CN221085666U

CN221085666U - Disposable multichannel liquid transfer straw

Info

Publication number: CN221085666U
Application number: CN202322851883.4U
Authority: CN
Inventors: 次云哲; 孙钉发; 杨静
Original assignee: Chengde Medical University
Current assignee: Chengde Medical University
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-06-07
Anticipated expiration: 2033-10-24

Abstract

The application relates to a disposable multi-channel liquid transfer pipette which comprises a plurality of pipettes which are linearly and equidistantly arranged, and further comprises a communicating pipe which is communicated with the tops of the plurality of pipettes, an air pipe which is communicated with the communicating pipe, and an elastic air bag which is communicated with one end of the air pipe, which is far away from the communicating pipe. The application has the effects of reducing cost and being convenient to carry and operate.

Description

Disposable multichannel liquid transfer straw

Technical Field

The application relates to the field of pipettes, in particular to a disposable multi-channel pipette.

Background

The pipettor is an essential experimental instrument for all biochemical laboratories to perform all immunization, cell culture, clinical diagnosis and food analysis, and biochemical reagents can be transferred into a specific experimental vessel through the pipettor. The number of times of pipetting in single biochemical experiments is greatly reduced due to the appearance of the multi-channel pipettor, the pipetting time is shortened, and the pipetting efficiency is improved.

Through retrieving, the application number is CN202223422686.2, and its technical essential lies in: comprises a shell, a plurality of pipettes, a push plate, a limiting piece and a driving piece. A plurality of pipettes are arranged in the shell, and each pipette is provided with a piston head. The push plate is arranged in the shell and is provided with a plurality of clamping grooves which are respectively used for placing a plurality of piston heads. The limiting piece is covered on the push plate and is clamped with the push plate so as to limit the piston head from falling off the clamping groove. The driving piece is provided with a driving rod, and the driving rod is connected with the push plate and used for driving the push plate to move.

In view of the above-mentioned related art, the present inventors believe that the multi-channel pipettes employed in the above-mentioned schemes are capable of performing precise pipetting operations, but have a relatively complex structure, high cost, and inconvenient portability.

Disclosure of utility model

In order to reduce the cost and facilitate carrying and operation, the application provides a disposable multi-channel pipette.

The application provides a disposable multi-channel liquid transfer pipette, which adopts the following technical scheme:

The disposable multichannel pipette comprises a plurality of pipettes which are arranged in a linear equidistant manner, and further comprises a plurality of communicating pipes which are communicated with the tops of the pipettes, a gas pipe which is communicated with the communicating pipes, and an elastic airbag which is communicated with one end of the gas pipe away from the communicating pipes.

Preferably, the air pipe comprises a fixing part connected with the communicating pipe, a rotating part connected with the elastic air bag and connected with the fixing part in a rotating way, an axial connecting piece is arranged between the rotating part and the fixing part, a first partition plate is arranged in the fixing part, the first partition plate separates the inside of the fixing part to form a first channel and a second channel, one end of the first channel away from the rotating part is in a closed way, an air inlet hole communicated with the outside is formed in the side wall of the first channel, a second partition plate is arranged in the rotating part, a third channel and a fourth channel are formed by the inner separation of the rotating part by the second partition plate, and a first unidirectional air inlet valve and a second unidirectional air inlet valve are respectively arranged in the fourth channel and have opposite air inlet directions.

Preferably, one end of the rotating part, which is far away from the elastic air bag, is fixedly connected with a sealing plate for sealing the third channel and the fourth channel, the bottom of the second partition plate is fixedly connected with the sealing plate, and the sealing plate is provided with a first through hole and a second through hole which are respectively communicated with the third channel and the fourth channel.

Preferably, the first one-way air inlet valve and the second one-way air inlet valve are of duckbill valve type structures.

Preferably, the axial connecting piece comprises a first fixed ring fixedly connected to the end face of the fixed part and extending around the circumference thereof, a second fixed ring fixedly connected to the end face of the rotating part and extending around the circumference thereof, a first limiting ring fixedly connected to the outer wall of the first fixed ring, and a second limiting ring fixedly connected to the inner wall of the second fixed ring, wherein the second fixed ring is sleeved outside the first fixed ring, and is clamped between the first limiting ring and the fixed part.

Preferably, the outer wall of the first fixing ring is fixedly connected with a sealing ring, the sealing ring is located between the first limiting ring and the second limiting ring, and the outer edge of the sealing ring is elastically abutted to the inner wall of the second fixing ring.

