CN112170023A

CN112170023A - Centrifugal machine

Info

Publication number: CN112170023A
Application number: CN202010987689.7A
Authority: CN
Inventors: 杜春兰; 杨国骏; 刘萍; 张立群
Original assignee: Second Affiliated Hospital Army Medical University
Current assignee: Second Affiliated Hospital Army Medical University
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-01-05
Anticipated expiration: 2040-09-18
Also published as: CN112170023B

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a centrifugal machine.A centrifugal mechanism comprises a placing rack and a rotary table, wherein test tube holes for placing test tubes are formed in the placing rack, the placing rack is connected to the rotary table, clamping groups are arranged in the placing rack, each clamping group comprises clamping blocks symmetrically arranged along the test tube holes, and the clamping blocks are connected to the placing rack in a sliding manner; the test tube opening device comprises a clamping block, a clamping block and a cover opening disc, and is characterized by further comprising a cover opening mechanism and a negative pressure mechanism, wherein the cover opening mechanism comprises a lifter and a cover opening disc, the lifter drives the cover opening disc to lift, a guide rod is fixedly connected to the cover opening disc, the cover opening disc is also connected with a cover opener, the guide rod can push the clamping block to move so as to clamp a test tube tightly, and the cover opener is used for opening a test tube cover; the negative pressure mechanism generates negative pressure after the test tube is uncapped to draw away the aerosol. This scheme is used for solving among the prior art the aerosol that exists after uncapping to the sample in the test tube and brings the problem of harm and the sample centrifugation in the test tube problem of troublesome poeration that exists of uncapping after removing again.

Description

Centrifugal machine

Technical Field

The invention relates to the technical field of medical instruments, in particular to a centrifugal machine.

Background

In the existing medical clinical examination, the separation of a specimen almost completely adopts centrifugal precipitation separation, particles with small density are centrifuged even by a high-speed centrifuge, the centrifugation time is about 15 minutes to 30 minutes, a large amount of aerosols such as bioactive particles or viruses contained in the specimen are separated from the specimen into a suspension state under the centrifugal rotation, when the specimen is uncapped (the specimen is generally packed by a test tube for centrifugation), the suspended bioactive particles or viruses can quickly float into the air, the great pollution is caused to workers and the environment, particularly, the extremely small toxic or bioactive particles (below pm 2.5) directly enter respiratory tracts to cause respiratory tract infection, and even enter blood to cause toxemia or cell canceration; in addition, after the test tube is uncapped, the specimen in the uncapped test tube is also polluted by aerosol scattered in the test tube which is uncapped (namely, cross contamination), so that the problem of inaccurate specimen test in the test tube is caused.

In order to avoid the influence of the test tube that is uncapping to the sample in the test tube that has uncapped among the prior art, the test tube that often adopts the uncapping machine to have the sample is unified to uncap to there is precedence order in avoiding the test tube to uncap and influence the problem of sample test accuracy, however, centrifuge and uncapping machine branch locate different equipment, before uncapping, need artifically take out the test tube from centrifuge one by one and place uncapping machine again and uncap one by one, lead to the trouble problem of whole process operation.

Disclosure of Invention

The invention aims to provide a centrifuge, which solves the problems that aerosol after a specimen in a test tube is uncapped in the prior art brings harm to medical staff and the operation is troublesome when the specimen in the test tube is moved after centrifugation.

In order to achieve the above object, the basic scheme of the invention is as follows:

a centrifugal machine comprises a shell, a cover body and a centrifugal mechanism located in the shell, wherein the cover body covers the shell, the centrifugal mechanism comprises a placing frame and a rotary table, test tube holes for placing test tubes are formed in the placing frame, the placing frame is connected to the rotary table, clamping groups are arranged in the placing frame, each clamping group comprises clamping blocks symmetrically arranged along the test tube holes, the clamping blocks are connected to the placing frame in a sliding mode, and the clamping groups can clamp the test tubes tightly; the test tube opening device comprises a clamping block, a clamping block and a cover opening disc, and is characterized by further comprising a cover opening mechanism and a negative pressure mechanism, wherein the cover opening mechanism comprises a lifter and a cover opening disc, the lifter drives the cover opening disc to lift, a guide rod is fixedly connected to the cover opening disc, the cover opening disc is also connected with a cover opener, the guide rod can push the clamping block to move so as to clamp a test tube tightly, and the cover opener is used for opening a test tube cover; the negative pressure mechanism is used for generating negative pressure after the test tube is uncapped so as to pump away aerosol generated during uncapping.

