Orifice
plate flowmeter is a high range ratio differential pressure flow device
composed of a standard orifice plate and a multi-parameter differential
pressure transmitter (or differential pressure transmitter, temperature
transmitter, and pressure transmitter). The throttling device in the fluid flow
pipeline that is filled with the pipeline locally contracts near the throttling
component, increases the flow rate, and generates a static pressure difference
on both upstream and downstream sides (as shown in Figure 1). Under the
condition that relevant parameters are known, the relationship between
differential pressure and flow rate can be inferred d on the principle of
flow continuity and Bernoulli equation (the larger the flow rate, the greater
the pressure difference generated) to obtain the flow rate.
进口孔板流量计 Main
features
节流装置结构简单、牢固,性能稳定可靠,使用期限长 The
throttling device has a simple and firm structure, stable and reliable
performance, and a long service life进口孔板流量计2.jpg
应用范围广,全部单相流皆可测量,部分混相流亦可应用 Wide
application range, all single-phase flows can be measured, and some mixed phase
flows can also be applied
标准型节流装置无须实流校准,即可投用 The
standard throttling device can be put into use without actual flow calibration
安装更简单,无须引压管,可直接接差压变送器和压力变送器
Installation is simpler, without the need for pressure pipes, and can be
directly connected to differential pressure transmitters and pressure
transmitters
高精度,完善的自诊断功能 High
precision and comprehensive self-diagnosis function
智能孔板流量计智能孔板流量计其量程可自编程调整 The
range of the intelligent orifice flowmeter can be self programmable and
adjusted
智能孔板流量计可同时显示累计流量、瞬时流量、压力、温度 The
intelligent orifice flowmeter can simultaneously display cumulative flow rate,
instantaneous flow rate, pressure, and temperature
具有在线、动态全补偿功能外,智能孔板流量计还具有自诊断、自行设定量程 In
addition to online and dynamic full compensation functions, the intelligent
orifice flowmeter also has self-diagnosis and self setting range
配有多种通讯接口
Equipped with multiple communication interfaces
:RETZ/我们一直致力于流体控制和测控领域的持续创新,始于2005……进口孔板流量计作为过程自动化控制系统的检测仪表和测量物料数量的量表,被广泛适用于煤炭、化工、交通、建筑、轻纺、食品、医药、农业、环境保护各个领域
进口孔板流量计原理及用途Principle and purpose
孔板流量计是将标准孔板与多参量差压变送器(或差压变送、温度变送器及压力变送器)配套组成的高量程比差压流量,充满管进口孔板流量计原理及用途.jpg道的流体流程管道内的节流装置,在节流件附近边成局部收缩,流速增加,在其上、下游两侧产生静压力差(如图)。在已知有关参数的条件下,根据流动连续件原理和伯努利方程可以推异出辨压与流量之间的关系(流量愈大,所产生的压差愈大)而求得流量。
Orifice plate flowmeter is a high range ratio differential pressure flow device composed of a standard orifice plate and a multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter). The throttling device in the fluid flow pipeline that is filled with the pipeline locally contracts near the throttling component, increases the flow rate, and generates a static pressure difference on both upstream and downstream sides (as shown in Figure 1). Under the condition that relevant parameters are known, the relationship between differential pressure and flow rate can be inferredd on the principle of
flow continuity and Bernoulli equation (the larger the flow rate, the greater
the pressure difference generated) to obtain the flow rate.
进口孔板流量计 Main features
节流装置结构简单、牢固,性能稳定可靠,使用期限长 The throttling device has a simple and firm structure, stable and reliable performance, and a long service life进口孔板流量计2.jpg
应用范围广,全部单相流皆可测量,部分混相流亦可应用 Wide application range, all single-phase flows can be measured, and some mixed phase flows can also be applied
标准型节流装置无须实流校准,即可投用 The standard throttling device can be put into use without actual flow calibration
安装更简单,无须引压管,可直接接差压变送器和压力变送器 Installation is simpler, without the need for pressure pipes, and can be directly connected to differential pressure transmitters and pressure transmitters
采用进口单晶硅智能差压传感器 Adopting imported monocrystalline silicon intelligent differential pressure sensor
高精度,完善的自诊断功能 High precision and comprehensive self-diagnosis function
智能孔板流量计智能孔板流量计其量程可自编程调整 The range of the intelligent orifice flowmeter can be self programmable and adjusted
智能孔板流量计可同时显示累计流量、瞬时流量、压力、温度 The intelligent orifice flowmeter can simultaneously display cumulative flow rate, instantaneous flow rate, pressure, and temperature
具有在线、动态全补偿功能外,智能孔板流量计还具有自诊断、自行设定量程 In addition to online and dynamic full compensation functions, the intelligent orifice flowmeter also has self-diagnosis and self setting range
配有多种通讯接口 Equipped with multiple communication interfaces
稳定性高 High stability
量程范围宽、大于10:1 Wide range, greater than 10:1
进口孔板流量计技术参数 Technical parameter
节流件名称
适用管道
适用直径比B(d/D)
应用特点
流出系数不确定度Ec%
设计标准
(DN mm)
50-500
0.2-0.75
适用于清洁介质其中GD结构适合高温高压条件下流量的测量
0.6-0.75%
ISO5167
环室式
50-500
0.2-0.75
GB/T2624-93
角接取压标准孔板
夹紧环式
50-500
0.2-0.75
易于清除污物,可用于不太清洁流体流量的测量
斜钻孔式
450-1000(3000)
0.2-0.75
法兰取压标准孔板
50-1000
0.2-0.75
易于清除污物,适用于各种介质
0.6-0.75%
ISO5167
径距取压标准孔板
50-1000
0.2-0.75
GB/T2624-93
角接取压标准喷嘴
50-500
0.3-0.8
压损小,寿命长,尤其适用于蒸汽流量测量
0.8-1.2%
ISO5167
(ISA1932喷嘴)
GB/T2624-93
50-630
0.2-0.8
压损小寿命长,LGP型长径喷嘴组件适合高参数水和蒸汽流量测量
2.00%
ISO5167
长径喷嘴
GB/T2624-93
机械加工式
100-800
0.2-0.8
压力损失小,所需直管段小于孔板、喷嘴
1.00%
ISO5167
经典文丘利管
粗焊铁板式
200-1200(2000)
0.4-0.7
1.50%
GB/T2624-93
65-500
0.316-0.77
同上
1.2-1.75%
ISO5167
文丘利喷嘴
GB/T2624-93
1/4圆孔板
25-150
0.245-0.6
适用于低雷诺数
2.0-2.5%
DIN BS
锥形入口孔板
25-250
0.1-0.316
同上
2.00%
BS
圆缺孔板
50-1500
0.32-0.8
适用于赃污,有气泡析出或含有固体微粒的流体测量。
1.50%
DIN
偏心孔板
100-1000
0.46-0.84
1-2%
ASME
小孔板
12.5-40
0.2-0.75
适用于小管道流量测量
0.75%
ASME
透镜式孔板
12.5-150
0.2-0.75
适用于高压常温小管道流量测量
0.6-0.75%
ISO5167ASME
端头孔板
大于等于15
0.2-0.62
1.5-2.0%
双重孔板
25-400
0.2-0.8
适用于大流量测量
限流孔板