Magnetic flap level gauges can be used with various types of towers, tanks, tanks, spherical vessels, boilers and other equipment for medium level detection. The electromagnetic damper level gauge can be highly sealed, leak-proof, and suitable for high temperature, high pressure, and corrosion-resistant occasions. It is composed of a glass plate (tube) level gauge, with poor display clarity, easy to break and other defects, and the whole measurement process has no blind areas, clear display, and large measurement range. The magnetic flap level gauge can be used to directly observe the medium level in various containers. It is suitable for liquid level indicators in petroleum, chemical and other industrial fields. The liquid level gauge has a simple structure, intuitive observation, clear, no blockage, no leakage, simple installation and convenient maintenance. The working principle of the magnetic flap level gauge The UHZ magnetic flap level gauge is made into a measuring body, with a dual-color display cylinder, ruler, and so on. Based on the principle of buoyancy, on the top and low flange of the magnetic ball of the main body of the level, the upward instrument of the magnetic ball and transmitter (4-20mA) will move up or down as the liquid level changes, and perform a two-color steering To display the level of the medium. Each cylinder has an axisymmetric structure of two colors. The distance between the two cylinders is 10mm. The red side of the display cylinder represents liquid, and the white display cylinder represents air. In addition to measuring the liquid level, it can also measure the interface of two liquids. second. Factors to consider when choosing
(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, liquid level change speed, etc.
(2). Measurement and control requirements, such as measurement range, measurement (or control) accuracy, display mode, field indication, remote indication, interface with computer, safety and corrosion protection, reliability and ease of construction.
(3). The demagnetization of magnetic materials should also be considered. Demagnetization will cause the level gauge to fail to work normally and may not be able to obtain measurement results. third. The indication of the magnetic flap liquid level indicator is incorrect 1. Judgment method
(1) The container is always running, but the liquid level of the container is always at a certain point. (2) The container increases or decreases the load, and the liquid level of the container remains unchanged. (3) The local level gauge does not match the differential pressure level gauge on the indoor display. 2. Reason
(1) The water in the container rises or falls too fast, that is, the float rises or falls too fast, and the magnetic flip cover has no time to turn over.
(2) The center of gravity of the magnetic baffle is not at the center point. When the maglev rises, the maglev reverses. When the magnetic float rises again, the air flap returns to the original position state, and there is no water level state.
(3) The water in the container contains too many impurities and is adsorbed on the surface of the magnetic float. The magnetic force of the magnetic float decreases, and when the magnetic float rises, the flap cannot rotate. (4) The blockage of the liquid phase pipe of the water is different, so the actual water level in the container rises. The maglev train will not develop with it.
3. Solution
(1) Try not to raise or lower the water level in the container too quickly. (2) The magnetic valve flap of the water level gauge, the center of gravity is not at the center point. The manufacturing quality does not meet the standards and should be replaced.
(3) If the water quality is unqualified, it should be cleaned regularly.
4. Maintenance
(1) There should be no solid impurities and magnetic impurities in the cylinder of the level gauge to avoid jamming and weakening of buoyancy.
(2) According to the medium, the main pipeline can be cleaned regularly to remove impurities in the sediment. (3) When cleaning the level gauge or replacing the float, please open the drain flange. When inserting the magnetic float, please pay attention to the heavy object so that the magnetic end faces upwards and will not turn over. (4) For low-temperature and liquefied gas-specific products, the main body of the level gauge is insulated by a vacuum sheath, so be careful not to damage the sheath during installation and use, so as not to affect the product quality.
Fourth, the display panel is abnormal
reason of failure
(1) The gap between the baffle and the guide rail is unreasonable or too small, resulting in excessive friction and the baffle does not turn over;
(2) The distance between the display panel and the floating bridge is too large, and the driving force of the electromagnetic steel of the float is insufficient, so that the flap will not be reversed;
(3) The electromagnetic steel in the flaps is too small or the magnetic force disappears, resulting in the flaps not turning or turning abnormally; (4) Impurities such as water or dust penetrate into the display panel, making it difficult for the flip to turn; (5) If the environment If the temperature is too low, the medium will freeze and the float will not move. The baffle cannot display the liquid level normally.
5. The local display is normal, but the remote transmission display is abnormal. Reasons for this type of failure
(1) The household glass tube reed switch is fragile, and the reed tube is short-circuited or broken, which may cause abnormal long-distance transmission;
(2) Resistance welding;
(3) The metal contact gap of the reed switch is very small. When the temperature of the medium is too high, the metal foil will expand when heated, and it is easy to produce a sealed state.
(4) The pressure exceeds the rated value, causing damage to the switch.
Sixth, the remote transmission and the electromagnetic damper do not move
Phenomenon 1: The float is stuck, causing the display panel to be incorrect. There are usually the following reasons: (1) After using the float for a period of time, the float may be stuck due to the presence of impurities and cannot rise or fall;
(2) The installation angle of the pontoon is less than 87 degrees, causing tilt to affect the up and down movement of the float. (3) The float is stuck due to magnetic adsorption of iron filings or other pollutants; (4) If the ambient temperature is too low, the medium will freeze and the float will not move. Phenomenon 2: The float is damaged, causing the display panel to be incorrect. There are usually the following reasons: (1) Due to the strength, the design of the float is incorrect, so the float will be recessed and smashed under pressure;
(2) There is no fusion or missing welding at the weld, and the weld cracks when the float is pressed, and the float enters the water; (3) The float is demagnetized due to long use time or long-term high temperature, making it unusable; (4) In the float The electromagnetic steel is loose, causing the float to fail to work.
Post time: 24-11-21