CN106513078A - Test tube rack and biological substance separating assembly - Google Patents

Abstract

The invention relates to a test tube rack and a biological substance separation component, belonging to the field of biological experiment equipment. The test tube rack includes a support frame and a base. The supporting frame is provided with a plurality of containing tubes with one end closed, and the open end of each containing tube forms a test tube hole for the test tube to enter into the containing tube. The base is provided with a cavity for containing the refrigerated working fluid, and the support frame is connected with the base so that the outer wall of the containing tube extends into the cavity. The test tube rack contains the working solution to make it more stable and provide low temperature conditions for the experiment. The bottom of the test tube rack is provided with a non-slip pad to prevent it from moving, and the anti-rotation groove is set in the containing tube to prevent the material separation test tube and the grinding tube from rotating during operation, so that the test tube rack and the test tube in the containing tube have dual stability. The biological substance separation component includes the above-mentioned test tube rack and the material separation test tube and grinding tube matched with the holding tube. It can directly stir and mix biological tissue samples on the test tube rack, remove waste liquid, separate substances and grind at low temperature, and has a stable operation. characteristic.

Description

Test Tube Racks and Biomass Separation Components

technical field

The invention relates to the field of biological experiment equipment, in particular to a test tube rack and a biological substance separation component.

Background technique

Currently used test tube racks are mainly frame structures made of aluminum alloy, wood or plastic, which are used to support test tubes and provide a temporary storage platform and operating platform for samples for chemical and biological experiments.

However, the stability of the existing test tube rack is not high. When performing experimental operations on the test tube rack, the test tube rack is easy to move with the operation action, causing the test tube rack to be overturned and the sample to be spilled.

At the same time, in biological experiments, tissue grinding and collection of biological samples usually need to be carried out under low temperature conditions, otherwise it will lead to inaccurate experimental results and even degradation of biological tissue samples. In existing experimental operations, biological samples are usually placed in a refrigeration device such as a refrigerator or placed in an ice-water bath for experimental operations. However, the use of refrigeration equipment such as refrigerators requires a dedicated refrigerator, which is costly; at the same time, the space in the refrigerator is small, which is not conducive to operation and observation. Experimental operations using ice-water baths also require a dedicated ice maker, which is expensive, cumbersome to make ice, and requires a dedicated ice container.

Contents of the invention

The object of the present invention is to provide a test tube rack, which is characterized in that it has the ability to prevent the test tube rack from moving with the operation action, prevent the test tube from rotating during material separation, liquid stirring and grinding, and provide low temperature conditions for experimental operations.

Another object of the present invention is to provide a biological substance separation assembly, which can directly perform stirring and mixing of biological tissue samples on a test tube rack, waste liquid removal, material separation and cryogenic grinding, and has high operational stability.

Embodiments of the present invention are achieved like this:

A test tube rack, which includes a support frame and a base. The support frame is provided with a plurality of storage tubes with one end closed. The open end of each storage tube forms a test tube hole for the test tube to enter the storage tube. The base is provided with a The cavity of the support frame is connected with the base so that the outer wall of the containing tube extends into the cavity.

The cavity is filled with freezing liquid to provide a low temperature environment for the test tube. Preferably, a non-slip mat is provided at the bottom of the test tube rack. While the working fluid increases the weight of the test tube rack and lowers the center of gravity of the test tube rack, the anti-slip mat produces an anti-skid effect, preventing the test tube rack from moving with the operation.

Furthermore, the inner bottom of the containing tube is provided with anti-rotation grooves to prevent the material separation test tube and the grinding tube from rotating during operation, so that the test tube rack and the test tubes in the containing tube have double stability.

A biological substance separation assembly includes the above-mentioned test tube rack, a substance separation tube and a grinding tube matched with the containing tube.

The beneficial effects of the embodiments of the present invention are:

The test tube rack provided by the present invention is provided with a cavity for containing the frozen working fluid in the base. On the one hand, the frozen working fluid can increase the weight of the test tube rack, lower the center of gravity of the test tube rack, and at the same time make the anti-skid pad at the bottom of the test tube rack produce an effect. , so as to increase the stability of the test tube rack; on the other hand, the outer wall of the containing tube extends into the cavity to contact the frozen working fluid, and the test tube rack can be refrigerated or frozen before the experimental operation to make the working fluid in the cavity It is low temperature, and the temperature of the working fluid is conducted to the inside of the holding tube during the experimental operation, providing a low temperature environment for the holding and the biological tissue samples in the test tube in the holding tube.

