Biological extraction centrifugal separator

Abstract

The utility model discloses a biological extraction centrifugal separator which comprises a machine shell main body and a motor, a turning cover is installed on the top of the machine shell main body, an inner barrel is installed on the upper portion of the machine shell main body, a vertical rotating head assembly is installed in the inner barrel, and the rotating head assembly comprises a rotating shaft and a cross-shaped rotor frame. Four symmetrical hanging cups are installed on the outer side of the rotor frame in a hinged mode, an octagonal prism head is arranged at the upper end of the rotating shaft, the octagonal prism head axially penetrates through the middle of the rotor frame and is fixed to the rotor frame in the circumferential direction, hooks are installed on the inner sides of the hanging cups in a hinged mode, an annular positioning plate is clamped to the upper end of the octagonal prism head, and four evenly-distributed supporting arms are arranged on the outer side of the positioning plate. The outer end of the support arm is provided with a vertically through jack, when the hooks and the jacks are hooked in a one-to-one correspondence manner, the upper end of the hanging cup inclines towards the axis, the positioning plate is located above the rotor frame, the upper end of the octagonal prism head is provided with a gland, two different separation requirements are met by using one instrument, and the purchase cost investment can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal separation equipment, in particular to a biological extraction centrifugal separator. Background Art

[0002] Centrifuges are widely used in research, education, and production sectors such as biology, chemistry, and medicine. They utilize the powerful centrifugal force generated by the high-speed rotation of the rotor to separate liquids from solid particles or components in liquid mixtures, making them suitable for the rapid separation and synthesis of trace samples. Centrifuge rotors are classified as either angle rotors or swing-out rotors. The angle between the centrifuge tubes (containing the solution) and the rotating shaft is determined during rotor manufacture and cannot be changed, typically ranging from 14° to 40°. During centrifugation, the tubes remain in place, while the sample undergoes reorientation, resulting in a low center of gravity. These centrifuges are suitable for high-speed separations but not for large-volume separations. Blow-out rotors, also known as swing-out rotors, house the centrifuge tubes in hanging cups (or baskets) that are axially symmetrically suspended from the rotor. During operation, the hanging cups (or baskets) remain horizontal, at right angles to the bearings, causing the sample to settle and concentrate at the bottom of the tube. These centrifuges are suitable for large-volume separations but not for high-speed separations. Both types of centrifuge rotors have their own advantages and disadvantages, so research departments often require both types of centrifuges, resulting in a high investment in the equipment. Utility Model Content

[0003] The purpose of the present invention is to provide a biological extraction centrifuge to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a biological extraction centrifuge, comprising a casing body and a motor, a flip cover installed on the top of the casing body, an inner barrel installed on the upper part of the casing body, a vertical rotating head assembly installed in the inner barrel, the rotating head assembly comprising a rotating shaft and a cross-shaped rotor frame, four symmetrical hanging cups hingedly installed on the outer side of the rotor frame, an octagonal prism head provided on the upper end of the rotating shaft, the octagonal prism head axially passing through the middle part of the rotor frame and being fixed to the circumference thereof, the inner side of the hanging cup hingedly A hook is installed, and an annular positioning plate is clamped on the upper end of the octagonal prism head. Four evenly distributed support arms are provided on the outside of the positioning plate. The outer ends of the support arms are provided with sockets that pass through up and down. When the hooks are hooked with the sockets one by one, the upper end of the hanging cup is tilted toward the axis center line. The middle parts of the rotor frame and the positioning plate are provided with a regular octagonal hole that passes axially. The positioning plate is located above the rotor frame. A pressure cover is installed on the upper end of the octagonal prism head to apply pressure to the rotor frame and the positioning plate to achieve axial fixation. The lower end of the rotating shaft is connected to the motor shaft through a coupling.

[0005] Preferably, an adapter is inserted into the hanging cup, and the adapter is provided with a plurality of axial slots.

[0006] Preferably, an axial threaded hole is provided in the middle of the upper end of the octagonal prism head, and a through countersunk hole is provided in the middle of the pressure cover, and a hexagon socket bolt is locked between the threaded holes.

[0007] Preferably, a regular octagonal slot is provided on the lower side of the gland, and the top of the octagonal column head is adapted to be snap-fitted into the slot.

[0008] Compared with the prior art, the beneficial effect of the present invention is that the rotating head assembly of the centrifuge can be switched between the angle rotor and the horizontal rotor modes, so that one instrument can meet two different separation requirements, which can greatly reduce the purchase cost of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the exploded structure of the rotating head assembly;

[0011] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating head assembly.

