A livestock and poultry blood separation device and method

By designing an automated livestock and poultry blood separation device, using a linear actuator, an electric telescopic rod and a liquid suction device, the automatic inhalation of blood, centrifugal separation and automatic extrusion of separation components are achieved, solving the problem of manual operation in the prior art, and improving the separation efficiency and effect.

CN116371017BActive Publication Date: 2025-05-02HEFEI UNIV OF TECH
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Patent Information

Application Number
CN202310354309.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-06
Publication Date
2025-05-02
Estimated Expiration
2043-04-06

AI Technical Summary

Technical Problem

The prior art requires manual operation during the separation of livestock and poultry blood, resulting in labor-intensive and inefficient in large-scale processing.

Method used

An automated livestock and poultry blood separation device is designed, using multiple parallel linear actuators, electric telescopic rods and liquid suction devices to realize automatic inhalation of blood, centrifugal separation and automatic extrusion of separation components.

Benefits of technology

It realizes automatic processing of blood separation, improves efficiency, reduces the time and labor of manual operation, and ensures that the separation of red blood cells, platelets, white blood cells and plasma is good and not easy to mix.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the technical field of blood separation, and to a blood separation device and method for livestock and poultry, comprising a plurality of linear actuators, a first electric telescopic rod connected below the linear actuator, a mounting frame connected below the first electric telescopic rod, a second electric telescopic rod provided at the top of the mounting frame, a movable plate connected below the second electric telescopic rod, a plurality of groups of liquid suction devices provided on the bottom of the movable plate, the liquid suction device comprising a sleeve block, a rotatable round block provided inside the sleeve block, a pull rod fixedly connected below the round block, a piston provided at the bottom of the pull rod, a hollow cylinder matched with the piston, a first bearing sleeved on the hollow cylinder, the first bearing installed at the bottom of the mounting frame, a cylinder head provided at the bottom of the hollow cylinder; a gear sleeved on the hollow cylinder, a transmission wheel meshed with the gear, a motor connected to the transmission wheel; a blood pool correspondingly provided below the liquid suction device, a red blood cell pool, a platelet and white blood cell pool, and a plasma pool provided on one side of the blood pool in sequence. The present invention can achieve blood separation better.
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Description

Technical Field

[0001] The present invention relates to the technical field of blood separation, and in particular to a device and method for separating blood from livestock and poultry. Background Art

[0002] Livestock and poultry blood is one of the main by-products after animal slaughter, accounting for 6% to 8% of the carcass. According to incomplete statistics, nearly 100 million tons of blood are produced by livestock and poultry slaughter in my country each year. Livestock and poultry blood has high nutritional value, with a protein content of 17% to 22%, and a protein content of more than 90% in blood dry matter. 60% to 65% of it is hemoglobin. It also contains a large amount of heme iron, vitamins, minerals, hormones, enzymes, antibodies and other active substances. It is known as "liquid meat". For a long time, due to the scattered slaughtering and backward technology, only about 25% of livestock and poultry blood has been collected and utilized, and most of it has been discharged as waste. Not only has it not been well processed and utilized, but it has also brought hidden dangers of environmental pollution.

[0003] Livestock and poultry blood consists of plasma and blood cells. Blood cells are divided into three categories: red blood cells, white blood cells, and platelets. The centrifugation method is often used to separate livestock and poultry blood. The centrifugation method is to spin the livestock and poultry blood at high speed for a period of time and let it stand. The top transparent liquid in the container is plasma, the middle is white blood cells and platelets, and the bottom is red blood cells.

[0004] At present, centrifuges are commonly used for blood separation of livestock and poultry. However, when livestock and poultry blood is put into or taken out of the centrifuge, it is often necessary to do it manually. This is very laborious in large-scale livestock and poultry blood separation processing. Summary of the invention

[0005] The present invention provides a livestock and poultry blood separation device and method, which can automatically suck blood for separation and automatically squeeze out the separated blood components.

