CN118045646A - Serum extraction pipetting device and use method thereof - Google Patents

Abstract

The invention discloses a serum extraction pipetting device and a use method thereof, and relates to the technical field of serum pipetting, the serum extraction pipetting device comprises a chassis, an inner groove steel ring is fixedly arranged at the outer edge of the top surface of the chassis, an inner gear ring is rotationally clamped in the inner groove steel ring, a plurality of sleeves are fixedly arranged on the inner gear ring, a plurality of blood collection tubes and detection tubes are alternately inserted in the plurality of sleeves, a plurality of fixing blocks are fixedly arranged on the top surface of the chassis, an arc-shaped clamping block is arranged at the outer side of the fixing block, and the inner end part of the arc-shaped clamping block is propped against the blood collection tubes; the middle part of the top surface of chassis has set firmly fixed section of thick bamboo, has set firmly the fixed disk on the top surface of fixed section of thick bamboo, and the outside of fixed disk is equipped with a plurality of L type supports, and the outer tip of L type support runs through and inserts and have had electric straw, and electric straw's bottom portion inserts and establishes at the middle part in the heparin tube that corresponds. The invention reduces the pollution risk of manual operation to serum extraction through an automatic operation process, and is beneficial to maintaining the purity and quality of serum extraction so as to ensure the stability and accuracy of the performance of the serum extraction.

Description

Serum extraction pipetting device and use method thereof

Technical Field

The invention relates to the technical field of serum pipetting, in particular to a serum extraction pipetting device and a use method thereof.

Background

Many places such as hospitals or laboratories need blood collection tubes, however, when serum in the blood collection tubes needs to be detected, caps for the blood collection tubes need to be made, and then the serum in the blood collection tubes can be removed.

The safety serum transferring device (publication No. CN 213434540U) comprises a transferring cylinder and a sterilizing cover, wherein a roller conveyor is arranged at the bottom of the sterilizing cover, an elastic plate is arranged on the roller conveyor, a fixed base is fixedly arranged at the top of the inner wall of the sterilizing cover, a second electric telescopic rod is fixedly arranged at the bottom of the sterilizing cover, a driving frame is arranged at the other end of the second electric telescopic rod, a first telescopic rod is fixedly arranged at one side of the driving frame, one end of the driving frame, which is far away from the fixed base, is connected with the transferring cylinder, an injection needle is arranged at the bottom of the transferring cylinder, a piston is movably arranged in the transferring cylinder, one end of the piston is connected with a push rod, a push plate is arranged at the top of the push rod, and the push plate is fixedly connected with the bottom of the first electric telescopic rod.

When serum is manually extracted, more manpower and time are needed, particularly when a large amount of samples are processed, the efficiency is lower, and the shaking of the serum in the blood collection tube can be caused, so that the serum is scattered, and the loss of the serum is easy to cause; due to manual operation, the technical level and operating habits of each experimenter may be different, possibly leading to contamination of the sample, possibly leading to inaccuracy of the results.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a serum extraction pipetting device and a using method thereof.

In order to solve the problems existing in the prior art, the invention adopts the following technical scheme:

The serum extraction pipetting device comprises a chassis, wherein an inner groove steel ring which is concentrically distributed is fixedly arranged on the outer edge of the top surface of the chassis, an inner gear ring is clamped in the inner groove steel ring in a rotating manner, a plurality of sleeves are fixedly arranged on the inner gear ring, a plurality of blood collection tubes and detection tubes are alternately inserted in the sleeves, and arc-shaped gaps are formed in the bottom of each sleeve;

the top surface of the chassis is fixedly provided with a plurality of fixing blocks which are circularly distributed around the fixing cylinder, the outer side of each fixing block is provided with arc-shaped clamping blocks which are far away from the fixing cylinder, and the inner end parts of each arc-shaped clamping block are slidably inserted into corresponding arc-shaped gaps and propped against the blood collection tube;

The middle part of the top surface of the chassis is fixedly provided with concentrically distributed fixed barrels, the top surface of the fixed barrels is fixedly provided with concentrically distributed fixed disks, the outer sides of the fixed disks are provided with a plurality of circularly distributed L-shaped brackets, the outer end part of each L-shaped bracket is penetrated and inserted with an electric suction pipe, and the bottom end part of each electric suction pipe is inserted in the middle part in the corresponding blood collection pipe.