Compare the beneficial effect in prior art:

when this scheme of adoption, on centrifuge, both realized the centrifugation to the sample of dress in the test tube, can accomplish the back again in the centrifugation, the guide bar that utilizes the mechanism of uncapping promotes the grip block of centre gripping group in order pressing from both sides tight test tube, and after the test tube presss from both sides tightly, the uncapping ware was extracted the test tube lid, and after the test tube lid was extracted, negative pressure mechanism in time produced the negative pressure, and then in time taken away aerosol. Compared with the prior art, the scheme has the advantages that in the sealed space formed by covering the shell and the cover body, centrifugation is realized, the cover opening of the test tube is realized, the aerosol generated by the cover opening is sucked away in time, and the condition that the medical staff is damaged due to the fact that the aerosol is absorbed by the medical staff when the cover is opened in the prior art is avoided; meanwhile, the problem that the subsequent test accuracy of the samples in the test tube which are successively uncovered is influenced because the aerosol is not pumped away in time is avoided; in addition, the action of centrifuging and uncovering by replacing equipment by medical staff is omitted, the centrifugation and the uncovering are finished at one go, the workload of the medical staff is reduced, and the operation time is shortened.

Further, the guide rod is hollow inside, a plurality of through holes communicated with the hollow inside are formed in the side wall of the guide rod, the negative pressure mechanism comprises a negative pressure machine and a negative pressure pipe, and the negative pressure pipe is communicated with the hollow inside of the guide rod.

Has the advantages that: after the negative pressure machine produced the negative pressure, realized the negative pressure through the guide bar and adsorbed, and on the guide bar can insert the rack, the guide bar was located the test tube next door, so can absorb through the aerosol that produces when the guide bar uncaps the test tube fast.

Further, the test tube hole array of rack is arranged, and every row of test tube hole all corresponds a centre gripping group, forms the adjustment hole between the adjacent grip block on the adjacent centre gripping group, and the adjustment hole lower part is circularly, and adjustment hole upper portion is the toper, and the guide bar can insert in the adjustment hole.

Has the advantages that: through set up the adjustment hole on adjacent centre gripping group for when the guide bar was not aligned with the lower part of adjustment hole is circular, supported the toper on pressing the adjustment hole upper portion through the guide bar, force the rack to rotate along with the carousel, guarantee that the guide bar after the rotation can accurately insert in the lower part of adjustment hole is circular, form the automatic adjustment when uncapping mechanism and centrifugal mechanism position do not correspond, guarantee going on smoothly of uncapping the test tube.

Further, the cap opener comprises a cap opening sleeve and a clamping jaw, the cap opening sleeve is fixedly connected to the cap opening disc, the test tube cap can be contained in the cap opening sleeve, the clamping jaw is fixedly connected to the bottom of the cap opening sleeve, and when the cap opener moves, the clamping jaw extracts the test tube cap.

Has the advantages that: the test tube cover is pulled out through the moving clamping jaws, the structure is simple, and the test tube cover is easy to realize.

Further, be equipped with the baffle on the lid, form the guiding groove between baffle and the lid, the guiding groove is located the lid and uncaps between the dish, is equipped with the collecting vessel in the casing, and the one end of guiding groove is located the collecting vessel top, and the cover sleeve pipe is kept away from the one end of jack catch and is just to the lid, and the test tube lid can follow the cover sleeve pipe that uncaps and fall to the guiding groove in.

Has the advantages that: after accomplishing uncapping of test tube, medical personnel rotate the lid when opening centrifuge's lid and exceed 90 for the test tube lid falls to the guiding groove in uncapping the cover sleeve pipe, again along guiding groove whereabouts to the collecting vessel in, accomplishes the collection of test tube lid, further simplifies medical personnel's operating procedure, reduces medical personnel's working strength.

Furthermore, the centrifugal mechanism comprises a first driver for driving the rotary table to rotate, the first driver is fixedly connected to the shell, and the rotary table is provided with a rotating shaft fixedly connected with the driver; still be equipped with retaining mechanism in the casing, retaining mechanism includes second driver, top dish and pressure disk, and the rack rotates to be connected on the carousel, and the vertical sliding connection of top dish is in the pivot, pressure disk and top dish fixed connection, and the second driver is used for driving the top dish and supports tight rack to the higher level, and the pressure disk is located the upper and lower both ends of rack with the top dish, and the pressure disk can press the rack to the slope.

