CN217431966U - Centrifugal machine for protein separation - Google Patents

Abstract

A centrifuge for protein separation comprises a frame, a shell, a driving mechanism, a braking mechanism and a test tube rack; the machine shell is fixedly arranged on the upper surface of the machine frame, a turnover machine cover is arranged at the top of the machine shell, and a centrifugal bin is arranged in the machine shell; actuating mechanism includes drive assembly, pivot, centrifugal barrel, drive assembly is fixed to be set up in the frame, drive assembly is connected with the lower extreme of pivot, the upper end of pivot is from supreme running through frame, casing in proper order down and stretching into to the centrifugal storehouse in. A centrifuge for albumen separation, structural design is reasonable, cooperatees with arrestment mechanism through actuating mechanism, can realize centrifuge's quick start and quick braking to there are time lag and wearing and tearing problem in the braking of having reduced, the test-tube rack is detachable installs on the pivot top, conveniently puts into, takes out the operation to the test-tube rack, uses the flexibility high, and application prospect is extensive.

Description

Centrifugal machine for protein separation

Technical Field

The utility model relates to a centrifuge technical field, concretely relates to a centrifuge for protein separation.

Background

The protein is a macromolecular organic matter with a complex space structure formed by dehydration and condensation of amino acid, and the main chemical elements of the macromolecular organic matter are about 50 percent of C), about 23 percent of O), about 16 percent of N), about 7 percent of H and about 0 to 3 percent of S). Amino acid is the basic composition unit of protein, and the protein not only has partial physicochemical properties of the amino acid, but also has some commonalities of other organic matters and a plurality of self unique characteristics and properties: high molecular weight, amphoteric dissociation and isoelectric point, hydration, denaturation, and color reaction.

Because the abnormal expression of the protein is closely related to the occurrence and development of various diseases in vivo, the protein can be detected to carry out auxiliary diagnosis on various diseases, and the protein can be suitable for population screening and clinical detection. Protein separation is a common step in protein detection, and is usually performed by using a centrifuge. Centrifuges are machines that utilize centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid.

The centrifugal machine for protein separation in the prior art has the following problems: 1. most braking devices of centrifuges in the prior art adopt a friction braking principle, but friction braking not only has the problems of time lag and abrasion, but also can generate a large amount of friction heat in work, so that the working surface of the braking device generates local high temperature, and the friction device fails; 2. the test tube slot in the inside centrifugal chamber of centrifuge among the prior art is fixed setting usually, inconvenient change, regulation, and it is relatively poor to use the flexibility. Therefore, it is necessary to develop a centrifuge for protein separation to solve the above technical problems.

Chinese patent application number is CN202220011692.X discloses a laboratory centrifuge carousel structure, and the purpose reduces windage and the heat that the centrifuging tube produced when high-speed centrifugation, has protected the centrifuging tube through whole scheme of moulding plastics, does not have time lag problem and wearing and tearing problem, the inconvenient change of test-tube rack, adjusts to friction braking and solves.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome not enough above, the utility model aims at providing a centrifuge for albumen separation, structural design is reasonable, cooperatees through actuating mechanism and arrestment mechanism, can realize centrifuge's quick start and quick braking to there are time lag and wearing and tearing problem in the braking of having reduced, the test-tube rack is detachable installs on the pivot top, conveniently puts into, takes out the operation to the test-tube rack, uses the flexibility high, and application prospect is extensive.

