Centrifugal tube rack

Abstract

The utility model discloses a centrifuge tube shelf, which relates to the technical field of laboratory auxiliary equipment and comprises a shell support, the shell support is provided with an inner cavity for placing a centrifuge tube, the inner cavity is provided with at least one supporting plate, and the supporting plate is fixed with the shell support to support the centrifuge tube to keep upright. The shell bracket is provided with a storage box for storing a centrifugal tube cover, and the storage box comprises a combined shell and a temporary storage assembly arranged in the combined shell; a through hole corresponding to the centrifugal tube in position is formed in the combined shell; the temporary retention assembly comprises a correction plate and blocking plates movably arranged on the two sides of the correction plate. According to the utility model, the centrifugal tube cover is stored above the position corresponding to the position of the centrifugal tube, and falls onto the corresponding centrifugal tube under the action of gravity during release, so that the centrifugal tube and the centrifugal tube cover are prevented from being manually and repeatedly paired in a chemical experiment; and meanwhile, the centrifugal tube can be quickly fixed, the centrifugal tube and the centrifugal tube cover are combined by an auxiliary pressing tool, and the artificial fatigue is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of laboratory auxiliary equipment, and particularly relates to a centrifugal tube rack. BACKGROUND

[0002] In chemical analysis experiments, sample pretreatment is a key link to determine the accuracy of test results. For example, biological sample or environmental sample detection often needs to go through acidolysis, extraction, centrifugation, filtration and other multi-step processing. In the operation, different reagents such as buffer solution, enzyme preparation and precipitating agent need to be added to the centrifugal tube in 5-8 times. When facing a large number of samples, the experimenters must use oily marker pens to make double marks on each tube body and corresponding tube cover. The forced requirement of "tube-cover pairing" significantly increases the preparation time. In actual operation, the experiment table is often piled with open tube covers, which not only has the risk of confusion caused by accidental falling, but also occupies the space for pipetting operation. Moreover, when the sample and the conventional sample are cross-contaminated due to the unclear tube cover number, it will cause serious experimental accidents, highlighting the vulnerability of the traditional numbering method. In addition, when multiple reagent adding steps need to be processed continuously, the experimenters need to repeatedly separate and combine a large number of centrifugal tubes and centrifugal tube covers one by one, which will cause wrist fatigue and pain. This operation mode with high repeatability and high precision requirement has become an important bottleneck restricting the improvement of detection throughput and laboratory biological safety. CONTENT

[0003] The utility model aims at providing a centrifugal tube rack, which solves the problem of repeated pairing between the centrifugal tube and the tube cover in the prior art, and the pairing error in searching for the tube cover and the centrifugal tube.

[0004] The utility model solves the above technical problem through the following technical scheme. The utility model discloses a shell support, the shell support has an inner cavity for placing a centrifugal tube, at least one supporting plate is arranged on the inner cavity, the supporting plate is fixed with the shell support to support the centrifugal tube to keep vertical, a storage box is arranged on the shell support to store a centrifugal tube cover, the storage box comprises a combined shell and a temporary retention assembly arranged in the combined shell.

[0005] A through hole corresponding to the position of the centrifugal tube is arranged on the combined shell.

[0006] The temporary retention assembly comprises a correction plate and a blocking plate movably arranged on the two sides of the correction plate, a through slot is arranged on the correction plate to pass the centrifugal tube cover through the through hole, a through hole with the same size as the through slot is arranged on the blocking plate, the through hole and the through slot are coaxial when the blocking plate moves, the through hole and the through slot form a storage position to store the centrifugal tube cover, the through hole and the through slot are coaxial when the blocking plate moves, and the through hole and the through slot form a dropping position to make the centrifugal tube cover fall on the centrifugal tube under gravity.

[0007] Preferably, the two ends of the blocking plate are respectively provided with a pulling structure and an elastic expansion piece, the free end of the elastic expansion piece is fixed to the inner wall of the combined shell, and the free end of the pulling structure extends to the outside through the combined shell.

