文丘里管

Our company besides produces the above standard throttling gear, but also produces the present domestic ordinary application each kind of special throttle, like wing anemography installment, ring-like throttle type flowmeter, double repeated passage hamlet anemography installment, 1/4 round spray nozzle, segment of orifice, dual orifices, Inner Tibet orifice, fast tube Flow sensor, jack-in low damaged due to pressing flowmeter, against wall wind pressure thief and so on 30 many kinds of varieties, 1000 many kinds of specifications, caliber from DN10-3000mm, pressure from PN0.01-32MPa, temperature from negative 260℃- 550℃.

我公司除生产上述标准节流装置外，还生产目前国内普通应用的各种特殊的节流件，如机翼型测风装置、环状节流式流量计、双重文丘里测风装置、1/4圆喷嘴、圆缺孔板、双重孔板、内藏孔板、均速管流量传感器、插入式低压损流量计、防墙风压取样器等30多种品种，1000多种规格，管径从DN10-3000mm，压力从PN0.01-32MPa，温度从负260℃-正550℃。

After analyzing the performance anduncertainty of the DDPM vortex flowmeter in gas-liquid bubble flows, the vortexflowmeter-Venturi tube combinative method using the vortex flowmeter and the Venturi tube as measuring cells was put forward, the measurement model based on thevortex frequency and the Venturi differential pressure was established, and it showsthat the relative errors of this method for the mass flow measurement of bubble flowsare within±5%. Furthermore, the flowrate and volume void fraction of bubble flowswere obtained using a single DDPM vortex flowmeter through the relationshipbetween the frequency and amplitude of the circumferential DDPM signal, and resultsdemonstrate that the relative errors of the flowrate and volume void fraction of bubbleflows are within±5% and±10% respectively, which indicates the broad applicabilityof this method to large numbers of engineering fields.

通过分析管壁差压式涡街流量计在气液泡状流中的性能和不确定度，提出了以涡街流量计和文丘里管作为测量元件的&涡街—文丘里联合法&，建立了以涡街频率和文丘里差压为被测量的测量模型，该方法对气液泡状流质量流量的测量相对误差可达±5％；通过建立涡街周向管壁差压信号频率和幅度与被测流体的关系，使用单个涡街流量计实现了对气液泡状流流量和体积含气率的双参数测量，该方法对气液泡状流流量和体积含气率的测量相对误差分别为±5％和±10％，可以满足大量工业实际应用的要求。

It is shown though the result that the problem of reverse pressure difference is solved by adopting the Venturi tube with appropriate proportion between intake and throat. Adopting appropriate EGR ratio at different conditions can not only guarantee diesel engine's performance but also decrease the amount of NO.

研究表明，采用带有合适的进、喉口比例尺寸的文丘里管解决了进排压逆差问题，不同工况下采用合适的EGR率保障了柴油机的工作性能，并有效降低了NO的排放。

To overcome the difficulties in measuring the oil-water two-phase flow,the oil-water two-phase flow regime was studied with a horizontal Venturi tube and a model of flow measurement was established.

针对油水两相流的测量难题，利用文丘里管对水平管内油水两相流流型进行了研究。基于差压波动信号，提出了Hilbert-Huang变换与支持向量机相结合的流型识别方法。

The subject of the mechanism-based emulsion formulated based on the theory, the ratio in the emulsion is to use part of the Venturi tube by high-speed water pipes in their place to produce negative pressure to suction up oil ratio of the working principle, and the higher degree of automation systems, the emulsion with the concentration can completely meet the "Coal Mine Safety Regulations" requirements.

本课题在基于乳化液配制机理的理论基础之上，在乳化液配比部分是利用通过文丘里管的高速水流在其喉管处产生负压将油吸上来的工作原理进行配比的，该系统自动化程度较高，所配乳化液浓度完全能够满足《煤矿安全规程》要求。

To overcome the difficulties in measuring the oil-water two-phase flow ,the oil-water two-phase flow regime was studied with a horizontal Venturi tube and a model of flow measurement was established.

针对油水两相流的测量难题，利用文丘里管对水平管内油水两相流流型进行了研究。

In view of high ammonia loss, tail gas washing section is improved. Absorbing ammonia in Venturi tube, first and second washing tower, the concentrated phosphoric acid is pumped to pipe reactor at the neutralization degree of 0.5; all spouts in washing towers are replaced by spiral spouts and equipment anticorrosion is finished. After improvement, the ammonia recovery rate is increased to over 95% from the previous 85%.

由于管式反应器工艺存在氨逸出率高氨损失大的弊端，提出改造尾气洗涤工艺：将用于生产DAP的浓磷酸全部先在文丘里，第一第二洗涤塔吸收氨后，将中和度0.5的浓磷酸洗涤液送管式反应器；各洗涤塔的所有喷嘴改造为不同型号的螺旋喷嘴；并注意解决洗涤设备的防腐问题改造后氨回收率由85%提高到≥95

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。