[0006] A livestock and poultry blood separation device according to the present invention comprises a plurality of linear actuators arranged in parallel, wherein a first electric telescopic rod capable of extending upward and downward is connected to the bottom of any linear actuator, a mounting frame is connected to the bottom of the first electric telescopic rod, a second electric telescopic rod capable of extending upward and downward is arranged at the top of the mounting frame, a movable plate is connected to the bottom of the second electric telescopic rod, a plurality of groups of liquid suction devices are arranged on the bottom surface of the movable plate, the liquid suction device comprises a sleeve block, the sleeve block is fixedly mounted on the bottom surface of the movable plate, a rotatable round block is arranged in the sleeve block, a pull rod is fixedly connected to the bottom of the round block, a piston is arranged at the bottom end of the pull rod, the piston is matched with an empty cylinder, a first bearing is sleeved on the empty cylinder, the first bearing is mounted at the bottom of the mounting frame, and a cylinder head is arranged at the bottom end of the empty cylinder;

[0007] Gears are sleeved on the empty cylinders, and the gears between adjacent empty cylinders of the same group of liquid suction devices are meshed. The corresponding two gears of the two groups of liquid suction devices are meshed with transmission wheels at the same time, and the transmission wheels are connected to motors, which are installed at the bottom of the installation frame;

[0008] A blood pool is arranged correspondingly below the liquid aspiration device, and a red blood cell pool, a platelet and white blood cell pool, and a plasma pool are arranged in sequence on one side of the blood pool.

[0009] Preferably, a sleeve cavity is provided in the sleeve block, a through hole is provided below the sleeve cavity, the round block is located in the sleeve cavity, and the pull rod passes through the through hole.

[0010] Preferably, a plurality of balls are respectively disposed on the top surface and the bottom surface of the round block, and the balls are attached to the inner wall of the sleeve cavity.

[0011] Preferably, the sleeve block comprises an upper part and a lower part, the upper part is fixedly connected to the bottom surface of the movable plate, and the lower part is detachably connected to the upper part.

[0012] Preferably, a support platform is provided between the blood pool and the red blood cell pool, a plurality of second bearings are fixedly mounted on the support platform, and a rubber block is fixedly provided on the inner ring of the second bearing, and the rubber block can block the barrel head.

[0013] Preferably, the linear actuator includes a body, an installation cavity is provided in the body, a screw is provided in the installation cavity, a screw nut is sleeved on the screw, and the screw nut is connected to a connecting block; a limiting hole is provided on one side of the installation cavity, and the connecting block is connected to the first electric telescopic rod after passing through the limiting hole; a servo motor is provided at one end of the body.

[0014] Preferably, the connecting block is connected to a mounting plate after passing through the limiting hole, and the first electric telescopic rod is mounted on the mounting plate.

[0015] The present invention provides a method for separating blood from livestock and poultry, which uses the above-mentioned livestock and poultry blood separation device and comprises the following steps:

[0016] 1. Move the aspiration device to the top of the blood pool by a linear actuator;

[0017] Second, the first electric telescopic rod is extended to allow the tube head on the liquid aspiration device to enter the blood in the blood pool;

[0018] 3. By shortening the second electric telescopic rod, the piston is raised to suck the blood into the empty cylinder;

[0019] 4. Shorten the first electric telescopic rod to return the barrel head to its original height;

[0020] 5. The transmission wheel is driven by the motor to rotate, and the transmission wheel drives the gears on the two sets of liquid aspiration devices to rotate, so that the empty cylinder rotates for centrifugal separation. After rotating for a period of time, it is left to stand until the blood is stratified;

[0021] 6. Move the liquid suction device to the top of the red blood cell pool by the linear actuator, and extend the second electric telescopic rod to squeeze out the red blood cell layer at the bottom of the empty tube and drop it into the red blood cell pool;

[0022] 7. Move the liquid aspiration device to the top of the platelet and leukocyte pool by the linear actuator, and extend the second electric telescopic rod to squeeze out the platelet and leukocyte layer in the empty tube and drop them into the platelet and leukocyte pool;

[0023] 8. Move the liquid aspirating device to the top of the plasma pool by means of a linear actuator, and extend the second electric telescopic rod to squeeze out the plasma layer in the empty tube and drop it into the plasma pool;

[0024] 9. Reset the aspiration device by the linear actuator and perform circulating blood separation operation.