[0012] In the figure: 1. Casing body; 2. Flip cover; 3. Motor; 4. Inner barrel; 5. Rotating head assembly; 51. Rotating shaft; 52. Rotor frame; 53. Hanging cup; 54. Octagonal prism head; 55. Positioning plate; 56. Adapter; 57. Pressure cover; 58. Hook; 59. Socket. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] See also Figure 1-3 The utility model provides a technical solution: a biological extraction centrifuge, including a casing body 1 and a motor 3, a flip cover 2 is installed on the top of the casing body 1, an inner barrel 4 is installed on the upper part of the casing body 1, and a vertical rotating head assembly 5 is installed in the inner barrel 4. The rotating head assembly 5 includes a rotating shaft 51 and a cross-shaped rotor frame 52, and four symmetrical hanging cups 53 are hingedly installed on the outer side of the rotor frame 52. An adapter 56 is stuck in the hanging cup 53, and the adapter 56 is provided with a plurality of axial slots for inserting centrifugal test tubes.

[0015] The upper end of the rotating shaft 51 is equipped with an octagonal prism 54, which axially extends through the middle of the rotor frame 52 and is circumferentially fixed to it. A hook 58 is hingedly mounted on the inner side of the hanging cup 53. The upper end of the octagonal prism 54 is clamped to an annular positioning plate 55. The rotor frame 52 and positioning plate 55 are both provided with a regular octagonal hole axially extending through the middle. The outer side of the positioning plate 55 is equipped with four evenly distributed arms, each with a socket 59 extending vertically through the outer end. When the hook 58 and the socket 59 are connected in a one-to-one correspondence, the upper end of the hanging cup 53 tilts toward the axis, forming an angular rotor. When the arms of the positioning plate 55 are offset by 45° from the hook 58, the hanging cup 53 is free to flip to a horizontal position, forming a horizontal rotor. This allows switching between two rotor modes to meet different usage requirements.

[0016] The positioning plate 55 is located above the rotor frame 52. A pressure cap 57 is installed on the upper end of the octagonal prism 54 to apply pressure to the rotor frame 52 and the positioning plate 55 to achieve axial fixation. The lower end of the rotating shaft 51 is connected to the motor shaft via a coupling. There is an axial threaded hole in the middle of the upper end of the octagonal prism 54, and a countersunk hole is provided in the middle of the pressure cap 57. A hexagon socket bolt is locked between the threaded holes. The lower side of the pressure cap 57 is provided with a regular octagonal slot. The top of the octagonal prism 54 is adapted to fit the slot. After removing the pressure cap 57, the placement angle of the positioning plate 55 can be adjusted to switch between the two modes.

[0017] Working principle: The rotating head assembly 5 of the centrifuge can be switched between the two modes of angle rotor and horizontal rotor, specifically as follows: when the support arm of the positioning plate 55 and the hook 58 are in a 45-degree staggered state (such as Figure 3 As shown in FIG, the hanging cup 53 can be turned over freely, and the rotor frame 52 can swing the hanging cup 53 to the horizontal position by rotating at high speed. When the support arm of the positioning plate 55 is rotated to be opposite to the hook 58, and the hook 58 is hooked on the socket 59 accordingly, an angular rotor can be formed.

[0018] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biological extraction centrifuge, comprising a casing body (1) and a motor (3), wherein a flip cover (2) is installed on the top of the casing body (1), and an inner barrel (4) is installed on the upper part of the casing body (1), characterized in that: A vertical rotating head assembly (5) is installed in the inner barrel (4), and the rotating head assembly (5) includes a rotating shaft (51) and a cross-shaped rotor frame (52). Four symmetrical hanging cups (53) are hingedly installed on the outer side of the rotor frame (52). An octagonal prism head (54) is provided at the upper end of the rotating shaft (51). The octagonal prism head (54) axially penetrates the middle part of the rotor frame (52) and is circumferentially fixed thereto. A hook (58) is hingedly installed on the inner side of the hanging cup (53). An annular positioning plate (55) is clamped on the upper end of the octagonal prism head (54). The positioning plate (55) is Four evenly distributed support arms are provided on the outside, and the outer ends of the support arms are provided with sockets (59) that penetrate upwards and downwards. When the hooks (58) are connected with the sockets (59) in a one-to-one correspondence, the upper end of the hanging cup (53) is inclined close to the axis center line. The middle parts of the rotor frame (52) and the positioning plate (55) are both provided with a regular octagonal hole that penetrates axially. The positioning plate (55) is located above the rotor frame (52). A pressure cover (57) is installed on the upper end of the octagonal column head (54) to apply pressure to the rotor frame (52) and the positioning plate (55) to achieve axial fixation. The lower end of the rotating shaft (51) is connected to the motor shaft through a coupling.

2. A biological extraction centrifuge according to claim 1, characterized in that: An adapter (56) is inserted into the hanging cup (53), and a plurality of axial slots are provided on the adapter (56).

3. A biological extraction centrifuge according to claim 1, characterized in that: The middle part of the upper end of the octagonal column head (54) is provided with an axial threaded hole, and the middle part of the pressure cover (57) is provided with a through countersunk hole, and a hexagon socket bolt is locked between the threaded holes.

4. A biological extraction centrifuge according to claim 3, characterized in that: A regular octagonal slot is provided on the lower side of the pressure cover (57), and the top of the octagonal column head (54) is adapted to be snap-fitted into the slot.

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