RU2234305C1 - Apparatus for dosing of infusion solutions into polymer containers and welding the same - Google Patents

Abstract

FIELD: equipment for dosing of medicinal preparations and high-frequency welding of polymer materials in medical, pharmaceutical and scientific enterprises and drug stores.

SUBSTANCE: apparatus has casing, solution reservoir, pump, connecting pipe, and control unit connected to electric power source and pump, column, dosing unit including polymer pipe mounted between pump and connecting pipe, electromagnet with movable core, movable pinching member mechanically connected to movable electromagnet core and immovable pinching member fixed on casing, welding unit including high-frequency generator, additional electromagnet with movable core, movable welding electrode mechanically connected to movable core, immovable welding electrode connected to casing, first and second time relays. Apparatus is further provided with container pipe position sensor, third and fourth time relays. Control unit, dosing unit and welding unit are fixed on column. Pipe position sensor is fixed on connecting pipe of dosing unit and is electrically connected to control unit. Pinching members are arranged between pump and connecting pipe. Electromagnet is connected to pipe pinching members and is switched to control unit through third time relay having lag time greater than that of fourth time relay, through which welding unit is connected to control unit.

EFFECT: increased efficiency by automatic dosing of infusion solutions into containers and welding thereof.

2 cl, 1 dwg

Description

The invention relates to equipment for dispensing medical preparations and high-frequency welding of polymeric materials and can be used in medicine, in particular, can be used in pharmaceutical enterprises, as well as in industrial pharmacies, and research medical institutions.

Known devices for heating and welding of polymeric materials by high-frequency current, containing a high-frequency generator and welding electrodes in the form of metal press contact plates or metal rollers [1]. For example, in a welding machine of the LGS-0.2 brand, the materials to be welded - films or tapes made of polyvinyl chloride - are rolled between two rotating rollers - electrodes, to which a high-frequency current from a high-frequency generator is supplied. A high-frequency generator provides simultaneous and uniform heating of the materials being welded over the entire thickness and at high speed.

The disadvantage of these devices is the narrow scope of their application, which limits their use to solve only one specific problem.

AB (Швеция), содержащее блок питания, высокочастотный задающий генератор, широкополосный усилитель мощности, электромагнит с подвижным сердечником, подвижный и неподвижный электроды, а также узел запуска и реле времени. Высокочастотный генератор, усилитель и электромагнит подключены к блоку питания через сетевой выключатель, а выход усилителя мощности соединен со сварочными электродами через коаксиальный кабель. Подвижный сердечник электромагнита механически связан с подвижным сварочным электродом. Узел запуска обеспечивает включение задающего генератора, широкополосного усилителя и электромагнита в начале процесса сварки, а реле времени их отключение после истечения выдержки времени и окончания процесса сварки [2].A device for sealing tubes of polyvinyl chloride Biosealer 800 company Ljungberg &

AB (Sweden), containing a power supply unit, a high-frequency master oscillator, a broadband power amplifier, a movable core electromagnet, movable and fixed electrodes, as well as a start unit and a time relay. The high-frequency generator, amplifier and electromagnet are connected to the power supply through a network switch, and the output of the power amplifier is connected to the welding electrodes through a coaxial cable. The movable core of the electromagnet is mechanically connected to the movable welding electrode. The start-up unit provides the inclusion of a master oscillator, a broadband amplifier and an electromagnet at the beginning of the welding process, and the time relay turns them off after the time delay and the end of the welding process [2].

The disadvantage of this device is its relative complexity, as well as insufficient strength and durability of the weld.

A known method of sealing plastic containers for storing and processing blood (see RU, 2171669, class A 61 J 1/05, 08/10/2001) and a device for implementing the method. The device comprises a clamping unit (polymer film compression), an electric oscillation generator, an ultrasonic vibrating system, a tube presence recording unit, and an automation unit.

The disadvantage of this device is the lack of a dosing mechanism for the material.

Closest to this technical solution is a device for dispensing infusion solutions into polymer containers and sealing them, containing a housing, a solution tank, a pump, a fitting and a control unit connected to a power source and a pump (EP, 0757096 A2, class A 61 J 1/05, 02/05/1997).