The technical scheme is as follows: a centrifuge for protein separation comprises a frame, a shell, a driving mechanism, a braking mechanism and a test tube rack; the machine shell is fixedly arranged on the upper surface of the machine frame, a turnover machine cover is arranged at the top of the machine shell, and a centrifugal bin is arranged in the machine shell; the driving mechanism comprises a driving assembly, a rotating shaft and a centrifugal barrel, the driving assembly is fixedly arranged on the rack and connected with the lower end of the rotating shaft, the upper end of the rotating shaft sequentially penetrates through the rack and the shell from bottom to top and extends into the centrifugal bin, the centrifugal barrel is sleeved outside the rotating shaft, and the rotating shaft and the centrifugal barrel are coaxially arranged; the braking mechanism comprises braking magnets, rotating magnets and a control device, wherein the braking magnets are uniformly arranged on the inner surface of the centrifugal cylinder body in the circumferential direction around the central axis of the rotating shaft, the rotating magnets are uniformly arranged on the outer surface of the rotating shaft in the circumferential direction around the central axis of the rotating shaft, the mounting heights of the braking magnets and the rotating magnets are the same, the polarities of opposite magnetic poles of the braking magnets and the rotating magnets are the same, and the control device is used for controlling a power supply to input current to the braking magnets and/or the rotating magnets so that the rotating shaft stops rotating relative to the centrifugal cylinder body under the action of magnetic force generated between the braking magnets and the rotating magnets; the upper end of pivot is fixed and is provided with the mount pad, the detachable installation of test-tube rack is on the mount pad.

A centrifuge for albumen separation, structural design is reasonable, cooperatees with arrestment mechanism through actuating mechanism, can realize centrifuge's quick start and quick braking to there are time lag and wearing and tearing problem in having reduced the braking, the casing top is provided with the cover that can overturn, the test-tube rack is detachable installs on the pivot top, the operation is put into, is taken out to the test-tube rack to the convenience.

Furthermore, the above centrifuge for protein separation, the driving assembly includes a driving motor, a main driving wheel, and a driven wheel, the driving motor is fixedly disposed on the frame, an output shaft of the driving motor is in transmission connection with the main driving wheel, the main driving wheel is in transmission connection with the driven wheel through a chain, and a lower end of the rotating shaft is in transmission connection with the driven wheel.

The driving motor is started, and the rotating shaft is driven to rotate through the transmission of the main driving wheel, the auxiliary driving wheel and the chain.

The driving and braking principle of the centrifuge for protein separation is as follows: the driving assembly drives the rotating shaft to rotate, and the rotating shaft drives the mounting seat and the test tube rack on the mounting seat to rotate, so that protein separation is performed on a sample in the test tube on the test tube rack; after the protein separation is finished, the driving component is closed, meanwhile, the control device (which can adopt a singlechip) controls the power supply to input current to the braking magnet arranged on the outer surface of the rotating shaft and/or the rotating magnet arranged on the inner surface of the centrifugal cylinder, the braking magnet and/or the rotating magnet generate magnetic force, because the polarities of the relative magnetic poles of the braking magnet and the rotating magnet are the same, tangential component force along the rotating direction of the rotating shaft can be generated, and the tangential component force can play a role in stopping the rotating shaft from rotating, so that the aim of quickly braking the rotating shaft is fulfilled. If the braking mechanism is not provided, when the driving motor is switched off, the main driving wheel, the auxiliary driving wheel and the rotating shaft can only brake through friction, and the rotating speed is gradually reduced until the rotation is completely stopped.

Furthermore, in the centrifugal machine for protein separation, the bottom of the centrifugal bin is fixedly connected with the inner bottom surface of the machine shell, the top of the centrifugal bin is provided with the opening and the sealing cover matched with the opening, and the sealing cover is provided with the sealing gasket at the contact position with the opening.

The design can ensure that the centrifugal machine keeps a sealing state in the centrifugal bin when in operation.

Furthermore, foretell a centrifuge for protein separation, arrestment mechanism still includes infrared speed probe, infrared speed probe is installed and is used for detecting the slew velocity of pivot at the centrifugation barrel internal surface, infrared speed probe and controlling means communication connection, controlling means controls the power based on the slew velocity change that infrared speed probe detected and to braking magnet and/or rotating magnet input current.