[0025] Preferably, in step five, before centrifugal separation, the liquid aspiration device is moved above the support table by a linear actuator; then, the first electric telescopic rod is extended to squeeze the barrel head onto the rubber block; then, centrifugal separation is performed by a motor; and after standing and stratification, the barrel head is returned to its original height by shortening the first electric telescopic rod.

[0026] The present invention can automatically cycle through the operations of sucking blood, centrifuging and squeezing blood, which is very convenient and efficient, and is suitable for large-scale automated processing of blood separation; automatic liquid suction replaces manual addition, which saves time and labor, and the method of squeezing out layered blood in sequence makes it possible to obtain red blood cells, platelets, white blood cells and plasma with good results, without mixing easily and with high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a livestock and poultry blood separation device in the embodiment;

[0028] Figure 2 This is a schematic diagram of the main structure of a livestock and poultry blood separation device in the embodiment;

[0029] Figure 3 It is a structural schematic diagram of the liquid suction device in the embodiment;

[0030] Figure 4 It is a structural schematic diagram of the set block in the embodiment;

[0031] Figure 5 A schematic diagram of a top view of the support platform in the embodiment;

[0032] Figure 6 Schematic diagram of the structure of the linear actuator in the embodiment. DETAILED DESCRIPTION

[0033] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0034] Example

[0035] like Figure 1-6 As shown, this embodiment provides a livestock and poultry blood separation device, which includes a plurality of linear actuators 110 arranged in parallel, and a first electric telescopic rod 120 that can be extended and retracted up and down is connected to the bottom of any linear actuator 110, and a mounting frame 130 is connected to the bottom of the first electric telescopic rod 120, and a second electric telescopic rod 140 that can be extended and retracted up and down is provided at the top of the inside of the mounting frame 130, and a movable plate 150 is connected to the bottom of the second electric telescopic rod 140, and a plurality of groups of liquid suction devices are provided on the bottom surface of the movable plate 150, and the liquid suction device includes a sleeve block 160, and the sleeve block 160 is fixedly mounted on the bottom surface of the movable plate 150, and a rotatable round block 170 is provided in the sleeve block 160, and a pull rod 180 is fixedly connected to the bottom of the round block 170, and a piston 190 is provided at the bottom end of the pull rod 180, and the piston 190 is matched with an empty cylinder 200, and a first bearing 210 is sleeved on the empty cylinder 200, and the first bearing 210 is installed at the bottom of the mounting frame 130, and a cylinder head 220 is provided at the bottom end of the empty cylinder 200;

[0036] The empty cylinder 200 is sleeved with a gear 230, and the gears 230 between adjacent empty cylinders 200 of the same group of liquid suction devices are meshed, and the corresponding two gears 230 of the two groups of liquid suction devices are meshed with a transmission wheel 240 at the same time, and the transmission wheel 240 is connected to a motor 250, and the motor 250 is installed at the bottom of the installation frame 130;

[0037] A blood pool 260 is correspondingly arranged below the liquid aspiration device, and a red blood cell pool 270, a platelet and white blood cell pool 280, and a plasma pool 290 are arranged in sequence on one side of the blood pool 260.

[0038] The movement of the linear actuator 110 can drive the liquid suction device to the corresponding blood pool 260, red blood cell pool 270, platelet and white blood cell pool 280, and plasma pool 290 to perform liquid suction and liquid squeezing operations. The first electric telescopic rod 120 can be raised and lowered, so that the liquid suction device can be moved up and down, so that the barrel head 220 on the liquid suction device can be inserted into the blood for suction, and the barrel head 220 can leave the blood after the suction is completed. The second electric telescopic rod 140 can be raised and lowered, so that the pull rod 180 can be driven to move up and down. The structure of the pull rod 180, piston 190, empty barrel 200, and barrel head 220 is similar to that of a syringe. When the pull rod 180 moves upward, the blood is sucked by atmospheric pressure, and when the pull rod 180 moves downward, the blood can be squeezed out. The empty cylinder 200 is installed at the bottom of the mounting frame 130 through the first bearing 210. In this way, the empty cylinder 200 cannot move up and down but can only rotate. The motor 250 drives the transmission wheel 240 to rotate, so that the gears 230 of the two groups of liquid aspiration devices rotate. In this way, the rotation of the empty cylinder 200 is realized, thereby realizing the centrifugal separation of blood. In this embodiment, only one motor 250 is needed to drive the corresponding two gears 230 of the two groups of liquid aspiration devices to rotate through the transmission wheel 240, so that all the empty cylinders 200 on the two groups of liquid aspiration devices can be rotated, which is very convenient. The linear actuator 110 has multiple ( Figure 1 There are two in the figure), and one linear actuator 110 also corresponds to multiple sets of liquid suction devices ( Figure 1 There are two groups in the figure), one group of liquid suction devices corresponds to a plurality of empty cylinders 200 ( Figure 1 In this way, the blood separation operation can be performed back and forth through multiple empty cylinders 200, which is very convenient.

