CN219526597U - Device for centrifugal separation of cells - Google Patents

Abstract

The utility model provides a device for centrifugal separation of cells, which comprises an outer cup body, an inner cup body and a cup bottom cover; the inner cup body is arranged in the outer cup body, an interlayer is arranged between the inner wall of the outer cup body and the outer wall of the inner cup body, the cup bottom cover is arranged at the bottom of the outer cup body, and the cup bottom cover is matched with the interlayer to form a centrifugal chamber; the first channel is arranged at the upper part of the centrifugal chamber, and the second channel and the third channel are arranged at the lower part of the centrifugal chamber; the second channel is close to the inner wall of the outer cup body, and the third channel is close to the outer wall of the inner cup body. According to the device for centrifugal separation of cells, provided by the utility model, continuous flow concentration washing treatment of large-volume cell liquid and concentration washing treatment of small-volume cell liquid can be realized through three channels of the centrifugal chamber, so that the application range is wider, and the compatibility is stronger; the separation effect is better and the efficiency is higher.

Description

Device for centrifugal separation of cells

Technical Field

The utility model belongs to the technical field of bioengineering, and particularly relates to a device for centrifugal separation of cells.

Background

In the fields of bioengineering, cell processing and the like, cell liquid is usually required to be concentrated, washed, separated and purified, namely, low-concentration or impurity-containing cell liquid is concentrated and separated, so that the purpose of obtaining high-concentration cell products is achieved, and the loss caused by the scenes of culturing, preserving or transporting subsequent cells is reduced. The common cell concentration and separation mode is a centrifugal sedimentation method, namely, cell liquid is introduced into a rotary centrifugal cup, substances with slightly larger mass such as cells in the cell liquid are driven by centrifugal force to be close to the edge of the centrifugal cup due to the fact that the centrifugal force is related to the self mass, supernatant (waste liquid and liquid which is not wanted to be reserved) in the cell liquid is arranged in the middle of the centrifugal cup, the cell concentrate at the edge of the centrifugal cup is reserved, the process of discharging the supernatant in the middle is called cell concentration and separation, and main indexes of the cell concentration and separation are cell yield and cell activity.

In the prior art, a centrifugal cup is usually in the form of an inlet and an outlet, cell liquid is introduced through the inlet, cell concentrate is reserved in the centrifugal cup, supernatant is discharged through the outlet, and the cell concentrate in the centrifugal cup is required to be transferred when the cell liquid with a large volume is treated due to the limited volume of the centrifugal cup so as to continuously separate the cell liquid; in the cell liquid concentration and separation process, as the concentrated liquid in the centrifugal cup increases, the centrifugal force applied to cells close to the rotation center is smaller, the risk that the cells are discharged along with the waste liquid is larger, and the cell yield is reduced along with the discharge of the waste liquid. Meanwhile, when small-volume cell liquid is treated, a large amount of waste liquid besides the cell concentrate in the centrifugal cup cannot be effectively discharged, so that not only is the concentration of the recovered cell liquid influenced, but also the replacement rate of cell washing is obviously influenced, more washing liquid is needed to replace the waste liquid, and the required time is obviously increased.

Therefore, the centrifugal cup and the centrifugal method in the prior art cannot realize the variable capacity in cell separation, namely cannot realize continuous centrifugal separation. The different cell separation requirements cannot be met, and multiple devices are usually needed to process a large volume of cell fluid and a small volume of cell fluid, and even multiple devices are needed to be matched for use; often, a series of problems such as low cell yield, complex concentration flow, unsatisfactory concentration effect, difficulty in realizing continuous flow centrifugal separation and the like exist.

Disclosure of Invention

In order to solve at least one of the above technical problems, the technical scheme adopted by the utility model is to provide a device for centrifugal separation of cells, which can be applied to most of the demand scenes, namely continuous flow concentration of large-volume cell liquid, single treatment of small-volume cell liquid and high compatibility.

In order to at least achieve one of the above purposes, the present utility model adopts the following technical scheme:

the utility model provides a device for centrifugal separation of cells, which comprises an outer cup body, an inner cup body and a cup bottom cover; the inner cup body is arranged in the outer cup body, an interlayer is arranged between the inner wall of the outer cup body and the outer wall of the inner cup body, the cup bottom cover is arranged at the bottom of the outer cup body, and the cup bottom cover is matched with the interlayer to form a centrifugal chamber; the centrifugal chamber includes a first channel, a second channel, and a third channel; the first channel is arranged at the upper part of the centrifugal chamber, and the second channel and the third channel are arranged at the lower part of the centrifugal chamber; the second channel is close to the inner wall of the outer cup body, and the third channel is close to the outer wall of the inner cup body.

