Application of new technology and structure in magnetic flap liquid level gauge

“Magnetic flap level gauge can be used for medium level detection of various towers, tanks, tanks and other equipment. Generally, there are many ways to install the magnetic flap level gauge, and the top-mounted magnetic flap level gauge is a common way. Usually, the top-mounted magnetic flap level gauge is installed in the buried tank, or selected when the container is not suitable for side openings and the side installation space is small.

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Magnetic flap level gauge can be used for medium level detection of various towers, tanks, tanks and other equipment. Generally, there are many ways to install the magnetic flap level gauge, and the top-mounted magnetic flap level gauge is a common way. Usually, the top-mounted magnetic flap level gauge is installed in the buried tank, or selected when the container is not suitable for side openings and the side installation space is small. The float of the top-mounted magnetic flap level gauge is provided with a magnetic float, and the float is provided with a magnetic flap indicator. The magnetic flap indicator and the magnetic float are magnetically coupled. When the position goes up and down, the magnetic float in the buoy also goes up and down, and the permanent magnet steel in the float drives the magnetic flip outside the buoy to turn 180° through magnetic coupling. The flaps are painted with different colors (usually red and white) on each side to indicate the location of the liquid level. Generally, when the liquid level in the container rises, the flap changes from white to red, and when the liquid level in the container drops, the flap changes from red to white, and the red and white junction of the indicator is the actual height of the liquid level in the container .

The buoys, containers and connecting flanges are usually made of metal materials. When the liquid to be measured is corrosive, a lining design is usually required to prevent the liquid to be measured from corroding the buoy or connecting flanges, resulting in production safety accidents. In the existing top-mounted magnetic flap level gauge, the inner lining of the buoy usually adopts a flanging process to form an annular folded part at the end of the buoy close to the container, but it is limited by the shape, size and lining material of the buoy. Due to the influence of size and characteristics, the flanging sealing surface of the folded part cannot be made very large, and the container opening is usually larger than the area covered by the folded part, so the metal surface outside the container opening and the folded part ( Such as the surface of the flange) are connected, so that these metal surfaces are easily corroded, which can easily cause production safety accidents and bring trouble to production.

In response to this problem, Jiwei automation R&D engineers improved the existing lining process and structure on the basis of many tests, and invented a new process and structure of the top-mounted magnetic flap level gauge. , as shown in the figure below, which provides the first connector and the connector liner. The connecting liner has a first connecting port for communicating with the connecting port of the liner, a first sealing portion arranged annularly outward from the first connecting port, a second connecting port for communicating with the container under test, and a second connecting port for communicating with the container to be tested. The connecting port forms a second sealing portion which is annularly arranged outwards. Since the first connecting piece and the connecting liner are provided separately and can be manufactured separately, the first sealing part and the second sealing part can be made large enough to achieve sealing contact between the first sealing part and the folded part of the buoy liner. At the same time, the second sealing part of the connecting liner is used for sealing connection with the container. Therefore, the connection liner can form a completely sealed connection with the buoy liner and the protective cylinder in the container opening, so as to prevent the metal surface of the connection from being corroded, resulting in the occurrence of production safety accidents.

Practice has proved that the new lining process effectively avoids the above problems, greatly improves the reliability of the product, and has won unanimous praise from users.