Systematic capillary viscometer auto-measurement apparatus

Abstract

The invention belongs to the technical field of fluid viscosity measurement and discloses a systematic capillary viscometer auto-measurement apparatus, which includes an ultrasonic generation apparatus and a residue removal and filter device, which are connected through a gas removal pipeline. A flow rate valve is installed on the outlet of the residue removal and filter device and is connected to a capillary viscometer. A laser sensor is arranged at a mark line position of a measuring bulb of the capillary viscometer. A digital timer is connected to the laser sensor. The ultrasonic generation apparatus, the residue removal and filter device, the flow rate valve, the laser sensor and the digital timer are all connected to a controller. Processes, such as time difference, pretreatment of a sample, and the like, during measurement of the capillary viscometer are intelligently controlled, so that measurement error due to manual factors is reduced and accuracy of measurement result is increased. A to-be-measured sample is systematically subjected to ultrasonic dispersion, gas and residue removal and the like operations, so that influences, which are caused by blocking a pipe since the sample carries bubbles and foreign matters, on the measurement result can be avoided.

Description

technical field [0001] The invention belongs to the technical field of fluid viscosity measurement, and in particular relates to an automatic capillary viscometer measuring device for a system for measuring the kinematic viscosity of fluids such as polymer solutions and oil products. Background technique [0002] The molar mass of a polymer not only reflects the size of the polymer molecule, but is also directly related to its physical properties. Different macromolecular mixtures, so the molar mass of high polymers usually measured is a statistical average; there are many methods for measuring high polymer molar masses, and the average molar masses obtained by different methods are also different. In comparison, the viscosity method has simple equipment and is easy to operate. It is convenient and has good experimental accuracy, and is one of the commonly used methods. The determination of liquid viscosity coefficient is a classic routine experiment in the field of fluid m...

AI Technical Summary

Problems solved by technology

However, the currently widely used viscosity measuring devices still require a lot of manual operations throughout the whole process, and human factors are greatly affected, such as dissolution and dispersion of samples, filtration to remove impurities, degassing, visual readings, timing by pinching the meter, etc. The degree of automation is not high and measurement errors bigger

Existing technology: an automatic verification device for a capillary viscometer, patent announcement number: CN203299084U, authorized on November 20, 2013, adopts the following technical solution: an automatic verification device for a capillary viscometer, including a main control system, for Place the constant temperature bath of the capillary viscometer to be verified, the temperature sensor for collecting the temperature of the constant temperature bath, the heater for heating the constant temperature bath, and the image for collecting the capillary viscometer including the upper and lower scale lines The camera and the vacuum chuck controlled by the main control system; the heating control output port of the main control system is electrically connected to the input end of the heater through the heater driving circuit, and the temperature signal output end of the temperature measurement sensor is connected to the temperature signal acquisition of the main control system The port is electrically connected, and the image output end of the camera is electrically connected with the image data input port of the main control system; the automatic verification device of the invention can collect the image of the capillary viscometer through the camera, and obtain the liquid flowing from the upper engraved line to the lower according to the image content. The time of the marking line is used to automatically complete the verification of the capillary viscometer; however, although the invention uses the method of image acquisition to realize the automatic measurement of the capillary viscometer time, it cannot avoid the error caused by the measurement sample itself, and the capillary viscometer has not been systematically realized. Automation of viscometer viscosity measurement, for example, it is inconvenient to add liquid to a conventional capillary viscometer, which will cause easy spillage, and the gas contained in the measured liquid will directly affect the accuracy of viscosity measurement results. At the same time, the insoluble matter before measurement The degree of full dissolution and mixing directly affects the falling speed of the liquid in the measuring ball of the capillary viscometer, especially when the experimenter needs to visually observe the sample liquid level to reach the position of the measuring ball marking line, and it is prone to judgment time difference and error, thus affecting the final The accuracy of the viscosity measurement value

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