Further, a rotating shaft is arranged on the outer cup body; the rotating shaft is rotatably supported with a cup seat through a bearing.

Further, an axle center deep groove is formed in the cup seat, a bearing groove is formed in the opening end of the axle center deep groove, and the bearing is arranged in the bearing groove.

Further, the rotating shaft is arranged in the shaft center deep groove, and an annular gap is formed between the shaft center deep groove and the rotating shaft.

Further, a first access opening, a second access opening and a third access opening are formed in the cup seat; the first, second and third ports are in fluid communication with the annular gap.

Further, a plurality of sealing ring fixing rings and a plurality of groups of sealing rings are sequentially arranged in the axle center deep groove at intervals; and sealing and isolating the annular gaps through the plurality of groups of sealing rings, wherein the plurality of annular sealing gaps are respectively in fluid communication with the first inlet and outlet, the second inlet and outlet and the third inlet and outlet.

Further, a plurality of fluid channels are arranged in the rotating shaft; the plurality of fluid passages communicate the first inlet and the first passage, the second inlet and the second passage, and the third inlet and the third passage, respectively.

Further, the first inlet and outlet, the second inlet and outlet and the third inlet and outlet can be respectively connected with or share an external peristaltic pump.

Further, the outer cup body and the inner cup body are cylindrical and/or conical.

Further, the cup bottom cover is connected with the centrifugal power device, the cup head seat is fixed through the external locking device, and the outer cup body, the inner cup body, the cup bottom cover and the rotating shaft are driven by the centrifugal power device to rotate at a high speed.

The utility model provides a device for centrifugal separation of cells, which has the beneficial effects that compared with the prior art, the device has the following advantages:

in the device for centrifugal separation of cells, the inner cup body is arranged in the outer cup body, the cup bottom cover is matched with the outer cup body and the inner cup body to form the centrifugal chamber, the centrifugal chamber is provided with three channels, and the three channels are combined with the three inlets and outlets of the cup seat and the fluid channels in the rotating shaft, so that continuous flow concentration and washing treatment of large-volume cell liquid can be realized under the condition that the main body structure and the size of the centrifugal device are not changed, and the application range is wider; meanwhile, the cell liquid with small volume can be concentrated and washed, and the compatibility is stronger.

In the device for centrifugal separation of cells, the first channel is arranged at the upper part of the centrifugal chamber, and the second channel and the third channel are arranged at the lower part of the centrifugal chamber; the second channel is close to the inner wall of the outer cup body, and the third channel is close to the outer wall of the inner cup body; in the concentration process, the separated cells can be collected through the second channel, so that the volume of liquid in the centrifugal cavity is maintained in a stable range, the centrifugal force caused by the reduction of the centrifugal radius due to accumulation is not reduced, and the centrifugal effect is better. Meanwhile, the second channel can also be used for washing the separated cells by introducing washing liquid in the washing process, and the washing process is continuous flow washing, so that the washing efficiency is greatly improved, and the washing time is reduced.

According to the device for centrifugal separation of cells, provided by the utility model, the volume of liquid in the centrifugal cavity can be reduced through the third channel, redundant waste liquid or washing liquid in the centrifugal cavity is discharged, so that the high replacement rate of the cell liquid during concentration and washing is realized, and the separation efficiency is higher.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

FIG. 1 is a schematic view showing the internal structure of an apparatus for centrifugal separation of cells according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing the internal structure of an apparatus for centrifugal separation of cells according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram showing the internal structure of an apparatus for centrifugal separation of cells according to an embodiment of the present utility model;

FIG. 4 is a continuous concentration process for treating a bulk cell fluid in an embodiment of the utility model;

FIG. 5 is a continuous wash process for treating bulk cellular fluids in an embodiment of the utility model;

FIG. 6 is a flow chart of a concentrated wash process for treating small volumes of cell fluid in an embodiment of the utility model;

the centrifugal cup comprises an outer cup body 1, a centrifugal chamber 11, an inner cup body 2, a cup bottom cover 3, a first channel 31, a second channel 32, a third channel 33, a cup holder 4, a first inlet and outlet 41, a second inlet and outlet 42, a third inlet and outlet 43, a rotating shaft 5, a sealing ring fixing ring 51 and a sealing ring 52.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the present utility model will be further described in detail with reference to specific embodiments. It is noted that the embodiments described below are exemplary only for explaining the present utility model, and are not to be construed as limiting the present utility model. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the mechanical connection and the electrical connection can be adopted; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The device for centrifugal separation of cells provided by the utility model is described in detail below by way of specific examples:

as shown in fig. 1-3, the present embodiment provides a device for centrifugal separation of cells, which mainly comprises an outer cup 1, an inner cup 2, a cup bottom cover 3, a cup holder 4, a rotating shaft 5 and other parts.