Preferably, the outer walls of the suction pipes are provided with scale marks which are arranged along the length direction of the suction pipes.

Preferably, friction lines are arranged on the outer wall of the rotating part.

In summary, the present application includes at least one of the following beneficial technical effects:

Through arranging the elastic air bag, the air pipe, the communicating pipe and the suction pipe which are mutually matched, when the pipetting operation is carried out, the rotating part is rotated to enable the third channel to correspond to the first channel, the fourth channel corresponds to the second channel, thereby enabling the first one-way valve to be communicated with the air inlet hole, and the second one-way valve to be communicated with the communicating pipe, at the moment, a plurality of ends of the suction pipe extend into the solution to be transferred, the elastic air bag is pressed, positive pressure air in the elastic air bag enters the first channel through the first one-way valve and is discharged through the air inlet hole, when the elastic air bag is loosened, the inside of the elastic air bag is negative pressure, at the moment, the first one-way valve is closed, the second one-way valve is toward the inside of the elastic air bag for air inlet, when the elastic air bag is released, the inside of the elastic air bag is negative pressure, at the moment, the first one-way valve is closed, and external air enters the inside of the elastic air bag through the air inlet and the second one-way valve to balance air pressure, so that the whole pipetting operation is completed, and the use is convenient;

By arranging the sealing plate and arranging the first through hole and the second through hole on the sealing plate, when the rotating part is rotated, the third channel and the fourth channel are more easily communicated with only one of the first channel or the second channel, the first channel and the second channel are not easily communicated with the third channel or the fourth channel at the same time, the first check valve and the second check valve are invalid, and the fault tolerance of operation is improved;

Under the mutually supporting of first spacing ring and second spacing ring, make carry out axial connection between fixed part and the rotation portion, and can carry out the rotation in the circumference, conveniently dismantle simultaneously, and through setting up the sealing ring to promote the gas tightness of connecting between fixed part and the rotation portion.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a partial cross-sectional view of an embodiment of the present application.

Fig. 3 is a partial enlarged view of a portion a in fig. 2.

Reference numerals illustrate: 1. an elastic air bag; 2. an air pipe; 3. a communicating pipe; 4. a suction pipe; 5. scale marks; 6. a fixing part; 7. a rotating part; 8. an axial connector; 9. a first fixing ring; 10. a second fixing ring; 11. a first stop collar; 12. a second limiting ring; 13. a seal ring; 14. a first separator; 15. a first channel; 16. a second channel; 17. an air inlet hole; 18. a second separator; 19. a third channel; 20. a fourth channel; 21. a first one-way intake valve; 22. a second one-way intake valve; 23. a sealing plate; 24. a first through hole; 25. a second through hole; 26. a first mark; 27. and a second mark.

Description of the embodiments

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a disposable multi-channel liquid transferring straw. Referring to fig. 1-3, a disposable multi-channel pipette comprises an elastic air bag 1, an air tube 2, a communicating tube 3 and a plurality of pipettes 4, wherein the pipettes 4 are parallel to each other and are linearly equidistantly arranged, and for more accurate solution inhalation and solution extrusion, the outer walls of the pipettes 4 are provided with scale marks 5 arranged along the length direction of the pipette.

And because pipetting is many to cooperate 96 orifice plates (the hole of 8 x 12 has been laid to the form of matrix) use, straw 4 preferably sets up to 8, and communicating pipe 3 intercommunication is in the top of 8 straw 4, and mutually perpendicular between communicating pipe 3 and the trachea 2, and trachea 2 intercommunication is in communicating pipe 3 one side of keeping away from straw 4, and elastic air bag 1 preferably sets up to spherically, and communicates in trachea 2 one end of keeping away from communicating pipe 3.

Further, the air pipe 2 comprises a fixing part 6 connected with the communicating pipe 3, a rotating part 7 connected with the elastic air bag 1 and connected with the fixing part 6 in a rotating way, an axial connecting piece 8 is arranged between the rotating part 7 and the fixing part 6, the axial connecting piece 8 comprises a first fixing ring 9 fixedly connected with the end face of the fixing part 6 and extending around the circumference thereof, a second fixing ring 10 fixedly connected with the end face of the rotating part 7 and extending around the circumference thereof, a first limiting ring 11 fixedly connected with the outer wall of the first fixing ring 9, and a second limiting ring 12 fixedly connected with the inner wall of the second fixing ring 10, and friction lines are arranged on the outer wall of the rotating part 7 for facilitating the operation of the rotating part 7.

