SU371450A1 - LIQUID LEVEL INDICATOR - Google Patents

Description

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The invention relates to the chemical industry, and may also find application in the indication of the levels of liquids with low densities at high pressures.

Known liquid level indicators containing a float, the density of which exceeds the density of the medium, and the compensating device, are complex in design, not sufficiently accurate and reliable.

In the proposed indicator, the compensating device is made in the form of an additional float connected by a rod with the main one. An additional float is placed in a vessel with a liquid whose density exceeds the average density of the main float.

The drawing shows the indicator.

The bottom float 1 and the top 2 are interconnected by a rod 3. The bottom float is completely immersed in the vessel 4 with heavy liquid 5. The vessel 4 is rigidly connected to the body 6 by the perforated plate 7.. .

The upper float 2 can be in the medium 8 of gas or controlled fluid 9, depending on its levels, conventionally designated 10 and //.

The display system is as follows.

Permanent magnets 12 are pressed into the upper float, the magnetic field of which, in the event of a float rising with an increase in level, affects the magnetically controlled

contacts 13. Case 6 is made of a material having a low magnetic permeability (non-magnetic stainless steel, titanium, etc.).

Display system can be performed

also on the basis of a change in the inductance of the coil 14 located on the housing 6. In this case, a ring 15 of ferromagnetic material is pressed into the upper float, or the float itself is made of a ferromagnetic material.

In the presence of a controlled fluid, the upper float 2 is affected by a buoyancy force equal to the weight of the controlled fluid 8 displaced by the upper float 2. On

The BOTTOM float / also has an ejection force from the heavy liquid side.

When the liquid level indicator is operating, the lower float / can be moved between the intermediate vessel 4 and its lid. In this case, the float (always fully immersed in a heavy liquid), hence the ejection force acting on it from the side of a heavy liquid, does not depend on its position and is constant. The volume of the lower float is chosen so that when the controlled environment in the object indykatb {) urbvn occupied a position corresponding to the level of the controlled fluid, i.e., had a positive buoyancy.

In the absence of a controlled medium in the object, the weight of the entire float becomes greater than the buoyancy force, the actual bottom float on the side of the heavy liquid, and the level indicator occupies the lowest position.

Subject invention

A liquid level indicator containing iOAAd., Whose njiOtHoctfa exceeds the density of the medium and a compensating device, characterized in that, in order to simplify the design and increase reliability and accuracy, in it the compensating device is made in the form of an additional float connected in a vessel with a liquid whose density exceeds the average density of the main float.

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