The biological substance separation component provided by the present invention uses the test tube rack as a sample storage and experimental operation platform, and can directly perform operations such as material separation, waste liquid removal, liquid stirring, and low-temperature grinding on biological tissue samples on the test tube rack, and the operation is stable. high sex.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the test tube rack that the embodiment of the present invention provides;

Fig. 2 is a structural schematic view of another perspective of the test tube rack provided by the embodiment of the present invention;

Fig. 3 is the sectional view of the test tube rack provided by the embodiment of the present invention;

Figure 4. Partial enlarged view of Ⅲ in Figure 3;

FIG. 5 is a schematic structural view of a grinding tube provided by an embodiment of the present invention;

6 is a cross-sectional view of a grinding tube provided by an embodiment of the present invention;

7 is a cross-sectional view of another structure of the grinding tube provided by the embodiment of the present invention;

Fig. 8 is a cross-sectional view of another structure of the grinding tube provided by the embodiment of the present invention;

Fig. 9 is a schematic structural view of a grinding core provided by an embodiment of the present invention;

Fig. 10 is a schematic structural view of another structure of a grinding core provided by an embodiment of the present invention;

Fig. 11 is a schematic structural view of another structure of the grinding core provided by the embodiment of the present invention.

Icon: 100-test tube rack; 110-support frame; 111-accommodating tube; 112-test tube hole; 113-anti-rotation groove; 120-base; 121-cavity; 122-bottom plate; 123-liquid inlet; Cover; 125-anti-slip pad; 126-flange; 127-first pouring groove; 128-step; 129-outer edge; 130-flange; 131-side plate; 132-second pouring groove; 210-first pipe body; 211-bump; 212-limiting block; 220-second pipe body; 221-nozzle; 222-boss; 300-grinding core; 310-grinding head; 312-groove; 313-grinding plane; 320-grinding rod; 330-connecting sleeve; 331-reinforcing rib.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, or the The usual orientation or positional relationship of the invention product in use is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "parallel", "perpendicular" and the like do not mean that the components are absolutely parallel or perpendicular, but may be slightly inclined. For example, "vertical" only means that its direction is more vertical than another specified direction, and it does not mean that the structure must be completely perpendicular to another direction, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise specified and limited, the terms "arrangement", "connection" and "connection" should be understood in a broad sense. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

This embodiment provides a biological matter separation assembly (not shown), which mainly includes a biological matter separator (not shown), a test tube rack 100 , a grinding tube 200 , a material separation test tube (not shown) and a grinding core 300 . The test tube rack 100 is used to fix the grinding tube 200 and the material separation test tube, so as to facilitate operations such as material separation, waste liquid removal, liquid stirring and cryogenic grinding on biological tissue samples. The rotating end (not shown) of the biomass separator is detachably connected with the grinding core 300, and the grinding core 300 can be inserted into the grinding tube 200 for grinding operation.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , the test tube rack 100 includes a supporting frame 110 and a base 120 connected thereto. The base 120 is provided with a cavity 121 for containing a working fluid. The freezing working fluid can be water, or commercially available cooling fluid such as ethyl malonate or ethyl acetate mixed with dry ice. The support frame 110 is provided with a plurality of accommodating tubes 111 with one end closed, and the outer side walls of the accommodating tubes 111 protrude into the cavity 121 .

Accommodating tube 111 is used for accommodating test tubes, such as grinding tube 200 and substance separation test tube, and the open end of accommodating tube 111 forms the test tube hole 112 for entering the test tubes such as grinding tube 200 etc. into accommodating tube 111; Extending into the cavity 121 for contacting the refrigerated working fluid in the cavity 121 .

Please refer to Fig. 2 and Fig. 3 together, the inner bottom of the containing tube 111, that is, the inner bottom wall of the closed end of the containing tube 111, is provided with an anti-rotation groove 113. In this embodiment, the anti-rotation groove 113 in the same containing tube 111 The number is four, and the four anti-rotation grooves 113 are evenly distributed along the axis of the housing tube 111 and communicate with each other in a "cross shape". In other embodiments of the present invention, the number of anti-rotation grooves 113 can also be 1, 2, 3, 5 or others, preferably the number is 2 or more and evenly distributed in the Insole.

