RU1774175C - Liquid dosing apparatus - Google Patents

Abstract

Usage: for volumetric dosing in various sectors of the national economy. SUMMARY OF THE INVENTION: When the pump is turned on, the medium is homogeneous in both tanks and the liquid reaches the overflow level in the supply tank. At the moment of dosing, on command of the drive time relay, it moves the flexible pipe and sets the latter to the appropriate position, a dose is issued. After dispensing a dose, the flexible tube takes up a position in which there is no dispensing. After the dose has been set, the cycle of work is repeated. 1 ill.

Description

The invention relates to volumetric dosing devices and can be used in various industries.

The closest in technical essence to the proposed dispenser is a liquid dispenser (AS USSR No. 821930, class G 01 F 11/16, 1979), containing a consumable and additional containers connected by an overflow pipe, and a flexible tube for supplying the dosed liquid connected to the supply tank and the flexible tube drive.

The disadvantages of this dispenser are their low accuracy, for example, deformations of the flexible tube affect the accuracy of the dose, the bulkiness of the structure, the inability to quickly and conveniently change the volume and time of dispensing of the dose, and the lack of effective mixing. In fact, such a dispenser solves the problem of obtaining constant doses of a homogeneous liquid.

The purpose of the invention is the provision of accuracy, simplicity of design, which would have provided the possibility of quick and

conveniently changing the volume and time of dispensing the dose, which makes it possible to mix the dosing medium, easy to maintain, and also ensuring uniformity of the dosed medium by forcing it to be mixed.

This goal is achieved by the fact that the pump, pipeline and time switch are introduced into the dispenser, the flexible tube is made with a calibrated nozzle, the internal cross-sectional area of which is 8-12 times smaller than the internal cross-sectional area of the flexible tube, and the flexible tube is connected to the supply tank between the overflow pipe and the bottom of the supply tank, the pipeline is connected to the supply tank between the flexible tube and the bottom of the supply tank, and through the pump is connected to an additional tank, and the time relay is connected to the AC drive still flexible tube.

To further simplify the device, instead of two tanks, one with an internal partition can be used, through which, when the pump is running, liquid

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by gravity pours from the consumable section to the additional.

Thanks to the proposed implementation, the accuracy of the dose is increased, the design is simplified, the ability to quickly and conveniently change the volume and time of the dose is dispensed, the dispenser is simplified, the medium is homogeneous, which makes the proposed dispenser also suitable for dispensing variable doses of liquids containing particles precipitating.

The invention is illustrated in the drawing.

The drawing shows the proposed lozator, section.

The dispenser comprises a tube 1 with a calibrated nozzle 2 at its free end, connected to the actuator 3, which allows vertical movement. The drive is connected to a control device 4 containing a time relay that sets the dosing time and dose volume. At the other end, the flexible tube 1 is connected externally to the supply vessel 5 below the overflow level. The supply tank overflow pipe 6 is connected to an additional tank 7, which may contain a supply of dosed liquid. Mixing of the medium and at the same time ensuring a constant level in the supply tank is carried out by a pump 8, which supplies liquid from the additional tank to the flow below the point of connection of the flexible tube.

The dispenser works as follows. Before starting dosing, turn on the pump 8, which should work for a while to ensure uniformity of the medium and at the same time ensure that the liquid in the supply tank (section) reaches the overflow level. Prior to dosing, the flexible tube with the nozzle must be in the no. Dosing position. At the time of the start of dosing, the flexible tube 1, upon the command of the control device 4, is set to the dosing position and the liquid is dosed at the flow rate specified by the nozzle section 2 and pressure N for the time set on the time relay. After dispensing a dose, the flexible tube is set to no and remains in it until a new dosing cycle begins. Dosing cycles can continue (without replenishment) until the stock in the additional tank is exhausted. Pump performance should not be lower than the average flow rate of the dosed liquid.

The proposed dispenser is highly accurate, since the dose volume depends only on factors determined by the design and setting of the dispenser.

- area of the hole calibrated

nozzles ,,.

- pressure from a liquid column of height H between, overflow level and the location of the flexible pipe connection,

- the dosing time set by the time relay (general industrial time relays make it possible to set the exposure time with an accuracy of 0.05 s).

5 The deformations of the flexible tube will not affect the accuracy of the dose, since its cross section is chosen much larger than the cross section of the calibrated nozzle, as a result of which changes in the hydraulic resistance of the flexible tube can be neglected.

The use of an easily removable calibrated nozzle and time switch allows a wide variation in the volume and time of dispensing a dose. Since both the volume of the dose and the time of its delivery are usually determined, a rough adjustment should be made by the selection of the nozzle, while an exact adjustment should be made by changing the exposure time.

0 The proposed metering design allows the use of simple standard drives, for example diaphragm or piston, for vertical movement of the flexible tube.

5 We emphasize that the possibility of quickly and simply (changing the time relay setting) changing the volume (and the dispensing time) of the dose is very important in some cases. For example, when preparing nutrient solutions for watering plants in greenhouses, they are first prepared (manually daily volume) concentrated additive solutions by dissolving dry mineral fertilizers in water. Wherein

5, the content of substances in such a solution can vary greatly. Since the maintenance of a constant content of additives is a difficult task, in the preparation of nutrient solutions

0 vary the volume of doses in accordance with the content of substances in the concentrated solution. Such tuning is carried out at least once a day. The proposed dispenser is a high-performance, reliable and inexpensive device that is convenient in operation and maintenance. Its use in various sectors of the national economy can have a significant economic effect.

Claims (1)

SUMMARY OF THE INVENTION A liquid dispenser comprising a supply and additional containers connected by an overflow nozzle and a flexible tube for supplying a dosage liquid, connected to a supply container and a flexible tube movement actuator, characterized in that, in order to ensure uniformity of the dosage medium by forced mixing, it introduced a pump, pipeline and time switch, the bending tube is made with calibrated the nozzle, whose internal cross-sectional area is 8--12 times smaller than the internal cross-sectional area of the flexible pipe, the flexible pipe is connected to the supply tank between the overflow pipe and the bottom of the supply tank, the pipeline is connected to the supply tank between the flexible pipe and the bottom of the supply tank and through the pump connected to an additional tank, and a time relay connected to a flexible tube movement actuator.  1