Has the advantages that: the holding mechanism is arranged, so that the placing frame is in an inclined state through the pressure plate when the specimen in the test tube is centrifuged, and the centrifugation effect of the specimen in the test tube is ensured; and when uncapping, utilize holding mechanism equally, utilize the second driver to drive a set rebound, the set rebound in-process of top, the pressure disk loosens the pressing of rack, and the rack will tend to the level gradually under the effect of a set gradually, supports the rack level tightly until a set, and the uncapping device of being convenient for opens the test tube lid behind vertical removal.

Further, the rack is provided with a guide groove, and the pressure plate is provided with a guide rib capable of being clamped into the guide groove.

Has the advantages that: the cooperation of guide way and direction muscle can not produce the relative movement of circumference with the pressure disk when guaranteeing the rack rotation, and then guarantees the rack uniformity of inclination when rotating.

Furthermore, the bottom of the shell is provided with a fresh air inlet, the fresh air inlet is provided with a one-way valve, and the one-way valve is used for allowing outside air to enter the shell.

Has the advantages that: after the negative pressure mechanism is started, the shell is in a negative pressure state, fresh air enters the shell from the one-way valve of the fresh air inlet, the internal environment of the shell after the cover is opened is ensured to be in a normal pressure state, and the freshness of the air in the shell is ensured.

Further, a disinfection tube is arranged between the negative pressure machine and the negative pressure tube, and a photocatalyst filter screen and an ultraviolet disinfection lamp are arranged in the disinfection tube.

Has the advantages that: after the negative pressure mechanism draws the aerosol away from the shell through the negative pressure pipe, the aerosol firstly enters the disinfection pipe, and the disinfection and sterilization of the aerosol are realized by the photocatalyst filter screen and the ultraviolet disinfection lamp in the disinfection pipe, so that the cleanness of gas exhausted by the negative pressure mechanism is ensured.

Furthermore, the photocatalyst filter screen is V-shaped.

Has the advantages that: the V-shaped photocatalyst filter screen can relatively increase the contact area with harmful substances on the aerosol, and further improves the effect of killing the harmful substances on the aerosol.

Drawings

FIG. 1 is a front cross-sectional view of a first embodiment of the present invention;

FIG. 2 is a front sectional view of a connection relationship between a lid and a housing when the lid is opened according to a first embodiment of the present invention;

FIG. 3 is a top view of the centrifugal structure, the collection bucket, the negative pressure machine and the one-way valve in the housing according to the embodiment of the present invention;

FIG. 4 is an isometric view of a centrifuge mechanism and a lid release mechanism (with the elevator and negative pressure tube removed) according to an embodiment of the invention;

FIG. 5 is a front cross-sectional view of FIG. 4;

3 FIG. 3 6 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 5 3; 3

FIG. 7 is an enlarged view of portion B of FIG. 5;

FIG. 8 is an isometric view of FIG. 4 with the lid release mechanism removed;

FIG. 9 is an isometric view of a clamping group with test tubes and guide rods according to a first embodiment of the present invention;

fig. 10 is a schematic connection diagram of the negative pressure mechanism according to the second embodiment of the invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a shell 1, a cover body 2, a centrifugal mechanism 3, a first driver 31, a placing frame 32, a guide groove 321, a rotary table 33, a rotary shaft 331, a test tube 4, a test tube cover 41, a second driver 51, a top disc 52, a pressure disc 53, a guide rib 531, a clamping group 6, a clamping block 61, an adjusting hole 62, a lifter 71, a cover opening disc 72, a guide rod 73, a cover opening device 74, a cover opening sleeve 741, a clamping jaw 742, a guide plate 8, a guide groove 81, a negative pressure machine 91, a negative pressure pipe 92, a collecting barrel 10, a one-way valve 20, a disinfection pipe 30, a photocatalyst filter screen 40 and an ultraviolet disinfection lamp 50.

