CN113828369A

CN113828369A - Liquid suction device

Info

Publication number: CN113828369A
Application number: CN202111074932.7A
Authority: CN
Inventors: 宋波; 陈丽娟
Original assignee: Suzhou Huanmei Biomedical Technology Co ltd
Current assignee: Suzhou Huanmei Biomedical Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2021-12-24
Anticipated expiration: 2041-09-14
Also published as: CN113828369B

Abstract

The invention discloses a liquid suction device, and relates to the technical field of liquid suction, in particular to a main frame and a fixed side plate, wherein a connecting rod body is arranged at the upper end inside the main frame, a sealing tank is arranged at one end outside the connecting rod body, a partition plate is arranged outside the sealing tank, a protective batten is arranged outside the partition plate, a middle-placed pipe is arranged at the bottom of the sealing tank in a threaded mode, a first valve is arranged outside the front end of the middle-placed pipe, and guide pipes are arranged at two ends outside the middle-placed pipe. This kind of imbibition device, can usable filling frame inside place the storage bottle in advance after the imbibition finishes and collect, can take out along the horizontal position of external groove after the collection finishes to place the board, thereby can make the board of placing that removes to place inside the mounting groove, and utilize electric putter's design to push down placing the bottle lid in the rubber inslot portion, thereby can make the bottle lid block spacing in the inside of storage bottle, with this can carry out the filling to the liquid after collecting and seal up the deposit.

Description

Liquid suction device

Technical Field

The invention relates to the technical field of imbibition, in particular to an imbibition device.

Background

The liquid suction means that liquid in one container is sucked into the other container, so that a user can conveniently extract the liquid in a non-contact manner, and the liquid suction device is convenient to use in medical medicine, article detection and filling.

The inconvenient liquid after absorbing is collected according to the required filling of using according to the use needs of user in the use of current imbibition device user to and can collect the inconvenient liquid after collecting and retrieve the problem when liquid is more.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a liquid suction device, which solves the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: a liquid suction device comprises a main frame and a fixed side plate, wherein a connecting rod body is arranged at the upper end inside the main frame, a sealing tank is arranged at one end outside the connecting rod body, a partition plate is arranged outside the sealing tank, a protective strip plate is arranged outside the partition plate, a middle-placed pipe is arranged at the bottom of the sealing tank in a threaded mode, a first valve is arranged outside the front end of the middle-placed pipe, guide pipes are arranged at two ends of the outer part of the middle-placed pipe, a stretching pipe is arranged inside the tail end of each guide pipe, a filling frame is arranged outside the bottom of each stretching pipe, a longitudinal pipe is arranged outside the tail end of each middle-placed pipe, a first connecting cavity is arranged outside the bottom of the longitudinal pipe, a rubber barrel cushion is arranged inside the first connecting cavity, a connecting rod is arranged in the middle of the rubber barrel cushion, and a limiting sleeve plate is arranged outside the connecting rod in a sliding mode, the connecting rod is installed in the terminal outside rotation of connecting rod, and the outside of connecting rod rear end is provided with the carousel, fixed curb plate is located the one end of keeping away from the outside of first connecting chamber, the outside of leading pipe front end is provided with the second valve.

Optionally, the top of the inside of the fixed side plate is fixedly provided with a connecting block, the inside of the connecting block is welded with an electric push rod, and the outside of the bottom of the electric push rod is parallel to the outer surface of the filling frame.

Optionally, the inside of filling frame is half hollow structure, and the inside both ends of filling frame all are provided with the mounting groove, external groove is installed to the outside lower extreme of mounting groove, and the inside slip in external groove is provided with places the board.

Optionally, the inside of placing the board is provided with the auxiliary assembly who is used for depositing storage bottle lid, and the auxiliary assembly is including linking up frame and rubber groove, the outside annular of linking up the frame is provided with the rubber groove.

Optionally, a clamping groove is installed in the outer clamping mode at the rear end of the first connecting cavity, an adjusting assembly used for sucking liquid is arranged inside the clamping groove and comprises a built-in piston, a second connecting cavity, a hydraulic air rod and a bottom plate, the hydraulic air rod is arranged outside the bottom of the built-in piston, the bottom plate is fixedly installed outside the bottom of the hydraulic air rod, and the second connecting cavity is arranged outside the built-in piston.