The inner part of the outer cup body 1 comprises a hollow centrifugal cavity capable of rotating around the central axis, and the cross section of the hollow centrifugal cavity is cylindrical or conical; preferably, the present example is presented in conical form. An inner cup 2 is provided in the hollow centrifugal chamber, and the inner cup 2 includes a hollow centrifugal chamber inside capable of rotating around its center axis. The shape of the outer wall of the inner cup 2 is basically the same as the shape of the inner wall of the outer cup 1, but the size is smaller. An interlayer is formed between the inner wall of the outer cup body 1 and the outer wall of the inner cup body 2.

The cup bottom cover 3 is arranged at the bottom of the outer cup body 1 in a sealing way, the cup bottom cover 3 is matched with the outer cup body 1 and the inner cup body 2 and is in interlayer between the inner wall of the outer cup body 1 and the outer wall of the inner cup body 2 to form a sealed centrifugal chamber 11, and the centrifugal chamber 11 is used for receiving cell liquid to be treated.

The centrifugal chamber 11 comprises a first channel 31, a second channel 32 and a third channel 33. The first channel 31 is arranged at the top of the centrifugal chamber 11 and the second channel 32 and the third channel 33 are arranged at the bottom of the centrifugal chamber 11. Wherein the second channel 32 is adjacent to the inner wall of the outer cup 1 and the third channel 33 is adjacent to the outer wall of the inner cup 2.

The cup seat 4 is provided with an axle center deep groove, the opening end of the axle center deep groove is provided with a bearing groove, and a bearing is arranged in the bearing groove. The cup holder 4 is rotatably supported on the rotary shaft 5 through a bearing. One end of the rotating shaft 5 is arranged on the outer cup body 1, the other end of the rotating shaft is arranged in a shaft center deep groove, and an annular gap is formed between the shaft center deep groove and the rotating shaft 5.

The cup holder 4 is provided with a first inlet and outlet 41, a second inlet and outlet 42, and a third inlet and outlet 43. The first port 41, the second port 42 and the third port 43 are all in fluid communication with the annular gap. The other end of the axial center deep groove is sequentially provided with a plurality of sealing ring fixing rings 51 and a plurality of groups of sealing rings 52 at intervals; the annular gaps are sealed and isolated by a plurality of groups of sealing rings 52, and the isolated three annular sealing gaps are respectively in fluid communication with the first inlet and outlet 41, the second inlet and outlet 42 and the third inlet and outlet 43, so that the first inlet and outlet 41, the second inlet and outlet 42 and the third inlet and outlet 43 are subjected to fluid separation.

Three fluid passages are provided in the shaft 5, and each of the three fluid passages communicates the first inlet and outlet 41 with the first passage 31, communicates the second inlet and outlet 42 with the second passage 32, and communicates the third inlet and outlet 43 with the third passage 33. The first inlet 41, the second inlet 42 and the third inlet 43 may be connected to or share an external peristaltic pump, respectively, through which liquid is pumped into or discharged from the centrifugal chamber 11.

The cup bottom cover 3 is connected with a centrifugal power device, and the cup base 4 is fixed by an external locking device to limit rotation. The outer cup body 1, the inner cup body 2, the cup bottom cover 3 and the rotating shaft 5 are driven by a centrifugal power device to rotate at a high speed, and cell liquid in the centrifugal chamber 11 is centrifugally separated.

As shown in FIGS. 4 to 5, the apparatus for cell centrifugation according to the present embodiment is used for continuous concentration and washing treatment of a large volume of cell fluid. As shown in fig. 4a to 4b, the cell liquid to be treated is pumped into the centrifugal cup rotating at a high speed by a first peristaltic pump (not shown), the cell liquid to be treated flows into the centrifugal chamber 11 through the third inlet and outlet 43 and the third passage 33, and the air in the centrifugal chamber 11 is discharged through the first passage 31 and the first inlet and outlet 41. The centrifugal chamber 11 rotates at a high speed, cells and supernatant in the cell sap are gradually layered under the action of centrifugal force, and the cells are accumulated on the outer side of the centrifugal chamber 11, namely, close to the inner wall of the outer cup body 1; the supernatant is then inside the centrifuge chamber 11, i.e. close to the outer wall of the inner cup 2. As the cell liquid to be treated is continuously pumped in as shown in 4c of fig. 4, cells are distributed in the lower part of the centrifugal chamber 11 due to the conical shape of the centrifugal chamber 11; the supernatant is distributed at the upper portion of the centrifugal chamber 11, and part of the supernatant can be discharged into the external waste bag liquid through the first channel 31 and the first inlet and outlet 41.

