WO2020081039A1

WO2020081039A1 - Device for metering small volumes of fluid

Info

Publication number: WO2020081039A1
Application number: PCT/UA2019/000090
Authority: WO
Inventors: Роман Викторовыч ЖАЛИНСЬКЫЙ; Руслан Викторовым ЖАЛИНСЬКЫЙ
Original assignee: Роман Викторовыч ЖАЛИНСЬКЫЙ; Руслан Викторовым ЖАЛИНСЬКЫЙ
Priority date: 2018-10-16
Filing date: 2019-07-04
Publication date: 2020-04-23
Also published as: UA130947U

Abstract

A device for metering small volumes of fluid comprising: a horizontally arranged drum (1) with a plurality of containers (16) containing a fluid, said drum rotating with the aid of a stepper motor (3) and a gear (4); a metering mechanism (12) which is reciprocally moveable with the aid of a stepper motor (6) connected to a worm shaft (5); a module for the vertical movement of a metering vessel (18), and a control system. The module for the vertical movement of a metering vessel (18) consists of a lift (20) which is reciprocally moveable with the aid of a stepper motor (7) connected to a worm shaft (19). The dosing mechanism comprises a piston assembly (13), in which a piston rod (14) is configured for vertical movement, the movement being registered by an end sensor (11), and the control system comprises a control board (9) which is linked to the stepper motors (3), (6), (7) and to at least four end sensors (2), (8), (10), (11).

Description

Device for dispensing small volumes of liquid

The utility model is intended for use in the field of automatic dosing in technological processes of the chemical, food and other industries where it is necessary to maintain the accuracy of dosing, changing the dosing value during operation. More specifically, the device can be used to dispense gels and nail polishes.

A device for dispensing a plurality of liquids is known from the prior art (Patent US20070044863A1, IPC B01F15 / 00194, priority date: 10.27.2003), including several pumps that have connectors for connection to the corresponding pump, a container that contains liquid, and includes a second part of the connector, and at least one “starting device” for disconnecting the container from the connector. This device is quite massive and is not intended for dispensing small volumes of liquid. Also, due to the large volume of components, each container has its own pump, which complicates the design.

Known user system for creating nail polish (Patent US20110226803A1, IPC A45D44 / 005, priority date: 03/22/2010), which includes a user interface that allows the user to choose the color of nail polish; a processor that can get nail polish color choices through an interface. It also includes a drum in which containers with liquid are located, and each container has its own piston for discharging liquid. The device is also equipped with a separate mixer and a container for cleaning, which greatly complicates the design.

The utility model is based on the task of creating a device for dispensing small volumes of liquid, in which by introducing additional elements into the design, their new relationship with each other and other elements, the accuracy of measuring the required volume of liquid, reducing the metering error and automatic removal of a drop of dosed substance from the needle is ensured.

The problem is solved in that the proposed device for dispensing small volumes of liquid, which contains a horizontally located drum 1 with many containers 16 with liquid, which rotates using a stepper motor 3 and gear 4, the dispensing mechanism 12, the reciprocating movement of which is carried out using a stepper motor 6, which is connected to the worm shaft 5, a module for vertically moving the metering tank 18 and a control system in which, according to a utility model, a module for I vertical movement of the container for dispensing consists of an elevator 20, the reciprocating movement of which is carried out using a stepper motor 7, which is connected to the worm shaft 19, the dispensing mechanism 12 includes a piston assembly 13, in which the piston rod 14 is made with the possibility of vertical movement, which will be fixed by the end sensor 11, and the control system includes a control board 9, which is connected by stepper motors 3, 6, 7 and with at least four end sensors 2, 8, 10, 11.

In addition, 3-50 ml technical syringes were used as containers 16.

In addition, plastic tubes with a volume of 0.1 ml or more were used as the dosing tank 18.

In addition, the device is equipped with a protective cover 23.

In addition, the control system is connected to user devices through at least one communication channel.