Preferably, a first through hole is formed in the top surface of the chassis, a first motor is fixedly arranged in the first through hole, a first gear which is concentrically fixedly connected is sleeved at the end part of a motor shaft of the first motor, and the first gear is meshed with the inner gear ring.

Preferably, a rectangular notch is formed in the outer end portion of the arc-shaped clamping block, a pair of movably hinged second connecting rods are arranged in the rectangular notch, second notch gears are fixedly arranged at the inner end portions of the second connecting rods, and the second notch gears are in meshed connection.

Preferably, a pair of movably hinged first connecting rods are arranged on the top surface of the fixed block, a first notch gear is fixedly arranged at the inner end part of each first connecting rod, and the outer end part of each first connecting rod is movably hinged with the outer end part of the corresponding second connecting rod.

Preferably, a T-shaped sliding groove is formed in the middle of the top surface of the fixed block, a T-shaped sliding plate in sliding connection is clamped in the T-shaped sliding groove, a double-sided rack is fixedly arranged on the top surface of the T-shaped sliding plate, and the double-sided rack is meshed with a pair of first notch gears.

Preferably, the middle part cover of the outer ring face of the fixed cylinder is provided with an outer channel steel ring which is fixedly connected with the outer channel steel ring in a concentric manner, the outer side of the outer channel steel ring is rotationally clamped with an outer gear ring, the top surface of the outer gear ring is provided with a plurality of articulated connecting rods which are articulated in a movable manner, and the outer end part of each articulated connecting rod is articulated with the inner end part of the double-sided rack on the corresponding side in a movable manner.

Preferably, a second through hole is formed in the top surface of the chassis, a second motor is fixedly arranged in the second through hole, a second gear which is concentrically fixedly connected is sleeved at the end part of a motor shaft of the second motor, and the second motor is meshed and connected with the outer gear ring.

Preferably, the top surface of the fixed disk is fixedly provided with a plurality of U-shaped lugs distributed in a circular shape, the bottom of each L-shaped bracket is provided with a U-shaped notch, and a pair of parallel connecting rods which are movably hinged and distributed in parallel are arranged in the U-shaped notches on one side of each U-shaped lug and the corresponding U-shaped notch.

Preferably, the inner ends of the parallel connecting rods positioned below are fixedly provided with notch worm wheels, the middle part of the top surface of the fixed disc is provided with a circular through hole, the inside of the circular through hole is fixedly provided with a third motor with an upward output end, the end part of a motor shaft of the third motor is sleeved with a worm concentrically fixedly connected, and the worm is sequentially meshed with a plurality of notch worm wheels.

The invention also provides a use method of the serum extraction pipetting device, which comprises the following steps:

Firstly, placing a plurality of blood collection tubes containing blood in a sleeve at intervals, placing a plurality of empty detection tubes in the rest sleeve, standing for a certain period, and sequentially punching caps of the blood collection tubes and the detection tubes;

Step two, starting a second motor, wherein a motor shaft of the second motor drives a second gear to synchronously rotate, the second gear is meshed with the second gear to drive an outer gear ring to reversely rotate along an outer channel steel ring, and under the hinging action of a hinging connecting rod, a double-sided rack and a T-shaped sliding plate are driven to inwards slide along a T-shaped sliding groove;

The double-sided rack is meshed to drive a pair of first notch gears to relatively rotate and drive a pair of first connecting rods to relatively fold, synchronously drive a pair of second connecting rods to relatively fold and drive a pair of second notch gears to relatively rotate, further drive the arc-shaped clamping blocks to prop against the blood collection tubes and fix a plurality of blood collection tubes;

