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    • 9. 发明专利
    • Densitometer
    • 密度计
    • JPS58187832A
    • 1983-11-02
    • JP7037682
    • 1982-04-28
    • Hitachi Ltd
    • HAMADA YOSHIYASU
    • G01N1/00G01N7/00
    • G01N7/00
    • PURPOSE:To detect the concentration of a liquid, by sampling a part of a liquid, and obtaining the temperature of the sampled liquid when the generation of gas is started, while reducing the pressure on the liquid. CONSTITUTION:A part of a liquid is sampled from a piping 1 through a by-pass pipe 2, and the pressure on the sampled liquid is reduced by means of a pressure- reducing valve 3. When the pressure is between a pressure P1 and a pressure P2, no gas is generated in the case where the liquid is supercooled. When the pressure drop by means of the pressure-reducing valve 3 is large, a gas is generated from the liquid to lower the liquid level in a tank 4. Therefore, decreasing the pressure-reduction amount by means of the pressure-reducing valve 3 from the time when the liquid level lowers, causes the generated gas to decrease in amount, thereby making it possible to find a point where the liquid level in the tank 4 no longer changes. The liquid level in the tank 4 is sensed by a liquid- level senser 7. Sensing the outlet temperature of the pressure- reducing valve 3 under the state where the liquid level in the tank 4 no longer changes, permits the concentration of the liquid to be obtained from a temperature T2 and the pressure P2. Accordingly, the concentration of the liquid can be detected by obtaining the saturation temperature through the changing of the pressure.
    • 目的:通过对液体的一部分进行取样来检测液体的浓度,并且在开始产生气体时获得采样液体的温度,同时降低对液体的压力。 构成:通过旁通管2从管道1中取出液体的一部分,借助于减压阀3将取样液体的压力降低。当压力在压力P1和压力 压力P2,在液体过冷的情况下不产生气体。 当通过减压阀3的压降较大时,从液体产生气体以降低罐4中的液面。因此,通过减压阀3减小减压量 从液面降低的时刻起,产生的气体量减少,从而可以找到罐4中的液面不再变化的点。 罐4中的液位由液位传感器7感测到。在罐4中的液面不再改变的状态下,检测减压阀3的出口温度,允许液体浓度 从温度T2和压力P2获得。 因此,可以通过改变压力来获得饱和温度来检测液体的浓度。