[0008] Preferably, when the two blocking plates move relative to the combined shell, the moving directions of the two blocking plates are the same or opposite.

[0009] Preferably, the pulling structure comprises a fixed sheet fixed to the blocking plate, a round shaft is rotatably connected to the fixed sheet, and a blocking piece is fixed to the free end of the round shaft.

[0010] Preferably, the combined shell is provided with a movable window for the blocking piece to enter or exit.

[0011] Preferably, two opposite side walls of the shell support are provided with operation openings for taking and placing the storage box.

[0012] Preferably, the blocking piece comprises a clamping block fixed to the round shaft, a sliding strip is movably connected to the clamping block, a pulling shell is fixed to the sliding strip through a connecting rod, and a rubber shell is fixed to the inner wall of the pulling shell.

[0013] Preferably, the rubber shell is matched with the inner wall of the pulling shell, and anti-skid lines are additionally arranged on the inner wall of the rubber shell.

[0014] Preferably, the supporting plate comprises a centrifugal tube supporting plate, the centrifugal tube supporting plate is provided with at least one centrifugal tube supporting hole, and the position of the centrifugal tube supporting hole corresponds to the through hole.

[0015] Preferably, the inner bottom of the shell support is provided with a fixer for fixing the centrifugal tube.

[0016] The fixer comprises a positioning plate arranged at the inner bottom of the shell support, the upper side of the positioning plate is provided with at least one clamping holder, the position of the clamping holder corresponds to the centrifugal tube supporting hole, the upper side of the clamping holder is provided with a pressing plate, at least one hoop hole is arranged in the pressing plate, and the pressing plate is sleeved on the clamping holder through the hoop hole.

[0017] The clamping holder comprises a round plate fixed to the positioning plate, a plurality of circumferentially arranged upright elastic pieces are arranged on the round plate, the middle part of the upright elastic piece is provided with a protrusion in the radial direction of the positioning plate, when the pressing plate slides relative to the clamping holder to the protrusion, the clamping holder abuts against the centrifugal tube fixed on the round plate.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. By setting the blocking plate and the correction plate, the centrifuge tube cover can be stored in the combined shell or put out of the combined shell; the centrifuge tube position is one-to-one corresponding to the outer shell support and the supporting plate, which not only can store the centrifuge tube, but also can set the centrifuge tube and the centrifuge tube cover correspondingly, so that the "tube-cover pairing" of batch reagent adding in the experiment can be realized without manual operation, the repeated mechanical operation is reduced, and the personnel fatigue is reduced; the manual pairing error is eliminated, and the cross contamination risk is reduced.

[0020] 2. By additionally setting the fixing sheet, the circular shaft and the blocking piece, the position of storing and putting the centrifuge tube cover can be further determined, and the state is maintained, so that the manual putting of the centrifuge tube cover is facilitated, and the accuracy of the position is ensured when falling by gravity.

[0021] 3. The fixer arranged in the outer shell support can facilitate batch fixing of the centrifuge tube, and the cooperation of the clamping block, the sliding strip, the connecting rod, the shell pulling device, the rubber shell and other components can realize one-time pressing cooperation of the centrifuge tube and the centrifuge tube cover by using a tool, and the manual fatigue is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a sectional view of the internal structure schematic diagram;

[0024] Figure 3 It is Figure 1 It is a structural schematic diagram of the storage box in the utility model;

[0025] Figure 4 It is Figure 3 It is an enlarged structural schematic diagram of A in the utility model;

[0026] Figure 5 It is Figure 1 It is a structural schematic diagram of the fixer in the utility model;

[0027] Figure 6 It is Figure 5 It is an enlarged structural schematic diagram of B in the utility model;

[0028] Figure 7 It is Figure 1 It is a structural schematic diagram of the outer shell support in the utility model;

[0029] Figure 8 It is Figure 7 It is a structural explosion schematic diagram of the utility model;

[0030] Figure 9 It is Figure 8 It is an enlarged structural schematic diagram of C in the utility model.