The disadvantage of this device is the great complexity, the lack of a mechanism for sealing containers and an appropriate control system.

The technical result to which the invention is directed is to eliminate the above disadvantages.

The specified technical result is achieved in that the device for dispensing infusion solutions into polymer containers and sealing them, comprising a housing, a solution tank, a pump, a fitting and a control unit connected to an electric power source and a pump, comprises a stand, a dispensing unit including a tube made of a polymer material, installed between the pump and the fitting, an electromagnet with a movable core, a movable pinch element, mechanically connected with the movable core of the electromagnet and fixed the second pinch element mounted on the housing, a sealing unit including a high-frequency generator, an additional electromagnet with a movable core, a movable welding electrode mechanically connected to the movable core of the electromagnet, a stationary welding electrode connected to the housing, the first and second time relays, and also, the position sensor of the tube of the polymer container, the third and fourth time relays, the control unit, the dosing unit and the sealing unit are fixed on the rack, the pipe position sensor and mounted on the nozzle of the dosing unit and electrically connected to the control unit, pinch elements are installed between the pump and the nozzle, the electromagnet connected to the pinch elements of the tube is connected to the control unit through the third time relay, the delay time of which is selected longer than the delay time of the fourth time relay, through which a sealing block is connected to the control unit.

The specified technical result is also achieved by the fact that the time delay of the first time relay of the sealing unit, connected between the power source and the high-frequency generator, is 10-60% less than the time delay of the second time relay, connected between the power source and the additional electromagnet, and the delay in turning on the fourth time relay is longer 20% delay on the third time relay.

The drawing shows a structural diagram of a device for dispensing infusion solutions into polymer containers and their sealing.

In the drawing, the following notation:

1 - housing;

2 - a reservoir with a solution;

3 - pump;

4 - fitting;

5 - control unit;

6 - power source;

7 - a rack;

8 - dosage unit;

9 - a tube of polymeric material;

10 - an electromagnet;

11 - movable pinch element;

12 - fixed pinch element;

13 - tube position sensor;

14 - block sealing;

15 - high-frequency generator;

16 - additional electromagnet;

17 - movable welding electrode;

18 - stationary welding electrode;

19 - the first time relay;

20 - second time relay;

21 - the third timer;

22 - fourth time relay.

A device for dispensing infusion solutions into polymer containers and sealing them, contains a housing 1, a reservoir with a solution 2, a pump 3, a fitting 4 and a control unit 5 connected to a power supply 6 and a pump 3. The device contains a rack 7 and a dispensing unit 8, including a tube 9 of polymer material installed between the pump 3 and the fitting 4, an electromagnet 10 with a movable core, a movable pinch element 11, mechanically connected to a movable core of an electromagnet and a stationary pinch element 2 replicated on the body.

On the fitting 4 of the dosing unit, a position sensor of the tube 13 of the polymer container is fixed, which is electrically connected to the control unit 5.

The device also contains a sealing unit 14, which includes a high-frequency generator 15, an additional electromagnet 16 with a movable core, a movable welding electrode 17 mechanically connected to the movable core of the electromagnet, a stationary welding electrode 18 connected to the housing, the first 19 and second 20 timers .

The device also includes the third 21 and fourth 22 time relay. The control unit 5, the metering unit 8 and the sealing unit 14 are mounted on the stand 7, the pinch elements 11 and 12 are installed between the pump 3 and the fitting 4, the electromagnet 10 connected to the pinch elements of the tube is connected to the control unit through the third time relay 21, the delay time of which it is chosen longer than the delay time of the fourth time relay 22, through which the sealing block is connected to the control unit.

In the particular case of the device for dispensing, the time delay of the first time relay 19 of the sealing unit, connected between the power source 6 and the high-frequency generator 15, is 10-60% less than the time delay of the second time relay 20, connected between the power source 6 and the additional electromagnet 16, and the delay turning on the fourth time relay 22 is 20% longer than the delay on turning on the third time relay 21.

In the drawing, the connection of the power source 6 with the elements of the device is not shown.