According to the cell concentration of the cell liquid to be treated and the volume of the pumped cell liquid to be treated, the volume of the cells after current separation can be estimated; or the volume of the cells after the current separation is obtained through monitoring of a sensor. After the cells to be separated reach a certain volume as shown in 4d of fig. 4, a second peristaltic pump (not shown) discharges a certain amount of the separated cells through the second channel 32 and the second inlet/outlet 42.

Since centrifugal force is related to radius, the smaller the centrifugal force. As shown in fig. 4e, a certain amount of separated cells are discharged, so that the space occupation of the cell liquid to be treated, which is pumped in the centrifugal chamber 11 subsequently, can be reduced, and the cell liquid to be treated pumped in subsequently can be ensured to be subjected to a larger centrifugal force, and the centrifugal effect is better. As shown in fig. 4f, the cell liquid to be treated can be concentrated at the fastest speed until all the cell liquid to be treated is completely concentrated, and the whole concentration process is continuously carried out without being limited by the inherent volume of the centrifugal cup, so that the total amount of the cell liquid to be treated can be greatly increased; thus, the large-volume cell fluid can be concentrated continuously.

After completion of the concentration, as shown by 4g in fig. 4, the second peristaltic pump discharges the remaining separated cells through the second channel 32 and the second inlet and outlet 42, and the centrifugal chamber 11 is air-fed through the first channel 31 and the first inlet and outlet 41, preventing negative pressure resistance; as shown in fig. 4, 4h, the first peristaltic pump discharges the supernatant remaining in the centrifugal chamber 11 through the third channel 33 and the third inlet and outlet 43, and the centrifugal chamber 11 is introduced through the first channel 31 and the first inlet and outlet 41. The second peristaltic pump then pumps the collected isolated cells into the centrifuge chamber 11 in preparation for subsequent washing, as shown at 4k in fig. 4.

As shown in fig. 5a, the second peristaltic pump pumps washing liquid into the centrifugal cup rotating at a high speed through the second inlet and outlet 42 and the second channel 32 to wash the separated cells therein; the air in the centrifugal chamber 11 is discharged through the first passage 31 and the first inlet and outlet 41. In the washing process, as shown in fig. 5b, the washing liquid passes through the cell layer, reaches the upper part of the centrifugal chamber 11, and is discharged to the external waste liquid bag through the first channel 31 and the first inlet and outlet 41. The residual supernatant in the cell layer is continuously diluted by the washing liquid, so that the continuous washing effect is achieved. The second peristaltic pump is stopped after a predetermined period of time after the wash liquid is drained.

After washing is completed, as shown in fig. 5c-5d, the second peristaltic pump collects a portion of the washed cells through the second channel 32 and the second port 42 until the cell volume is less than the sensor detection location; the centrifugal chamber 11 is fed through the first channel 31 and the first inlet and outlet 41. As shown in fig. 5e-5f, the first peristaltic pump is started again to discharge the residual washing liquid through the third channel 33 and the third inlet and outlet 43, and the centrifugal chamber 11 continuously enters air through the first channel 31 and the first inlet and outlet 41; finally, as shown in 5g-5h of fig. 5, the second peristaltic pump collects the residual washed cells through the second channel 32 and the second inlet and outlet 42, thereby completing the whole continuous concentration washing process of the large-volume cell liquid.

As shown in fig. 6, the apparatus for cell centrifugation provided in this example was used to perform a process of concentrating and washing a small volume of cell fluid. As shown in fig. 6a-6b, the first peristaltic pump pumps the cells to be treated into the centrifugal chamber 11 in the centrifugal cup through the third inlet and outlet 43 and the third channel 33, and the air in the centrifugal chamber 11 is discharged through the first channel 31 and the first inlet and outlet 41; the cell liquid to be treated rotates at a high speed along with the centrifugal cup, cells and supernatant in the cell liquid are gradually layered under the action of centrifugal force, and the cells are accumulated on the outer side of the centrifugal chamber 11, namely, close to the inner wall of the outer cup body 1; the supernatant is then inside the centrifuge chamber 11, i.e. close to the outer wall of the inner cup 2. As shown in fig. 6c, as the cell liquid to be treated is continuously pumped in, the cells are distributed in the lower portion of the centrifugal chamber 11 due to the conical shape of the centrifugal chamber 11; the supernatant is distributed in the upper part of the centrifugal chamber 11, and a part of the supernatant is discharged into the external waste bag liquid through the first channel 31 and the first inlet and outlet 41.