Starting a third motor, wherein a motor shaft of the third motor drives a worm to synchronously rotate, and the worm is meshed with a plurality of notch worm gears to rotate;

synchronously controlling a plurality of electric suction pipes to suck liquid, extracting serum in the blood collection pipe through the electric suction pipes, and then controlling a motor shaft of a third motor to reversely rotate to drive the L-shaped bracket and the electric suction pipes to ascend;

controlling the motor shaft of the second motor to reversely rotate to drive a plurality of arc-shaped clamping blocks to loosen the fixation of the blood collection tube;

Starting a first motor, wherein a motor shaft of the first motor drives a first gear to synchronously rotate, the first gear is meshed with the first gear to drive an internal gear ring and a plurality of sleeves to rotate along an internal groove steel ring, and a plurality of detection pipes are driven to move to the position right below an electric suction pipe;

Then controlling the motor shaft of the second motor to rotate forward, driving the arc-shaped clamping blocks to abut against the detection tubes, and fixing a plurality of detection tubes;

Step five, controlling the motor shaft of the third motor to rotate positively to drive the L-shaped bracket and the electric suction pipes to drop downwards, so that the bottom ends of the electric suction pipes drop into the top end openings of the detection pipes, and then synchronously controlling a plurality of electric suction pipes to drain liquid, so that serum is synchronously transferred into a plurality of detection pipes;

And then controlling the second motor to loosen the fixation of the detection tube, sequentially taking down the plurality of blood collection tubes and the detection tube, and carrying out subsequent detection operation on serum extracted from the detection tube.

Compared with the prior art, the invention has the beneficial effects that:

1. In the invention, serum can be extracted by controlling the liquid suction of the electric suction pipe, and the serum can be transferred into the detection pipe by controlling the liquid discharge of the electric suction pipe; through automatic operation, the extraction and pipetting processes can be completed rapidly and accurately, and errors and variability of manual operation are reduced;

2. according to the invention, the stability of the use of the blood collection tube and the detection tube can be ensured through the cooperation of the arc-shaped clamping blocks and the sleeve; compared with manual extraction, the method can greatly save operation time, improve the efficiency of subsequent detection and provide highly repeatable detection effect;

in summary, the invention solves the problem of inconvenient manual serum extraction and pipetting, reduces the pollution risk of manual operation to serum extraction through an automatic operation process, and is beneficial to maintaining the purity and quality of serum extraction so as to ensure the stability and accuracy of the performance of the serum extraction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a schematic view of the right-hand structure of the present invention in section;

FIG. 4 is a schematic view of the meshing of a first gear with an inner gear ring according to the present invention;

FIG. 5 is a schematic diagram of the meshing of a worm with a plurality of notched worm gears according to the present invention;

FIG. 6 is a schematic diagram of the meshing of a second gear with an external gear ring according to the present invention;

Number in the figure: 1. a chassis; 11. an inner groove steel ring; 12. an inner gear ring; 13. a sleeve; 14. a blood collection tube; 15. a detection tube; 16. a first motor; 17. a first gear; 2. a fixed cylinder; 21. a fixed plate; 22. u-shaped ear seats; 23. parallel connecting rods; 24. an L-shaped bracket; 25. an electric suction pipe; 26. a notched worm gear; 27. a third motor; 28. a worm; 3. an outer channel steel ring; 31. an outer gear ring; 32. a fixed block; 33. a first link; 34. a second link; 35. arc clamping blocks; 36. a hinged connecting rod; 37. double-sided racks; 38. a second motor; 39. and a second gear.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Embodiment one: the embodiment provides a serum extraction pipetting device, see fig. 1-6, specifically, the serum extraction pipetting device comprises a chassis 1, wherein an inner groove steel ring 11 which is concentrically distributed is fixedly arranged on the outer edge of the top surface of the chassis 1, an inner gear ring 12 is rotationally clamped in the inner groove steel ring 11, a plurality of sleeves 13 are fixedly arranged on the inner gear ring 12, a plurality of blood collection tubes 14 and detection tubes 15 are alternately inserted in the plurality of sleeves 13, and arc-shaped gaps are formed in the bottom of each sleeve 13;