The second fixing ring 10 is sleeved outside the first fixing ring 9, the first limiting ring 11 is clamped between the second limiting ring 12 and the rotating portion 7, the second limiting ring 12 is clamped between the first limiting ring 11 and the fixing portion 6, a chamfer is arranged at the outer edge of the first limiting ring 11, which is close to the rotating portion 7, and a chamfer is arranged at the inner edge of the second limiting ring 12, which is close to the fixing portion 6, for convenience in installation. In order to ensure the tightness between the first fixed ring 9 and the second fixed ring 10, the outer wall of the first fixed ring 9 is fixedly connected with a sealing ring 13, the sealing ring 13 is positioned between the first limiting ring 11 and the second limiting ring 12, and the outer edge of the sealing ring 13 is elastically abutted against the inner wall of the second fixed ring 10.

Under the mutually supporting of first spacing ring 11 and second spacing ring 12, make and carry out axial connection between fixed part 6 and the rotation portion 7, and can carry out the rotation in circumference, conveniently dismantle simultaneously, and through setting up sealing ring 13 to promote the gas tightness of connecting between fixed part 6 and the rotation portion 7.

For the operation of being convenient for inhale and extrude the pipettor, be equipped with first baffle 14 in the fixed part 6, first baffle 14 separates the fixed part 6 inside and forms first passageway 15 and second passageway 16, and the one end that the rotation portion 7 was kept away from to first passageway 15 is sealed the setting to make first passageway 15 only can one-way intercommunication in elastic air bag 1, and the inlet port 17 that communicates in the outside has been seted up to first passageway 15 lateral wall.

The second partition 18 is arranged in the rotating part 7, the second partition 18 divides the interior of the rotating part 7 to form a third channel 19 and a fourth channel 20, a first one-way air inlet valve 21 and a second one-way air inlet valve 22 are respectively arranged in the third channel 19 and the fourth channel 20, the first one-way air inlet valve 21 and the second one-way air inlet valve 22 are preferably arranged in a duckbill valve type structure, the first one-way air inlet valve 21 limits the air to flow in a direction away from the elastic air bag 1, and the second one-way air inlet valve 22 limits the air to flow in a direction close to the elastic air bag 1.

The end of the rotating part 7 far away from the elastic air bag 1 is fixedly connected with a sealing plate 23 for sealing the third channel 19 and the fourth channel 20, the bottom of the second partition 18 is fixedly connected with the sealing plate 23, and the sealing plate 23 is provided with a first through hole 24 and a second through hole 25 which are respectively communicated with the third channel 19 and the fourth channel 20.

By arranging the sealing plate 23 and arranging the first through hole 24 and the second through hole 25 on the sealing plate 23, when the rotating part 7 is rotated, the third channel 19 and the fourth channel 20 are more easily communicated with only one of the first channel 15 or the second channel 16, the first channel 15 and the second channel 16 are not easily communicated with the third channel 19 or the fourth channel 20 at the same time, the first check valve and the second check valve are invalid, and the fault tolerance of operation is improved.

In order to confirm the relative position between the rotating part 7 and the fixed part 6 in the circumferential direction, the two sides of the top end of the outer wall of the fixed part 6 are respectively provided with a first mark 26, the radian of the interval between the first marks 26 on the two sides is 180 degrees, the bottom end of the outer wall of the rotating part 7 is provided with a second mark 27, and when the second marks 27 are respectively corresponding to the two first marks 26, namely, the third channel 19 is only communicated with the first channel 15 or the second channel 16, so that an operator rotates the rotating part 7 more intuitively and is not easy to generate misoperation.