[0039] The device can automatically cycle through the operations of sucking blood, centrifuging and squeezing blood, which is very convenient and efficient, and is suitable for large-scale automated processing of blood separation; automatic liquid suction replaces manual addition, saving time and labor, and the method of squeezing out layered blood in sequence makes the removal of red blood cells, platelets, white blood cells and plasma better, less likely to mix, and faster.

[0040] A sleeve cavity 161 is provided in the sleeve block 160 , a through hole 162 is provided below the sleeve cavity 161 , the round block 170 is located in the sleeve cavity 161 , and the pull rod 180 passes through the through hole 162 .

[0041] The round block 170 can rotate in the sleeve cavity 161, so that when the empty cylinder 200 rotates for centrifugal separation, the round block 170 rotates accordingly, so that the sleeve block 160 will not hinder the round block 170. In addition, the sleeve cavity 161 clamps the top and bottom surfaces of the round block 170, so that when the sleeve block 160 rises and falls with the movable plate 150, it can drive the round block 170 to move up and down, realizing the up and down movement of the pull rod 180.

[0042] A plurality of balls 171 are respectively disposed on the top and bottom surfaces of the round block 170 , and the balls 171 are attached to the inner wall of the sleeve cavity 161 .

[0043] The provision of the ball 171 makes the rotation of the round block 170 more stable.

[0044] The sleeve block 160 includes an upper portion 1601 and a lower portion 1602 . The upper portion 1601 is fixedly connected to the bottom surface of the movable plate 150 , and the lower portion 1602 is detachably connected to the upper portion 1601 .

[0045] The lower part 1602 is detachably connected to the upper part 1601, so it is easy to install.

[0046] A support platform 300 is provided between the blood pool 260 and the red blood cell pool 270 . A plurality of second bearings 310 are fixedly mounted on the support platform 300 . A rubber block 320 is fixedly provided on the inner ring of the second bearing 310 . The rubber block 320 can block the barrel head 220 .

[0047] The rubber block 320 on the inner ring of the second bearing 310 on the support platform 300 can rotate, so that when the barrel head 220 descends and presses against the rubber block 320, the rubber block 320 will not hinder the rotation of the barrel head 220. Moreover, after the rubber block 320 blocks the barrel head 220, the possibility of leakage is avoided during centrifugal separation (generally, there will be no leakage if it is not blocked, and this is done to ensure that there is no risk of error).

[0048] The linear actuator 110 includes a body 111, a mounting cavity 112 is provided in the body 111, a screw rod 113 is provided in the mounting cavity 112, a screw rod nut 114 is sleeved on the screw rod 113, and the screw rod nut 114 is connected to a connecting block 115; a limiting hole 116 is provided on one side of the mounting cavity 112, and the connecting block 115 is connected to the first electric telescopic rod 120 after passing through the limiting hole 116; a servo motor 117 is provided at one end of the body 111.

[0049] The linear actuator 110 is a common mechanical structure, which can stably drive the first electric telescopic rod 120 to perform linear motion.

[0050] The connecting block 115 is connected to a mounting plate 121 after passing through the limiting hole 116 , and the first electric telescopic rod 120 is mounted on the mounting plate 121 .

[0051] The installation of the mounting plate 121 facilitates the installation of the first electric telescopic rod 120 .

