SU972236A1 - Loose material level indicator - Google Patents

Description

(54) BULK MATERIALS LEVEL

one

This invention relates to the H3MepHTevibHofl technique and can be used to measure the level of various bulk materials.

Devices are known based on the principle of a lot, where a load connected by a cable to a cable tension converter into an electrical signal 1 serves as a sensitive element.

The disadvantage of these devices is the complexity of the measurement process.

Closest to the present invention is a level gauge containing a sensing element, made in the form of a measuring chain 2.

The disadvantage of the known level gauge is the presence of complex mechanical devices for balancing a tared chain, and as a result, measurement reliability is insufficient.

The purpose of the invention is to increase the reliability of measurement.

The goal is achieved by the fact that the level gauge is equipped with a vertical guide rod made of non-magnetic material with inductance coils fixed to it and equidistant from one another, and the measuring chain is made in the form of solenoids as much as the coil inductance equidistant from each other from each other, mechanically interconnected by flexible connections and mounted on the rod with the possibility of movement, while the solenoid windings are connected to an alternating current source, and the terminals of the coils are ind ktivnosti connected to the display device.

The drawing shows the gauge.

Claims (2)

The device includes a chain of 1 sensing elements, each of which is a solenoid 2. Chain links are equidistant from each other and interconnected by flexible connections 3. 15 Chain links can freely move along the guide rod 4, which is made of a nonmagnetic material and has evenly spaced grooves according to the number of solenoids 2 in which the windings of the inductance coils 5 are laid. The chain of solenoids is connected to the upper end of the electromagnetic clutch 6. The windings of the solenoids 2 are connected to an alternating current source 7. The windings of the inductance coils 5 are connected to the inputs of the display 8. The measuring chain together with the guide rod is installed in the tank with bulk material 9. The device works as follows. As the tank 9 is filled with bulk material, the lower links of the chain 1 below the level of the bulk material are fixed by it in the initial position, i.e. The solenoids 2 are located along the guide rod 4 between the coils 5. At the time of the measurement, alternating voltage is applied to the windings of the solenoids, causing a variable magnetic field to form around them. At the same time, electromagnetic clutch 6 is turned on, which moves the point of suspension of chain 1 down from position Si to position 82 to a distance equal to half the gap between the rolls 5. At the same time, those solenoids that are below the level of bulk material remain stationary relative to the guide rod 4 and their magnetic fields do not affect the windings of the coils 5. The solenoids, which are above the level of the bulk material, move down with the suspension point and their magnetic fields become coupled with the coils 5, we find schihs leaching layer of particulate material. Variable emf is induced in the coils. As a result, the indicator device 8 receives continuous electrical signals from the coils, which are located above the level of the bulk material, but do not receive any coils located below the level. The indicator device may be performed in different ways. In the simplest case, this can be a series of signal lamps, each of which corresponds to a specific inductance 5 mounted on rod 4. By knowing the levels at which the coils on rod 4 are fixed, you can judge the level of bulk material in the tank 9 BACKGROUND OF THE INVENTION A loose material level gauge comprising a sensitive element in the form of a vertical measuring chain, an alternating current source and an indication device, characterized in that, in order to increase the reliability of measuring It is equipped with a vertical guide rod made of non-magnetic material with inductors attached to it and equally spaced from one another, and the measuring chain is made in the form of solenoids, as much as inductors equally spaced from each other, mechanically connected between flexible connections and mounted on the rod with the possibility of movement, with the solenoid windings connected to the AC source, and the leads of the inductance coils connected to the display device. Sources of information taken into account in the examination 1. The author's certificate of the USSR. Cho 609058, cl. G 01 F 23/00, 1975. 2. USSR author's certificate number 438881, cl. G 01 F 23/14, 1972 (prototype).