The embodiment of the application provides a disposable multi-channel liquid transfer pipette, which comprises the following implementation principle:

When pipetting operation is performed, the rotation part 7 is rotated to enable the third channel 19 to correspond to the first channel 15, the fourth channel 20 to correspond to the second channel 16, so that communication is formed between the first one-way valve and the air inlet hole 17, communication is formed between the second one-way valve and the communicating pipe 3, at the moment, the ends of the plurality of suction pipes 4 extend into the solution to be transferred, the elastic air bag 1 is pressed, positive pressure air in the elastic air bag 1 enters the first channel 15 through the first one-way valve and is discharged through the air inlet hole 17, when the elastic air bag 1 is loosened, the inside of the elastic air bag 1 is negative pressure, at the moment, the first one-way valve is closed, the second one-way valve is opened towards the inside of the elastic air bag 1, so that negative pressure is formed at the ports of the plurality of suction pipes 4, the solution is sucked into the straw 4, when the solution is required to be extruded, the rotating part is rotated, the third channel 19 corresponds to the second channel 16, the fourth channel 20 corresponds to the first channel 15, the second one-way valve is communicated with the air inlet hole 17, the first one-way valve is communicated with the communicating pipe 3, at the moment, the elastic air bag 1 is pressed by pressing the elastic air bag 1, the air is positive pressure in the elastic air bag 1, the air pushes the solution in the straw 4 to extrude through the first one-way valve and the communicating pipe 3, when the elastic air bag 1 is loosened, the elastic air bag 1 is negative pressure, the first one-way valve is closed, and the external air enters the elastic air bag 1 through the air inlet hole 17 and the second one-way valve to balance the air pressure, so that the whole pipetting operation is completed, and the use is convenient.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A disposable multichannel pipette, includes a plurality of pipettes (4) that are linear equidistance and arrange, its characterized in that: the device also comprises a plurality of communicating pipes (3) communicated with the tops of the suction pipes (4), air pipes (2) communicated with the communicating pipes (3), and elastic air bags (1) communicated with the air pipes (2) and far away from one ends of the communicating pipes (3).

2. A disposable multichannel pipette as defined in claim 1 wherein: the utility model provides a one-way air intake valve, including connecting pipe (3), air pipe (2) including with fixed part (6) that link to each other communicating pipe (3), with be rotation portion (7) that are connected between elastic air bag (1) and fixed part (6), rotation portion (7) with be equipped with axial connecting piece (8) between fixed part (6), be equipped with first baffle (14) in fixed part (6), first baffle (14) are with fixed part (6) internal separation formation first passageway (15) and second passageway (16), the one end that rotation portion (7) was kept away from in first passageway (15) is the closed setting, just inlet port (17) that are linked to outside are seted up to first passageway (15) lateral wall, be equipped with second baffle (18) in rotation portion (7), second baffle (18) are with rotation portion (7) internal separation formation third passageway (19) and fourth passageway (20), third passageway (19) with be equipped with first one-way air intake valve (21) and second one-way air intake valve (22) and one-way air intake valve (22) opposite direction.

3. A disposable multichannel pipette as defined in claim 2 wherein: one end of the rotating part (7) far away from the elastic air bag (1) is fixedly connected with a sealing plate (23) for sealing the third channel (19) and the fourth channel (20), the bottom of the second partition plate (18) is fixedly connected with the sealing plate (23), and the sealing plate (23) is provided with a first through hole (24) and a second through hole (25) which are respectively communicated with the third channel (19) and the fourth channel (20).

4. A disposable multichannel pipette as defined in claim 2 wherein: the first one-way air inlet valve (21) and the second one-way air inlet valve (22) are of duckbill valve type structures.

5. A disposable multichannel pipette as defined in claim 2 wherein: the axial connecting piece (8) comprises a first fixed ring (9) fixedly connected to the end face of the fixed part (6) and extending around the circumference of the fixed ring, a second fixed ring (10) fixedly connected to the end face of the rotating part (7) and extending around the circumference of the fixed ring, a first limiting ring (11) fixedly connected to the outer wall of the first fixed ring (9), and a second limiting ring (12) fixedly connected to the inner wall of the second fixed ring (10), wherein the second fixed ring (10) is sleeved outside the first fixed ring (9), and the second limiting ring (12) is clamped between the first limiting ring (11) and the fixed part (6).

6. A disposable multichannel pipette as defined in claim 5 wherein: the outer wall of the first fixed ring (9) is fixedly connected with a sealing ring (13), the sealing ring (13) is positioned between the first limiting ring (11) and the second limiting ring (12), and the outer edge of the sealing ring (13) is elastically abutted to the inner wall of the second fixed ring (10).

7. A disposable multichannel pipette as defined in claim 1 wherein: the outer wall of the suction pipe (4) is provided with scale marks (5) which are arranged along the length direction of the suction pipe.

8. A disposable multichannel pipette as defined in claim 2 wherein: friction lines are arranged on the outer wall of the rotating part (7).