FLOW RATE MEASURING INSTRUMENT FOR THE MEASUREMENT OF A FLOWING MEDIUM.

The invention concerns a Durchflussmengenmessgeriit fiir the measurement of a str6menden of medium, in particular the utilizable warm water quantity in Leitungssystemen.

A iihnliches Messgergt is from the Hungarian patent HU-173 819 admits become. This measuring instrument enthfilt a Gehiiuse, in welehem vordrall, Drallund Nachdrallkammern is intended. In these chambers one spin coil each is arranged coaxially, and the Mantelfliiche of the spin coils is out-arranged with spiralf6rmig running ribs. During this well-known measuring instrument a further employment disk provided with off now gene is present between the Vordrallkammer and the spin chamber, which leads the flowing through Fltissigkeitsmenge into the spin chamber. At the lower part of the spin chamber a verschleissfeste measuring course is present, on which a ball contact feeler rotates. The circulation of the ball contact feeler is measured inductive FiJhler or opto couplers with a optoelektrischen, in the way, as the ball contact feeler each time produces an impulse with passing the inductive or optoelektrischen Ftihlers, which fibre a suitable converter a Impulsziihler it is then zugefiihrt whereby the flowing through Fliissigkeitsmenge is measured kann.

This well-known L6sung points however some M ingel auf.

A Naehteil of this mechanism exists in the unsatisfactory reproductibility and the brief Stabilitfit, whereby the results of measurement gr6sstenteils contain only a informariven character. A further lack exists the area of application in the limited measuring range, thus class remains iiussert limited. Since the Ftihler does not enthiilt a position element, the mutual exchangeability of the individual elements is not gew hrleistet.

with the traditional Technologic manufactured components Purpose of the invention is to be suggested it, a Durchflussmengenmessgeriit, which the erwiihnten disadvantages vermeidet.

Erfindungsgemfiss a Messger it that initially erw ihnten kind planned, which the characteristics aufgefiihrten in the requirement 1 besitzt.

A favourable Ausftihrungsform invention in accordance with issen Durchflussmengenmessger its consists of the fact that the ball contact feeler consists of ferrousmagnetic material and that alas Messgeriit for the connection to a Fiihler with receipt head with Hall generator furnished ist.

With a further Ausftihrungsform of the Messgeriits the ball contact feeler can exist the Messgeriit of a paramagnetic material and for the connection to a Fiihler for perception yon Kapazidits inderungen trained sein.

Another M6glichkeit consists of the fact that the Messger it trained as the connection to a signal-processing unit ist.

Invention in accordance with isse one measuringturn out unhand a favourable Ausfiihrungsbeispiels, with the help of which enclosed designs more niiher erliiutert; Show:

Figure 1 a cut by the Messgeriit, figure 2 an example fiir the measuring course, figure 3 the Blocksehema the Messger it attached Messsystems.

The represented Messgerfit gemiiss Fig. 1 can be used favourably e.g. for the measurement of the utilizable warm water quantity, and exhibits a Gehiiuse 1 with connection entrance, which miJndet into a spin chamber 2. In the spin chamber 2 3s a Vordrallspindel 3 is coaxially arranged, which is provided along their Mantelfliiche zweckm issig with a dreig ingigen spiral 9. Along the spiral 9 einstr6mende medium in the cooperation with the spin spindle 3 in circulation it is shifted, so that no turbulence develops. In this way it is reached that the ball contact feeler 7 act ichlich the flow proportionally in the measuring chamber 4 zirkuliere.

Between the spin chamber 2 and the measuring chamber 4 in, the quantity of the durehfliessenden Fltissigkeit adjusting position element 5 is intended, which is zweckmiissig a spiralf6r4s miges reduction element, which serves the number of revolutions of the ball contact feeler 7 and for adjustment the ideal range for the regulation, with which the speed of the medium withdrawing from the spin chamber can be regulated directly. A further Regelungsm6glichkeit is by the Andeso rung the mass and/or the dimension of the ball contact feeler 7 gegeben.

With the suggested Messger it against fibre the tiblichen deviations from 2-3%.<br exhibits the sliding qualities good with the spiral 9 out-arranged Fiihrungsbahn/> in the spin chamber 2, so that the measured values iten with verss ski those Ger in close borders of 0,2-0,6% lie, One of the most important characteristics and one of the most important realizations of the invention 6. the measuring course 6 lie are niimlich in such a way out-arranged in the organization of the measuring course finding in the measuring chamber 4 that the measurement within wide range is linearized, as the ball contact feeler 7 - under Berticksichtigung of the mass and number of revolutions of the ball contact feeler 7, the volume of the spin chamber 2, as well as the medium resistance of the medium which can be measured - is forced with a removing flow rate on a measuring course with reduced diameter, at the same time however the ball their ursprfingliche number of revolutions beh ilt. It was berticksichtigt that itself on the ball contact feeler 7 the speed, centrifugal Kraft and the lift strength of the Fliissigkeit auswirken.

Fig. an example represents 2 ffir the training of the measuring course 6. It is ersiehtlich with the fact that the measuring course 6 is divided into sections and the number of sections of the accuracy which can be reached determines accordingly wird.

In this way the measuring range of the Messger can its substantially extended werden.

A further advantage with the measuring course 6 out-arranged Messger its consists of it that the dead time is iusserst short when starting owing to the course organization, wodureh the measuring accuracy erh6ht becomes. The number of revolutions of the ball contact feeler 7 measures excluding the Durchflussmenge.

lm go iuse 1 is arranged a further regulator insert 8 and the VordraUspindel 3 is yon down ago dutch a Klernmdorn I 0 untersttitzt.

Comparative with the well-known MessgerS_ten, suggested L Ssung exhibits the further advantage that with one forderungsgereeht out-arranged measuring chamber 4 the 667918 spin spindle in the Nachdrallkammer 12 eriibrigt itself. A further advantage shows up in the fact that the position element 5 a good Mfglichkeit gewiihrleistet for regulation, whereby the individual element mutually austausehbar sind.

With invention in accordance with issen Messger the number of revolutions of the ball contact feeler 7 finding in the measuring chamber 4 can in versehiedene way, sees itself well-known Vorriehtungen also on it being seized and be measured. If the ball 7 consists of a ferrousmagnetic material, then the perception can take place inductively, if nieht, then kapazitiv.

The number of revolutions of the ball contact feeler can also with a receipt head with Hall generator perception werden.

The Wesentliehe of all perception methods consists of the fact that mittens animal ball contact feeler 7 is produced for revolution an impulse with each particulars is, whereby the impulses in actually well-known are ihlt way gez; for this purpose that along 7 Ftihler 13 and the angesehlossene, signal-processing unit 14.<br in connection serve the ball contact feeler/> B 1 sheet designs 667,918 1 sheet * Fig. 1 29 ¢2g ¢28°8 ¢ 28.6 ¢ 28.2 .i ¢27,98/¢25.6 (1, ¢20,6 I1/. - -4 - e-4 ": -. V 8 - I i ''' ° '….

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