[0052] This embodiment provides a method for separating blood from livestock and poultry, which uses the above-mentioned livestock and poultry blood separation device and includes the following steps:

[0053] 1. Move the liquid suction device to above the blood pool 260 by the linear actuator 110;

[0054] Second, the first electric telescopic rod 120 is extended to allow the barrel head 220 on the liquid aspiration device to enter the blood in the blood pool 260;

[0055] 3. The second electric telescopic rod 140 is shortened to raise the piston 190 and suck the blood into the empty cylinder 200;

[0056] Fourth, shortening the first electric telescopic rod 120 to return the barrel head 220 to its original height;

[0057] 5. The motor 250 drives the transmission wheel 240 to rotate, and the transmission wheel 240 drives the gears 230 on the two sets of liquid aspiration devices to rotate, so that the empty cylinder 200 rotates to perform centrifugal separation. After rotating for a period of time, it is left to stand until the blood is stratified;

[0058] 6. Move the liquid suction device to the top of the red blood cell pool 270 by the linear actuator 110, and extend the second electric telescopic rod 140 to squeeze out the red blood cell layer at the bottom of the empty cylinder 200 and drop it into the red blood cell pool 270;

[0059] 7. Move the liquid aspiration device to the top of the platelet and leukocyte pool 280 by the linear actuator 110, and extend the second electric telescopic rod 140 to squeeze out the platelet and leukocyte layer in the empty cylinder 200 and drop them into the platelet and leukocyte pool 280;

[0060] 8. Move the liquid aspirating device to the top of the plasma pool 290 by the linear actuator 110, and extend the second electric telescopic rod 140 to squeeze out the plasma layer in the empty cylinder 200 and drop it into the plasma pool 290;

[0061] 9. The liquid aspiration device is reset by the linear actuator 110 to perform circulating blood separation operation.

[0062] The method can better cycle the blood absorption, centrifugal separation and extrusion operations, and can realize large-scale automated processing of blood centrifugal separation.

[0063] In step five, before centrifugal separation, the liquid suction device is moved to the top of the support platform 300 by the linear actuator 110; then, the first electric telescopic rod 120 is extended to squeeze the barrel head 220 onto the rubber block 320; then, centrifugal separation is performed by the motor 250; and then the liquid is allowed to stand still, and after stratification, the barrel head 220 is returned to its original height by shortening the first electric telescopic rod 120.

[0064] Before centrifugation, the cartridge head 220 is pressed against the rubber block 320 and then rotated to avoid leakage.

[0065] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A livestock and poultry blood separation device, characterized in that: The invention comprises a plurality of linear actuators (110) arranged in parallel, wherein a first electric telescopic rod (120) capable of being extended upward and downward is connected below any linear actuator (110), a mounting frame (130) is connected below the first electric telescopic rod (120), a second electric telescopic rod (140) capable of being extended upward and downward is arranged at the top of the interior of the mounting frame (130), a movable plate (150) is connected below the second electric telescopic rod (140), and a plurality of groups of liquid suction devices are arranged on the bottom surface of the movable plate (150), wherein the liquid suction devices comprise a sleeve block (1 60), a sleeve block (160) is fixedly mounted on the bottom surface of the movable plate (150), a rotatable round block (170) is arranged inside the sleeve block (160), a pull rod (180) is fixedly connected below the round block (170), a piston (190) is arranged at the bottom end of the pull rod (180), an empty cylinder (200) is matched with the piston (190), a first bearing (210) is sleeved on the empty cylinder (200), the first bearing (210) is mounted on the bottom of the mounting frame (130), and a cylinder head (220) is arranged at the bottom end of the empty cylinder (200); The empty cylinder (200) is sleeved with a gear (230), the gears (230) between adjacent empty cylinders (200) of the same group of liquid aspiration devices are meshed, and the corresponding two gears (230) of the two groups of liquid aspiration devices are simultaneously meshed with a transmission wheel (240), the transmission wheel (240) is connected to a motor (250), and the motor (250) is installed at the bottom of the installation frame (130); A blood pool (260) is provided below the liquid aspiration device, and a red blood cell pool (270), a platelet and white blood cell pool (280), and a plasma pool (290) are provided on one side of the blood pool (260). A sleeve cavity (161) is provided in the sleeve block (160), a through hole (162) is provided below the sleeve cavity (161), the round block (170) is located in the sleeve cavity (161), and the pull rod (180) passes through the through hole (162); A plurality of balls (171) are respectively provided on the top surface and the bottom surface of the round block (170), and the balls (171) are attached to the inner wall of the sleeve cavity (161).

