SK81193A3 - Accurate automatic volume measuring device for liquids - Google Patents

Abstract

The device consists of a removable container (1), a level indicator (5), the level sensor float (6) evaluated (2, 3) and a supply circuit (4) and a valve (7).

Description

DESCRIPTION OF THE INVENTION

NAME OF THE INVENTION

Precision automatic volumetric liquid metering device.

PART OF THE TECHNIQUE OF THE INVENTION

Volume measurement and dosing of liquids.

BACKGROUND ART OF THE INVENTION

At present, to measure the volume of liquids outside t

laboratory equipment use liquid volume measuring devices

..... flowmeters for the principle of using pollinators ,. where j speed is proportional to the flowing amount of liquid ¹

flowmeters based on the principle of gear pumps, but with the opposite use, in the sense that these pumps are driven by the flowing liquid and their speed is proportional to the amount of flow rate. n y

..... plunger gauges

More generally, the flow meter does not function at minimum flow rates, and their characteristics are non-linear in the field of low flow rates, while being affordable and accurate depending on the area of use of their characteristics.

Second

Flowmeters based on the principle of gear and piston pumps with the use as sensors of the amount of liquids are more expensive due to their production and the stated accuracy is about ± 2%.

SUMMARY OF THE INVENTION

The invention relates to the precise automatic measurement of the volume of liquids in various fields of industry, transport, healthcare, operational and technological dosing of liquids, but also in laboratories.

It is an object of the invention that said device consists of a metering vessel 1 which, by its shape, makes it possible to carry out the measurement. by filling it or emptying it with liquid to the end of the desired volume, it can also transform a relatively small volume unit of liquid to a substantially larger level stroke than a larger vessel cross-section. This change is most pronounced when the liquid is being filled. or the emptying of the measuring vessel has reached its tapered top or bottom, which serves as a level indicator. In a particular application in these level gauges, a float can be used to monitor the level, and in conjunction with the inductive sensors, the upper / lower level information is registered. This grouping makes it possible to achieve a high percentage resolution of the liquid volume.

In particular, the connection of a precise automatic volumetric metering device is shown in Fig. 1, where in many cases it is preferable to use a level indicator 5 which is not part of the metering vessel 1 but is connected to the vessel as a connected vessel according to Fig. 1. . Then i.nfor the level-state initialization is sensed by floats G and sensors 2 and 3 from the level indicator 5.

Another principle of the invention is that the liquid level sensors 2 and 3 are connected to the evaluation and supply circuit 4, which is connected to the three-way solenoid valve 7. This connection allows automatic repetition (dm e r i a v i n i e).

Taking into account both of the above-mentioned principles of the invention illustrated in Fig. 1, then we supply as a whole a precise automatic volumetric metering device for dispensing liquids. A disadvantage of said device is that due to the need for filling and emptying 1 it is slower than the flow metering device, but is much more accurate.

DESCRIPTION OF EXAMPLE OF EMBODIMENTS OF THE INVENTION

The principle of operation will be explained with reference to Fig. 1 and assume the initial state that the measuring vessel 1 and the level indicator 5 are empty.

The inlet of the three-way solenoid valve 7 is supplied with a cresler tube in which the liquid from the tank is under a certain pressure to be dispensed.

The initial state is that the float 6 in the level indicator 5 is in the down position at the sensor 3.

After switching on the evaluation supply circuit 4, the three-way valve 7 is switched on and the liquid starts to flow from the inlet through the valve 7 to the metering vessel 1 and the level indicator S, which form the connected vessels. By increasing the level in the level indicator 5, the float 6 is also carried away by this level. at the level of the sensor 2 by the float 6, a signal is given by the sensor 2 that the container ... is filled with the required volume of liquid and at the same time the valve 7 opens by means of the evaluation and supply circuit 4 thereby stopping the filling 1; at the same time opening towards the outlet, and thus the dosed liquid starts to flow through the valve 7 into the drawn filled container.

When leaking due to the connected containers, the float 6 also drops in the level gauge. When it drops to the level of the sensor 3, it and 4 will switch on again 7, thereby simultaneously closing the outlet and opening the supply. In this way, 1 and b start to fill again and the whole process is repeated automatically. The evaluation and supply circuit 4 registers the number of doses, and the amount of liquid passed through said metering device is also known. The circuit device 4 may be an electromechanical or electronic counter, or the number of batches performed may be transferred to the computer memory.

METHOD OF INDUSTRIAL APPLICABILITY OF THE INVENTION

The invention is applicable wherever precise volumetric automatic but also. non-automatic dosing of liquids with accuracy of tenths of percent of measured volume.

Due to the relatively high accuracy of up to · + · 0.5X, it is very useful with the addition of a surge tank to measure fuel consumption for all types of motor vehicles. Accuracy achieved has a significant impact on the economy of vehicle operation, but 1 early detection of poor vehicle condition], as well as fuel consumption.

Further use of the invention may be in various technological processes where accurate dosing of liquids is required.

Claims (3)

PATENT CLAIMS 1. A precision automatic volumetric liquid metering device, characterized in that it consists of a metering vessel of desired volume which is tapered at the top or bottom to a measuring cross section similar to that of the other part of the vessel, the tapered cross-sections forming gauges where a liquid level sensor (2) or (3) connected to the evaluation circuit (4) which is connected to the valve (7). 2. A ccur a tic luminaire d o rd ing device according to item 1 and point 1, characterized in that the measuring vessel is allies with the level gauge (5) and the level sensors (2) and (3) are located on the level gauge (5). at the level referred to in point 1. 3. The precise automatic volumetric metering device according to 1 and 2 is characterized in that the entire required volume is formed by a vessel of equal cross-section of sufficient length.