SU443257A1 - Device for batch dosing of liquids - Google Patents

Description

one

The invention relates to the field of dosing and can be applied in the chemical industry for batch dosing of liquids and melts of polymeric materials.

A device for batch dosing of liquids is known, which comprises a pressure vessel with discharge pipes and a source of pressure.

However, when dispensing viscous materials with known devices, clogging of the discharge channels occurs, which leads to a change in the size of the portion and disruption of the operation of the device.

to increase the reliability of the proposed device, gas supply tubes fixedly mounted on a lid made in the form of a pump casing are coaxially inserted into the upper part of the drain pipes, with a check valve installed at the end of each tube and drain pipes

made removable

The drawing shows a schematic diagram of the described device containing a pressure vessel I, equipped with a nozzle 2 for supplying a metered liquid and replaceable drain nozzles 3

The container is closed on top of the cover 4, which is the housing of the diaphragm pump. On the cover, gas supply tubes 5, fitted with a check valve made, for example, in the form of nipples b, are coaxially with drain nozzles. In addition, a membrane 7 with a check valve 8 is attached to the lid, connected to the drive mechanism Y, giving it a reciprocating movement.

The device works as follows.

The fluid through the pipe 2 is fed into the pressure tank I, from which it begins to flow in a continuous flow through an extended drain nozzle 3, For section 8

Driving the fluid flow into separate portions, an actuating mechanism 9 is activated that communicates reciprocating movement 7 of the membrane 7. When the membrane moves upward, gas or air through the check valve 8 is sucked into the cavity located under the membrane with the gas moving downward through the membrane tubes 5 are pushed as separate portions into drain nozzles of the Ze; moreover, the amount of ejected gas or air must be sufficient to form a bubble with a diameter not less than the inner diameter Drain nozzle The size of gas or air portions is controlled by the membrane stroke, which is achieved by changing the eccentricity of the 9f drive mechanism. At fluid velocities in the drain nozzles exceeding the velocity of bubbling of gas bubbles, the latter are carried away by the fluid flow and move along with it. portions The size of portions of a fluid is determined by the distance between two adjacent

bubbles, which is governed by the frequency of oscillation of the membrane 7 and the speed of movement of the liquid from the drain nozzles, which depends on the pressure of the liquid in the pressure vessel 1c. The individual portions of the liquid flowing from the nozzles can flow into the container when it is packaged and packaged into various process equipment on moving surfaces of the cooling equipment during cooling and granulation of polymer melts,

 SUBJECT OF INVENTION

Device for batch

fluid containing a pressure vessel with drain nozzles and a pressure source, characterized in that, in order to increase reliability, gas supply tubes fixedly mounted on a cover made in the form of a pump casing are coaxially inserted into the upper part of the drain nozzles each tube has a check valve, and the drain pipes are removable

V

:

I o u

X.

five

p D

oh oh

d