Metal tube float flowmeter flange type M6 indicator (4-20mA output)

Overview.

LZ series metal tube float flowmeter (also known as metal rotor flowmeter) is a variable area flowmeter, with simple structure, reliable work, wide range of applications, high accuracy, easy installation and so on. The series flowmeter and glass float flowmeter comparison, with high pressure, high temperature, strong sense of security, according to the flow output of 4 ~ 20mA current signal can be used for automatic detection and control, etc.. And can be applied to opaque media and corrosive media flow measurement. The two series are divided into field indication type and field indication with electricity remote transmission type.

Metal tube float flowmeter is composed of measuring tube body, orifice plate and float (cone tube and float) and magnetic conversion instrument. According to the installation method can be divided into vertical basic type, horizontal type; according to the connection method is divided into flange type, thread type and clamp type, which corresponds to the caliber of the flow range and the same basic performance. The series flange vertical type can be lined with PTFE or F46 corrosion resistant type.

The working parameters of this series instrument and its conversion and correction are provided by the instrument calculation software with standard calculation methods to ensure the accuracy and measurement reliability of the instrument.

◆Product execution standard: JB/T6844-2015 (industry standard)

◆General standard of flange: GB/T9115.1-2010 (national standard)

◆Type approval certificate: 2010F449-33

Working principle.

LZ series metal tube float flowmeter for variable area flowmeter, that is, in the vertical measuring tube of the flowmeter, when the fluid flows upward through the tube, the float moves upward, at a certain position the lift force on the float and the float gravity to reach a balance, at this time the float and the orifice plate (or cone tube) between the circulation ring gap area to maintain a certain.

The ring gap area is proportional to the float's rise height, i.e. a certain height of the float represents the size of the flow. When the float moves up and down, the position is transferred to the external indicator in the form of magnetic coupling, so that the pointer of the indicator follows the float movement and indicates the flow rate on the dial. The electric remote transmission type is to indicate the flow rate on the spot with the pointer and then convert the flow rate value into a standard 4-20mA signal accurately through the angular displacement sensor or electric transmission circuit.

椭圆齿轮流量计的指针停到某一位置不动主要原因是浮子流量计的浮子卡住一般因为金属管转子流量计使用中打开闸阀太快，促使浮子飞快往上冲击止动器，导致止动器形变而将浮子卡住。却也不排除因为浮子导向杆与止动环不同心，导致浮子卡住。解决时可将仪表拆下，将形变的止动器取出整形，并查验与导向杆是否共同，如不同心可开展校准，随后将浮子装上，手推式浮子，感觉浮子左右通畅无阻卡即可，此外，在浮子流量计安装时一定要竖直或水准安装，不能倾斜，否则也容易造成卡表并给测量带来偏差。

数据误差大：1．涡街流量计加工安装不符合要求针对竖直安装金属管转子流量计始终保持竖直，倾角不大于20度针对水准安装浮子流量计始终保持水准，倾角不大于20度浮子流量计周边100mm空间不可有铁磁性物体。安装位置要避开闸阀大小头口、泵出口、工艺管线拐弯口等。始终保持前5D后3D直管段的规定。2．液态介质的密度变化较大也是造成偏差较大的一个原因。3．气体介质因为遭受温度压力影响较大，提议选用温压补偿的方法来得到真实的流量。4．因为长期使用及管路振动等多因素造成金属管转子流量计传感磁瓦、指针、配重、转动磁瓦等活动部件松脱，导致偏差较大。