Example one

An embodiment substantially as shown in figures 1 to 9 of the accompanying drawings:

referring to fig. 1 to 4, a centrifuge includes a housing 1, a cover 2, a centrifugal mechanism 3 located in the housing 1, a holding mechanism, a cover opening mechanism, and a negative pressure mechanism 91, where the cover 2 covers the housing 1 to form a closed space, the cover 2 is rotatably connected to the housing 1, the cover 2 covers the housing 1, the centrifugal mechanism 3 includes a first driver 31, a rack 32, and a turntable 33, the first driver 31 is fixedly connected to the bottom of the housing 1, the first driver 31 employs a servo motor, a vertical rotating shaft 331 is integrally formed at the bottom of the turntable 33, the rotating shaft 331 is fixedly connected to the first driver 31, the first driver 31 drives the turntable 33 to rotate, the rack 32 is rotatably connected to the turntable 33, the rack 32 is uniformly distributed in the circumferential direction of the turntable 33, in this embodiment, the number of the rack 32 is four, each rack 32 is provided with a test tube 4 hole for placing a test tube 4, the test tubes are distributed in a 4-well array.

The holding mechanism comprises a second driver 51, a top disc 52 and pressure discs 53, the number of the pressure discs 53 is the same as that of the placing frame 32, the top disc 52 is vertically and slidably connected onto the rotating shaft 331, the pressure discs 53 are fixedly connected with the top disc 52, the second driver 51 is fixedly connected to the bottom of the shell 1, and the second driver 51 adopts an electric push rod. The output shaft of the second driver 51 is slidably connected to the bottom of the pressure plate 53, the bottom of the pressure plate 53 is provided with an annular groove, and the output shaft of the second driver 51 is slidably connected in the annular groove so as to ensure that the second driver 51 is always connected with the top disc 52 without influencing the rotation of the top disc 52 along with the rotating disc 33; the second driver 51 can drive the top disc 52 to horizontally abut against the placing frame 32 upwards, the pressure disc 53 and the top disc 52 are located at the upper end and the lower end of the placing frame 32, and the pressure disc 53 can press the placing frame 32 to incline.

Referring to fig. 8 and 9, each of the holders 32 is formed with a guide groove 321, and each of the platens 53 is integrally formed with a guide rib 531 capable of being engaged with the guide groove 321.

Equal sliding connection has centre gripping group 6 in every rack 32, every centre gripping group 6 all includes along the 4 pore pair of test tube grip block 61 that sets up, grip block 61 sliding connection is on rack 32, grip group 6 can press from both sides tight (all processing has the curved surface that pastes with test tube 4 on every grip block 61) with test tube 4, it has the block rubber to paste on this curved surface, two grip blocks 61 on same centre gripping group 6 are close to test tube 4 when, thereby can hold test tube 4 tightly and realize the clamp of test tube 4), form adjustment hole 62 between the adjacent grip block 61 on the adjacent centre gripping group 6, adjustment hole 62 lower part is circularly, adjustment hole 62 upper portion is the toper.

With reference to fig. 4 to 7, the cap opening mechanism includes a lifter 71 and a cap opening tray 72, the lifter 71 is fixedly connected to the lower surface of the cap body 2, the lifter 71 drives the cap opening tray 72 to move up and down, a guide rod 73 and a cap opener 74 are fixedly connected to the cap opening tray 72, the guide rod 73 can penetrate through the placing frame 32 and be inserted into the adjusting hole 62 formed between the adjacent clamping blocks 61, the guide rod 73 can squeeze the adjacent two clamping blocks 61 apart when being inserted into the adjusting hole 62, and then the clamping group 6 formed by the clamping blocks 61 clamps the test tube 4 tightly.

The guide rod 73 is hollow, and a plurality of through holes communicated with the hollow inside are formed in the side wall of the guide rod 73.

The cover opener 74 comprises a cover opening sleeve 741 and a clamping claw 742, the cover opening sleeve 741 is fixedly connected to the cover opening disc 72, the test tube cover 41 can be contained in the cover opening sleeve 741, the clamping claw 742 is fixedly connected to the bottom of the cover opening sleeve 741, and when the cover opener 74 moves upwards under the driving of the lifter 71, the clamping claw 742 pulls out the test tube cover 41.

An inclined guide plate 8 is fixed on the cover body 2 through screws, an inclined guide groove 81 is formed between the guide plate 8 and the cover body 2, the guide groove 81 is positioned between the cover body 2 and the cover opening disc 72, and a collecting barrel 10 is installed in the shell 1; after the cover body 2 is opened, the lower end of the guide groove 81 is located right above the collecting barrel 10, the end of the cover-opening sleeve 741 away from the claw 742 is opposite to the cover body 2, the test tube cover 41 can fall into the guide groove 81 from the interior of the cover-opening sleeve 741, and finally the test tube cover 41 falls into the collecting barrel 10 along the guide groove 81.

