Centrifugal blood separation device

Abstract

The utility model relates to the technical field of medical instruments, and discloses a centrifugal blood separation device which comprises a positioning plate, an upper cover, a plurality of test tube racks, a rotary table and a lower cover, the lower cover is installed at the bottom of the rotary table through bolts, the lower cover and the rotary table form a plurality of movable cavities, and the movable cavities are symmetrically arranged along the edge of the rotary table. The bottoms of the multiple movable cavities incline from the center of the lower cover to the edge, the multiple test tube racks are installed in the multiple movable cavities in a swinging mode, the upper cover is installed on the top of the rotating disc through bolts, the multiple test tube racks are limited on the upper cover, and the positioning plate is installed on the upper cover through bolts. The blood centrifugal tube does not need to be obliquely arranged in advance, the blood centrifugal tube is in an inclined state under centrifugal rotation, separation of samples in the blood centrifugal tube is facilitated, the movable cavity can prevent the blood centrifugal tube from generating heat due to friction with air, and therefore the centrifugal rotating speed is increased; in a static state, the blood centrifuge tube automatically recovers to a vertical state under the action of gravity, so that a user can conveniently take out the blood centrifuge tube.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a centrifugal blood separation device. Background Art

[0002] The blood component separator is a medical device that separates, removes and collects multiple blood components from the donor / patient through gravity centrifugation. It consists of a centrifuge, a blood pump, a pressurized cuff, a weighing assembly, a display screen and a control system. The blood component separator uses an automated, digital extrusion device to transfer the different components of the centrifuged blood, such as plasma, platelets, and buffy coat, into a special storage bag, and then heat-seals or clips them to the corresponding pipelines according to the instructions, so as to achieve the purpose of component transfer packaging.

[0003] In order to prevent the sample in the test tube from escaping from the blood centrifuge tube during centrifugation, the centrifuges currently on the market need to tilt the blood centrifuge tube in advance (i.e., the blood centrifuge tube mouth faces the center upper end of the separation device, and the bottom of the test tube faces the outer lower end), which is inconvenient for users to operate.

[0004] Currently, there are many types of blood separation devices for blood separation on the market. However, the number, position and size of the slots for placing blood centrifuge tubes in the blood separation devices are fixed. During the centrifugation operation, medical staff selectively place multiple matching blood centrifuge tubes in the corresponding slots of the blood separation device. For the centrifugation of blood separation tubes of different specifications and sizes (including outer diameter and length), blood separation devices of different specifications are required. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the above prior art and provide a centrifugal blood separation device.

[0006] The purpose of the utility model is achieved through the following technical solutions: a centrifugal blood separation device comprises a positioning plate, an upper cover, a plurality of test tube racks, a turntable and a lower cover, the lower cover is mounted on the bottom of the turntable by bolts, the lower cover and the turntable form a plurality of active cavities, the plurality of active cavities are symmetrically arranged along the edge of the turntable, the bottoms of the plurality of active cavities are inclined toward the edge from the center of the lower cover, the plurality of test tube racks are swingably mounted on the plurality of active cavities, there is a gap between the bottoms of the plurality of test tube racks and the bottoms of the plurality of active cavities, the upper cover is mounted on the top of the turntable by bolts, the plurality of test tube racks are limited to the upper cover, and the positioning plate is mounted on the upper cover by bolts.

[0007] A better choice, the turntable includes a boss, a central cylinder, a protective shell, a plurality of herringbone partitions and a central column, the inner wall of the protective shell is connected to the outer wall of the central cylinder through the plurality of herringbone partitions, the plurality of herringbone partitions, the protective shell and the lower cover form a plurality of active cavities, the tops of the plurality of active cavities are provided with tube rack entrances, both sides of the tube rack entrances are provided with limiting grooves, the upper end of the test tube rack is swingably mounted on the limiting grooves, the lower end of the test tube rack is suspended in the active cavity, a boss is provided at the top center of the protective shell, the boss is embedded in the upper cover, the bottom center of the protective shell is connected to the central column, and the central column is connected to the boss.

[0008] A more preferred option is that isolation grooves are provided between the plurality of herringbone partitions.

[0009] A better choice is that the test tube rack includes a tube sleeve and a positioning column, the positioning column is symmetrically arranged on the outer wall of the tube sleeve, the positioning column is rotatably installed on the turntable, the positioning column is limited to the upper cover, the tube sleeve is suspended in the movable cavity, there is a gap between the bottom of the tube sleeve and the lower cover, and the tube sleeve is provided with a tube hole.