The top surface of the chassis 1 is fixedly provided with a plurality of fixing blocks 32 which are circularly distributed around the fixing cylinder 2, the outer side of each fixing block 32 is provided with arc-shaped clamping blocks 35 which are far away from the distribution, and the inner end part of each arc-shaped clamping block 35 is inserted into the corresponding arc-shaped notch in a sliding way and is propped against the blood collection tube 14;

The middle part of the top surface of the chassis 1 is fixedly provided with a fixed cylinder 2 which is concentrically distributed, the top surface of the fixed cylinder 2 is fixedly provided with a fixed disk 21 which is concentrically distributed, the outer side of the fixed disk 21 is provided with a plurality of L-shaped brackets 24 which are circularly distributed, the outer end part of each L-shaped bracket 24 is penetrated and inserted with an electric suction pipe 25, and the bottom end part of each electric suction pipe 25 is inserted with the middle part in the corresponding blood collection pipe 14; serum can be extracted by controlling the suction of the electric suction tube 25, and the serum can be transferred into the detection tube 15 by controlling the discharge of the electric suction tube 25.

The description is as follows: in the embodiment, a first through hole is formed in the top surface of the chassis 1, a first motor 16 is fixedly arranged in the first through hole, a first gear 17 which is concentrically fixedly connected is sleeved at the end part of a motor shaft of the first motor 16, and the first gear 17 is meshed with the inner gear ring 12; the motor shaft of the first motor 16 drives the first gear 17 to synchronously rotate, and the first gear 17 is meshed with the inner gear ring 12 and the sleeves 13 to rotate along the inner groove steel ring 11.

Embodiment two: the present embodiment further includes, on the basis of the first embodiment:

In a specific implementation process, as shown in fig. 3 and 6, a rectangular notch is formed at the outer end of the arc-shaped clamping block 35, a pair of movably hinged second connecting rods 34 are arranged in the rectangular notch, a second notch gear is fixedly arranged at the inner end of each second connecting rod 34, and the second notch gears are in meshed connection;

The top surface of the fixed block 32 is provided with a pair of movably hinged first connecting rods 33, the inner end part of each first connecting rod 33 is fixedly provided with a first notch gear, and the outer end part of each first connecting rod 33 is movably hinged with the outer end part of a corresponding second connecting rod 34;

A T-shaped sliding groove is formed in the middle of the top surface of the fixed block 32, a T-shaped sliding plate in sliding connection is clamped in the T-shaped sliding groove, a double-sided rack 37 is fixedly arranged on the top surface of the T-shaped sliding plate, and the double-sided rack 37 is in meshed connection with a pair of first notch gears;

The double-sided rack 37 is meshed to drive the pair of first notch gears to rotate relatively and drive the pair of first connecting rods 33 to fold relatively, synchronously drive the pair of second connecting rods 34 to fold relatively and drive the pair of second notch gears to rotate relatively, and further drive the arc-shaped clamping blocks 35 to abut against the blood collection tube 14 or the detection tube 15.

Embodiment III: the second embodiment further includes, on the basis of the second embodiment:

In the specific implementation process, as shown in fig. 3 and 6, an outer groove steel ring 3 concentrically fixedly connected is sleeved in the middle of the outer ring surface of the fixed cylinder 2, an outer gear ring 31 is rotationally clamped on the outer side of the outer groove steel ring 3, a plurality of articulated connecting rods 36 which are movably articulated are arranged on the top surface of the outer gear ring 31, and the outer end part of each articulated connecting rod 36 is movably articulated with the inner end part of a double-sided rack 37 on the corresponding side;

A second through hole is formed in the top surface of the chassis 1, a second motor 38 is fixedly arranged in the second through hole, a second gear 39 which is concentrically fixedly connected is sleeved at the end part of a motor shaft of the second motor 38, and the second motor 38 is meshed and connected with the external gear ring 31;

the motor shaft of the second motor 38 drives the second gear 39 to synchronously rotate, the second gear 39 is meshed to drive the outer gear ring 31 to reversely rotate along the outer groove steel ring 3, and the double-sided rack 37 and the T-shaped sliding plate are driven to slide along the T-shaped sliding groove under the hinging action of the hinging connecting rod 36.