Please continue to refer to FIG. 3 , the cavity 121 is located at the bottom of the test tube rack 100 , and the base 120 is provided with the cavity 121 for containing the refrigerated working fluid. On the one hand, the weight of the test tube rack 100 can be increased by injecting water into the cavity 121 as the freezing working fluid, and the center of gravity of the test tube rack 100 can be lowered. At the same time, the anti-skid structure arranged at the bottom of the test tube rack 100 can be effectively prevented from moving with the operation. , thereby enhancing the stability of the test tube rack 100, preventing the test tube rack 100 from moving with the operation, and avoiding the occurrence of the sample spilling caused by the test tube rack 100 being knocked over.

On the other hand, it is possible to fill the cavity 121 with low-temperature water or refrigerating fluid as the freezing working fluid according to the requirements of the experimental temperature, or pre-place the test tube rack 100 filled with water or refrigerating fluid under low temperature conditions for freezing or refrigerating. . Since the outer wall of the housing tube 111 protrudes into the cavity 121, the temperature of the refrigerated working fluid in the cavity 121 can be transferred to the lumen of the housing tube 111 through the outer wall of the housing tube 111 when it contacts the outer wall, thereby providing The biological tissue samples and the like in the holding tube 111 provide a low-temperature environment to prevent degradation of the samples.

3 and 4 together, the base 120 includes a bottom plate 122 and an annular side plate 131, the support frame 110 is integrally connected with one end of the side plate 131 to close an opening of the side plate 131, and the bottom plate 122 closes the side plate 131. The other opens and forms a cavity 121 for accommodating refrigerated working fluid.

The bottom plate 122 is provided with a liquid inlet 123 communicating with the cavity 121, which is used to fill the cavity 121 with refrigerated working fluid or discharge the refrigerated working fluid from the cavity 121, so that different cooling fluids can be selected according to different temperature requirements. As a frozen working fluid. The bottom plate 122 also includes a sealing cover 124 matched with the liquid inlet 123 for closing the liquid inlet 123 . Certainly, in other embodiments of the present invention, the liquid inlet 123 may also be opened at other positions such as the side plate 131 , or the refrigerated working fluid may be sealed in the cavity 121 before the test tube rack 100 is assembled.

In this embodiment, the liquid inlet 123 has an internal thread, the sealing cap 124 is provided with an external thread matching the liquid inlet 123 , and the liquid inlet 123 is threadedly connected with the sealing cap 124 . Since the temperature of the working fluid will change, the test tube rack 100 will also be deformed due to thermal expansion and contraction. The threaded connection can prevent the frozen working fluid from passing through the sealing cover 124 and the liquid inlet 123 during thermal expansion and contraction. The gap between them flows out, causing the phenomenon of leakage.

The side of the bottom plate 122 away from the support frame 110 is provided with a plurality of anti-skid pads 125, which produce an anti-skid effect under the action of the gravity of the working fluid, can prevent the test tube rack 100 from moving on the test bench, and further increase the stability of the test tube rack 100. A plurality of anti-skid pads 125 are preferably evenly distributed on the edge of the side plate 131 .

Please continue to refer to FIG. 4 , a flange 126 protruding toward the outside of the bottom plate 122 is disposed on an edge of the bottom plate 122 , and an end of the side plate 131 away from the support frame 110 is connected to the flange 126 to form a cavity 121 .

The flange 126 is bonded to the side plate 131 by adhesive. Specifically, the flange 126 is provided with a first perfusion groove 127, and the side plate 131 is provided with a second perfusion groove 132 matched with the first perfusion groove 127. The first perfusion groove 127 and the second perfusion groove 132 are oppositely arranged, and the first Both the pouring groove 127 and the second pouring groove 132 are filled with adhesive so that the bottom plate 122 closes an opening of the side plate 131 . The adhesive is poured into the first pouring groove 127 and the second pouring groove 132, so that the flange 126 and the side plate 131 can be closely attached; in addition, a welding operation has been carried out between the flange 126 and the side plate 131 to enhance The stability of the bond between the flange 126 and the side plate 131 and the sealing performance to the opening.

In order to further enhance the stability and airtightness of the connection between the flange 126 and the side plate 131, in this embodiment, the thickness of the bottom plate 122 is greater than the thickness of the flange 126, and a step 128 is formed at the junction of the bottom plate 122 and the flange 126, and the bottom plate 122 The side wall connected to the flange 126 forms an outer edge 129 at the step 128 , and the side plate 131 is snugly engaged with the outer edge 129 of the bottom plate 122 at the step 128 . Further, the end of the flange 126 away from the bottom plate 122 is bent toward the support frame 110 to form a flange 130 , and the flange 130 and the step 128 form a groove for receiving the end of the side plate 131 connected to the flange 126 to make the connection tighter.

