SU1203370A1 - Piston=type liquid-metering device - Google Patents

Description

 The invention relates to the field of dosing of liquids and can be used in the chemical, medical and other industries.

The purpose of the invention is to increase the accuracy of dosing by eliminating spraying on the discharge channel after the dose is dispensed.

The drawing shows the proposed dispenser.

The piston metering device contains a supply container 1, a housing 2 located under it with diametrically located inlet 3 and an outlet 4 channels and a rotary cylinder 5 installed in the housing 2 with a skBO Zny diametrical channel 6, the series of which a piston 7 connected through an adjustment unit 8 of their oil 1, of length to it, each piston 7 provided with at least one pin driver 9, which is attached normally to its axis, and two through axial slit holes are made in the rotary cylinder 5 These 10 communicated with the diametric channel, a pin driver was inserted into each of them, and in the housing 2 the centrifugal axis of the rotary cylinder 5 lii.inojjHena was centered with a cylindrical guide I1 for pin drivers 9 with a groove 1 2 in the area of the exhaust channel 4

The operation of the dispenser is as follows.

When the channel 6 is located vertically, the movable pistons under the action of fluid and its own weight

Editor L. Zaitseva

Compiled by V. Ermakov

Tehred O. Vashchishin; Proofreader L. Patay

Order 8407/44 Circulation 702 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PIP Patent ,, Uzhgorod, st. Project, 4

descend to their lowest position and push the contents of the exhaust channel 4, while the pin drivers 9 move into the slotted holes 10 of the rotary cylinder 5, and one of them enters the groove 12 of the dispenser housing 2. In the upper part of the channel 6, with its walls and the end of the piston located there, a dosing chamber is created, into which the liquid flows from the supply channel 3 and the supply tank 1.

At the beginning of the movement of the rotary cylinder 5 located in the groove 12

The pin driver 9 slides over it, moves the movable pistons upward by a distance equal to the depth of the groove 12 in the cylindrical guide 11, and the pistons suck in a discharge channel 4 a portion of the liquid formed on it, and a part of the liquid is pushed out of the dosing chamber back into the inlet channel 3. The remaining part of the liquid is moved by the rotary cylinder 5 until the channel 6 is set to the vertical position, after which the dosing cycle is repeated.

To change the dose, the length of the movable pistons is changed, thereby regulating the volume of the dosing chamber. This operation is carried out without stopping the doses of an ator with the vertical position of channel 6

by rotating the coupling sleeve 8 and setting the vernier and the main scale of the required dose volume.

The depth of the groove 12 depends on the ratio of the diameters of the exhaust

channel 4 and channel 6.

Claims (1)

A PISTON LIQUID DISPENSER containing a consumable container, a housing located beneath it with diametrically located supply and exhaust channels and a rotary cylinder with a through diametrical channel installed in the housing, in which two movable pistons are connected in series, connected through a unit for regulating their total length, characterized in that, in order to improve the accuracy of dosing by eliminating droplet formation on the exhaust channel after the dose is issued, each piston is equipped with at least one pin lead Ohm, which is fixed on it normally to its axis, and in the rotary cylinder there are two through axial slotted holes in communication with the diametrical channel, a pin lead introduced into each of them, and a cylindrical guide for pin drives is made in the body concentric with the axis of the rotary cylinder forging with a groove in the area of the exhaust channel.