Embodiment four: the third embodiment further includes:

in a specific implementation process, as shown in fig. 3 and 5, a plurality of U-shaped lugs 22 are fixedly arranged on the top surface of a fixed disk 21, a U-shaped notch is formed in the bottom of each L-shaped bracket 24, and a pair of parallel connecting rods 23 which are movably hinged and are distributed in parallel are arranged in each U-shaped lug 22 and the U-shaped notch on the corresponding side;

The inner ends of the parallel connecting rods 23 positioned below are fixedly provided with notch worm gears 26, the middle part of the top surface of the fixed disc 21 is provided with a circular through hole, the inside of the circular through hole is fixedly provided with a third motor 27 with an upward output end, the end part of a motor shaft of the third motor 27 is sleeved with a worm 28 which is concentrically fixedly connected, and the worm 28 is sequentially meshed with the notch worm gears 26;

The motor shaft of the third motor 27 drives the worm 28 to synchronously rotate, the worm 28 is meshed with and drives the plurality of notch worm gears 26 to rotate, and the L-shaped bracket 24 and the electric suction pipe 25 are driven to fall down due to the fact that the plurality of pairs of parallel connecting rods 23 are arranged in parallel.

Specifically, the working principle and the operation method of the invention are as follows:

Firstly, placing a plurality of blood collection tubes 14 containing blood in a sleeve 13 at intervals, placing a plurality of empty detection tubes 15 in the rest sleeve 13, standing for a certain period, and then sequentially capping the blood collection tubes 14 and the detection tubes 15;

Step two, starting a second motor 38, wherein a motor shaft of the second motor 38 drives a second gear 39 to synchronously rotate, the second gear 39 is meshed to drive an outer gear ring 31 to reversely rotate along an outer groove steel ring 3, and under the hinging action of a hinging connecting rod 36, a double-sided rack 37 and a T-shaped sliding plate are driven to inwards slide along a T-shaped sliding groove;

the double-sided rack 37 is meshed to drive a pair of first notch gears to relatively rotate and drive a pair of first connecting rods 33 to relatively fold, synchronously drive a pair of second connecting rods 34 to relatively fold and drive a pair of second notch gears to relatively rotate, further drive the arc-shaped clamping blocks 35 to abut against the blood collection tube 14 and fix a plurality of blood collection tubes 14;

step three, a third motor 27 is started, a motor shaft of the third motor 27 drives a worm 28 to synchronously rotate, the worm 28 is meshed with and drives a plurality of notch worm gears 26 to rotate, and as a plurality of pairs of parallel connecting rods 23 are arranged in parallel, an L-shaped bracket 24 and an electric suction pipe 25 are driven to fall downwards;

Synchronously controlling a plurality of electric suction pipes 25 to suck liquid, extracting serum in the blood collection tube 14 through the electric suction pipes 25, and then controlling a motor shaft of a third motor 27 to reversely rotate so as to drive the L-shaped bracket 24 and the electric suction pipes 25 to ascend;

step four, controlling the motor shaft of the second motor 38 to reversely rotate so as to drive the arc-shaped clamping blocks 35 to loosen the fixation of the blood collection tube 14;

Starting the first motor 16, wherein a motor shaft of the first motor 16 drives the first gear 17 to synchronously rotate, the first gear 17 is meshed with the inner gear ring 12, the plurality of sleeves 13 are driven to rotate along the inner groove steel ring 11, and the plurality of detection pipes 15 are driven to move to the position right below the electric suction pipe 25;

Then the motor shaft of the second motor 38 is controlled to rotate forward, so that the arc-shaped clamping blocks 35 are driven to abut against the detection tubes 15, and a plurality of detection tubes 15 are fixed;

step five, the motor shaft of the third motor 27 is controlled to rotate positively to drive the L-shaped bracket 24 and the electric suction pipes 25 to drop downwards, so that the bottom ends of the electric suction pipes 25 drop into the top ports of the detection pipes 15, and then a plurality of electric suction pipes 25 are synchronously controlled to drain liquid, so that serum is synchronously transferred into a plurality of detection pipes 15;

And then the second motor 38 is controlled to loosen the fixation of the detection tube 15, and sequentially take down the plurality of blood collection tubes 14 and the detection tube 15, and carry out subsequent detection operation on serum extracted from the detection tube 15.