Optionally, the inside of vertical pipe is provided with the third valve, and the third valve is provided with threely, the piece is put to the side is installed to the outside one end of vertical pipe, and the outside rotation of the piece of putting to the side is provided with the connecting axle, the outside mid-mounting of connecting axle has the baffle.

Optionally, the longitudinal pipe is perpendicular to the middle pipe, and the bottom of the longitudinal pipe and the first connecting cavity are in a communicating structure.

Optionally, a connecting disc is arranged in the middle of the outer portion of the bottom of the filling frame, a motor is mounted on the outer portion of the bottom of the connecting disc, and the central axes of the motor, the connecting disc and the filling frame are overlapped.

Optionally, the filling frames are arranged in two groups, and the filling frames are symmetrically distributed about the vertical center line of the middle tube.

Optionally, the top inside the sealed tank is provided with an infrared distance sensor, and a floating plate is installed at the lower end outside the infrared distance sensor.

The invention provides a liquid suction device, which has the following beneficial effects:

can carry out the imbibition processing in different power sources to article to can one of them when the fault appears the other one carry out timely remedy and handle, thereby can keep smooth and easy when the lotion, guarantee the normal operating of imbibition, and can be controlling according to what the lotion is being inhaled the liquid in-process, can carry out reposition of redundant personnel control to the lotion according to the user's needs here simultaneously, be convenient for carry out the filling to the liquid after absorbing and seal up the deposit, convenient to use person carries out unified collection.

1. According to the liquid suction device, through the design of the first connecting cavity and the second connecting cavity, liquid in the sealed tank can be extracted and stored at the same time under negative pressure, and pre-storage treatment can be performed on the extracted liquid by utilizing the hollow structure design of the first connecting cavity and the second connecting cavity after extraction is finished, so that the liquid after internal absorption can be conveniently divided and guided by utilizing the design of the first connecting cavity and the second connecting cavity in the follow-up process;

2. the liquid suction device can collect liquid after liquid suction is finished by placing the storage bottle in the filling frame in advance, the placing plate can be pulled along the horizontal position of the external groove after collection is finished, so that the moving placing plate can be placed in the mounting groove, the bottle cap placed in the rubber groove is pressed down by the design of the electric push rod, the bottle cap can be clamped and limited in the storage bottle, and the collected liquid can be filled and sealed;

3. according to the liquid suction device, the built-in piston in the second connecting cavity can be moved up and down through the interaction of the hydraulic air rod and the bottom plate, liquid in the sealed tank can be sucked into the second connecting cavity under negative pressure through the up-and-down movement of the built-in piston, and when the hydraulic air rod breaks down in the using process, the rubber barrel cushion can be driven to move up and down in the limiting sleeve plate and the first connecting cavity by the aid of the design of the motor, the connecting rod and the rotary disc, so that the liquid in the sealed tank can be sucked under negative pressure, normal work of liquid suction can be guaranteed, and the liquid suction device has an emergency structure;

4. the liquid suction device can be properly adjusted according to the drainage position required by liquid when the liquid in the sealed tank is sucked, the liquid in the sealed tank can be intensively controlled through the first valve inside the middle-placed pipe, and the second valve outside the guide pipe can be rotated when the liquid is drained or the liquid is sucked with higher speed, so that the middle-placed pipe and the guide pipe are in a communicated state, the liquid in the sealed tank can be guided to the interior of a filling frame required to be collected according to the circulation requirement to be collected, the liquid can be collected upwards through the movement of articles inside the connecting cavity when the liquid is sucked to the interior of the connecting cavity under negative pressure, a user can conveniently observe the liquid collection condition inside the connecting cavity from an external scale line visually, or the condition of the water level in the sealed tank can be monitored by the interaction of the infrared distance sensor inside the sealed tank and the floating plate, the structure is simple, the use is convenient for a user, the communication condition between the two connecting cavities can be controlled by utilizing the design of the third valve, the connecting cavities can be conveniently used simultaneously and independently, and the use universality of the whole liquid suction device is effectively improved;