[0031] The numbers in the drawing represent:

[0032] 1. Outer casing support; 11. Horizontal plate; 12. Vertical plate; 13. Bottom plate;

[0033] 2. Support plate; 21. Centrifuge tube support plate; 22. Centrifuge tube support hole;

[0034] 3. Storage box;

[0035] 31. Composite shell; 311. Rectangular frame; 312. Top plate; 313. Bottom plate;

[0036] 32. Shaft retainer; 33. Baffle plate;

[0037] 34. Tensioning structure; 341. Fixing plate; 342. Round shaft; 343. Locking block; 344. Sliding bar; 345. Connecting rod; 346. Pull-out shell; 347. Rubber shell; 35. Elastic telescopic component; 36. Correction plate;

[0038] 4. Fixing device; 41. Positioning plate; 42. Clip; 421. Round plate; 422. Upright spring; 43. Pressure plate; 44. Hoop hole; 45. Restoring spring. Detailed Implementation

[0039] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0040] Example 1

[0041] This embodiment provides a technical solution: a centrifuge tube rack, such as... Figures 1-9 As shown, the device includes an outer shell support 1, which has an inner cavity for holding centrifuge tubes. The inner cavity is provided with at least one support plate 2, which is fixed to the outer shell support 1 to support the centrifuge tubes and keep them upright. In this embodiment, the number of support plates 2 is set to two. The two support plates 2 can better restrict the centrifuge tubes to keep them upright, so as to facilitate the addition of reagents into the centrifuge tubes.

[0042] A storage box 3 is provided on the outer casing support 1 to store centrifuge tube caps. The storage box 3 includes a combined shell 31 and a temporary holding component placed therein.

[0043] The combined shell 31 is provided with through holes corresponding to the position of the centrifuge tube. The number of through holes can be set according to the requirements. In this embodiment, the number of through holes is set to 27. The through holes are used to pass through the centrifuge tube cover, so the diameter of the through holes should be greater than the diameter of the centrifuge tube cover.

[0044] For the convenience of installing the temporary assembly in the combined shell 31, the combined shell 31 comprises a rectangular frame 311 and upper and lower plates 312 and 313 arranged on the upper and lower sides of the rectangular frame 311. The upper plate 312 is arranged on the upper side and has mounting holes formed at the four corners, and bolts are arranged in the mounting holes. The lower plate 313 is arranged on the lower side and has nuts fixed at the four corners, and the upper and lower plates 313 and the rectangular frame 311 are fixed by connecting the nuts and the bolts, facilitating the assembly of the whole. The through holes are arranged on the upper and lower plates 312 and 313. Figure 3 .

[0045] In order to ensure the stability of the installation of the combined shell 31 and the shell support 1, the combined shell 31 formed by the rectangular frame 311, the upper plate 312 and the lower plate 313 is in the form of a regular box, and is adapted to the cross section of the inner cavity of the shell support 1. In order to facilitate the disassembly and assembly of the combined shell 31 and the shell support 1, a clamping shaft 32 is arranged around the rectangular frame 311, and a clamping groove adapted to the clamping shaft 32 is arranged at the top end of the outer periphery of the shell support 1 to hold up the combined shell 31. In order to avoid easy disengagement, an elastic clamp is fixed at the clamping groove of the shell support 1 to limit the clamping shaft 32, thereby achieving the purpose of fixing the clamping shaft 32.

[0046] Optionally, the supporting plate 2 comprises a centrifugal tube supporting plate 21, and the centrifugal tube supporting plate 21 has at least one centrifugal tube supporting hole 22. The positions of the centrifugal tube supporting holes 22 correspond to the through holes, and the number of the centrifugal tube supporting holes 22 should be the same as that of the through holes, so as to ensure that the positions of the centrifugal tube and the centrifugal tube cover correspond one by one. The number of the centrifugal tube supporting holes 22 can be customized according to requirements. In the embodiment, the number of the centrifugal tube supporting holes 22 is 27.