[0010] A better choice is that the lower cover includes a central circular plate and an arc edge portion, the arc edge portion is connected to the edge of the central circular plate, a column hole is provided in the middle of the central circular plate, the turntable is embedded in the column hole, and there is a gap between the central circular plate and the bottom of the test tube rack.

[0011] A better choice is that the upper cover is provided with multiple test tube inlets, positioning grooves and a first center hole, the positioning groove is located at the bottom of the upper cover, the first center hole is located at the center of the positioning groove, the multiple test tube inlets are symmetrically arranged along the outer circumference of the positioning groove, and the center hole, the positioning groove and the multiple test tube inlets all correspond to the turntable.

[0012] A better choice is that the test tube rack is made of stainless steel.

[0013] A better choice is that the turntable is made of stainless steel.

[0014] A better choice is that the lower cover is made of stainless steel.

[0015] A better choice is that the upper cover is made of stainless steel.

[0016] The utility model has the following advantages and beneficial effects compared with the prior art:

[0017] The utility model uses a positioning plate, an upper cover, a plurality of test tube racks, a turntable and a lower cover, and there is no need to tilt the blood centrifuge tube in advance. During centrifugal rotation, the blood centrifuge tube is in a tilted state, which is conducive to the separation of samples in the blood centrifuge tube. The movable cavity can prevent the blood centrifuge tube from generating heat due to friction with the air, thereby increasing the centrifugal speed. In a stationary state, the vertical state is automatically restored under the action of gravity, which is convenient for users to take out the blood centrifuge tube. By replacing test tube racks of different specifications, blood centrifuge tubes of different specifications can be used. The utility model has a simple structure and strong flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a centrifugal blood separation device of the utility model;

[0019] Figure 2 It is an explosion schematic diagram of a centrifugal blood separation device of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of a centrifugal blood separation device of the utility model;

[0021] Figure 4 It is a schematic diagram of a turntable of a centrifugal blood separation device of the utility model;

[0022] Figure 5 It is a schematic diagram of a turntable of a centrifugal blood separation device of the utility model;

[0023] Figure 6 It is a schematic diagram of the lower cover of a centrifugal blood separation device of the utility model;

[0024] Figure 7 This is a schematic diagram of an upper cover of a centrifugal blood separation device of the utility model;

[0025] Figure 8 It is a schematic diagram of a test tube rack of a centrifugal blood separation device of the utility model;

[0026] Markings of the components in the accompanying drawings: 1-positioning plate; 2-upper cover; 201-test tube entrance; 202-first center hole; 3-test tube rack; 301-tube sleeve; 302-tube hole; 303-positioning column; 4-turntable; 401-tube rack entrance; 402-limiting groove; 403-boss; 404-second center hole; 405-protective shell; 406-herringbone partition; 407-movable cavity; 408-center column; 409-isolation groove; 410-center cylinder; 5-lower cover; 501-arc edge; 502-center circular plate; 503-column hole; 6-blood centrifuge tube. DETAILED DESCRIPTION

[0027] The utility model object of the utility model is further described in detail below in conjunction with the drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation method of the utility model is not limited to the following embodiments.

[0028] like Figure 1-3 As shown, a centrifugal blood separation device includes a positioning plate 1, an upper cover 2, 16 test tube racks 3, a turntable 4 and a lower cover 5. The lower cover 5 is installed at the bottom of the turntable 4 by bolts. The lower cover 5 and the turntable 4 form 16 active chambers 407. The 16 active chambers 407 are distributed along the edge of the turntable 4. The 16 active chambers 407 are evenly and symmetrically arranged. The bottoms of the 16 active chambers 407 are inclined from the center of the lower cover 5 to the edge. The 16 test tube racks 3 are respectively swingably installed in the inner cavity of the 16 active chambers 407. There is a gap between the bottom of the 16 test tube racks 3 and the bottom of the 16 active chambers 407, so that the bottom of the active chamber 407 does not affect the outward swing of the test tube rack 3 under the centrifugal action. The middle part of the top of the turntable 4 is embedded in the bottom of the upper cover 2, which can prevent the upper cover 2 and the turntable 4 from rotating relative to each other. The upper cover 2 is also fixedly connected to the top of the turntable 4 by bolts. The bottom of the upper cover 2 covers the positioning posts 303 of the test tube rack 3 to prevent the test tube rack 3 from being separated from the turntable 4 during centrifugal rotation. The positioning plate 1 is mounted on the top of the upper cover 2 by bolts.