The infrared speed measuring probe is arranged on the inner surface of the centrifugal cylinder body and used for detecting the rotating speed of the rotating shaft, when the control device receives that the infrared speed measuring probe detects that the rotating speed of the rotating shaft is continuously reduced or abnormal, the control device immediately controls the power supply to input current to the braking magnet and/or the rotating magnet, and the rotating shaft is rapidly braked by the aid of the magnetic force of the braking magnet and the rotating magnet.

Further, foretell a centrifuge for albumen separation, the mount pad includes dabber, stopper, location base, the stopper is worn to establish by the lower extreme of dabber and location base top surface fixed connection, the bottom surface and the pivot top surface fixed connection of location base, the test-tube rack is detachable to be installed at the spindle.

Further, the centrifuge for protein separation comprises a fixing platform, a spring clamp, a test tube rack and a test tube fixture block, wherein a through hole for the upper end of the mandrel to pass through is formed in the center of the fixing platform, the spring clamp is fixedly connected to the center of the top surface of the fixing platform and used for clamping the upper end of the mandrel, 2 symmetrical triangular holes are formed in the fixing platform, and the 2 triangular holes are located on two sides of the spring clamp and used for enabling the electric clamping jaws to grab the fixing platform; the test tube hangers are uniformly arranged on the outer surface of the fixed platform in the circumferential direction around the central axis of the fixed platform and are fixedly connected with the fixed platform; every the test tube stores pylon inner wall rotates and is connected with 1 test tube fixture block and is used for blocking the test tube.

Further, foretell a centrifuge for protein separation, the spring card includes mounting, 2 chucking spare, 2 the chucking spare sets up relatively, every the one end of chucking spare all passes through spring fixed connection with the mounting, every the other end of chucking spare sets up to the circular arc concave surface, the mounting passes through the fix with screw at the fixed platform top surface, dabber and chucking spare joint department are provided with ring groove.

The annular clamping groove is formed in the joint of the mandrel and the clamping piece, the through hole of the fixing platform penetrates through the upper end of the mandrel, and after the upper end of the mandrel sequentially penetrates through the through hole and the channels between the clamping pieces 2, the annular clamping groove of the mandrel is clamped in the arc concave surface of the clamping piece, so that the fixing effect is achieved. Spring fixed connection is all passed through with the mounting to the one end of chucking spare, and after the cylindric clamping jaw of electronic clamping jaw inserted triangle hole, the clamping jaw was closed together, and its extrusion force made chucking spare open to thereby can upwards mention the test-tube rack and take out the test-tube rack.

The beneficial effects of the utility model are that: the centrifuge for protein separation has reasonable structural design, can realize the quick start and the quick brake of the centrifuge by matching the driving mechanism with the braking mechanism, and reduces the time lag and the abrasion problem of the brake; the detachable installation of test-tube rack is on the pivot top, and the operation of putting into, fixing, taking out can easily be put into to the test-tube rack to the electronic clamping jaw of cooperation, and the convenience is carried out the test tube to the test-tube rack and is fixed, the test tube takes off and the test-tube rack is changed, operation such as washing, maintenance, uses the flexibility high, and application prospect is extensive.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the centrifuge for protein separation according to the present invention (without a test tube rack);

FIG. 2 is a schematic view of the centrifuge for protein separation according to the present invention with a test tube rack mounted on a rotating shaft;

FIG. 3 is a structural diagram of a braking mechanism of the centrifuge for protein separation according to the present invention;

FIG. 4 is a top view of the braking magnets and the rotating magnets of the centrifuge for protein separation according to the present invention;

FIG. 5 is a schematic structural view of a mounting seat of the centrifuge for protein separation according to the present invention;

in the figure: the test tube test machine comprises a frame 1, a machine shell 2, a machine cover 21, a centrifugal bin 22, a sealing cover 221, a sealing gasket 222, a driving mechanism 3, a driving assembly 31, a driving motor 311, a main driving wheel 312, a secondary driving wheel 313, a chain 314, a rotating shaft 32, a centrifugal cylinder 33, a mounting seat 34, a mandrel 341, an annular clamping groove 3411, a limiting block 342, a positioning base 343, a braking mechanism 4, a braking magnet 41, a rotating magnet 42, a control device 43, a power supply 44, an infrared speed measuring probe 45, a test tube rack 5, a fixed platform 51, a through hole 511, a triangular hole 512, a spring clamp 52, a fixed part 521, a clamping part 522, a test tube rack 53 and a test tube clamping block 54.