[0047] The temporary assembly comprises a correction plate 36 and two movable blocking plates 33 arranged on both sides of the correction plate 36. The correction plate 36 is provided with a through slot for the centrifugal tube cover to pass through the through hole, and the blocking plate 33 is provided with a through hole adapted to the size of the through slot. When the blocking plate 33 is moved, the through hole and the through slot are coaxial, and the through hole and the through slot form a storage position to store the centrifugal tube cover. When the blocking plate 33 is moved, the through hole and the through slot are coaxial, and the through hole and the through slot form a dropping position to make the centrifugal tube cover fall onto the centrifugal tube under the action of gravity. It should be noted that the through hole of the combined shell 31, the through slot of the correction plate 36 and the through hole of the blocking plate 33 are coaxially arranged and have the same diameter.

[0048] When the two blocking plates 33 move relative to the combined shell 31, the moving directions of the two blocking plates 33 are the same or opposite, so that synchronous operation can be realized when a person operates with both hands. In order to facilitate the resetting of the blocking plate 33 after operation, the two ends of the blocking plate 33 are provided with a pulling structure 34 and an elastic expansion piece 35, respectively. The free end of the elastic expansion piece 35 is fixed to the inner wall of the combined shell 31, and the free end of the pulling structure 34 extends to the outside through the combined shell 31.

[0049] It should be noted that when the two pulling structures 34 are arranged on the same side, the through hole of the blocking plate 33 and the through slot of the correction plate 36 change from being coaxial to being non-coaxial by the movement of the blocking plate 33, and the two blocking plates 33 move in the same direction; when the two pulling structures 34 are arranged on opposite sides, the through hole of the blocking plate 33 and the through slot of the correction plate 36 change from being non-coaxial to being coaxial by the movement of the blocking plate 33, and the two blocking plates 33 move in opposite directions. In the embodiment, the two pulling structures 34 are arranged on opposite sides.

[0050] Specifically, the elastic and telescopic member 35 can be a component with telescopic elasticity in the prior art, for example, a spring or a rubber band. In the embodiment, a spring is selected. In order to facilitate the connection and installation of the spring with the combined shell 31 and the blocking plate 33, a mounting piece is fixed on the blocking plate 33 and connected with one end of the elastic and telescopic member 35. The other end of the spring is fixed with the combined shell 31 through a right-angle piece.

[0051] In order to stably limit the blocking plate 33 at a certain position after the operation of the blocking plate 33, and keep the through hole of the combined shell 31, the through slot of the correction plate 36 and the through hole of the blocking plate 33 coaxial, optionally, the pulling structure 34 includes a fixed piece 341 fixed on the blocking plate 33, and a circular shaft 342 rotatably connected to the fixed piece 341. The free end of the circular shaft 342 is fixed with a blocking piece.

[0052] In order to provide space for the operation of the pulling structure 34, an activity window for the blocking piece to enter and exit is provided on the combined shell 31. In the embodiment, the pulling structure 34 is arranged on opposite sides, so two activity windows are provided on the rectangular frame 311 to provide space for the operation of the pulling structure 34.

[0053] The rotating connection mode of the fixed piece 341 and the circular shaft 342 in the embodiment is as follows: an axle hole is provided on the fixed piece 341, and the circular shaft 342 is rotatably connected in the axle hole. A anti-disengagement block is fixed on one end of the circular shaft 342 to avoid disengagement. A fixing piece is movably sleeved on the circular shaft 342 and fixed with the combined shell 31 to provide guidance and keep the movement of the circular shaft 342 stable. Due to the rotatability of the circular shaft 342 and the fixed piece 341, the blocking piece can be rotated outside when it is disengaged from the combined shell 31, and the through hole of the combined shell 31, the through slot of the correction plate 36 and the through hole of the blocking plate 33 can be kept coaxial when the blocking piece contacts the outer wall of the combined shell 31.

