DD290264A5 - DEVICE FOR VISCOSITY MEASUREMENT - Google Patents

Abstract

Device for measuring viscosity, applicable preferably as Betriebsmeszgeraet for measuring the Viskositaet fl owing, inhomogeneous media. In the device, below the media surface in the mash phase, a mastic 1 is dropped into a mashing tank 3, and the falling time is measured. In this case, the medium is displaced through the gap 4 between mastic 1 and container 3. The gap 4 is thereby forcibly flushed. The level compensation takes place by means of suitable openings above the fall distance of the tine body 1. According to the invention, in a resting phase, a bottom valve 5 with a large cross-section is opened abruptly, which forces a medium exchange between the lower container area and the surroundings. As a result, a retention of proportions of deviating viscosity in the measuring tank 3 is prevented and separate maintenance work is unnecessary. Furthermore, viscosity changes are quickly detected by this form of medium exchange. FIG {Viskositaetsmessung; Betriebsmeszgeraet; streaming media; inhomogeneous media; Bottom valve; Medium exchange; Meszkoerper; Meszbehaelter; Fall time; Dormancy}

Description

The invention relates to a device for measuring viscosity and is preferably applicable as a Botriebsmeßgerät for measuring the viscosity of flowing, inhomogeneous media.

Characteristic of the known state of the art

Viscosity meters with free-falling measuring bodies are not suitable for use in flowing media, since the fall time is influenced as a measure of the viscosity by currents and turbulence.

As a viscometer, which operates independently of flow and turbulence, a device is known in which falls in the measuring phase, a volumetric flask in a measuring container and the medium displaced over the gap between the two. In the filling phase, the medium is sucked in through the gap. In the case of inhomogeneity of the medium, it may be the case in the lower area of the measuring container that media contents with deviating viscosities remain, which lead to measurement errors without cleaning the measuring container.

Object of the invention

It is the object of the invention to provide a device for measuring viscosity, which is applicable in the operational use and maintenance-free arbeitot.

Explanation of the nature of the invention

The invention has for its object to provide a device that operates maintenance-free flow and turbulence independent as well as inhomogeneous media.

In the device, a measuring body is dropped into a measuring container underneath the media surface in the measuring phase, and the falling time is measured as a measure directly proportional to the viscosity. In this case, the medium is displaced in the measuring phase through the gap between the measuring body and container over which it flows back into the measuring container in the filling phase. The gap is thereby forcibly rinsed. The level compensation is carried out by suitable Öffnungspberhalb dor fall distance of the measuring body.

It seems obvious to introduce another Äewegungsphase of the measuring body, wherein during a renewed

Lowering the measuring body of the sump is ejected through an opening in the bottom of the measuring body. However, this requires a complicated mechanism and reduces the number of possible measurements per unit time.

According to the invention, in a further phase, a bottom valve with a large cross-section is opened abruptly in the measuring container, which forces a medium exchange between the lower container region and the environment of the device. As a result, a retention of shares of deviating viscosity in Meßbehälte, - prevented and separate maintenance (cleaning) is unnecessary. Furthermore, viscosity changes are quickly detected by this form of medium exchange.

The invention will be explained in more detail using an exemplary embodiment.

embodiment

The measuring body 1 is located in the measuring container 3 below the surface of the medium 2 in a position that allows him to fall by a certain distance. Between measuring body 1 and measuring container 3, there is a gap 4, through which the medium 2 is displaced when falling. Below the measuring container 3, a bottom valve 5 is arranged with a large cross-section, which allows an abrupt opening an exchange of the medium 2 between Meßbehälterinnenraum and the environment. The lifting of the measuring body 1, the measurement of the falling time, the operation of the bottom valve 5, etc. carried out by known devices and methods.

Claims (1)

Device for viscosity measurement, wherein a measuring body falls a certain distance below the surface of the medium in a measuring container, wherein it displaces the medium through the gap between the measuring body and the measuring container, characterized in that before or after the falling time of the measuring body (1) a bottom valve ( 5) with a large cross-section abruptly and briefly opened. For this 1 page drawing Field of application of the invention