Detailed Description

The invention will be further elucidated with reference to the accompanying figures 1-5 and the specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The centrifuge for protein separation with the structure as shown in fig. 1, 2, 3, 4 and 5 comprises a frame 1, a casing 2, a driving mechanism 3, a braking mechanism 4 and a test tube rack 5; the machine shell 2 is fixedly arranged on the upper surface of the machine frame 1, a reversible machine cover 21 is arranged at the top of the machine shell 2, and a centrifugal bin 22 is arranged in the machine shell 2; the driving mechanism 3 comprises a driving component 31, a rotating shaft 32 and a centrifugal barrel 33, the driving component 31 is fixedly arranged on the rack 1, the driving component 31 is connected with the lower end of the rotating shaft 32, the upper end of the rotating shaft 32 sequentially penetrates through the rack 1 and the shell 2 from bottom to top and extends into the centrifugal bin 22, the centrifugal barrel 33 is sleeved outside the rotating shaft 32, and the rotating shaft 32 and the centrifugal barrel 33 are coaxially arranged; the braking mechanism 4 comprises braking magnets 41, rotating magnets 42 and a control device 43, wherein a plurality of the braking magnets 41 are circumferentially and uniformly arranged on the inner surface of the centrifugal cylinder 33 around the central axis of the rotating shaft 32, a plurality of the rotating magnets 42 are circumferentially and uniformly arranged on the outer surface of the rotating shaft 32 around the central axis of the rotating shaft 32, the installation heights of the braking magnets 41 and the rotating magnets 42 are the same, the polarities of the opposite magnetic poles of the braking magnets 41 and the rotating magnets 42 are the same, and the control device 43 is used for controlling a power supply 44 to input current to the braking magnets 41 and/or the rotating magnets 42, so that the rotating shaft 32 stops rotating relative to the centrifugal cylinder 33 under the action of magnetic force generated between the braking magnets 41 and the rotating magnets 42; the upper end of pivot 32 is fixed and is provided with mount pad 34, the detachable installation on mount pad 34 of test-tube rack 5.

In addition, the driving assembly 31 includes a driving motor 311, a main driving wheel 312 and a secondary driving wheel 313, the driving motor 311 is fixedly disposed on the frame 1, an output shaft of the driving motor 311 is in transmission connection with the main driving wheel 312, the main driving wheel 312 is in transmission connection with the secondary driving wheel 313 through a chain 314, and a lower end of the rotating shaft 32 is in transmission connection with the secondary driving wheel 313.

Further, the bottom of the centrifugal bin 22 is fixedly connected with the inner bottom surface of the casing 2, the top of the centrifugal bin 22 is provided with an opening and a sealing cover 221 matched with the opening, and a sealing gasket 222 is arranged at the contact position of the sealing cover 221 and the opening.

Further, the brake mechanism 4 further comprises an infrared speed measuring probe 45, the infrared speed measuring probe 45 is installed on the inner surface of the centrifugal cylinder 33 and used for detecting the rotation speed of the rotating shaft 32, the infrared speed measuring probe 45 is in communication connection with the control device 43, and the control device 43 controls the power supply 44 to input current to the brake magnet 41 and/or the rotating magnet 42 based on the rotation speed change detected by the infrared speed measuring probe 45.

Further, the mounting seat 34 includes a core shaft 341, a limiting block 342, and a positioning base 343, the lower end of the core shaft 341 penetrates through the limiting block 342 and is fixedly connected with the top surface of the positioning base 343, the bottom surface of the positioning base 343 is fixedly connected with the top surface of the rotating shaft 32, and the test tube rack 5 is detachably mounted on the core shaft 341.

