SU1624305A1 - Sample collector - Google Patents

Abstract

Describing refers to the technique of sampling and can be used in the chemical, biochemical, pharmacological, and other industries for dispensing liquids in an automatic mode. The aim of the invention is to improve the metering accuracy, ease of operation, as well as simplify the design. The fraction collector contains a cassette with test tubes mounted on a guide, a dropper, a control unit and a cassette drive mechanism. The tubes are placed in a flexible tape rack, and the drive mechanism is equipped with an asterisk with depressions made along the radius of the tubes, installed with the possibility of interaction with the tubes. High metering accuracy is provided by a spring-loaded pressure roller. 5 il. (/

Description

The invention relates to a sampling technique and can be used in the chemical, biochemical, pharmacological and other sectors of industry for dispensing liquids in containers in an automatic mode.

The purpose of the invention is to improve dosing accuracy, ease of operation, as well as simplify the design.

FIG. 1 shows a fraction collector, general view; in fig. 2 is a view A of FIG. 3 is a section BB in FIG. 4 - flexible tape rack with tubes; figure 5 - various stages of the collector.

The fraction collector contains an electronic unit I associated with a cassette drive mechanism, a cassette 2 with test tubes 3 mounted on the direction in FIG. in fig.

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Figure 4, and the dropper 5, placed in the holder 6 above the filled test tube. The cassette drive mechanism includes an asterisk 7 with depressions made along the diameter of the tubes 3, and a spring-loaded pressure roller 8. The tubes 3 are installed in a flexible tape stand 9 in increments equal to the pitch of the sprockets. The clamping roller 8 is mounted on the rod 10 located above the cartridge 2 with the test tubes 3 and fixed on the guide 4.

The device works as follows.

Before launching the fraction collector, a cassette 2 with empty test tubes 3 is installed on the guide 4. The cassette 2 is brought close to the sprocket 7. When the drive triggers a command from the electronic unit I

The first tube 3 of the tape rack 9 is caught by the protrusion of the sprocket 7 and is moved to the working area. When this roller 8 under the action of the spring tightly presses the tube 3 to the arcuate depression of the sprocket 7, securely fixing the tube in the working area. At this moment, the command from the electronic unit I to the dropper 5 is sent to supply the liquid to the tube.

Upon expiration of the preliminarily time interval given on the electronic unit 1, the value of which is determined by the size of the sample being taken (fluid dose), the drive mechanism is turned on, and the sprocket 7 rotates through an angle corresponding to its step, moving the test tube with liquid D left from the rod 10 (Fig. 5) part of the cassette 2, at the same time capturing the next test tube in the flexible tape rack 9, installs it in the working area. At the same time, under the action of a tube with a dose of liquid released from the recess of the sprocket 7, to the front wall of the cassette 2, the latter moves forward along the guide 4

As the liquid tubes in the left part (according to the scheme) of the cash register accumulate, due to their effect on the front wall of the cartridge 2 and the bar 10, they move the cartridge along the guide 4 until the test tubes of the flexible tripod 9 are completely transferred from the right one (according to the diagram) parts of the cassette in the left. Thus, the tube cassette, which is not directly connected to the drive mechanism, passes along the working area of the collector a path equal to its length.

After the sampling cycle is complete, the cartridge with the tubes filled with liquid is removed and a new cartridge is installed with the tubes empty. The fraction collector is ready for the next sampling cycle.

The invention allows to significantly simplify the cassette drive mechanism by eliminating complex kinematic links and providing mediated (through test tubes in a flexible tripod) connection of the drive cartridge to the sprocket, increasing the accuracy and reliability of fixing the test tube in the working area by tightly pressing the test tube to the sprocket of the sprung clamped roller, as well as to create additional conveniences in the operation of the collector, consisting in the simplicity of preparing the device for operation and maintenance.

Claims (1)

Invention Formula A fraction collector containing a tube cartridge mounted on a guide, a cartridge drive mechanism, a dropper and a control unit associated with the cartridge drive mechanism, characterized in that, to improve metering accuracy, ease of operation and simplify the design, the drive mechanism is equipped with ; wives with an asterisk with cavities made along the radius of the test tubes and installed with the possibility of interaction with the test tubes, the test tubes are installed in a flexible tape stand with a step equal to the step of the spikes of the asterisk, and the collector is equipped with a spring-loaded pressure roller mounted on a rod mounted on the guide above the cartridge with test tubes at the same level with an asterisk with the ability to interact with the test tube located above the dropper. oo oef qorvzgi VQHB I gff I SS 55 T V 9 FIG. four