[0029] The positioning plate 1 is made of stainless steel and is used to install the centrifugal blood separation device on the centrifuge, so that the centrifuge can drive the centrifugal blood separation device to rotate. The upper cover 2 is made of stainless steel and is used to prevent the test tube rack 3 from detaching from the turntable 4 during centrifugal rotation. The test tube rack 3 is made of stainless steel and is used to tightly cover the blood centrifuge tube 6 so that the blood centrifuge tube 6 can swing inside and outside. The turntable 4 is made of stainless steel and is used to evenly arrange the blood centrifuge tube 6 so that the blood centrifuge tube 6 is subjected to symmetrical centrifugal force. The lower cover 5 is made of stainless steel, which can prevent the blood centrifuge tube 6 from detaching from the active chamber 407 during centrifugal rotation, thereby playing a protective role.

[0030] The use process of the centrifugal blood separation device is as follows: 16 blood centrifuge tubes 6 are respectively embedded into 16 test tube racks 3, and then the 16 test tube racks 3 are placed into the turntable 4. The test tube racks 3 can swing inside and outside the turntable 4. The upper cover 2 is covered on the top of the turntable 4, and the boss 403 of the turntable 4 is embedded in the positioning groove in the upper cover 2. Then the upper cover 2 is connected to the top of the turntable 4 with bolts. The upper cover 2 covers the limiting groove 402 on the top of the turntable 4 to prevent the test tube rack 3 from detaching from the turntable 4. Then the positioning plate 1 is installed on the top of the upper cover 2 by bolts. Then the entire centrifugal blood separation device is installed on the centrifuge and fixed.

[0031] Principle of centrifugal blood separation device: In order to increase the centrifugal speed of the blood centrifuge tube 6, the radius of the blood separation device is increased or the rotation speed of the blood separation device is increased in the prior art. Increasing the radius of the blood centrifuge device will make the device very large and increase the manufacturing cost, while increasing the rotation speed of the blood separation device will cause the blood centrifuge tube 6 to rub against the air and generate heat. When the centrifugal rotation speed of the blood centrifuge tube 6 of the existing blood separation device is about 10000r / min, the blood centrifuge tube 6 will rub against the air to generate heat, affecting the quality of the sample, and thus the centrifugal rotation speed of the blood centrifuge tube 6 cannot be increased. When the centrifugal blood separation device of this embodiment is centrifugally rotated, the active cavity isolates the blood centrifuge tube 6 from the external air to prevent the air from rubbing against the blood centrifuge tube 6 and causing the blood centrifuge tube 6 to heat up, thereby increasing the rotation speed of the centrifugal blood separation device and realizing the centrifugal rotation speed of the blood centrifuge tube 6. When the blood centrifuge tube 6 is centrifugally rotated, the blood centrifuge tube is in an inclined state, which is helpful for the separation of the sample in the blood centrifuge tube; and when the blood centrifuge tube 6 is stationary, it automatically restores the vertical state under the action of gravity, which is convenient for the user to take out the blood centrifuge tube 6 and also convenient for automation.

[0032] like Figure 4 and 5 As shown, the turntable 4 includes a boss cylinder 403, a protective shell 405, 16 herringbone partitions 406, a central column 408 and a central cylinder 410. The outer ends of the 16 herringbone partitions 406 are connected to the inner wall of the protective shell 405, and the inner ends of the 16 herringbone partitions 406 are connected to the outer wall of the central cylinder 410. The 16 herringbone partitions 406 are evenly distributed on the inner wall of the protective shell 405. There is an isolation groove 409 between two adjacent herringbone partitions 406. The 16 herringbone partitions 406, the protective shell 405 and the lower cover 5 form 16 active cavities 407. The tops of the 16 active cavities 407 are all provided with a tube rack entrance 401, and two limiting grooves 402 are provided on both sides of the tube rack entrance 401, and the two limiting grooves 402 are symmetrically arranged. The upper end of the test tube rack 3 is swingably installed in the limiting groove 402, and the lower end of the test tube rack 3 is suspended in the active cavity 407. A boss 403 is provided on the top of the protective shell 405, and the boss 403 is used to be embedded in the upper cover 2 to prevent the turntable 4 from rotating relative to the upper cover 2. A central column 408 is provided at the bottom of the protective shell 405, and the central column 408 is located below the boss 403. The through hole of the boss 403 is connected to the second central hole 404 of the central column 408.

[0033] like Figure 6As shown, the lower cover 5 includes a central circular plate 502 and an arc edge portion 501, the inner edge of the arc edge portion 501 is connected to the outer edge of the central circular plate 502, a column hole 503 is provided in the middle of the central circular plate 502, the bottom of the central column 408 of the turntable 4 is embedded in the column hole 503, and there is a gap between the central circular plate 502 and the bottom of the test tube rack 3. The arc edge portion 501 is inclined downward in an arc shape from the inner edge to the outer edge.