Further, the test tube rack 5 includes a fixing platform 51, a spring clamp 52, a test tube hanger 53, and a test tube fixture block 54, a through hole 511 for the upper end of the mandrel 341 to pass through is formed in the center of the fixing platform 51, the spring clamp 52 is fixedly connected to the center of the top surface of the fixing platform 51 for clamping the upper end of the mandrel 341, 2 symmetrical triangular holes 512 are formed in the fixing platform 51, and the 2 triangular holes 512 are located on two sides of the spring clamp 52 for the electric clamping jaw to grab the fixing platform 51; the test tube hangers 53 are circumferentially and uniformly arranged on the outer surface of the fixed platform 51 around the central axis of the fixed platform 51 and are fixedly connected with the fixed platform 51; every test tube hanger 53 inner wall rotates and is connected with 1 test tube fixture block 54 and is used for blocking the test tube.

Further, the spring clamp 52 comprises a fixing member 521 and 2 clamping members 522, wherein the 2 clamping members 522 are oppositely arranged, one end of each clamping member 522 is fixedly connected with the fixing member 521 through a spring, the other end of each clamping member 522 is provided with an arc concave surface, the fixing member 521 is fixed on the top surface of the fixing platform 51 through a screw, and a ring-shaped clamping groove 3411 is arranged at the clamping position of the core shaft 341 and the clamping member 522.

Example 1

Based on the above structural basis, as shown in fig. 1, 2, 3 and 4.

A centrifuge for albumen separation, structural design is reasonable, cooperatees with arrestment mechanism 4 through actuating mechanism 3, can realize centrifuge's quick start and quick braking to there are time lag and wearing and tearing problem in having reduced the braking, 2 tops of casing are provided with cover 21 that can overturn, 5 detachable installations on pivot 32 tops of test-tube rack, the operation is put into, is taken out to the convenience to test-tube rack 4.

The driving and braking principles of the centrifuge for protein separation are as follows: the driving motor 311 is started, the rotating shaft 32 is driven to rotate through the transmission of the main driving wheel 312, the auxiliary driving wheel 313 and the chain 314, the rotating shaft 32 drives the mounting seat 34 and the test tube rack 5 on the mounting seat 34 to rotate, and therefore protein separation is carried out on the sample in the test tube on the test tube rack 5; when the protein separation is finished, the driving motor 311 is turned off, and at the same time, the control device 43 (which may be a single chip microcomputer) controls the power supply 44 to input current to the braking magnet 41 disposed on the outer surface of the rotating shaft 32 and/or the rotating magnet 43 disposed on the inner surface of the centrifugal cylinder 33, the braking magnet 41 and/or the rotating magnet 42 generates magnetic force, and because the polarities of the opposite magnetic poles of the braking magnet 41 and the rotating magnet 42 are the same, a tangential component force in the rotating direction of the rotating shaft 32 is generated, and the tangential component force plays a role in preventing the rotating shaft 32 from rotating, thereby achieving the purpose of rapidly braking the rotating shaft 32. Without the braking mechanism 4, when the driving motor 311 is turned off, the driving transmission wheel 312, the driven transmission wheel 313 and the rotating shaft 32 can only brake through friction, and the rotating speed is gradually reduced until the complete stop.

Further, the infrared speed measuring probe 45 is disposed on the inner surface of the centrifugal cylinder 33 for detecting the rotation speed of the rotating shaft 32, when the control device 43 receives the fact that the infrared speed measuring probe 45 detects that the rotation speed of the rotating shaft 32 is continuously reduced or abnormal, the control device 43 immediately controls the power supply 44 to input current to the braking magnet 41 and/or the rotating magnet 42, and the rotating shaft 32 is rapidly braked by the magnetic force between the braking magnet 41 and the rotating magnet 2.

Example 2

Based on the above structural basis of example 1, as shown in fig. 1-5.