It should be noted that the above connection method is only the preferred implementation method of this embodiment. In other embodiments of the present invention, the connection method between the bottom plate 122 and the side plate 131 can adopt the above-mentioned bonding, welding, and interference clamping according to actual needs. And a combination of one or more of the designs of the flanging 130 .

Since the support frame 110 is provided with a plurality of accommodating tubes 111, its internal structure is relatively dense. In this embodiment, the test tube rack 100 is connected by two components, the side plate 131 and the bottom plate 122 formed separately, and the test tube is prepared by integral molding. Compared with the frame 100, the injection molding process is simple and the manufacturing cost is low.

This embodiment also provides a grinding tube 200 , which can extend into the containing tube 111 and cooperate with the containing tube 111 . Please refer to FIG. 5 , the grinding tube 200 includes a first tube body 210 and a second tube body 220 which communicate, and the end of the first tube body 210 away from the second tube body 220 is closed and can extend into the inside of the containing tube 111; An end of the second tube body 220 away from the first tube body 210 forms a nozzle 221 .

The outer wall ring of the second tube body 220 away from the first tube body 210 is provided with a boss 222, the outer diameter of the boss 222 is greater than the outer diameter of the test tube hole 112, so that the nozzle 221 of the second tube body 220 is located in the test tube hole 112 above, it is convenient to take out the grinding tube 200 from the containing tube 111.

The outer wall of the first tube body 210 is provided with four limiting blocks 212 extending along the axial direction of the grinding tube 200 , and the four limiting blocks 212 are evenly distributed and cooperate with the above-mentioned anti-rotation groove 113 . When the grinding tube 200 is inserted into the containing tube 111 , the limiting block 212 can be arranged in the anti-rotation groove 113 to prevent the grinding tube 200 from rotating in the containing tube 111 . In other embodiments of the present invention, the number of anti-rotation grooves 113 is 1, 2, 3, 5 or others, preferably 2 or more and evenly distributed on the inner bottom , which can enhance the fixing effect of the receiving tube 111 on the grinding tube 200 .

Referring to FIG. 6 , the inner diameter of the first tube body 210 gradually decreases along the side away from the nozzle 221 , and the inner sidewall of the first tube body 210 is provided with a plurality of protrusions 211 along the axis of the first tube body 210 .

This embodiment provides a strip-shaped bump 211 , the cross section of which is arc-shaped and protrudes toward the inside of the first tube body 210 . The angle formed between the extension line of the protrusion 211 and the axis of the grinding tube 200 is an obtuse angle or an acute angle, that is, the strip-shaped protrusion 211 is not parallel or perpendicular to the axis of the grinding tube 200 .

The strip-shaped protrusion 211 adopts the above-mentioned arrangement inclined relative to the axial direction of the grinding tube 200 , and surrounds the inner sidewall of the first tube body 210 . Preferably, the protrusions 211 are uniformly distributed on the inner sidewall of the first tube body 210 , and two adjacent protrusions 211 are parallel to each other and have equal spacing.

Please refer to FIG. 7 , in addition to the above arrangement, the strip-shaped protrusion 211 can also extend from the end of the first tube 210 close to the second tube 220 toward the closed end of the first tube 210, the arrangement is The extension line of the grinding tube 200 is coplanar with the axis of the grinding tube 200 , and a plurality of strip-shaped bumps 211 are radially inside the first tube body 210 . Preferably, the distances between two adjacent protrusions 211 are equal, that is, the distances between two adjacent protrusions 211 at the same height are the same.

In addition, please refer to FIG. 8 , the bumps 211 may also be granular bumps 211 such as hemispherical, and the granular bumps 211 are evenly distributed on the inner wall of the first tube body 210 .

In addition, in other embodiments of the present invention, bumps 211 can also be added on the inner wall of the second tube body 220, such as being evenly distributed along the axial direction of the grinding tube 200 on the side of the second tube body 220 close to the first tube body. 210 at one end and so on.

This embodiment also provides a grinding core 300 , please refer to FIG. 9 , the grinding core 300 includes a grinding head 310 , a grinding rod 320 and a connecting sleeve 330 connected in sequence. The connecting sleeve 330 is sleeved on the rotating end of the biomass separator for driving the grinding rod 320 and the grinding head 310 to rotate. The grinding core 300 extends into the grinding tube 200 so that the grinding rod 320 is located in the second tube body 220 , and the grinding head 310 cooperates with the bump 211 in the first tube body 210 to grind the sample.