A device for dispensing infusion solutions in polymer containers and their sealing works as follows.

A polymer container is placed in advance in the device so that the container tube is put on the fitting 4 (automatic delivery of containers to the device is also possible). At the same time, the position sensor of the tube 13 provides a signal for the presence of the container to the control unit 5, which allows subsequent operations.

If there is a position signal of the tube of the polymer container, the signal from the control unit 5 includes a pump 3, which delivers a certain portion of the infusion solution from the solution tank 2 to the polymer container.

After the time required for filling the container and determined by the third time relay 21, the electromagnet 10 is turned on and the pinch elements 11 and 12 pinch the polymer tube 9, the pump stops.

After the time delay determined by the fourth time relay 22, the signal from the control unit is fed to the input of the sealing unit, in particular to the control inputs of the first time relay 19 and the second time relay 20. The first time relay 19 connects the high-frequency generator 15 to the power supply 6. From the output high-frequency generator high-frequency power through a movable welding electrode 17 is transmitted to the welded material of the container.

At the same time, the second time relay 20 connects an additional electromagnet 16 to the power supply 6. The electromagnet is turned on and, with its movable core, acts on the movable welding electrode 17, which compresses the materials being welded.

Under the influence of a high-frequency electromagnetic field, the welded polymer materials are heated and melted. When heating and compressing polymeric materials, their welding process takes place.

After a predetermined time delay determined by the first time relay 19, the high-frequency generator 15 is turned off, however, the electromagnet 16 remains on and its movable core through the movable electrode 17 still squeezes the welded material of the container, as a result of which polymerization occurs under pressure.

After turning off the high-frequency generator 15, the welded material cools. In this case, movable 17 and fixed 18 welding electrodes made of metal are heat sinks.

After the time delay of the second time relay 20, it turns off and disconnects the electromagnet 16 from the power supply 6. Electromagnet 16 releases the core and releases the welded material of the container.

This completes the process of filling the container and sealing it and the container is removed from the device.

The ratio of the time delays of the aforementioned time relays is determined empirically and allow for reliable sealing of the container.

The aforementioned embodiment of the device for dispensing infusion solutions into polymer containers makes it possible to dispense infusion solutions into polymer containers and sealing them at pharmaceutical enterprises, as well as in production pharmacies and medical research institutions.

Currently, a prototype device has been manufactured. The device has small dimensions, made in the desktop version. In its manufacture, standard elements manufactured by the industry were used.

Literature

1. Gevorgyan V.G. Fundamentals of welding. M., “Higher School”, 1991, p.

AB (Швеция), 1991 г.2. Technical description and operating instructions for the device for sealing tubes of polyvinyl chloride Biosealer 800 company Ljungberg &

AB (Sweden), 1991

Claims (2)

1. A device for dispensing infusion solutions into polymer containers, comprising a housing, a reservoir with a solution, a pump, a fitting and a control unit connected to a power source and a pump, characterized in that it comprises a rack, a dispensing unit including a tube made of a polymer material, installed between the pump and the fitting, an electromagnet with a movable core, a movable pinch element mechanically connected to the movable core of the electromagnet and a fixed pinch element mounted on the housing, a sealing lock, which includes a high-frequency generator, an additional electromagnet with a movable core, a movable welding electrode mechanically connected to the movable core of the electromagnet, a stationary welding electrode connected to the housing, the first and second time relays, as well as the position sensor of the polymer container tube, the third and the fourth timer, moreover, the control unit, the dosing unit and the sealing unit are fixed on the rack, the tube position sensor is mounted on the fitting of the dosing unit and it is connected to the control unit, pinch elements are installed between the pump and the fitting, the electromagnet connected to the tube clamping elements is connected to the control unit through a third time relay, the delay time of which is selected longer than the delay time of the fourth time relay, through which it is connected to the control unit sealing block. 2. The device according to claim 1, characterized in that the time delay of the first time relay of the sealing unit connected between the power source and the high-frequency generator is 10-60% less than the time delay of the second time relay connected between the power source and the additional electromagnet, and the delay is the fourth time relay is 20% longer than the delay on the third time relay.