[0034] like Figure 7 As shown, the upper cover 2 is provided with 16 test tube inlets 201, a positioning groove and a first center hole 202. The positioning groove is located at the bottom of the upper cover 2, and the boss on the top of the turntable 4 can be embedded in the positioning groove. The first center hole 202 is located at the center of the positioning groove, and the first center hole 202 corresponds to the second center hole 404 of the boss 403 of the turntable 4. The 16 test tube inlets 201 are symmetrically arranged along the outer periphery of the positioning groove, and the 16 test tube inlets 201 correspond to the 16 tube rack inlets 401 respectively.

[0035] like Figure 8 As shown, the test tube rack 3 includes a tube sleeve 301 and two positioning posts 303, and the two positioning posts 303 are symmetrically arranged on the upper outer wall of the tube sleeve 301. The two positioning posts 303 are rotatably installed in the limiting groove 402 of the turntable 4, and the two positioning posts 303 are limited at the bottom of the upper cover 2 to prevent the positioning posts 303 from being separated from the limiting groove 402. The tube sleeve 301 is suspended in the movable cavity 407, and there is a gap between the bottom of the tube sleeve 301 and the lower cover 5 to prevent the lower cover 5 from hindering the tube sleeve 301 from swinging in and out. The center of the tube sleeve 301 is provided with a tube hole 302 for placing the blood centrifuge tube 6.

[0036] The above-mentioned specific implementation modes are preferred embodiments of the present invention and cannot be used to limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A centrifugal blood separation device, characterized in that: It includes a positioning plate, an upper cover, a plurality of test tube racks, a turntable and a lower cover, wherein the lower cover is mounted on the bottom of the turntable by bolts, the lower cover and the turntable form a plurality of movable cavities, the plurality of movable cavities are symmetrically arranged along the edge of the turntable, the bottoms of the plurality of movable cavities are inclined toward the edge from the center of the lower cover, the plurality of test tube racks are swingably mounted on the plurality of movable cavities, there is a gap between the bottoms of the plurality of test tube racks and the bottoms of the plurality of movable cavities, the upper cover is mounted on the top of the turntable by bolts, the plurality of test tube racks are limited to the upper cover, and the positioning plate is mounted on the upper cover by bolts.

2. A centrifugal blood separation device according to claim 1, characterized in that: The turntable includes a boss, a central cylinder, a protective shell, a plurality of herringbone partitions and a central column. The inner wall of the protective shell is connected to the outer wall of the central cylinder through the plurality of herringbone partitions. The plurality of herringbone partitions, the protective shell and the lower cover form a plurality of active cavities. The tops of the plurality of active cavities are provided with tube rack entrances, and both sides of the tube rack entrances are provided with limiting grooves. The upper end of the test tube rack is swingably mounted on the limiting grooves, and the lower end of the test tube rack is suspended in the active cavity. A boss is provided at the top center of the protective shell, and the boss is embedded in the upper cover. The bottom center of the protective shell is connected to the central column, and the central column is communicated with the boss.

3. A centrifugal blood separation device according to claim 2, characterized in that: Isolation grooves are provided between the plurality of herringbone partitions.

4. The centrifugal blood separation device according to claim 1, characterized in that: The test tube rack includes a tube sleeve and a positioning column, wherein the positioning column is symmetrically arranged on the outer wall of the tube sleeve, the positioning column is rotatably installed on the turntable, the positioning column is limited to the upper cover, the tube sleeve is suspended in the movable cavity, there is a gap between the bottom of the tube sleeve and the lower cover, and the tube sleeve is provided with a tube hole.

5. The centrifugal blood separation device according to claim 1, characterized in that: The lower cover includes a central circular plate and an arc edge portion, the arc edge portion is connected to the edge of the central circular plate, a column hole is provided in the middle of the central circular plate, the turntable is embedded in the column hole, and there is a gap between the central circular plate and the bottom of the test tube rack.

6. The centrifugal blood separation device according to claim 1, characterized in that: The upper cover is provided with a plurality of test tube inlets, a positioning groove and a first center hole, the positioning groove is located at the bottom of the upper cover, the first center hole is located at the center of the positioning groove, the plurality of test tube inlets are symmetrically arranged along the outer circumference of the positioning groove, and the center hole, the positioning groove and the plurality of test tube inlets all correspond to the turntable.

7. The centrifugal blood separation device according to claim 1, characterized in that: The test tube rack is made of stainless steel.

8. The centrifugal blood separation device according to claim 1, characterized in that: The turntable is made of stainless steel.

9. The centrifugal blood separation device according to claim 1, characterized in that: The lower cover is made of stainless steel.

10. The centrifugal blood separation device according to claim 1, characterized in that: The upper cover is made of stainless steel.

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