Negative pressure machine 91 constructs including negative pressure machine 91 and negative pressure pipe 92, and negative pressure pipe 92 communicates with the inside hollow structure of guide bar 73, and negative pressure machine 91 constructs and is used for producing the negative pressure and then takes away the aerosol that produces when uncapping after test tube 4 uncaps.

The bottom of the shell 1 is provided with a fresh air inlet, a check valve 20 is fixedly arranged at the fresh air inlet, and the check valve 20 is used for allowing outside air to enter the shell 1.

The specific implementation process is as follows:

when adopting this embodiment, when medical personnel centrifuged the test tube 4 that has the sample, opened lid 2, put into the test tube 4 hole of rack 32 with test tube 4 that has test tube lid 41 on, the second driver 51 of holding mechanism drives top plate 52 downstream after that, and pressure disk 53 follows top plate 52 downstream back, presses rack 32 to the slope until pressure disk 53 and stops with second driver 51 after making things convenient for test tube 4 to centrifuge. Then, the first driver 31 of the centrifugal mechanism 3 is started, the turntable 33 drives the placing frame 32, the top plate 52 and the pressure plate 53 to synchronously rotate, and the sample in the test tube 4 is centrifuged; after the centrifugation is finished, the first driver 31 is stopped, the lifter 71 is started to drive the uncapping disc 72 to move downwards, the guide rod 73 penetrates through the placing frame 32 and is inserted into the adjusting hole 62 formed between the adjacent clamping blocks 61 on the adjacent clamping groups 6, and on one hand, the test tube 4 on the placing frame 32 is ensured to be aligned with the uncapping device 74 on the uncapping disc 72; on the other hand, the grip block 61 is pressed by the guide rod 73, so that the two grip blocks 61 on the grip group grip the test tube 4.

In the process that the uncovering disc 72 moves downwards, the claws 742 at the bottom of the uncovering sleeve 741 are firstly pressed by the test tube cover 41 to be opened, and when the test tube cover 41 extends into the uncovering sleeve 741, the claws 742 approach the test tube cover 41 to hook the test tube cover 41; then, the lifter 71 drives the cap opening disc 72 to move upwards, and the test tube 4 is clamped by the clamping group 6, so that the cap opener 74 can pull down the test tube cap 41 after moving upwards, and the cap opening action of the test tube 4 is completed.

In the process of uncapping, negative pressure machine 91 that negative pressure machine 91 constructs starts, and the negative pressure of production passes through negative pressure pipe 92 and enters into guide bar 73 in, and the aerosol that produces when rethread guide bar 73's through-hole in time uncapping test tube 4 is in time taken away.

With reference to fig. 2, after the above work is completed, when the medical staff opens the cover body 2, the cover body 2 rotates, the test tube cover 41 originally located in the cover opening sleeve 741 falls onto the cover body 2 under the action of gravity, and falls into the guide groove 81 formed by the guide plate 8 along the inclined cover body 2, and finally falls into the collection barrel 10 through the guide groove 81, so that the automatic collection of the test tube cover 41 is realized on the premise that unnecessary actions are not required to be added.

The embodiment realizes centrifugation, uncovering of the test tube 4 and timely pumping away of aerosol generated by uncovering, and avoids the situation that medical staff are harmed due to the fact that the aerosol is absorbed by the medical staff when the cover is uncovered; meanwhile, the problem that the accuracy of subsequent tests of the samples in the test tubes 4 which are successively uncovered is influenced because the aerosol is not pumped away in time is also solved; in addition, the action of centrifuging and uncovering by replacing equipment by medical staff is omitted, the centrifugation and the uncovering are finished at one go, the workload of the medical staff is reduced, and the operation time is shortened.

Example two

The second embodiment is basically as shown in fig. 10, and the second embodiment is modified on the basis of the first embodiment as follows: a disinfection tube 30 is fixedly connected between the negative pressure machine 91 and the negative pressure tube 92, a photocatalyst filter screen 40 and an ultraviolet disinfection lamp 50 are installed in the disinfection tube 30, and the photocatalyst filter screen 40 is V-shaped.