The arc-shaped protruding bumps 211 in the grinding tube 200 can increase the roughness of the inner wall of the grinding tube 200 and increase the friction between the grinding head 310 and the inner wall of the first tube body 210, thereby enhancing the cooperation between the grinding core 300 and the grinding tube 200. The cutting effect makes the grinding more fully.

Since the grinding head 310 rotates with the axis of the grinding tube 200 as the rotation axis during operation. If the strip-shaped protrusions 211 are arranged along a direction perpendicular to the axis of the grinding tube 200 , the extending direction of the strip-shaped protrusions 211 is parallel to the rotation direction of the grinding head 310 , and the cutting effect is not good. Since the inner diameter of the first tube body 210 is tapered, if the strip-shaped bumps 211 are arranged along the axis of the grinding tube 200 , the bumps 211 cannot spread all over the inner wall of the first tube body 210 , and the grinding effect is not good.

When the strip-shaped bumps 211 are arranged "inclined" according to the above-mentioned method or the bumps 211 are set in a discontinuous granular form such as a hemisphere, the bumps 211 cover the inner wall of the first pipe body 210, and the gap between the bumps 211 and the grinding head 310 The greater the shearing force, the better the cutting effect.

The connecting sleeve 330 is detachably connected to the grinding rod 320 , which is convenient for replacing the connecting sleeve 330 and the grinding rod 320 . Since the grinding core 300 abuts against the inner wall of the grinding tube 200 during the grinding process, it will rebound a large pressure on the connecting sleeve 330 , causing the connecting sleeve 330 to be easily damaged. In the detachable connection mode, when the connecting sleeve 330 is damaged, only the connecting sleeve 330 needs to be replaced, which can increase the service life of the grinding core 300 . At the same time, the detachable connection method is also conducive to the replacement of the grinding core 300 among different biological samples, which can effectively avoid cross-contamination of biological samples.

The outer wall of the connecting sleeve 330 is provided with a plurality of reinforcing ribs 331 along its axial direction, and the multiple reinforcing ribs 331 are evenly distributed on the outer wall of the connecting sleeve 330 , that is, the distance between two adjacent reinforcing ribs 331 is equal. The setting of the reinforcing rib 331 can improve the strength of the connecting sleeve 330 and enhance its service life. At the same time, the reinforcing rib 331 can enhance the frictional force of the outer wall of the connecting sleeve 330 , so that the connecting sleeve 330 can be stably sleeved on the rotating end. The plurality of reinforcing ribs 331 is also beneficial to keep the grinding core 300 perpendicular to the partition of the packaging box when packed in a box, so as to facilitate the connection to the rotating end of the biological matter separator during operation.

In the embodiment provided by the present invention, the outer diameter of the end of the grinding head 310 connected to the grinding rod 320 is the same as the outer diameter of the grinding rod 320 , and the outer diameter of the grinding head 310 gradually decreases along the end away from the connecting sleeve 330 . Since the internal volume of the grinding tube 200 is small, this arrangement reduces the volume of the grinding head 310 and prevents the grinding head 310 from squeezing the sample out of the grinding tube 200 . In addition, this arrangement is matched with the first tube body 210 whose inner diameter gradually decreases, so that the side wall of the grinding head 310 can fully contact the inner side wall of the first tube body 210 to improve the grinding effect.

Please refer to FIG. 10 and FIG. 11 together. In order to further improve the grinding effect of the grinding head 310 , in this embodiment, the grinding head 310 is provided with ribs 311 , and the samples are cut using the ribs 311 .

Please refer to FIG. 10 , a groove 312 is opened on the outer wall of the grinding head 310 , and a rib 311 for cutting the sample is formed at the opening of the groove 312 . In this embodiment, the groove 312 is spirally arranged from one end close to the grinding rod 320 to one end away from the grinding rod 320 , so that the rib 311 can cut the sample in both the horizontal and vertical directions, and the grinding effect is good.