[0054] The blocking piece includes a clamping block 343 fixed with the circular shaft 342, a sliding bar 344 movably connected to the clamping block 343, a pulling shell 346 fixed with the sliding bar 344 through a connecting rod 345, and a rubber shell 347 fixed on the inner wall of the pulling shell 346. Further, the inner wall of the rubber shell 347 is matched with the inner wall of the pulling shell 346, and anti-slip lines are additionally provided on the inner wall of the rubber shell 347.

[0055] It should be noted that the circular shaft 342 is fixed with a clamping block 343, a clamping groove is formed on the clamping block 343, and the sliding bar 344 is detachably clamped in the clamping groove, and the clamping groove and the sliding bar 344 are in damping sliding insertion connection; the size of the clamping block 343 is sufficient to pass through the movable window on the combination shell 31; the insertion movement direction of the clamping block 343 is perpendicular to the movement direction of the circular shaft 342, so as to avoid the disengagement of the sliding bar 344 and the clamping block 343 when the connecting rod 345 is pulled; in order to increase the resistance when pulling, a pull shell 346 is arranged. The pull shell 346 is in the shape of a hemispherical shell, and a rubber shell 347 is attached to the inner wall of the pull shell 346. The elastic characteristics of the rubber shell 347 are used to adapt to the wrapping of the centrifugal tube cover. The anti-skid lines on the rubber shell 347 can increase the friction between the centrifugal tube cover and the rubber shell 347.

[0056] In this example, it should be noted that the capacity of the centrifugal tube is various, and there are press type and spiral type. The present embodiment only operates the press type centrifugal tube, for example, a 50ml press type centrifugal tube. When batch reagent addition of the centrifugal tube is needed, the storage box 3 is first removed from the shell support 1, and then the centrifugal tube is placed in the shell support 1 through the centrifugal tube support hole 22; the pulling structure 34 on the upper side of the blocking plate 33 is pulled to pull the clamping block 343 out of the combination shell 31, at this time the elastic expansion piece 35 is elongated under stress, and the rotating clamping block 343 makes the clamping block 343 contact with the end face of the combination shell 31; then the required test tube cover is put into the through slot of the correction plate 36 through the through hole of the combination shell 31 and the through hole of the blocking plate 33; the clamping block 343 is rotated until it returns to the original position under the action of the deformation recovery of the elastic expansion piece 35, and the storage of the centrifugal tube cover is completed. When the required reagent is added in turn, the storage box 3 can be directly taken out and placed, which can avoid repeated operation of the cover and the centrifugal tube, and there is no need for numbering. When the reagent addition is completed, the through hole of the blocking plate 33 can be pulled down to make the through hole of the blocking plate 33 coaxial with the through hole of the combination shell 31, and the centrifugal tube falls on the centrifugal tube under the action of gravity; the manual pairing error is avoided, and the efficiency is improved.

[0057] When a 50ml press type centrifugal tube is taken as an example; when the centrifugal tube and the centrifugal tube cover are needed to cooperate, the sliding bar 344 is separated from the clamping block 343, the structure composed of the sliding bar 344 and the rubber shell 347 is held, aligned with the centrifugal tube cover, and the centrifugal tube is limited; at this time, the sliding bar 344 is pressed to make the centrifugal tube and the centrifugal tube cover form an interference fit connection after pressing, so that the combination of the centrifugal tube and the centrifugal tube cover is completed.