The specific implementation process is as follows:

after the negative pressure machine 91 draws the aerosol out of the shell 1 through the negative pressure pipe 92, the aerosol firstly enters the disinfection pipe 30, and the disinfection and sterilization of the aerosol are realized by the photocatalyst filter screen 40 and the ultraviolet disinfection lamp in the disinfection pipe 30, so that the cleanness of the gas exhausted from the negative pressure machine 91 is ensured.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a centrifuge, includes casing, lid and the centrifugal mechanism that is located the casing, and the lid covers the casing, and centrifugal mechanism includes rack and carousel that can rotate, is equipped with the test tube hole that is used for placing the test tube on the rack, and its characterized in that is connected on the carousel to the rack: clamping groups are arranged in the placing frame, each clamping group comprises clamping blocks symmetrically arranged along the test tube hole, the clamping blocks are connected to the placing frame in a sliding mode, and the clamping groups can clamp the test tube tightly; the test tube opening device comprises a clamping block, a clamping block and a cover opening disc, and is characterized by further comprising a cover opening mechanism and a negative pressure mechanism, wherein the cover opening mechanism comprises a lifter and a cover opening disc, the lifter drives the cover opening disc to lift, a guide rod is fixedly connected to the cover opening disc, the cover opening disc is also connected with a cover opener, the guide rod can push the clamping block to move so as to clamp a test tube tightly, and the cover opener is used for opening a test tube cover; the negative pressure mechanism is used for generating negative pressure after the test tube is uncapped so as to pump away aerosol generated during uncapping.

2. The centrifuge of claim 1, wherein: the guide rod is hollow inside, a plurality of through holes communicated with the hollow inside are formed in the side wall of the guide rod, the negative pressure mechanism comprises a negative pressure machine and a negative pressure pipe, and the negative pressure pipe is communicated with the hollow inside structure of the guide rod.

3. The centrifuge of claim 1, wherein: the test tube hole array of rack arranges, and every row of test tube hole all corresponds a centre gripping group, forms the adjustment hole between the adjacent grip block on the adjacent centre gripping group, and the adjustment hole lower part is circularly, and adjustment hole upper portion is the toper, and the guide bar can insert in the adjustment hole.

4. The centrifuge of claim 1, wherein: the cover opener comprises a cover opening sleeve and a clamping jaw, the cover opening sleeve is fixedly connected to a cover opening disc, a test tube cover can be accommodated in the cover opening sleeve, the clamping jaw is fixedly connected to the bottom of the cover opening sleeve, and when the cover opener moves, the clamping jaw extracts the test tube cover.

5. The centrifuge of claim 4, wherein: be equipped with the baffle on the lid, form the guiding groove between baffle and the lid, the guiding groove is located between lid and the dish that uncaps, is equipped with the collecting vessel in the casing, and the one end of guiding groove is located the collecting vessel top, and the cover sleeve pipe is kept away from the one end of jack catch and is just to the lid, and the test tube lid can follow the cover sleeve pipe that uncaps and fall to the guiding groove in.

6. The centrifuge of claim 1, wherein: the centrifugal mechanism comprises a first driver for driving the rotary table to rotate, the first driver is fixedly connected to the shell, and the rotary table is provided with a rotating shaft fixedly connected with the driver; still be equipped with retaining mechanism in the casing, retaining mechanism includes second driver, top dish and pressure disk, and the rack rotates to be connected on the carousel, and the vertical sliding connection of top dish is in the pivot, pressure disk and top dish fixed connection, and the second driver is used for driving the top dish and supports tight rack to the higher level, and the pressure disk is located the upper and lower both ends of rack with the top dish, and the pressure disk can press the rack to the slope.

7. The centrifuge of claim 6, wherein: be equipped with the guide way on the rack, be equipped with the direction muscle that can block into the guide way on the pressure disk.

8. The centrifuge of claim 1, wherein: the bottom of the shell is provided with a fresh air inlet, the fresh air inlet is provided with a one-way valve, and the one-way valve is used for allowing outside air to enter the shell.

9. The centrifuge of claim 2, wherein: the negative pressure mechanism, still be equipped with the disinfection pipe between negative pressure machine and the negative pressure pipe, be equipped with photocatalyst filter screen and ultraviolet ray disinfection lamp in the disinfection pipe.

10. The centrifuge of claim 9, wherein: the photocatalyst filter screen is V-shaped.