The invention solves the problem of inconvenient manual serum extraction and pipetting, reduces the pollution risk of manual operation to serum extraction through an automatic operation process, and is beneficial to maintaining the purity and quality of serum extraction so as to ensure the stability and accuracy of the performance of the serum extraction.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. Serum draws pipetting device, including chassis (1), its characterized in that: an inner groove steel ring (11) which is concentrically distributed is fixedly arranged on the outer edge of the top surface of the chassis (1), an inner gear ring (12) is clamped in the inner groove steel ring (11) in a rotating mode, a plurality of sleeves (13) are fixedly arranged on the inner gear ring (12), a plurality of blood collection tubes (14) and detection tubes (15) are alternately inserted into a plurality of sleeves (13), and arc-shaped gaps are formed in the bottom of each sleeve (13);

a plurality of fixing blocks (32) which are circularly distributed around the fixing cylinder (2) are fixedly arranged on the top surface of the chassis (1), arc-shaped clamping blocks (35) which are far away from the distribution are arranged on the outer side of each fixing block (32), and the inner end parts of the arc-shaped clamping blocks (35) are slidably inserted into corresponding arc-shaped gaps and propped against the blood collection tube (14);

The utility model discloses a blood collection device, including chassis (1), chassis, fixed barrel (2) that the top surface middle part of chassis (1) set firmly concentric distribution, fixed disk (21) that have set firmly concentric distribution on the top surface of fixed barrel (2), the outside of fixed disk (21) is equipped with a plurality of circular distribution's L type support (24), every the outer tip of L type support (24) has all run through and has inserted electric straw (25), every electric straw (25)'s bottom is inserted and is established middle part in blood sampling pipe (14) that correspond.

2. The serum extraction pipetting device of claim 1, wherein: the novel electric power steering device is characterized in that a first through hole is formed in the top surface of the chassis (1), a first motor (16) is fixedly arranged in the first through hole, a first gear (17) concentrically fixedly connected with the end part of a motor shaft of the first motor (16) is sleeved on the end part of the motor shaft, and the first gear (17) is meshed with the inner gear ring (12).

3. A serum extraction pipetting device according to claim 2, wherein: the outer end of the arc-shaped clamping block (35) is provided with a rectangular notch, a pair of movably hinged second connecting rods (34) are arranged in the rectangular notch, second notch gears are fixedly arranged at the inner end of each second connecting rod (34), and the second notch gears are in meshed connection.

4. A serum extraction pipetting device according to claim 3, wherein: a pair of movable hinged first connecting rods (33) are arranged on the top surface of the fixed block (32), a first notch gear is fixedly arranged at the inner end part of each first connecting rod (33), and the outer end part of each first connecting rod (33) is movably hinged with the outer end part of a corresponding second connecting rod (34).

5. The serum extraction pipetting device of claim 4, wherein: t-shaped sliding grooves are formed in the middle of the top surface of the fixed block (32), T-shaped sliding plates in sliding connection are clamped in the T-shaped sliding grooves, double-sided racks (37) are fixedly arranged on the top surface of the T-shaped sliding plates, and the double-sided racks (37) are meshed with a pair of first notch gears.

6. The serum extraction pipetting device of claim 5, wherein: the outer ring surface middle part cover of fixed section of thick bamboo (2) is equipped with outer cell steel ring (3) of concentric rigid coupling, the outside rotation block of outer cell steel ring (3) has external gear ring (31), be equipped with a plurality of articulated connecting rod (36) on the top surface of external gear ring (31), every the outer tip of articulated connecting rod (36) all with the interior tip activity hinge of the two-sided rack (37) of corresponding one side.

7. The serum extraction pipetting device of claim 6, wherein: the top surface of chassis (1) has seted up the second through-hole, the inside of second through-hole has set firmly second motor (38), the motor shaft tip cover of second motor (38) is equipped with concentric rigid coupling's second gear (39), second motor (38) are connected with external gear ring (31) meshing.