5. this kind of imbibition device, the filling frame can utilize the interact of connection pad and motor to rotate, thereby can carry out the filling to placing in advance at the inside storage bottle of filling frame and handle, can carry out the filling according to the capacity size of different storage bottles simultaneously, it is nimble to use, and can be when collecting to the lotion more, can pull the inside tensile pipe of guide tube, make the liquid in tensile pipe and the storage bottle contact mutually, then can utilize the negative pressure effect to make liquid flow back to original position, realize the remedy to liquid when the imbibition is more.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of a card slot connection structure according to the present invention;

FIG. 3 is a top view of the longitudinal tube of the present invention in expanded configuration;

FIG. 4 is a schematic view of the internal structure of the placement board of the present invention;

FIG. 5 is a schematic view of the internal structure of the sealed tank of the present invention.

In the figure: 1. a main frame; 2. connecting the rod body; 3. sealing the tank; 4. a partition plate; 5. a protective slat; 6. Arranging a pipe in the middle; 7. a first valve; 8. a guide tube; 9. a second valve; 10. a longitudinal tube; 11. a connecting block; 12. an electric push rod; 13. fixing the side plate; 14. stretching the tube; 15. mounting grooves; 16. filling the frame; 17. a connecting disc; 18. a motor; 19. a card slot; 20. a first connection chamber; 21. a rubber barrel cushion; 22. A limiting sleeve plate; 23. a connecting rod; 24. a connecting rod; 25. a turntable; 26. an adjustment assembly; 2601. a piston is arranged inside; 2602. a second connection chamber; 2603. a hydraulic gas lever; 2604. a base plate; 27. a third valve; 28. a baffle plate; 29. a connecting shaft; 30. a side placing block; 31. placing the plate; 32. an external groove; 33. an auxiliary component; 3301. a linking frame; 3302. a rubber groove; 34. an infrared distance sensor; 35. a floating plate.

Detailed Description

Referring to fig. 1 to 5, the present invention provides a technical solution: a liquid suction device comprises a main frame 1, a connecting rod body 2, a sealing tank 3, a partition plate 4, a protective strip plate 5, a middle-placed pipe 6, a first valve 7, a guide pipe 8, a second valve 9, a longitudinal pipe 10, a connecting block 11, an electric push rod 12, a fixed side plate 13, a stretching pipe 14, a mounting groove 15, a filling frame 16, a connecting disc 17, a motor 18, a clamping groove 19, a first connecting cavity 20, a rubber barrel cushion 21, a limiting sleeve plate 22, a connecting rod 23, a connecting rod 24, a rotary disc 25, an adjusting component 26, an internal piston 2601, a second connecting cavity 2602, a hydraulic air rod 2603, a bottom plate 2604, a third valve 27, a baffle plate 28, a connecting shaft 29, a side-placed block 30, a placing plate 31, an external groove 32, an auxiliary component 33, a connecting frame 3301, a rubber groove 3302, an infrared distance sensor 34 and a floating plate 35, wherein the upper end inside the main frame 1 is provided with the connecting rod body 2, and the tank 3 is arranged at one end outside the connecting rod body 2, the outer part of the sealed tank 3 is provided with a partition plate 4, the outer part of the partition plate 4 is provided with a protection slat 5, the bottom of the sealed tank 3 is provided with a middle-placed pipe 6 in a threaded manner, the outer part of the front end of the middle-placed pipe 6 is provided with a first valve 7, both ends of the outer part of the middle-placed pipe 6 are provided with guide pipes 8, the inner part of the tail end of each guide pipe 8 is provided with a stretching pipe 14, the outer part of the bottom of each stretching pipe 14 is provided with a filling frame 16, the inner part of each filling frame 16 is of a semi-hollow structure, both ends of the inner part of each filling frame 16 are provided with mounting grooves 15, the lower end of the outer part of each mounting groove 15 is provided with an outer groove 32, the inner part of each outer groove 32 is provided with a placing plate 31 in a sliding manner, the outer part of the tail end of each longitudinal pipe 6 is provided with a longitudinal pipe 10, the outer part of the bottom of the longitudinal pipe 10 is provided with a first connecting cavity 20, the inner part of the first connecting cavity 20 is provided with a rubber barrel cushion 21, and the middle part of the rubber barrel cushion 21 is provided with a connecting rod 24, a limiting sleeve plate 22 is arranged outside the connecting rod 24 in a sliding mode, a connecting rod 23 is rotatably arranged outside the tail end of the connecting rod 24, a rotary disc 25 is arranged outside the rear end of the connecting rod 23, the fixed side plate 13 is located at one end far away from the outside of the first connecting cavity 20, a connecting block 11 is fixedly arranged on the top of the inside of the fixed side plate 13, an electric push rod 12 is connected to the inside of the connecting block 11 in a welding mode, the outside of the bottom of the electric push rod 12 is parallel to the outer surface of the filling frame 16, and a second valve 9 is arranged outside the front end of the guide pipe 8;

