SU717624A1 - Device for measuring liquid density and viscosity - Google Patents

Description

one

The invention relates to the field of studying the physicochemical properties of liquids and can be used in those types of scientific and technical experiments where the determination of the exact values of the viscosity of technological liquids, for example, in the refining, paint and varnish, chemical industries is required.

A number of domestic and foreign physicochemical analyzers are known. For example, a continuous float meter for liquids, consisting of a body, inside of which there is a float, a submersible type with a chain and a remote transmission device 1.

Also known is a densitometer, similar in principle of operation and construction with the first, but characterized in that the sensing element is made in the form of two floats, one of which is placed inside the other new float 2.

Known devices have the following disadvantages: low measurement accuracy, inertia.

It is also known a device for measuring the density and viscosity of liquids, containing a flowmeter-rotameter with a disc

a rotor connected through a heat exchanger to the process piping; a photoelectric measurement system 3.

In the known device, the liquid, the density of which is measured, is passed through the heater to the sensing element of the meter. The sensing element is designed as a flowmeter-rotameter with a dish-shaped rotor. The consistency of fluid flow is ensured by the installation of a pressure vessel with an overflow pipe. The position of the upper edge of the dish-shaped rotor of the sensing element is controlled with the help of a light beam from an incandescent bulb, falling on the photoresistance to the driver, when the dish-shaped rotor does not overlap the beam. At a certain density, the dish-shaped rotor of the sensitive element will take up its initial position, blocking the beam of light. When this happens, the relay is triggered, the fluid preheater is turned on, the density of the fluid decreases, the disk-shaped rotor is moved down and the preheater is turned off. The fluid is cool and the rotor is again in its original position. Further, the heating and cooling cycle is repeated. Measurement is achieved by compensating the flowmeter of the rotameter from a change (Yiefpeimoct) and perurature. Thus, by the measure of pliability, flowing through the sensitive radiation, the last femmeypatypa of the last, which is measured with the aid of a lagometer. The device has the following drawbacks, its float gauge with solid material is installed coaxially in the vertical Tf6 p a ctl5jt6SKeHHOM measuring vessel. The test fluid is continuously fed from below and its flow is laminar. In this device Myvopark with a solid material is ACTIVE) T SIMs: High resistance from the bottom (force due to pressure drop before and after the float; force due to density change; force due to HFWMFMHDMHDJTHYHYHYHYHYHYHYHYHYYHYYHYHYYYYHYYHYYYYYYYYYYYYYYYHYYYYYYHYYYYYHYYYYYyyiWfHHMeMdCHYYYYYYYYYyy above). That ecrt ,, itpH injecting the test liquid at a constant speed, the position of the yog head depends on the density and on the viscosity of the test liquid. In addition to this, the temperature of the liquid temperature significantly affects its density B5i3k6cfb7To c fc, the device has a very high f64fttrcfi & Since the liquid is being examined and is being fed to the sensible wormhole's pressure vessel with overflow cabin, the instrument is from TGiCh and inertia Besides being used to measure density and viscosity in pressurized systems. The purpose of the present invention is to measure to4HOCTH measurements and decrease inertia. For this, the device for measuring, density and fluid viscosity, equipped with a photo-electric measuring device .cTBCiM and a heat exchanger, is additionally equipped with a second tenlow exchanger, one second, and a chtomaterolicus mouth rshthpterpthmfrolm s6 rsh. In addition, for sampling, 1 & Technological pipeline installed constriction device. - A diagram of the STBA device for measuring the density and viscosity of liquids is presented on Chortgège. - -. -. The jOHo clears the restriction device 1, the koTopide is placed in the process pipe 2 and serves to select 1 from the liquid to be sprayed. Heat exchangers 3 and 3, heaters 4 and 4 are also included in the device. Receiver unit c6durday Sensor-rotameter 5, 5 with chuyo with Yat € s elements, 6. Photoresistances 7, 7 lamps 8, 8 of glowing and relay 9, 9 The sensor is a photoelectric instrument measuring device. YzMyoreniyGsblbk contains thermometers 10, 10 Shp bSHLNY, turn on to meet the automatic bridge I. The device works as follows ..

Claims (3)

717624 The test liquid is taken out at the biological restriction device 1 of their process line 2 and is simultaneously fed to heat exchangers 3 and 3, the temperature in KOTdjjix is controlled by heaters 4 and 4. Remote FLUID It enters the rotameters 5 and 5. Rotameter 5 is a density and flow sensor. The change in viscosity of the liquid under investigation is practically not affected by the position of the sensing element 6, since it is made in the form of a disk-shaped rotor. The rotameter 5 is made to change flow, density and viscosity, since the sensitive element 6 is made in the form of a cone-shaped float. The position of the sensing element is fixed by photovoltaic devices. The current produced by the photoresistances 7 and 7 is proportional to the luminous flux from the incandescent lamps 8 and 8 when the upper edge of the sensitive elements 6 and 64 intersects the fluid through sensors 5 and 5 at the initial moment of time at a certain density and viscosity. Sensitive elements 6 and 6 move up and overlap the photoresistances 7 and 7. A polarized relay 9 and 9 connects the heaters 4 and 4 to the power supply. Further, the liquid under investigation is heated and the sensitive elements 6 and 6 due to a decrease in density and viscosity move the Siz. Open the path to the light flux, and the heaters 4 and 4 turn off. At the same time, the fluid is cooled, the density and its viscosity increase and the sensitive elements 6 and 6 move upwards. Thus, the cycle of heating and cooling is, however, turning on and off of heaters 4 and 4 not at OYUnakov 1t | d1) aT1daHyzs pLoSHoSTyN a certain gtrIraTtseShe temperatures significantly; smaller, reduced viscosity —the same temperature increment. The temperature to which the test liquid is heated and cooled in heat exchangers 5 and 5 is measured using thermistors of 10 and 10. The difference in temperature; Measurements of thermistors 10 and 10 are recorded by an automati- cally bridge 11, which Shkatni is a measure of 3110. Thanks to the differential method of measurement, the yrimen capacitance in the proposed device; and the geometrical shape of the sensory elements eliminates the influence of the flow rate due to the}} of the consumption of the NOMINALYBGO. : A device with sufficient accuracy can be used as a density meter and a viscometer to measure accuracy when measuring Viscosity above, measuring density. The techno-economic effect is to increase the measurement accuracy and decrease the inertia. Claim 1. A device for measuring the density and viscosity of liquids, containing a flowmeter-rotameter with a plate-shaped rotor, connected via a heat exchanger with a process pipe, a photoelectric measurement system, characterized in that it is additionally equipped with a second heat exchanger and a second flowmeter rotameter with a cone-shaped rotor connected in parallel with the first. . ,,. ; - 0 .. 0 -. ; Part Number 2. The device according to claim 1, characterized in that, in order to reduce the inertia, a narrowing device would be installed in the logical pipeline. Sources of information taken into account during the examination 1. USSR author's certificate 160025, KJI. G 01 N 9/18, 1962. 2. The author's certificate of the USSR 180396, cl. G 01 N 9/18, 1964. 3. Authors certificate of the USSR 139144, cl. G 01 N 9/36, I960. :: -: r: - criJ