SU877341A1 - Jigging bed inductive gaure - Google Patents

Description

(54) INDUCTIVE LEVEL DEPLOYMENT

BEDS

Claims (2)

The invention relates to the measurement of the level and amplitude of a jigging bed and can be applied in the coke-chemical metallurgical, concentrating industry for measuring and controlling the operating modes of the jigging machine. The following ypoBHOviep is known, which contains a base with a magnet, a guide tube in which a driven magnet is connected, connected with a cable to a calibrated mechanically short drive drive connected to an output converter, a level control mechanism. In a known level gauge, the leading magnet mounted on the float must create a strong magnetic field, and the smelters need to make a significant amount, only in this case can you overcome friction in the kinematic pairs of the gearbox and the mechanical drive without breaking the magnetic link n driven by magnets. However, the magnetic coupling of the master and the sensing element has low accuracy and reliability. Closest to the proposed one is an inductive tracking level gauge, containing a float, made of a magnetic material, directing a nonmagnetic tube with a sleeve in it, a core transformer coil, which is connected to a BxdhoM tracking system , shape. rover of the average level fa. A disadvantage of the known inductive vnog following gauge is that it does not measure the level of the compacted layer. (Technology, and the average for the period of oscillation is the level that is affected by the amplitude and pulsation of the jigging bed., The purpose of the invention is to increase the accuracy of the measurement of "level and amplitude. Frightened by the PJ jigging bed. In order to achieve the set, the pfedlag-up inductive follow-up level of the jigging bed was set, including a non-magnetic abrasive-resistant pipe that guided it, a circular float made of magnetic material, a transformer coil with a heart suspended on a cable inside a pipe, a tracking device with a photosensitive amplifier, an intermediate-level driver, is additionally equipped with a phase-sensitive detector, an inverter and two adders, with the output of the DFT transformer coil connected to the input of the phase-sensitive detector, which is directly connected to one of which itself, which is directly connected to one of its components. the first) adder, the second transducer of the phase-sensitive detector and the output of the intermediate level driver are connected to the inputs of the second adder. In the drawing, a schematic diagram of the jurydata of the inductance level, the measure of the jigging bed, is shown. The inductive servo level gauge contains an annular float made of magnetic material 1, mounted on a guide non-magnetic abrasive resistant pipe 2, the receiving element in the form of a diffraction coil with a cable 3 suspended on cable 4 inside the pipe, the following electric drive consisting of a phase-sensitive amplifier 5, engine 6, gearbox 7 and drum 8; shaper average level 9, phase-sensitive detector Yu, inverter 1, first ammeter of tulsations 12 second adder at exactly the same compressed layer 13. Output of the diffusion transformer coil 3. Connected to the input of the phase-sensitive amplifier 5 and the input of the phase-sensitive detector Yu. reversing motor b, the shaft of which is mechanically connected by means of a gearbox 7 to a drum 8 on which a cable is wound 4. The output of the phase-sensitive defector 10, the transmitter, will put The signal is relative to the average level directly, and the detector output tO, which transmits a negative signal relative to the average level, the inverter is connected to the inputs of the adder 12 and the amplitude of the pulsations. The negative output of the detector is Yu and the output of the mid-level forger DIVSH14 with the inputs of the adder 13 414 of the compacted bed of the depositor bed consisting of t gelps fractions. Ischuctive blind leveling the bed is working as follows. Float I and pipe 2 are placed in the chamber of the machine, where there is a roll bed, which pulsates under the influence of the rising outgoing water flow (with a frequency above 0.5 Hz) and is divided into layers consisting of lepsyh and heavy fractions coal In addition to this, the damage of layers consisting of heavy fractions slowly (with a frequency of less than 0.003 Hz) changes under the influence of the technological and hydraulic parameters of the jigging machine, in particular, from the cooling capacity of heavy fractions. The float 1, which has a suitable density, is placed on layers of coal consisting of heavy fractions and repeats their movements. At the output of the diffusion transformer coil 3, an emf is deduced depending on the mutual arrangement of the float I and the coil 3. When the float is pulsated, it is symmetrical about the center of the diffractive transformer coil 3 at the output of its pinch. The emf has the same amplitude but different polarity. The inertia of the following electric drive (elements 5–8) is made so that it does not react to frequent piping and the float with its symmetric oscillation relative to the middle and the bottom of the crawler 3. The D1 transformer cage is fixed. When the level of the jigging bed changes, the float I, a pulsary, breaks the vibration symmetry about the middle of the coil 3 and the following electric drive rotates the drum 8, winding the winding cable 4, which slowly npjfnnmma or lowers the transformer coil 3, restoring the float oscillation symmetry relative to the middle of the coil. A mid-level shaper 9 converts mechanical rotation into an electrical signal. In this way, a signal is obtained corresponding to the average level of the jigging bed. In addition, the signal from the output of the coil 3 | is fed to the input of the phase-sensitive detector 10, which separates separately, negative and positive half-waves of oscillations relative to the average level of the battery. Negative half-wave (motion, pogayuvka, downward relative., Average frequency) level) inverts the invert {YuM 11, and then both signals of the same polarity are summed by the adder amplitude 12 and the signal is received, the proporium amplitude of the pulsation of the jigging post is sent. shaper of the mean level and from the output of the phase-sensitive detector t О, which responds to the downward movement of the cell relative to the average level. These signals have different polarity and when summed up at the output of the sum of torus 13, a difference is obtained proportional to the level of the compacted bed of the jigging bed f consisting of the same fractions. If unloading heavy fractions depending on the signal of the average level, then an additional error will be introduced, which depends on the amplitude of the pulsations (from 5 to 50%). In order to properly maintain the operation mode of the jigging machine, the speed of unloading heavy fractions should be regulated depending on the height of the compacted layer of the jigging pit consisting of heavy fractions. Formula of the invention Inductive leveling device connected via a reducer with a mid-level forwarder, M1, and an electric motor, a switch to a phase-sensitive amplifier, so that, in order to improve the accuracy of measuring the level and amplitude of the pulsations of the jigging bed consisting It is additionally equipped with a phase-sensitive detector, an inverter and two adders, and an output of a diffusion transport coil connected to the input of a phage-sensitive detector, the outputs of which are first directly and the second through the inverter are connected to the input m of the first adder, and the input. A form-level mid-level driver and a single-phase output of the phase-sensitive detector are connected to the inputs of the second adder. Sources of ormash taken into account during the examination 1. USSR author's certificate NI 446 76О, cl. Q 01 F 23/16, 1972. 2. Forward number 2747266 / 22-03 dated April 6, 1959.