A centrifuge for albumen separation, test-tube rack 5 includes fixed platform 51, spring card 52, test tube stores pylon 53, test tube fixture block 54, during the use, hang a plurality of test tube and establish on test tube stores pylon 53 and through test tube fixture block 54 chucking, set up 2 symmetrical triangular holes 523 on the fixed platform 52, thereby the cylindric clamping jaw of electronic clamping jaw (not shown) inserts 2 triangular holes 512 and gathers together and snatch test-tube rack 5, then electronic clamping jaw stretches into in the centrifugation storehouse 22, and it is spacing until stopper 342 to pass the upper end of dabber 341 with fixed platform 51's through-hole 511, then the cylindric clamping jaw of electronic clamping jaw loosens, make spring card 52 block dabber 341 upper end, fixed platform 51 fixes on dabber 341, electronic clamping jaw withdraws from casing 2, close centrifugation storehouse 22, casing 2, can carry out centrifugal operation. After the centrifugal operation, centrifugal chamber 22, casing 2 are opened, and electronic clamping jaw stretches into in centrifugal chamber 22, and the cylindric clamping jaw of electronic clamping jaw is inserted and is closed up behind triangular hole 512, and the extrusion force can make spring card 52 open, thereby can upwards mention test-tube rack 5 with test-tube rack 5 and take out.

Further, the spring clamp 52 comprises a fixing member 521 and 2 clamping members 522, a circular clamping groove is formed in the joint of the mandrel 341 and the clamping members 522, when the through hole 511 of the fixing platform 51 penetrates through the upper end of the mandrel 341, and after the upper end of the mandrel 341 sequentially penetrates through the through hole 511 and the passages between the 2 clamping members 522, the circular clamping groove of the mandrel 341 is clamped by the arc concave surface of the clamping member 522, so that the fixing effect is achieved. Chucking spare 522's one end all passes through spring fixed connection with mounting 521, and after the cylindric clamping jaw of electronic clamping jaw inserted triangle hole 512, the clamping jaw closed, and its extrusion force makes chucking spare 522 open to thereby can upwards mention test-tube rack 5 and take out test-tube rack 5.

Wherein, in embodiment 1, in embodiment 2, sealed pad 222, driving motor 311, main drive wheel 312, from drive wheel 313, chain 314, pivot 32, centrifugal barrel 33, braking magnet 41, rotating magnet 42, controlling means 43, power 44, infrared speed measuring probe 45 etc. adopt among the prior art can, its model, concrete structure, concrete mounted position and connected mode are the model, concrete structure, concrete mounted position and connected mode that technical staff in the field known, its structure and principle all are that this technical staff all can learn through the technical manual or learn through conventional experimental approach, do not influence the utility model discloses a technical scheme's realization.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.

Claims (7)

1. A centrifuge for protein separation is characterized by comprising a frame (1), a shell (2), a driving mechanism (3), a braking mechanism (4) and a test tube rack (5); the machine shell (2) is fixedly arranged on the upper surface of the machine frame (1), a turnover cover (21) is arranged at the top of the machine shell (2), and a centrifugal bin (22) is arranged in the machine shell (2); the driving mechanism (3) comprises a driving assembly (31), a rotating shaft (32) and a centrifugal cylinder (33), the driving assembly (31) is fixedly arranged on the rack (1), the driving assembly (31) is connected with the lower end of the rotating shaft (32), the upper end of the rotating shaft (32) sequentially penetrates through the rack (1) and the shell (2) from bottom to top and extends into the centrifugal bin (22), the centrifugal cylinder (33) is sleeved outside the rotating shaft (32), and the rotating shaft (32) and the centrifugal cylinder (33) are coaxially arranged; the braking mechanism (4) comprises braking magnets (41), rotating magnets (42) and a control device (43), wherein the braking magnets (41) are circumferentially and uniformly arranged on the inner surface of the centrifugal cylinder (33) around the central axis of the rotating shaft (32), the rotating magnets (42) are circumferentially and uniformly arranged on the outer surface of the rotating shaft (32) around the central axis of the rotating shaft (32), the installation height of the braking magnet (41) is the same as that of the rotating magnet (42), and the braking magnet (41) and the rotating magnet (42) have the same polarity of opposite poles, the control device (43) is used for controlling the power supply (44) to input current to the brake magnet (41) and/or the rotating magnet (42), so that the rotation shaft (32) stops rotating with respect to the centrifugal cylinder (33) by a magnetic force generated between the braking magnet (41) and the rotating magnet (42); the upper end of pivot (32) is fixed and is provided with mount pad (34), test-tube rack (5) are detachable installs on mount pad (34).