2. The livestock and poultry blood separation device according to claim 1, characterized in that: The sleeve block (160) comprises an upper portion (1601) and a lower portion (1602), wherein the upper portion (1601) is fixedly connected to the bottom surface of the movable plate (150), and the lower portion (1602) is detachably connected to the upper portion (1601).

3. The livestock and poultry blood separation device according to claim 2, characterized in that: A support platform (300) is provided between the blood pool (260) and the red blood cell pool (270), a plurality of second bearings (310) are fixedly mounted on the support platform (300), a rubber block (320) is fixedly provided on the inner ring of the second bearing (310), and the rubber block (320) can block the barrel head (220).

4. The livestock and poultry blood separation device according to claim 3, characterized in that: The linear actuator (110) comprises a body (111), a mounting cavity (112) is provided in the body (111), a lead screw (113) is provided in the mounting cavity (112), a lead screw nut (114) is sleeved on the lead screw (113), and the lead screw nut (114) is connected to a connecting block (115); a limiting hole (116) is provided on one side of the mounting cavity (112), and the connecting block (115) is connected to the first electric telescopic rod (120) after passing through the limiting hole (116); and a servo motor (117) is provided at one end of the body (111).

5. The livestock and poultry blood separation device according to claim 4, characterized in that: The connection block (115) is connected to a mounting plate (121) after passing through the limiting hole (116), and the first electric telescopic rod (120) is mounted on the mounting plate (121).

6. A method for separating blood from livestock and poultry, characterized in that: It uses a livestock and poultry blood separation device as described in claim 5, and includes the following steps:

1. Move the liquid aspiration device to above the blood pool (260) by means of a linear actuator (110); 2. Extending the first electric telescopic rod (120) so that the barrel head (220) on the liquid aspiration device enters the blood in the blood pool (260); 3. The second electric telescopic rod (140) is shortened to raise the piston (190) and suck the blood into the empty cylinder (200); Fourth, shortening the first electric telescopic rod (120) to return the barrel head (220) to its original height; 5. The motor (250) drives the transmission wheel (240) to rotate, and the transmission wheel (240) drives the gears (230) on the two sets of liquid aspiration devices to rotate, so that the empty cylinder (200) rotates to perform centrifugal separation. After rotating for a period of time, the empty cylinder is left to stand until the blood is separated into layers.

6. Move the liquid aspiration device to the top of the red blood cell pool (270) by means of the linear actuator (110), and extend the second electric telescopic rod (140) to squeeze out the red blood cell layer at the bottom of the empty tube (200) and drop it into the red blood cell pool (270); 7. Move the liquid aspiration device to the top of the platelet and leukocyte pool (280) by means of the linear actuator (110), and extend the second electric telescopic rod (140) to squeeze out the platelet and leukocyte layer in the empty cylinder (200) and drop them into the platelet and leukocyte pool (280); 8. The liquid aspiration device is moved to the top of the plasma pool (290) by the linear actuator (110), and the plasma layer in the empty cylinder (200) is squeezed out by extending the second electric telescopic rod (140) and dropped into the plasma pool (290); 9. The liquid aspiration device is reset by the linear actuator (110) to perform the circulating blood separation operation.

7. A method for separating blood from livestock and poultry according to claim 6, characterized in that: In step five, before centrifugal separation, the liquid suction device is moved to the top of the support platform (300) by the linear actuator (110); then, the first electric telescopic rod (120) is extended to squeeze the barrel head (220) onto the rubber block (320); then, centrifugal separation is performed by the motor (250); and after standing and stratification, the barrel head (220) is returned to its original height by shortening the first electric telescopic rod (120).

Citation Information

Patent Citations

  • Automatic blood separation system and method

    CN112221724A

  • Automatic platelet-rich plasma extraction device

    CN113499609A