SU1326897A1 - Apparatus for measuring liquid density and level - Google Patents

Abstract

The invention relates to measuring devices and permits an increase in the accuracy of measuring the density and at the same time the level of liquids prone to sticking. To clean the float from adhering particles, the device is activated with a button. The float is lifted out of the liquid using a lever, cable drive and a drive. If the weight of the variable volume float is greater than the specified value, which indicates a dirty surface, the device will periodically supply water through the flushing unit until the weight of the variable volume float is set. Thereafter, the float is immersed in the liquid to be measured using a cable transfer lever and a drive. If necessary, the washing cycle is repeated. 1 il. (O (L SA oo 05 00.; o |

Description

The invention relates to a technique for measuring the density and level of a liquid, in particular liquids precipitating and prone to accumulation, and can be used in the cement, medical, microbiological, food industry and other industries.

The purpose of the invention is to improve the measurement accuracy.

The drawing shows the proposed device.

The device contains a float 1, on which a flushing unit 2 and a density converter 3 are connected, connected with the float 4 of variable volume. The float 1 is fastened to the lever 5, which terminates in pattern 6 and the level converter 7 associated with it. The output of level 7 transducer is connected to the nerve inlet.h (two-scale indicating) indicator 8, to the second input of which the output of density converter 3 and the minus chamber of the comparison element 9 are connected, to the pole chamber of which the reference 10 is connected. open; 1 by the first inputs of the first AND and the second 12 triggers. Switching on the input to the first unit is Hera 1 1 connected to the push button 13. The output of the first trigger 11 is connected to the antiphase control chambers of the first 14 and second 15 three-membrane relays. The outputs of the three-membrane relays 4 and 15 are connected to the control. With 1 inputs of the reversing drive 16. The drive shaft 17 is connected by cable 19 through the block 19 to the lever 5. The block 19 is connected to the weight converter 20, the output signal from which is fed to the positional input regulator 2. The output of position regulator 21 is connected to the switch 1, it is connected to the camera of the third three-membrane relay 22 and through a temporary choke 23 with its open; The output of the third three-membrane relay 22 is connected to the on input of the second t) igger 12, the output signal from which is fed to the equilibrium chamber of the fourth three-membrane relay 24. The output of the fourth three-membrane relay 24 is connected to the input of the pneumatic generator 25, the output signal c which enters the valve 26, installed on the line 27 of the nodachi wash water.

The device works as follows.

The device includes pneumatic buttons 13 being pressed in, the first trigger 11 self-blocking, which by its output signal does not turn on the first 14 and second 1B three-membrane relays. Single} The first signal from the three-membrane relay 15 is supplied to the nerve control input of the driver 16, the second input of which through the three-membrane relay 14 is connected to the atmosphere, as a result of which IHTOK 17 of the drive 16 moves to the extreme left position and using cable transmission 18 raises lever 5

to the upper position, and the weight converter 20 outputs a single signal to the position regulator 21, which turns on the third three-membrane relay 22 with a single output signal. After the time set by the throttle 23, the three-membrane relay 22 turns off.

The output signal from the three-membrane relay 22 includes the second trigger 12, which by its output signal turns on the fourth three-membrane relay 24. The output single signal from the three-membrane relay 24 is fed to the input of the generator, 25. The output signal from the generator 25 is fed to the valve 26 installed on the line 27 of the supply of wash water. Its periodic opening, due to the duty cycle of the generator, allows using the washing unit 2, to deliver the washing H1DU to the washing of the variable-volume float 4 with pulses.

Comparison element 1 is compared to 1 (the output signal with the density converter 3 and the output signal from the sensor 10. When they are equal, indicating that there is no sediment on the surface of the variable volume float 4, the unit output 9 of the comparison appears the signal that turns off the first 11 and second 12 riggers, as a result of which the three-membrane relays 14 and 15 are set to the initial state, and the drive 16 moves to the extreme right position. P | 1This float 1 by means of a lever 5 The axle gear 18 with a ngcock 17 of the actuator 16 is lowered into the measured liquid. The indication of the magnitude of the measured density is fed to the 1 input of the indicator 8. At its first input, an output signal is received from the transform (; in; with a piece (fixed on the end of the lever 5.

Claims (1)

Invention Formula A device for measuring density and fluid level, containing a float connected through a lever to a level converter and through a cable transmission with a reversible drive, and an indicator that distinguishes LueeCH in that it contains a flushing unit, an alternating float volume, weight and density conversion, valve installed on the supply water line, positioner, triggers, three-membrane relays, pneumatic generator, e. A comparison item with a setting device, a pneumatic button, a variable throttle, while a flushing unit and a density converter are installed on the float, connected to a variable volume float, and the level converter is connected to one indicator input, the second input of which is connected and the minus chamber of the comparison element, the plus chamber of which is connected to the sensor, and the output to the disconnecting inputs of the first and second triggers, including the input of the first trigger is connected to the output of the pneumatic button, the output to the antiphase control chambers of the first and second three-membrane relays, whose outputs connected to the control inputs of the reversing drive; weight converter connected to the cable transfer unit and to the input position controller, the output of which is connected to the switching-on chamber of the third three-membrane relay, and through a variable choke with its disconnecting camera, the output of the third three-membrane relay is connected to the switching input of the second flip-flop, the output of which is connected to the control camera of the fourth three-membrane relay whose output is It is connected with the input of the pneumatic generator, which is connected to the control input of the valve. sixteen 17