In addition, the control system includes a control tool made in the form of a button or buttons and / or in the form of a keyboard, which is touch-sensitive or made with touch-screen support and is interactive, and / or said control tool made in the form of an electronic touch display, which is liquid crystal or LED. The proposed utility model is illustrated by the drawing, in which Fig. 1 shows the appearance of a dispensing device, Fig. 2 shows a device without a lid, Fig. 3 shows a device without a lid and a drum, Fig. 4 shows a dispensing mechanism (general view), in Fig.5 is a dosing mechanism with detailing of the elements, in Fig. b-A is a technical syringe (general view), in Fig. b-b is a technical syringe (longitudinal section), in Fig. 7 is a test tube, in Fig. 8 - a module for the vertical movement of the container, in Fig.9 A-F - the placement of the piston, rod, syringe and test tube at different stages of dispensing.

A device for dispensing small volumes of liquid (as shown in FIGS. 1-9) comprises a horizontally located drum 1 with a plurality of containers with liquid. The drum rotates in the horizontal plane with the help of gear gear 4, which is connected to the shaft of the stepper motor 3. The device includes:

- a dispensing mechanism 12, the reciprocating movement (in the vertical direction) of which is carried out using a stepper motor 6, which is connected to the worm shaft 5, and the dispensing mechanism 12 includes a piston assembly 13, in which the piston rod 14 is made with the possibility of vertical movement, which is fixed by the end sensor 11;

- a module for the vertical movement of the container 18 for dispensing, which consists of an elevator 20, reciprocating movement (in the vertical direction), which is carried out using a stepper motor 7, the shaft of which is connected to the worm shaft 19.

To determine the position of the movable elements of the device, end sensors 2, 8, 10, 11 are used, for example, they can be end optical sensors "TCST2103".

The end sensor 2 is designed to determine the position of rotation of the drum 1. The end sensor 8 is intended to determine the position of the lifting capacity of the tube (test tube) 18. The end sensor 10 is designed to determine the position of the lifting of the metering mechanism. The final sensor 11 is designed to determine the amount of fluid 21 in the syringe 16. To control the operation of the device, a control system is provided, which includes a control board 9, which is connected with stepper motors 3, 6, 7 and with at least four end sensors 2, 8, 10, 11. The control system may include control means made in the form buttons or buttons, and / or in the form of a keyboard, which is touch-sensitive or made with touch-screen support and is interactive and / or a control tool made in the form of an electronic touch display that is liquid crystal or LED nym.

One of the differences of the proposed device is that technical containers with a volume of 3-50 ml are used as containers 16 for liquid. Dispensing fluid is inside the syringes. Also, plastic tubes with a volume of 0.1 ml or more were used as the dosing tank 18. The device operator can buy as already filled syringes, and manually fill them with the necessary components. Using, as containers, syringes for liquids provides a reduction in the size of equipment and the ability to measure small doses of liquid.

In a static state, the drum 1 is in its starting position, which is determined by the final optical sensor 2. Syringes 16 with liquid for dispensing 21 are in the drum 1, in special recesses. The dosing module (Fig. 4) is raised as high as possible, the position is determined by the final optical sensor 10, while between the piston rod 14 and the drum 1 there must be a gap for free rotation of the drum 1. The holder (elevator) of the tube 20 is lowered as far down as possible could easily place the test tube 18 in it.

A device for dispensing works as follows. After turning on the device or after dispensing the liquid, drum 1, the dispensing mechanism 12, and the tube tubes 20 are sent to their starting positions until the end sensors 2, 8, 10 work. The rotation of the drum 1 is due to the stepper motor 3 and the rotation gear of the drum 4. The rise of the dispensing mechanism 12 is due to the stepper motor 6, which is connected to the worm shaft 5. The tube 20 elevator is also lowered thanks to the stepper motor 7, which is connected to the worm shaft 19. After the elements 1, 12, 20 have taken their positions, the operator selects the required number of doses of liquid through, for example, a touch screen (not shown) or the Internet. Further, the control board 9 begins to control the stepper motors. Further, the drum 1 should turn so that the necessary syringe 16 (with the necessary liquid) is above the tube 18. The elevator of the tube 20 rises to such a height that the edge of the needle 17 is in the tube 18.

