RU221536U1 - Laboratory centrifuge - Google Patents

Abstract

A laboratory centrifuge refers to the design of centrifugal-type devices for separating heterogeneous systems and can be used for concentrating and separating microimpurities from samples when analyzing environmental pollution. A laboratory centrifuge contains a rotating hollow drum with a lid and centrifugal valves made in the form of rods with longitudinal grooves and a spring device, and a drive. The drum is equipped with an annular chamber with the ability to connect through a stationary suction tube with a container for collecting the liquid phase. Technical result: reducing the time required to process the mixture by eliminating manual operations to drain the liquid phase.

Description

The utility model relates to the design of centrifugal-type devices for separating heterogeneous systems and can be used for concentrating and separating microimpurities from samples when analyzing environmental pollution.

A “laboratory centrifuge” is known (Patent RU No. 97944 U1, IPC B04B 1/04 - 2010.09.27), containing a housing with a lid, inside which a drum and a drive are installed, characterized in that the housing is made rotating, the drum is removable, equipped with a lid and centrifugal valves containing a rod with a longitudinal groove and a spring device.

The disadvantage of this centrifuge is the need to spend time on manual operations of draining the liquid after stopping the rotation of the drum.

The prototype is a periodic pendulum centrifuge (in the book: Basic processes and apparatus of chemical technology by M.I. Gelperin. M.: Khimiya, 191, P. 242. Fig. V-18a), containing a non-rotating housing, a perforated drum, and a filter partition and drive.

The device has the following disadvantages: ineffective separation and concentration of microimpurities, intended only for filtering suspensions.

The objective of the utility model is to reduce the time required to process the mixture by eliminating manual operations to drain the liquid phase.

The technical result of the utility model is faster processing of the mixture when concentrating and separating microimpurities from samples when analyzing environmental pollution.

The technical problem is solved by the fact that a laboratory centrifuge contains a rotating hollow drum with a lid and centrifugal valves made in the form of rods with longitudinal grooves and a spring device, and a drive; the peculiarity is that the drum is equipped with an annular chamber with the possibility of connection through a stationary suction tubes with a container for collecting the liquid phase.

Details, features, as well as advantages of this utility model follow from the following description of the implementation of the claimed technical solution using a drawing that shows:

Fig. 1 - schematic diagram of a laboratory centrifuge.

In the figures the following positions are indicated by numbers:

1 - rotating drum, 2 - cover, 3 - annular chamber, 4 - suction tube, 5 - centrifugal valves, 6 - rod, 7 - longitudinal groove, 8 - spring device, 9 - container, 10 - electric motor.

The laboratory centrifuge (Fig. 1) consists of a rotating drum 1 with a cover 2, an annular chamber 3 and a suction tube 4. On the cover 2, centrifugal valves 5 are mounted in the radial direction, which are made in the form of a rod 6 with a longitudinal groove 7 and a spring device 8. A container 9 is used to collect the discharged liquid through the suction tube 4. The rotation of the apparatus is carried out by an electric motor 10 with an adjustable speed.

A laboratory centrifuge works as follows. Drum 1 is filled with the mixture to be treated and closed with lid 2, the annular chamber 3 is put on and the suction tube 4 is installed in the working position. The drive 10 is turned on. Under the action of centrifugal forces, the mixture is stratified. The light phase (solvent) forms the inner ring, and the heavy phase (solid sample) occupies the peripheral part. As the working speed of the apparatus increases, the rod 6 of the central channel 5 moves in the radial direction due to the stretching of the spring under the action of centrifugal forces, the longitudinal channel 7 of the rods 6 opens the flow section, which forms a drain hole and the solvent is drained from the rotor into the annular chamber 3, from where it is collected by suction pipe 4 and sent to container 9. In this way, the operations of releasing liquid (solvent) and removing it from the apparatus in automatic mode are combined. After the end of the process, turn off the drive 10, set the suction tube 4 to the non-working position, remove the annular chamber 3 and the drum cover 2, remove the solid phase and wash the contact surfaces with a solvent. The device is ready for use.

Using a utility model allows you to achieve:

- elimination of manual labor in the process of processing the mixture;

- reduction of time for mixture processing;

- simplification of the device design;

- reduction of time for processing mixtures.

Claims (1)

A laboratory centrifuge containing a rotating hollow drum with a lid and centrifugal valves made in the form of rods with longitudinal grooves and a spring device, and a drive, characterized in that the drum is equipped with an annular chamber with the ability to connect through a stationary suction tube with a container for collecting the liquid phase.