the transmission pulse of the transmission flowmeter 3 provided to the pipeline 2 of a main fluid to issue an operation order at every constant number while timers 22, 23 operate for a set time by the operation order from the counter 21. Further, solenoid valves 8, 15 directly connecting constant flow pumps 7, 14 and operated by the timers 22, 23 are provided to pipeline 10, 17 of the other fluids. By opening and closing the solenoid valves 8, 15, other fluids can be injected in the pipeline 2 of the main fluid from the pipelines 10, 17 of the other fluids and, by this method, a predetermined mixing ratio can be obtained and the injection amount of the other fluids can be simply matched with the variation of the main fluid and an accurate mixing ratio can be obtained. |
