The stainless steel magnetic flap level gauge can be used to detect the medium liquid level of various tower,tank,tank,spherical vessel and boiler.Stainless steel magnetic flap level gauge can achieve high sealing,leakage proof and suitable for high temperature,high pressure,corrosion-resistant occasions.It makes up for the defects of glass plate(tube)liquid level gauge,such as poor clarity,easy to crack,and has no blind area in the whole process measurement,with clear display and wide measurement range.
Compared with other types of liquid level instruments,the safety of stainless steel magnetic flap level gauge has more advantages,because it is the local display of liquid level,which can be realized without relying on other electronic devices,and is stable and reliable with small fluctuation.Now it has been widely used in pressure vessels of thermal power plants:high and low pressure deaerator,raw water heater,heating network heater,high and low pressure of unit Heat exchangers such as heaters and condensers are equipped with such level meters.
The working medium of heat exchanger is easily vaporized liquid,the pressure is from vacuum state to 2.5MPa,and the temperature is from 40℃to 390℃.Therefore,the accuracy of daily maintenance and indication of level gauge plays an important role in the safe operation of pressure vessel.
This paper sorted out the stainless steel magnetic flap level meter related knowledge,let's have a look,hope to help you!
1、Working principle of stainless steel magnetic level gauge
The stainless steel magnetic flap level gauge(also known as magnetic float level gauge)works according to the principle of buoyancy and magnetic coupling.When the liquid level in the measured vessel rises or falls,the float in the main tube of the liquid level gauge also rises and falls.The permanent magnetic steel in the float is transmitted to the field indicator through magnetic coupling,which drives the red and white column to turn 180°when the liquid level rises,the turning column changes from white to red when the liquid level drops,and the red and white boundary of the indicator is the actual high of the medium liquid level in the container So as to realize the liquid level indication.
2、Factors to be considered in selection
1.The measurement object,such as the physical and chemical properties of the measured medium,as well as the working pressure and temperature,installation conditions,the speed of liquid level change,etc.
2.Measurement and control requirements,such as measurement range,measurement(or control)accuracy,display mode,on-site indication,remote indication,interface with computer,safety and corrosion protection,reliability and construction convenience.
3.The demagnetization of magnetic materials should also be considered.Demagnetization causes the level gauge not to work normally and the measurement results may be inaccurate.
3、Characteristics of stainless steel magnetic level gauge
1.The measurement range is large,not limited by the height of the container.
2.The indication is novel,the reading is intuitive and eye-catching.The direction of the indicator can be changed according to the user's needs.
3.Suitable for the measurement of liquid level and interface in the container.In addition to on-site indication,it can also be equipped with remote transmitter,alarm switch and complete detection function.
4.Simple structure,convenient installation,convenient maintenance,corrosion resistance,no power supply and explosion-proof.
4、Inaccurate indication of stainless steel magnetic level gauge
(1)The container is always running,but the liquid level of the container always stops at a certain point.
(2)When the load of the container increases or decreases,the liquid level of the container remains unchanged.
(3)The local level gauge does not match the pressure difference level gauge on the indoor display screen.
(1)The water in the container rises or falls too fast,that is to say,the float rises or falls too fast,and the magnetic flap has no time to turn.
(2)The center of gravity of the magnetic flap is not at the central point.When the maglev rises,it will turn over with the maglev.When the maglev rises again,the flap will return to its original position,and there is no water level.
(3)There are too many impurities in the water in the container,which are adsorbed on the surface of maglev.As a result,the magnetic levitation decreases,and when the maglev rises,it can not drive the turnover plate to rotate.
(4)The blockage of the liquid phase pipe of water is different,which makes the actual water level in the container rise.Maglev does not rise with it.
(1)Try to make the water level in the container rise or fall too fast.
(2)Magnetic flap of water level gauge,the center of gravity is not in the center point.If the manufacturing quality does not meet the standard,it should be replaced.
(3)If the water quality is unqualified,it should be washed regularly.
(1)There should be no solid impurities and magnetic impurities in the cylinder of the liquid level meter,so as to avoid jamming the float and weakening the buoyancy.
(2)According to the medium condition,the main pipe can be cleaned regularly to remove the sediment impurities in the pipe.
(3)After cleaning the level gauge or changing the float,open the drain flange.When installing the magnetic float,pay attention to the heavy end with magnetic end upward,and do not install upside down.
(4)For low-temperature and special LPG products,the main body of the liquid level gauge is insulated by vacuum jacket.Pay attention not to damage the jacket during installation and use,so as to avoid affecting the product quality.