As shown in fig. 6d to 6e, after the cell liquid to be treated is completely separated, the first peristaltic pump is operated in reverse direction to discharge the surplus supernatant in the centrifugal cup through the third channel 33 and the third inlet/outlet 43, and the centrifugal chamber 11 is continuously supplied with air through the first channel 31 and the first inlet/outlet 41. As shown at 6f in FIG. 6, only the separated cells and a small amount of supernatant remained in the centrifuge cup.

As shown in FIG. 6g, the second peristaltic pump is started to pump washing liquid into the centrifugal cup rotating at high speed through the second inlet and outlet 42 and the second channel 32, and the separated cells therein are washed. As shown in fig. 6h, during the washing, the washing liquid passes through the cell layer to the upper portion of the centrifugal chamber 11, and part of the washing liquid is discharged to the external waste liquid bag through the first passage 31 and the first inlet/outlet 41.

As shown in fig. 6, 6j, after washing is completed, the first peristaltic pump discharges the washing liquid remaining in the centrifugal cup through the third inlet and outlet 43 and the third channel 33, and the centrifugal chamber 11 continuously receives air through the first channel 31 and the first inlet and outlet 41; as shown at 6k in FIG. 6, only washed cells remained until inside the centrifuge cup. As shown in fig. 6m-6n, the second peristaltic pump then collects the remaining washed cells through the second channel 32 and the second inlet/outlet 42, completing the whole process of concentrating and washing the small volume of cell fluid.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Claims (10)

1. A device for centrifugal separation of cells, which is characterized by comprising an outer cup body, an inner cup body and a cup bottom cover; the inner cup body is arranged in the outer cup body, an interlayer is arranged between the inner wall of the outer cup body and the outer wall of the inner cup body, the cup bottom cover is arranged at the bottom of the outer cup body, and the cup bottom cover is matched with the interlayer to form a centrifugal chamber; the centrifugal chamber includes a first channel, a second channel, and a third channel; the first channel is arranged at the upper part of the centrifugal chamber, and the second channel and the third channel are arranged at the lower part of the centrifugal chamber; the second channel is close to the inner wall of the outer cup body, and the third channel is close to the outer wall of the inner cup body.

2. The apparatus for centrifugal separation of cells according to claim 1, wherein a rotation shaft is provided on the outer cup; the rotating shaft is rotatably supported with a cup seat through a bearing.

3. The apparatus for centrifugal separation of cells according to claim 2, wherein the cup holder is provided with an axial deep groove, an open end of which is provided with a bearing groove, and the bearing is provided in the bearing groove.

4. The apparatus for centrifugal separation of cells according to claim 3, wherein the rotation shaft is disposed in the axial deep groove with an annular gap therebetween.

5. The apparatus for centrifugal separation of cells according to claim 4, wherein the cup holder is provided with a first inlet, a second inlet and a third inlet; the first, second and third ports are in fluid communication with the annular gap.

6. The device for centrifugal separation of cells according to claim 5, wherein a plurality of sealing ring fixing rings and a plurality of groups of sealing rings are sequentially arranged in the axial center deep groove at intervals; and sealing and isolating the annular gaps through the plurality of groups of sealing rings, wherein the plurality of annular sealing gaps are respectively in fluid communication with the first inlet and outlet, the second inlet and outlet and the third inlet and outlet.

7. The apparatus for centrifugal separation of cells according to claim 6, wherein a plurality of fluid passages are provided inside the rotation shaft; the plurality of fluid passages communicate the first inlet and the first passage, the second inlet and the second passage, and the third inlet and the third passage, respectively.

8. The apparatus according to claim 7, wherein the first, second and third inlets are externally connectable to or commonly used with external peristaltic pumps, respectively.

9. The apparatus for centrifugal separation of cells according to claim 1, wherein the outer and inner cups are cylindrical and/or conical.

10. The apparatus for centrifugal separation of cells according to claim 3, wherein the cup bottom cover is connected to a centrifugal power device, the cup holder is fixed by an external locking device, and the outer cup, the inner cup, the cup bottom cover and the rotating shaft are rotated at a high speed by the centrifugal power device.