JPH02277564A - Batch type centrifugal separator - Google Patents

Abstract

PURPOSE:To obtain the batch type centrifugal separator which is allowed to carry out washing almost automatically by making the rotor in a backet type and providing a supernatant liquid sucking pipe, a sucking-off pipe and a washing liquid blowing nozzle which is allowed to insert fro a central opening. CONSTITUTION:The rotor consists of a bottom plate 12 connected with a driving shaft 10, an upper plate 16 having the opening 18 in the central part, and a peripheral wall 14, and the sucking pipe 22, a remained liquid sucking-off pipe 24 and the washing liquid blowing nozzle 26 are inserted and taken off at the suitable timing through the central opening 18. By the revolution of the driving shaft 10, sample is pressed to the peripheral wall 14 to be made in an annular shape, and the separation is carried out due to the specific gravity of the contents, and the supernatant liquid is removed by inserting the sucking pipe 22 of almost U-shape through the opening 18. Then, the revolution of the roter is stopped, and the supernatant liquid remained on the bottom plate 12 is sucked off by inserting the sucking-off pipe 24, and then, the nozzle 26 is inserted while the roter is revolved in a low speed, and raised while blowing the washing liquid to the sediment on the peripheral wall 14 to exfoliate the sediment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a centrifuge, and more particularly to a batch centrifuge that can automatically take out a sample washed within the centrifuge.

(Prior Art) A typical conventional centrifugal separator has a rotor made of a plate material around which a plurality of buckets are held so as to be able to swing, and a well-balanced sample is placed in each of the buckets. A rotor was rotated to perform the specified separation by placing the container containing the liquid.

[Problem that the invention seeks to solve]

Although such centrifugal separators are effective for separating small samples, the large number of manual steps makes them extremely inefficient for large sample volumes. Gelatinous particles (Special Publication No. 63-292
If washing (particle size adjustment, removal of microparticles) such as particles (such as those described in No. , centrifugation, removal of supernatant, dispensing a small amount of washing solution, manual loosening of sediment, volume up, stirring, balance again, centrifugation, removal of supernatant, repeating of dispensing washing solution, and then sample removal. , several people per day, several ±
It can only process about 2.

An object of the present invention is to provide a batch type centrifugal machine that can almost completely automate such washing.

[Means for Solving the Problems] According to the present invention, the rotor of a centrifuge is formed into a bucket shape formed by a peripheral wall, an upper plate having an opening in the center, and a bottom plate connected to a rotational drive shaft. , a supernatant liquid suction pipe that is movable from this central opening in the direction of the peripheral wall, a suction pipe that can be lowered from this central opening almost to the bottom plate, and a cleaning liquid that is movable vertically along the peripheral wall from this central opening. A spray nozzle is provided.

[Effect]

Inject the liquid sample through the central opening and immediately centrifuge it. Before the end of this separation, the supernatant liquid is removed by removing the supernatant liquid suction pipe, the rotation of the rotor is stopped, and the remaining supernatant liquid is removed by the suction pipe.

Thereafter, while rotating the rotor at a low speed, a cleaning liquid is sprayed onto the sediment on the peripheral wall using a nozzle to peel off the sediment and take it out. If necessary, this may be appropriately dispersed in a washing liquid, centrifuged, and this may be repeated a predetermined number of times. or,
Sediment can also be peeled off by suddenly changing the speed from high speed to low speed using inertia.

〔Example〕

FIG. 1 is a longitudinal cross-sectional view of the centrifuge of the present invention in a state where a sample is injected. As shown, the drive shaft 10
A rotor is formed by a bottom plate 12 connected to the rotor, a top plate 16 having an opening 18 in the center, and a peripheral wall 14.

A suction pipe 22 (Fig. 3), a residual liquid suction pipe 24 (Fig. 4), and a cleaning liquid spray nozzle 26 (Fig. 5) are inserted and removed from this central opening 18 at appropriate timings. It is provided.

In operation, the sample 20 is placed directly into this rotor. In this state, the sample 2° is in the state shown in Fig. 1, and due to the rotation of the rotating shaft 1o, the sample is pressed against the peripheral wall 14 and becomes a ring shape as shown in Fig. 2, and due to the specific gravity of the contents, it becomes Street segregation takes place.

In this state, the approximately U-shaped suction pipe 22 is passed through the opening 18 to suction and remove the supernatant liquid.

This is shown in FIG.

Thereafter, the rotation of the rotor is stopped, and the remaining supernatant liquid accumulated on the bottom plate 14 is sucked out by manually using the suction pipe 24 in the same manner. This is shown in FIG.

Thereafter, while rotating the rotor at a low speed, the nozzle 26 is moved upward while spraying the cleaning liquid onto the sediment on the peripheral wall 14, thereby peeling off the sediment. If necessary, as shown in Figure 6, add sediment to the sprayed cleaning solution using a suitable stirring device 2.
The above-mentioned process may be repeated for a predetermined number of times.

〔Effect of the invention〕

As described above, according to the centrifuge of the present invention, a large amount of samples can be washed in a significantly shorter time than with conventional equipment, and almost all complicated manual work can be omitted. Easy to automate.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the centrifuge of the present invention with a sample injected into the rotor, Fig. 2 is a cross-sectional view during centrifugation, and Fig.
Figure 4 is a similar diagram showing supernatant liquid removal while the rotor is rotating; Figure 4 is a similar diagram showing residual liquid removal after rotor rotation has stopped;
The figure is a similar diagram showing sedimentation separation by a spray nozzle, and FIG. 6 is a similar diagram showing the post-treatment of sedimentation. 10... Rotating shaft, 12... Rotor bottom plate, 14...
Rotor peripheral wall, 16... Rotor top plate, 18... Center opening, 22... Suction pipe, 24... Suction pipe, 2
6... Spray nozzle, 2 days... Stirring device. Patent applicant: Fujirebio Co., Ltd.

Claims (1)

[Claims] (1) A bucket-shaped rotor consisting of a bottom plate connected to the rotational drive shaft, a peripheral wall, and an upper plate having an opening in the center, a suction pipe that can be inserted from the central opening and movable in the direction of the peripheral wall, and the central A batch centrifuge comprising: a suction pipe that can vertically descend from the opening to the bottom plate; and a cleaning liquid spray nozzle that is movable vertically from the central opening along the peripheral wall.