8. The serum extraction pipetting device of claim 7, wherein: the U-shaped lug seats (22) which are distributed circularly are fixedly arranged on the top surface of the fixed disc (21), U-shaped gaps are formed in the bottoms of the L-shaped brackets (24), and a pair of parallel connecting rods (23) which are hinged movably and distributed in parallel are arranged in the U-shaped gaps on one side of each U-shaped lug seat (22) and the corresponding U-shaped gap.

9. The serum extraction pipetting device of claim 8, wherein: the inner ends of parallel connecting rods (23) positioned below are fixedly provided with notch worm wheels (26), the middle part of the top surface of the fixed disc (21) is provided with a circular through hole, the inside of the circular through hole is fixedly provided with a third motor (27) with an upward output end, the end part of a motor shaft of the third motor (27) is sleeved with a worm (28) concentrically fixedly connected, and the worm (28) is sequentially meshed with the notch worm wheels (26).

10. The method of using a serum extraction pipetting device according to claim 9, comprising the steps of:

firstly, placing a plurality of blood sampling tubes (14) containing blood in a sleeve (13) at intervals, placing a plurality of empty detection tubes (15) in the rest sleeve (13), standing for a certain period, and then sequentially punching caps of the blood sampling tubes (14) and the detection tubes (15);

step two, starting a second motor (38), wherein a motor shaft of the second motor (38) drives a second gear (39) to synchronously rotate, the second gear (39) is meshed to drive an outer gear ring (31) to reversely rotate along an outer groove steel ring (3), and under the hinging action of a hinging connecting rod (36), a double-sided rack (37) and a T-shaped sliding plate are driven to inwards slide along a T-shaped sliding groove;

The double-sided rack (37) is meshed to drive a pair of first notch gears to relatively rotate and drive a pair of first connecting rods (33) to relatively fold, synchronously drive a pair of second connecting rods (34) to relatively fold and drive a pair of second notch gears to relatively rotate, further drive an arc-shaped clamping block (35) to prop against the blood collection tube (14) and fix a plurality of blood collection tubes (14);

starting a third motor (27), wherein a motor shaft of the third motor (27) drives a worm (28) to synchronously rotate, the worm (28) is meshed with a plurality of notch worm gears (26) to rotate, and the L-shaped bracket (24) and the electric suction tube (25) are driven to fall down due to the fact that a plurality of pairs of parallel connecting rods (23) are arranged in parallel;

Synchronously controlling a plurality of electric suction pipes (25) to suck liquid, extracting serum in the blood collection tube (14) through the electric suction pipes (25), and then controlling a motor shaft of a third motor (27) to reversely rotate so as to drive the L-shaped bracket (24) and the electric suction pipes (25) to ascend;

Controlling the motor shaft of the second motor (38) to reversely rotate to drive the arc-shaped clamping blocks (35) to loosen the fixing of the blood collection tube (14);

starting a first motor (16), wherein a motor shaft of the first motor (16) drives a first gear (17) to synchronously rotate, the first gear (17) is meshed to drive an internal gear ring (12) and a plurality of sleeves (13) to rotate along an inner groove steel ring (11), and a plurality of detection pipes (15) are driven to move to the position right below an electric suction pipe (25);

then controlling the motor shaft of the second motor (38) to rotate positively, driving the arc-shaped clamping blocks (35) to abut against the detection tubes (15), and fixing a plurality of detection tubes (15);

Step five, controlling a motor shaft of a third motor (27) to rotate positively to drive an L-shaped bracket (24) and an electric suction pipe (25) to fall downwards, so that the bottom end of the electric suction pipe (25) falls into a top end port of a detection pipe (15), and then synchronously controlling a plurality of electric suction pipes (25) to drain liquid, so that serum is synchronously drained into a plurality of detection pipes (15);

And then controlling the second motor (38) to loosen the fixation of the detection tube (15), sequentially taking down the plurality of blood collection tubes (14) and the detection tube (15), and carrying out subsequent detection operation on serum extracted from the detection tube (15).