2. The centrifuge for protein separation according to claim 1, wherein the driving assembly (31) comprises a driving motor (311), a main driving wheel (312) and a secondary driving wheel (313), the driving motor (311) is fixedly arranged on the frame (1), an output shaft of the driving motor (311) is in transmission connection with the main driving wheel (312), the main driving wheel (312) is in transmission connection with the secondary driving wheel (313) through a chain (314), and the lower end of the rotating shaft (32) is in transmission connection with the secondary driving wheel (313).

3. The centrifuge for protein separation according to claim 1, wherein the bottom of the centrifugal bin (22) is fixedly connected with the inner bottom surface of the casing (2), the top of the centrifugal bin (22) is provided with an opening and a sealing cover (221) matched with the opening, and a sealing gasket (222) is arranged at the position where the sealing cover (221) is contacted with the opening.

4. The centrifuge for protein separation according to claim 1, wherein the brake mechanism (4) further comprises an infrared tachometer probe (45), the infrared tachometer probe (45) is mounted on the inner surface of the centrifuge cylinder (33) for detecting the rotation speed of the rotating shaft (32), the infrared tachometer probe (45) is in communication connection with a control device (43), and the control device (43) controls the power supply (44) to input current to the brake magnet (41) and/or the rotating magnet (42) based on the rotation speed change detected by the infrared tachometer probe (45).

5. The centrifuge for protein separation according to claim 1, wherein the mounting seat (34) comprises a mandrel (341), a limiting block (342) and a positioning base (343), the lower end of the mandrel (341) penetrates through the limiting block (342) to be fixedly connected with the top surface of the positioning base (343), the bottom surface of the positioning base (343) is fixedly connected with the top surface of the rotating shaft (32), and the test tube rack (5) is detachably mounted on the mandrel (341).

6. The centrifuge for protein separation according to claim 5, wherein the test tube rack (5) comprises a fixing platform (51), a spring clamp (52), a test tube rack (53) and a test tube fixture block (54), a through hole (511) for the upper end of the mandrel (341) to pass through is formed in the center of the fixing platform (51), the spring clamp (52) is fixedly connected to the center of the top surface of the fixing platform (51) and used for clamping the upper end of the mandrel (341), 2 symmetrical triangular holes (512) are formed in the fixing platform (51) in the sea, and 2 triangular holes (512) are located on two sides of the spring clamp (52) and used for electric clamping jaws to grab the fixing platform (51); the test tube hangers (53) are circumferentially and uniformly arranged on the outer surface of the fixed platform (51) around the central axis of the fixed platform (51) and are fixedly connected with the fixed platform (51); every test tube stores pylon (53) inner wall rotates and is connected with 1 test tube fixture block (54) and is used for blocking the test tube.

7. The centrifuge for protein separation according to claim 6, wherein the spring clip (52) comprises a fixing member (521) and 2 clamping members (522), wherein the 2 clamping members (522) are oppositely arranged, one end of each clamping member (522) is fixedly connected with the fixing member (521) through a spring, the other end of each clamping member (522) is provided with a circular arc concave surface, the fixing member (521) is fixed on the top surface of the fixing platform (51) through a screw, and a ring-shaped clamping groove (3411) is arranged at the clamping position of the core shaft (341) and the clamping member (522).

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