[0058] Example two

[0059] This embodiment is further optimized on the basis of example one, and the same parts as the foregoing technical solutions will not be described here, such as Figures 1-6As shown, further for better implementation of the utility model, especially adopt the following setting mode:

[0060] The inner bottom of the shell support 1 is provided with a fixer 4 for fixing the centrifugal tube;

[0061] The fixer 4 comprises a positioning plate 41 provided on the inner bottom of the shell support 1, the upper side of the positioning plate 41 is provided with at least one clamping groove 42, the position of the clamping groove 42 corresponds to the centrifugal tube holder hole 22, the upper side of the clamping groove 42 is provided with a pressing plate 43, at least one hoop hole 44 is formed in the pressing plate 43, the pressing plate 43 is sleeved on the clamping groove 42 through the hoop hole 44;

[0062] It should be noted that the positioning plate 41 is adapted to the inner cavity of the shell support 1, the number of the clamping groove 42 can be set according to requirements, in the embodiment, the number of the clamping groove 42 is the same as that of the centrifugal tube holder hole 22, both are 27; the number of the hoop hole 44 is the same as that of the clamping groove 42.

[0063] The clamping groove 42 comprises a round plate 421 fixed on the positioning plate 41, a plurality of circumferentially arranged upright elastic pieces 422 are arranged on the round plate 421, the middle part of the upright elastic piece 422 is provided with a protrusion along the radial direction of the positioning plate 41, when the pressing plate 43 slides to the protrusion relative to the clamping groove 42, the clamping groove 42 abuts against the centrifugal tube fixed on the round plate 421. Optionally, both ends of the pressing plate 43 extend to the outside of the shell support 1, and a rectangular window is formed on both sides of the shell support 1 to provide the up-down moving space of the pressing plate 43; the both ends of the pressing plate 43 are fixed with a restoring spring 45 to support the pressing plate 43.

[0064] It should be noted that the diameter of the circle formed by the upright elastic piece 422 is not less than the diameter of the centrifugal tube, so as to ensure that the centrifugal tube can be inserted between the plurality of upright elastic pieces 422, at the same time, the upright elastic piece 422 has a certain bending characteristic, so that when the pressing plate 43 is sleeved on the upright elastic piece 422 through the hoop hole 44, the protrusion region of the upright elastic piece 422 can be deformed to bend towards the axis of the round plate 421, and the upright elastic piece 422 abuts against the centrifugal tube, so as to achieve the purpose of batch rapid fixing; when the pressing plate 43 is separated from the protrusion region of the upright elastic piece 422, that is, the pressing plate 43 is located on the upper side or the lower side of the protrusion region, the upright elastic piece 422 does not abut against the centrifugal tube. In the embodiment, when the restoring spring 45 supports the pressing plate 43, the hoop hole 44 on the pressing plate 43 is sleeved on the upright elastic piece 422, that is, located on the upper side of the protrusion region.

[0065] Embodiment three

[0066] The embodiment is further optimized on the basis of the embodiment one or two, and the same parts as the foregoing technical solutions will not be described here again, such as Figures 7-9 As shown, further for better implementation of the utility model, especially adopt the following setting mode:

[0067] The shell support 1 comprises two transverse plates 11, two longitudinal plates 12 and a bottom plate 13, the two transverse plates 11 or the two longitudinal plates 12 are oppositely arranged, and the four edges of the bottom plate 13 are connected with the transverse plates 11 and the longitudinal plates 12 respectively; in order to facilitate integration, the four edges of the bottom plate 13 are provided with tongue plates, the transverse plates 11 and the longitudinal plates 12 are correspondingly provided with insertion grooves for the tongue plates, and the tongue plates are provided with a bayonet; when the tongue plate is inserted into the insertion groove, the side edge of the bayonet is flush with one side of the transverse plate 11 or the longitudinal plate 12, the bayonet is provided with a clamping hook, and the tongue plate is limited from being separated from the insertion groove by cooperation of the clamping hook and the clamping buckle.

[0068] The above is only the preferred embodiment of the present application, which is only illustrative but not restrictive. It is understood by those skilled in the art that many changes, modifications and even equivalents can be made to the present application within the spirit and scope of the present application, but all will fall within the protection scope of the present application.

