SU1000768A2 - Level indicator - Google Patents

Description

(54) LEVELER

The invention relates to instrumentation, can be used for analog measurement of liquid level.

According to the main author. St. No. 847054 is known for a level gauge comprising a counterweight, a float connected by a cable with a float wheel made of a dielectric material, provided with a receiving groove for the cable, and a potentiometric transducer whose winding. located in the spiral groove made at the end of the float wheel, whose pitch is equal to the width of the receiving groove made closed.

However, this device does not allow monitoring the critical level of solids in sump and hydrotransport installations.

The purpose of the invention is to expand and use.

This goal is achieved by the fact that the level gauge is provided with an elastic shell attached to the bottom of the float, forming a closed cavity with it, inside which are installed electrical contacts connected to the electronic unit, one of the contacts attached to the bottom of the elastic shell.

Figs. 1 and 2 show the device, a general view, and Figs. 3 shows the structure of an elastic element with electrical contacts placed inside it; in fig. 4 is a section A-A in FIG. 2; in fig. 5 is a section BB in FIG. four.

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The level gauge contains a float 1 connected by a cable 2 to a float wheel 3 made of dielectric 4 and equipped with a receiving groove for cable 2. At the top of the float wheel 3 there is a spiral groove 5 in which the winding of the potentiometric displacement transducer is laid. The gauge also contains a counterweight 6,

Claims (1)

20 connected by cable 7 to the drum 8. The float wheel 3 and drum 8 of the counterweight 6 are located on a common axis 9, on which the bar 10 is mounted, with a fixed 25 pin 11, a dielectric slider 12 and a slider 13 placed on it. A slit 10 is provided with a slit 14, relative to which the sliding slide 12 can move. The stationary contact 11 and the slider 13 of the potentiometer are electrically connected to the electronic unit 15. An elastic shell 16 is attached to the bottom of the float 1, forming a closed cavity with the bottom of the float electric supports 18 are installed by the supports 17, as well as springs 19 and 20. The spring 19 fulfills the function of a guide when two supports 17 move together and provides the opening of contacts 18 with a natural extension of tension 18. Spring 20 is of utmost importance for electrical connection; the connection between the contacts 18 with them. rapprochement. In the cavity of the drum 8 of the counterweight 6, a collector device is installed, including fixed and movable parts. The stationary part 21 is a cylinder made of a dielectric, surrounded by a bearing 22 with rollers. At the end of the stationary part 21 fixed contacts 24 and 25 are reinforced, representing a ring and a circle, respectively, to which the conductors connected to block 15. The movable part of the collector is made in the form of 8 contact brushes 26, rigidly attached to the end of the drum, connected by wires 27, laying along the cable 2, with electrical contacts 18. When the drum rotates and 8 there is a slip of the counter, act-. brushes 26 at fixed contacts 24 to 25, as a result of which an electrical connection between the moving and fixed parts of the removable device is provided. The proposed level gauge works as follows. The liquid level changing by some value moves the float 1 to the appropriate level. At the same time, the drums 8 turn to a certain angle. The slider 12 made of dielectric moves along the slit 14 of the bar 10 and the slider 13 of the potentiometer a conductor with a specific resistivity, laid on the bottom of the spiral groove 5, slides along the spiral groove, thereby changing the resistance between the contacts 11 and 13 of the potentiometer, electrically connected to the electronic input unit that converts this change into the desired electrical signal. The linearity of measuring the level of liquid, and therefore the length of the relative cable 3 of the float, is achieved by making the resistance of the potentiometer spiral proportional to the linear length of the spiral, and the diameter of the cable 3 of the float is equal to the pitch of the spiral. The operation of the device for monitoring the critical level of solid is carried out as follows. When the level of solid reaches its critical value, the bottom of the elastic shell 16 will lie on the solid. Under the force of gravity of the float 1, the supports 17 will come closer, the spring 19 will compress and the contacts 18 will close. The signal of the closed circuit is transmitted further along the wires 27 and the moving fixed part of the collector device to block 15 and further to the control circuits. Due to the proposed set of distinctive features, the expansion of the field of application is provided, since the described device, in addition to measuring the level of the liquid, makes it possible to monitor the presence of a critical level of solid in the container. The invention The level gauge for auth. St. No. 847054, characterized in that, in order to expand the field of use, it is provided with an elastic shell attached to the bottom of the float, forming with it a closed cavity, inside which electrical contacts are connected to the electronic unit, one of the contacts is attached to the bottom of the float, and the other to the bottom of the elastic shell. FR ° ° ° ° ° ° ° L ° o ° o ° o ° o ° o ° o Rig 2 FIG. 15 GV 17 KBlony Fi.1. 25, 1