Preferably, the screw-in direction of the helically arranged groove 312 is opposite to the rotation direction of the grinding head 310, that is, if the grinding head 310 rotates clockwise, the groove 312 is a left-handed thread that is screwed in counterclockwise; If the grinding head 310 rotates counterclockwise, the groove 312 is a right-handed thread that is screwed in a clockwise direction. This arrangement enables the liquid to move along the groove 312 in a direction opposite to the rotation direction of the rotary head during the grinding process, lowers the center of gravity of the liquid in the grinding tube 200 , and prevents the liquid from being thrown out with the rotation of the grinding head 310 .

In addition, referring to Fig. 11, it is also possible to cut and form three grinding planes 313 of the same size and shape at the end of the grinding head 310 away from the grinding rod 320 so that the end of the grinding head 310 away from the grinding rod 320 is a regular triangular pyramid structure. The outer diameter of the head 310 represents the radius of the circumscribed circle of the polygon at its cross section.

Two adjacent grinding planes 313 intersect to form a rib 311 for cutting. The end of the grinding head 310 is arranged as a triangular pyramid structure, the angle of the inner angle at the cross section of the rib 311 is smaller, and the cutting effect of the rib 311 is better. The three grinding planes 313 are evenly distributed, so that the cutting effect of the rib 311 is more uniform.

According to the actual situation, the end of the grinding head 310 away from the grinding rod 320 can also be set as a pyramid structure with the same or different side lengths such as quadrangular pyramids, pentagonal pyramids, etc., to improve the grinding effect.

Grinding using the above-mentioned biological substance separation assembly includes: injecting working fluid into the cavity 121 of the test tube rack 100 and pretreating it to meet the temperature requirements during grinding; placing the grinding tube 200 in the containing tube 111 of the test tube rack 100 and using The limit block 212 is located in the anti-rotation groove 113; the grinding core 300 sleeved on the rotating end is inserted into the grinding tube 200 so that the grinding rod 320 is located in the second tube body 220, and the grinding head 310 is against the first tube body 210 The inner wall; start the rotating head, the grinding head 310 rotates for grinding.

In summary, the test tube rack 100 provided by the present invention is provided with a cavity 121 for containing the frozen working fluid in the base 120. While increasing the stability of the test tube rack 100, the working fluid can be pretreated to accommodate tubes. The interior of 111 provides low temperature and other environments. The test tube rack 100 is assembled and connected by components, and compared with integral molding, the injection molding process is simpler and the cost is lower. In addition, the anti-rotation groove 113 can prevent the biological separation test tube and the grinding tube 200 from rotating during the grinding process; the setting of the anti-slip pad 125 can prevent the test tube rack 100 from sliding on the surface of the operating platform under force.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A test tube rack, characterized in that it comprises a support frame and a base, the support frame is provided with a plurality of one-end closed accommodation tubes, and the open end of each said accommodation tube is formed for the test tube to enter the said accommodation tube The base is provided with a cavity for containing the working fluid, and the support frame is connected to the base so that the outer wall of the containing tube extends into the cavity. 2. The test tube rack according to claim 1, wherein the base comprises a bottom plate and an annular side plate, the support frame closes an opening of the side plate, and the bottom plate closes another opening of the side plate. One opening forms the cavity, the base is provided with a liquid inlet communicating with the cavity, and the base also includes a sealing cover matched with the liquid inlet. 3. The test tube rack according to claim 2, wherein the edge of the bottom plate is provided with a flange protruding toward the outside of the bottom plate, and the side plate is connected to the flange and forms the cavity . 4. The test tube rack according to claim 3, wherein the flange is provided with a first perfusion groove, and the side plate is provided with a second perfusion groove matched with the first perfusion groove, and the first perfusion groove is provided with the first perfusion groove. Both the first pouring groove and the second pouring groove are filled with adhesive so that the bottom plate closes an opening of the side plate. 5. The test tube rack according to claim 3, wherein the side plate is welded to the flange. 6. The test tube rack according to claim 3, wherein the thickness of the bottom plate is greater than the thickness of the flange, the joint between the bottom plate and the flange forms a step, and the side plate interferes with the card. connected to the outer edge of the bottom plate and connected to the flange. 7. The test tube rack according to claim 3, characterized in that, the end of the flange away from the bottom plate is bent toward the support frame to form a flange. 8 . The test tube rack according to claim 1 , wherein a plurality of non-slip pads are provided on the side of the base away from the support frame. 9. The test tube rack according to claim 1, wherein an anti-rotation groove is opened on the inner bottom of the containing tube. 10. A biological substance separation assembly, characterized by comprising the test tube rack according to any one of claims 1-9, and a substance separation test tube and a grinding tube matched with the containing tube.