Claims

1. A rack of centrifuge tubes, characterized in that, The application relates to a centrifugal tube storage box, which comprises a shell support (1) with an inner cavity for placing centrifugal tubes, at least one supporting plate (2) arranged in the inner cavity and fixed with the shell support (1) to support the centrifugal tubes to stand upright, and a storage box (3) arranged on the shell support (1) to store centrifugal tube covers, wherein the storage box (3) comprises a combined shell (31) and a temporary storage assembly arranged in the combined shell (31). The combined shell (31) is provided with a through hole corresponding to the position of the centrifugal tube. The temporary storage assembly comprises a correction plate (36) and two movable blocking plates (33) arranged on the two sides of the correction plate (36), the correction plate (36) is provided with a through slot for the centrifugal tube cover to pass through the through hole, the blocking plate (33) is provided with a through hole matched with the through slot in size, the through hole and the through slot are coaxial when the blocking plate (33) is moved, and the through hole and the through slot form a storage position to store the centrifugal tube cover; the through hole and the through slot are non-coaxial when the blocking plate (33) is moved, and the through hole and the through slot form a dropping position to make the centrifugal tube cover fall on the centrifugal tube under the action of gravity.

2. The centrifuge tube rack of claim 1, wherein, The two ends of the blocking plate (33) are respectively provided with a pulling structure (34) and an elastic expansion piece (35), the free end of the elastic expansion piece (35) is fixed with the inner wall of the combined shell (31), and the free end of the pulling structure (34) extends to the outside through the combined shell (31).

3. The centrifuge tube rack of claim 2, wherein, When the two blocking plates (33) move relative to the combined shell (31), the moving directions of the two blocking plates (33) are the same or opposite.

4. The centrifuge tube rack of claim 2, wherein, The pulling structure (34) comprises a fixed sheet (341) fixed on the blocking plate (33), a round shaft (342) rotatably connected to the fixed sheet (341), and a blocking piece fixed to the free end of the round shaft (342).

5. The centrifuge tube rack of claim 4, wherein, An activity window is formed in the combined shell (31) for the blocking piece to enter or exit.

6. The centrifuge tube rack of claim 1, wherein, Operation openings are formed in the two opposite side walls of the shell support (1) for taking and placing the storage box (3).

7. The centrifuge tube rack of claim 4 wherein, The blocking piece comprises a clamping block (343) fixed with the round shaft (342), a sliding strip (344) movably connected to the clamping block (343), a pulling shell (346) fixed with the sliding strip (344) through a connecting rod (345), and a rubber shell (347) fixed to the inner wall of the pulling shell (346).

8. The centrifuge tube rack of claim 7, wherein, The rubber shell (347) is matched with the inner wall of the pulling shell (346), and anti-skid lines are additionally arranged on the inner wall of the rubber shell (347).

9. The centrifuge tube rack of any one of claims 1-8, wherein, The supporting plate (2) comprises a centrifugal tube supporting plate (21) provided with at least one centrifugal tube supporting hole (22), and the position of the centrifugal tube supporting hole (22) corresponds to the through hole.

10. The centrifuge tube rack of claim 9, wherein, The inner bottom of the shell support (1) is provided with a fixer (4) for fixing the centrifugal tube. The fixing device (4) comprises a positioning plate (41) arranged at the bottom of the shell support (1), the upper side of the positioning plate (41) is provided with at least one clamping groove (42), the position of the clamping groove (42) corresponds to the centrifugal tube groove (22), the upper side of the clamping groove (42) is provided with a pressing plate (43), the pressing plate (43) is provided with at least one hoop hole (44), the pressing plate (43) is sleeved on the clamping groove (42) through the hoop hole (44); The clamping groove (42) comprises a round plate (421) fixed on the positioning plate (41), the round plate (421) is provided with a plurality of circumferentially arranged straight elastic pieces (422), the middle part of the straight elastic piece (422) is provided with a protrusion in the radial direction of the positioning plate (41), when the pressing plate (43) and the clamping groove (42) are relatively slid to the protrusion, the clamping groove (42) abuts against the centrifugal tube fixed on the round plate (421).

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