SU1236317A1 - Siphon metering pump - Google Patents

Abstract

The invention relates to instrumentation and can be used in technological devices for the automatic delivery of specified doses of fluid. Lel of the invention is the simplification, design and increase of the reliability of dosing at low flow rates of the dosed liquid. The device contains a dosing vessel 1 with a siphon 2, the output end of which is accomplished, for example, in the form of a loop 3, the lower part connected through the locking element 5 to the bottom of the dosing vessel 1. Before the operation begins, the loop 3 is filled with a liquid whose height varies depending on from the liquid level in the vessel 1. When the liquid is expelled from loop 3 to the maximum height H, it is ejected from the loop and the siphon is triggered, provided that the heights from the upper liquid level in the siphon and the tube to the upper point of the siphon. 2 Il. with S (L with w w .2

Description

eleven

The invention relates to instrument engineering, in particular, to devices for dispensing a liquid. In laboratory and industrial conditions, it can be used in technological equipment for the automatic delivery of predetermined doses of liquid.

The purpose of the invention is to simplify the design and increase the reliability of dosing at low flow rates of the dosing liquid.

FIG. Figures 1 and 2 show the siphon dispenser at initial dosing points.

The dispenser contains a dispensing vessel 1 with a siphon 2, the output end of which is made with a bend, for example, in the form of a loop 3, the lower part 4 of which is connected through the locking element 5 to the bottom of the dispensing vessel 1.

The operation of the siphon dispenser is carried out as follows.

Before starting work, it is necessary to open the locking element t 5 and fill-. liquid thread loop 3, after which the closure element is closed.

When filling the metering vessel 1, the liquid level in it rises, and the air or gas contained in the siphon 2 and the tube displaces the liquid from loop 3 in the limiting case to a height Hj,. In this position, if height h is less than H-, liquids from loop 3 and siphon is triggered. Consequently, for the normal operation of the proposed device, it is necessary that H J be greater than hjj at the moment of ejection of fluid from loop 3. The volume of gas displaced from siphon 2 and tube is equal to

(S ,,

ScHcp) (

S

SIF

de

Chip

R

H,

- the area of the free cross section of the siphon;

- free tube area;

- height from lower level in siphon and pipes363172

. ki to. top point sifo-.

on; . . h - height from the upper level. n liquids in the siphon and 5 tubes. to the top point

siphon. ,

This volume of gas is equal to the volume of fluid displaced from the h S loop, where Sp is the area of the loop section. 10 Out of Equality

h, s - H, (s, p s,)

we find

h hoCSrp + S ,,)

HI (Ztr + .5sts | p) -

Tp CHCp

a so as the condition srabatgoani sio

background is the inequality H h

20 we will receive

H,

HI (Sff + ScMip) -

s.p.

 cif

You can accept that, then

H,

H (Stp + 5 |. F) -

S.p si p

From this inequality, it is possible to approximately determine the ratio of the parameters of the tubes, ensuring the performance of the dispenser.

After draining the liquid from vessel 1, it fills up to some height loop 3 and some amount will remain in vessel 1, with the liquid level in the siphon 2 and the tube being slightly higher than the liquid level in vessel 1 due to the discharge generated by the liquid when it is drained. ;

40

Claims (1)

Invention Formula A siphon dispenser containing a dispensing vessel with a siphon, which is used for the purpose of simplifying the design and increasing the reliability of the dispensing at low dispensing flow rates, the siphon output end bends filled with liquid. Editor A. Kozoriz Compiled by V. Ermakov Tehred T. Gerber Proof-reader S. Cherni Order 3080/44 Circulation 705 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4