SU1663442A1 - Magnetic liquid level indicator - Google Patents

Abstract

The invention relates to a measurement technique and can be used to indicate the level of a liquid in closed containers. When the liquid level changes in the monitored tank 1, the level in the measuring tube 2 changes, communicating with the tank 1, in which the float 3 floats with the magnet 4. The magnet 4 interacts with the rods 7 of soft magnetic material fixed on the plates 6 colored uniformly alternating multicolored stripes, and cause them to rotate in a vertical plane coinciding with the plane of the plates 6, at an angle of 90 ± 15 °. The angle of rotation is limited by limiters 8. At the extreme positions, the plates are held by a mass of weights attached to the plates 6. Thus, the orientation of the strips on the plates 6 above and below the liquid level in the tank 1 is different, thereby improving the visual perception contrast of the results measurements. Making the plates 6 flat, their color and limiting the rotation angle to the range of 90 ± 15 ° allows to increase reliability, speed and reduce the size of the indicator. 3 hp f-ly, 3 ill.

Description

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The invention relates to instrument engineering and can be used to indicate the level of a liquid in closed containers.

The purpose of the invention is to increase the reliability of operation, speed and size reduction.

Figures 1 and 2 show the overall structural design of a liquid level indicator; in FIG. 3, view A in FIG. 2; Fig. 4 shows the design of the rotary indicator plates with rods of magnetically soft material attached to them.

The magnetic liquid level indicator consists of a measuring tube 2 connected to a monitored reservoir with a float 3 placed in it with a control magnet 4 and an indicator 5 placed outside the measuring tube, made in the form of a housing in which the indicator plates 6 are arranged vertically from a nonmagnetic material rods 7 of magnetically soft material fixed on them. Plates 6 are installed with the possibility of limited rotation at an angle of 90 °. The stops 8, limiting the rotation of the plates, are fixed in the body of the indicator. On the plates, weights 9 are also secured, with the help of which the plates are held in the extreme positions. The sides of the plates facing the observer are painted with evenly alternating multicolored stripes. The color of the stripes can be, for example, black and white. Other colors can be used, and the number of colors can be more than two. Luminescent paints can be used for better visual perception in low light conditions.

In addition, to imitate the striped color, the plates and their background can be made grooved. The background of the arrangement of the plates has a color coinciding with the plates in one of the extreme positions of the plates, and the pointer body can be displaced relative to the symmetric position in a plane parallel to the axis of the measuring tube.

The liquid level indicator works as follows.

In accordance with the change in the level of the liquid in the controlled reservoir 1, the float 3 is moved inside the measuring tube 2 with the control magnet 4, successively turning (at a 90 ° ± 15 ° angle) indicator plates due to the interaction with the soft magnetic rods 7. In the extreme The positions of the rods 7 are inclined with respect to the dimensional rovR

position, due to which the distance between the ends of the rods and the control magnet 4 is reduced and, thus, the forces of interaction between the rods and the magnet are increased. The rotation of the plates is carried out in a vertical plane coinciding with the plane of location of the plates, and the visual separation of the liquid and gas phases in a controlled reservoir is perceived as a contrasting border of differently directed color strips of the plates above and below the control liquid level. The contrast perception is enhanced by coinciding with one of

positions and not coinciding with the other position of the plate color background. The position of the plates in the extreme (rotated) position is stabilized by the presence of weights 9, creating a holding moment, and stops 8. The optimum angle of rotation is 90 ± 15 °, since in this case not only the reduction of the interaction of the indicator plates with control magnet

but at the same time, the best visual perception of the contrast of the differently directed stripes of the indicator plates above and below the monitored level is ensured (the optimum angle

between the direction of these bands will be 90 °).

Claims (3)

Claim 1. Magnetic liquid level indicator consisting of a rigid measuring tube of a non-magnetic material communicating with a reservoir, in which a float with a magnet is placed, and a pointer made in the form of a non-magnetic casing material attached outside the tank to a measuring tube, in which vertically mounted plates are mounted on the axes with the possibility of their rotation in a vertical plane that coincides with the plane of installation of the plates on which weights and rods of magnetically soft material are fixed, and the restraints of the rotation of the plates rigidly connected to the body, characterized in that increase reliability, speed and size reduction, the front sides of the plates are painted with evenly alternating multi-colored stripes, and the angle of rotation of the plates in the vertical plane limited to 75-105 °. 2. The indicator according to claim 1. Characterized in that the color of the body coincides with the color of the plates in one of the extreme positions of the plates. 3. Indicator according to claim 1, characterized in that the pointer body is displaced relative to the symmetrical position in a plane parallel to the axis of the measuring tube. FIG. 2 Vida Fig.Z