SU906563A1

SU906563A1 - Apparatus for metering liquids

Info

Publication number: SU906563A1
Application number: SU802942371A
Authority: SU
Inventors: Евгений Павлович Тярасов; Герман Павлович Тярасов
Original assignee: Всесоюзный Научно-Исследовательский И Конструкторский Институт Медицинской Лабораторной Техники
Priority date: 1980-06-19
Filing date: 1980-06-19
Publication date: 1982-02-23

Description

(5) УСТРОЙСТВО ДЛЯ ДОЗИРОВАНИЯ ЖИДКОСТЕЙ(5) DEVICE FOR DOSING LIQUIDS

1one

Изобретение относитс к медицине кой технике и может быть использовано при дозировании малых объемов реагентов и биожидкостей в клинико-диагностических лаборатори х.The invention relates to medicine and can be used in the dosing of small volumes of reagents and biofluids in clinical diagnostic laboratories x.

Известно устройство дл дозировани жидкостей, состо щее из поршневого дозатора, в корпусе которого смонтированы гильза и клапан, приспособлени дл регулировани дозы и гильза и клапан, приспособлени дл регулировани дозы и емкости дл жидкоети 1 .A device for metering liquids is known, consisting of a piston metering device, in the case of which a sleeve and a valve are mounted, dose adjustment devices and a sleeve and a valve, dose adjustment devices and a liquid network container 1.

Недостатком известного устройства вл етс то, что в нем имеетс два уплотнени , что увеличивает веро тность утечки жидкости и создает дополнительное сопротивление при перемещении поршн .A disadvantage of the known device is that it has two seals, which increases the likelihood of fluid leakage and creates additional resistance when the piston is moved.

Цель изобретени - повышение надежности в работе путем предотвращени утечки жидкости.The purpose of the invention is to increase operational reliability by preventing fluid leakage.

Поставленна цель достигаетс тем, что в устройстве, состо щем из поршневого дозатора, в корпусе которого смонтированы гильза и клапан, приспособлени дл регулировани дозы и емкости дл жидкости, внутренн поверхность гильзы в верхней части выполнена конической, а по ее окружности образованы прюрези дл прохода жидкости, клапан представл ет собой трубку, нижний конец которой имеет форму конуса дл входа в коническую часть гильзы, а верхний - в виде ниппел , при этом над последним установлена втулка с отверсти ми дл прохода жидкости к прорез м гильзы.The goal is achieved by the fact that in a device consisting of a piston metering device, in the case of which a sleeve and a valve are mounted, devices for adjusting the dose and a container for a liquid, the inner surface of the sleeve in the upper part is made conical, and around its circumference there are holes for the passage of liquid. , the valve is a tube, the lower end of which has the shape of a cone for entry into the conical part of the sleeve, and the upper end is in the form of a nipple, with a sleeve with openings for the passage of fluid above the latter and to the slot m liner.

На чертеже изображено устройство.The drawing shows the device.

Claims

The device consists of a piston metering device, in the case 1 of which a sleeve 2 is installed, in the upper part of which the inner surface is made conical and has around the circumference the slots 3 for the passage of fluid, and the valve, which is a tube 4, has a lower end in the conical part of the sleeve, and the upper in the form of a nipple, with the sleeve 5 with the holes 6 for the passage of fluid installed over the latter, and the piston 7 is mounted for movement in the sleeve and has a rod 8 at the end of which the needle is resistant in The street 9 and the dose control device, made in the form of a threaded sleeve 10. The device operates as follows. In the initial position, under the influence of springs 11 and 12, the rod 8 with the piston 7 is in the lower position. When a force is applied to the stop sleeve 9, the rod 8 with the piston 7 will move upward. As a result, the cavity of the sleeve 2 will create an overpressure, as a result of which the lower end of the tube with the outer surface will press against the walls of the conical hole in the upper part of the sleeve 2 and will block the slots 3 through the nipple and moves away from the core 13 and open the way for the passage of fluid from the cavity of the sleeve 2 into a tube for dispensing liquid dose. The movement of the rod 8 with the piston 7 will continue until the stop sleeve 9 rests on the threaded sleeve 10. When the force is removed from the stop sleeve 9, the rod 8 with the piston 7 will move downwards under the action of springs 11 and 12. As a result, a reduced pressure will be created in the cavity of the sleeve 2, whereby the nipple tube k tightly engages the core 13 and blocks the return path for the discharged liquid, and the walls of the conical surface of the tube k are deformed inwards and open the way for the passage of fluid from the container 15 to the cavity liner 2 through the holes 6 and the slot 3. The use of the proposed device will provide a significant economic effect by reducing the loss of spilled liquid. The invention is a device for dispensing liquids, consisting of a piston metering device, in the case of which a sleeve and a valve are mounted, devices for adjusting the dose and a container for a liquid, characterized in that, in order to increase reliability by preventing leakage of liquid, the inner surface of the sleeve the upper part is made conical, and along its circumference there are slots for the passage of fluid, the valve is a tube, the lower end of which has the shape of a cone for entering the conical part Threat, and the top - in the form of a nipple, with the sleeve is installed above the latter with openings for the passage of fluid to the slot of the sleeve. Sources of information taken into account in the examination 1. USSR author's certificate № 712086, cl. A 61 J5 / 00, 1978.