Before dosing, the piston 13, one of the syringes 16 and the tube 18 are in the same vertical line (Fig. 9-A). The syringe 16 is changed by rotating the drum 1 in a horizontal plane, using a gear gear 4, which is mounted on the shaft of the stepper motor 3. The tube 20 is lifted and lowered by the worm shaft 19 using the stepper motor 7. The control board 9 is responsible for controlling the motors she also receives signals from the end sensors. Ready-made recipes for dosing, for example, formulas for paints / varnishes / perfumes, can be stored in the memory of the control board. The operator through the touch screen or the Internet can select the desired recipes (if any) or make their own. The device body and cover 23 (FIG. 1) can be made, for example, of metal, plastic, wood, or combinations thereof.

The dosing process consists of several sequential steps. After the drum 1 has returned to the desired position, the control board 9 instructs the stepper motor 7 to raise the tube 20 elevator to such a height that the needle 17 is inside the tube 18 (Fig. 9-B). Further, the control board 9 instructs the stepper motor 6 to smoothly lower the dispensing mechanism. Inside the hollow piston assembly (piston) 13 there is a piston rod 14. As the dispensing module is lowered (Fig. 4), the piston rod 14 abuts the piston of the syringe 15 and begins to be pushed up until it hides inside the piston 13 (Fig. 9-B). At this moment, the final sensor 11 detects that the rod 14 has risen to a sufficient height, a signal is sent to the control board 9 and this indicates that the liquid level in the syringe is determined and dosing can begin. Pay control, according to the formula or the value noted by the operator, further lowers the dispensing mechanism to the desired height and therefore the piston 13 begins to press on the piston of the syringe 15 and squeeze the required amount of liquid 21 from the syringe 16 into the tube 18 (Fig. 9-D). Then, the control board gives the command to lift the tube 20 elevator to the calculated height (based on the volume of the dosed liquid) so that a possible drop on the tip of the needle 17 touches the liquid 22 inside the tube (Fig. 9-D). This action provides automatic cleaning of the needle from residual liquid. Next, the tube lifter 20 and the dispensing mechanism 12 are returned to the starting position (Fig. 9-G) and the operation is repeated as many times as necessary.

The simplicity of the design, ease of manufacture, reliability in operation are the basis for widespread use of the proposed dispenser for the packaging of small volumes of liquid.

From the above it follows that the manufacture of this device in an industrial way does not cause complications, involves the use of developed materials and standard equipment, which indicates the conformity of the technical solution, which is claimed, with the patentability criterion of "industrial applicability".

Claims

Formula

1. A device for dispensing small volumes of liquid, which contains:

a horizontally located drum (1) with a plurality of containers (16) with liquid that rotates with the help of a stepper motor (3) and gears (4);

dosing mechanism (12), the reciprocating movement of which is carried out using a stepper motor (6), which is connected to the worm shaft (5);

module for vertical movement of the container (18) for dispensing and control system,

which differs in that the module for vertical movement of the container (18) for dispensing consists of an elevator (20), the reciprocating movement of which is carried out using a stepper motor (7), which is connected to the worm shaft (19), the dispensing mechanism (12) includes a piston assembly (13), in which the piston rod (14) is made with the possibility of vertical movement, the movement of which is fixed by the end sensor (11), and the control system includes a control board (9), which is connected by stepper motors (3), (6) , (7) and with at least four end sensors (2), (8), (10), (11). ₍

2. The device according to claim 1, characterized in that technical containers with a volume of 3-50 ml are used as containers (16).

3. The device according to claim 2, characterized in that plastic tubes with a volume of 0.1 ml or more are used as a container (18) for dosing.

4. The device according to claim 3, characterized in that it is equipped with a protective cover (23).

5. The device according to claim 4, characterized in that the control system is connected to user devices through at least one communication channel.

6. The device according to claim 5, characterized in that the control system includes a control tool made in the form of a button or buttons, and / or in the form of a keyboard, which is touch-sensitive or made with touch-screen support and is interactive, and / or the specified control tool is made in the form of an electronic touch screen, which is a liquid crystal or LED.