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Nozzle flowmeter

喷嘴的测量是依据流体力学的节流原理。当充满管道的流体流经管道内的喷嘴时,流束将在喷嘴处形成局部收缩,从而使流速加快,静压力降低。于是在喷嘴前后便产生了压力降或叫压差。介质流动的流量愈大,在喷嘴前后产生的压差也就愈大。根据压差的平方根与流量成正比的关系,利用差压仪表测量压差来确定流体流量。The measurement of nozzle is based on the throttling principle of fluid mechanics. When the fluid full of ···

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喷嘴的测量是依据流体力学的节流原理。当充满管道的流体流经管道内的喷嘴时,流束将在喷嘴处形成局部收缩,从而使流速加快,静压力降低。于是在喷嘴前后便产生了压力降或叫压差。介质流动的流量愈大,在喷嘴前后产生的压差也就愈大。根据压差的平方根与流量成正比的关系,利用差压仪表测量压差来确定流体流量。

The measurement of nozzle is based on the throttling principle of fluid mechanics. When the fluid full of the pipe flows through the nozzle in the pipe, the beam will form a local contraction at the nozzle, which will accelerate the flow rate and reduce the static pressure. So there is a pressure drop or differential pressure before and after the nozzle. The greater the flow rate of the medium flow, the greater the pressure difference before and after the nozzle. According to the relationship between the square root of the pressure difference and the flow rate, the differential pressure instrument is used to measure the pressure difference to determine the fluid flow rate.

●标准喷嘴(ISA1932喷嘴)

● standard nozzle (isa1932 nozzle)

适用介质;适合高温高压蒸汽和水、也可用于各种气体、液体;

Suitable medium; suitable for high temperature and high pressure steam and water, also can be used for various gases and liquids;

公称口径:DN50—DN500 (DN>500亦可设计、生产);

Nominal diameter: dn50-dn500 (DN > 500 can also be designed and produced);

工作压力:≦42MPa;

Working pressure: ≤ 42MPa;

工作温度:-50℃ — 650℃;

Working temperature: - 50 ℃ - 650 ℃;

取压方式:角接取压;

Pressure measurement method: angular connection pressure measurement;

喷嘴安装方式:管道式、夹持式、焊接式;

Nozzle installation mode: pipe type, clamping type and welding type;

执行标准:IS05167;GB/T2624;

Executive standard: is05167; GB / t2624;

精确度:符合标准±1.0 %;

Accuracy: ± 1.0% of the standard;

材质:法兰或夹持件:按介质温度可选碳钢、合金钢;不锈钢等;

Material: flange or clamp: carbon steel, alloy steel, stainless steel, etc. can be selected according to medium temperature;

喷嘴:不锈钢304;316等。

Nozzle: stainless steel 304; 316, etc.

●长径喷嘴

Long diameter nozzle

适用介质;特别适合高温高压蒸汽和水、也可用于各种气体、液体;

Suitable medium; especially suitable for high temperature and high pressure steam and water, also can be used for various gases and liquids;

公称口径:DN50—DN500;

Nominal diameter: dn50-dn500;

工作压力:≦42MPa;

Working pressure: ≤ 42MPa;

工作温度:-50℃ - 650℃;

Working temperature: - 50 ℃ - 650 ℃;

取压方式:径距(D-D/2)取压;

Pressure measuring method: diameter distance (D-D / 2);

喷嘴件安装方式:配带并焊接上、下游管段再按径距(D-D/2)设置取压孔;

Installation method of nozzle parts: the upstream and downstream pipe sections are equipped and welded, and then the pressure tapping holes are set according to the diameter distance (D-D / 2);

执行标准:IS05167; GB/T2624;

Executive standard: is05167; GB / t2624;

精确度:符合标准±2.0 %;

Accuracy: ± 2.0% of the standard;

材质:上、下游管段按介质温度可选碳钢、合金钢;不锈钢等;

Material: carbon steel, alloy steel, stainless steel, etc. can be selected for upstream and downstream pipe sections according to medium temperature;

喷 嘴:不锈钢304; 316等。

Nozzle: stainless steel 304; 316, etc.

标准喷嘴

Standard nozzle

(ISA1932喷嘴)

(isa1932 nozzle)

喷嘴流量计产品外形尺寸

caliberL¢B
DN50-DN150200mmAccording to the requirements of pipe size and pressure level provided by customers.
DN200-DN250220mm
DN300-DN350240mm
DN400-DN450260mm
DN500300mm


●Long diameter nozzle

喷嘴流量计产品外形尺寸


modelexplain

Throttling device (nozzle flowmeter)

Code structural style

IStandard nozzle

LLong diameter nozzle

CodeNominal pressure(MPa)

2.02.0

5.05.0

1111

2626

4242

Codecaliber

50-500DN50-DN500

Codemedium

1liquid

2Gas

3steam

CodeForm of compensation

NWithout temperature and pressure compensation

POutput with pressure compensation

TOutput with temperature compensation

CodeRange of transmitter differential pressure range

0Micro differential pressure range

1Low differential pressure range

2Medium differential pressure range

3High differential pressure range

CodeRange of transmitter differential pressure range

0Micro differential pressure range

1Low differential pressure range

2Medium differential pressure range

3High differential pressure range

CodeWith field display or not

WThrottle sensor

LIntelligent throttling device (flowmeter)

1、尽可能避免测量管内变成负压;

1. Avoid negative pressure in the measuring tube as far as possible;

2、避免附近有大电机、大变压器等,以免引起喷嘴场干扰;

2. Avoid large motor and transformer nearby to avoid interference of nozzle field;

3、选择震动小的场所,特别对一体型仪表;

3. Choose the place with small vibration, especially for the integrated instrument;

4、易于实现传感器单独接地的场所;

4. It is easy to realize sensor grounding separately;

5、尽可能避免受阳光直照;

5. Avoid direct sunlight as much as possible;

6、尽可能避开周围环境有高浓度腐蚀性气体;

6. Avoid corrosive gas with high concentration in the surrounding environment as far as possible;

7、尽量满足计算书要求的前后直管段。

7. Try to meet the requirements of the calculation sheet before and after the straight pipe section.

喷嘴流量计安装示意图

喷嘴流量计注意事项

1、可水平、垂直或倾斜安装,应保证管内充满介质;

1. It can be installed horizontally, vertically or obliquely, and the pipe should be filled with medium;

2、节流装置前,后直管段应是直的,无肉眼可见弯曲,同时应是“圆的”,内壁应洁净,无凹坑与沉淀物;

2. Before and after the throttling device, the straight pipe section should be straight without visible bending, and should be "round". The inner wall should be clean and free of pits and sediments;

3、直管段长度要求及节流装置安装应符合GB/T26224—93有关规定;

3. The length requirements of straight pipe section and installation of throttling device shall comply with relevant provisions of GB / t26224-93;

4、引压管路安装应符合标准规定的规范。

4. The installation of pressure pipeline should conform to the standard.



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