the concrete operation is as follows, can usable filling frame 16 inside place the storage bottle in advance after the imbibition end and collect, can pull along the horizontal position of external groove 32 after the collection end and place board 31, thereby can make the board 31 of placing that removes place inside mounting groove 15, and utilize the design of electronic push rod 12 to push down the bottle lid of placing inside rubber groove 3302, thereby can make the bottle lid block spacing in the inside of storage bottle, with this can carry out the filling and sealing to the liquid after collecting.

As shown in fig. 1 and 4, an auxiliary assembly 33 for storing the caps of the stored bottle bodies is disposed inside the placing plate 31, and the auxiliary assembly 33 includes a joining frame 3301 and a rubber slot 3302, and the rubber slot 3302 is annularly disposed outside the joining frame 3301;

the user can have placed the bottle lid in the inside rubber groove 3302 of auxiliary component 33 to utilize the rubber around the rubber groove 3302 to play limiting displacement to the bottle lid in an instrument, and the design of rubber groove 3302 quantity and position is unanimous with the inside collection bottle of placing of filling frame 16, is convenient for follow-up to the collection bottle seal up the processing.

As shown in fig. 1 and 2, a clamping groove 19 is mounted on the outer portion of the rear end of the first connecting cavity 20 in a clamping manner, an adjusting assembly 26 for sucking liquid is arranged inside the clamping groove 19, the adjusting assembly 26 comprises an internally-arranged piston 2601, a second connecting cavity 2602, a hydraulic air rod 2603 and a bottom plate 2604, the hydraulic air rod 2603 is arranged on the outer portion of the bottom of the internally-arranged piston 2601, the bottom plate 2604 is fixedly mounted on the outer portion of the bottom of the hydraulic air rod 2603, and the second connecting cavity 2602 is arranged on the outer portion of the internally-arranged piston 2601;

can carry out the removal of upper and lower position to built-in piston 2601 inside second connection chamber 2602 through the interact of hydraulic pressure gas pole 2603 and bottom plate 2604, can absorb the inside to second connection chamber 2602 to the inside liquid negative pressure of seal pot 3 through the upper and lower position removal to built-in piston 2601, and can be when hydraulic pressure gas pole 2603 breaks down in the use, usable servo motor, the design of connecting rod 23 and carousel 25 drives the removal that the rubber barrel pad 21 carried out upper and lower position in spacing lagging 22 and first connection chamber 20 inside, thereby can carry out the negative pressure to the inside liquid of seal pot 3 and absorb, can guarantee the normal work of imbibition, have emergent structure.

As shown in fig. 1 and 3, a third valve 27 is arranged inside the longitudinal pipe 10, three third valves 27 are arranged, a side block 30 is mounted at one end outside the longitudinal pipe 10, a connecting shaft 29 is rotatably arranged outside the side block 30, a baffle 28 is mounted in the middle outside the connecting shaft 29, the longitudinal pipe 10 and the middle pipe 6 are perpendicular to each other, and the bottom of the longitudinal pipe 10 is in a communication structure with the first connecting cavity 20;

can be when absorbing the liquid to sealed can 3, can carry out appropriate adjustment according to the required drainage position of liquid, can carry out centralized control to sealed can 3's liquid through to the inside first valve 7 of putting pipe 6 in, and when drainage or imbibition with higher speed are carried out to liquid, can rotate the outside second valve 9 of guiding tube 8, with this can be so that put pipe 6 and guiding tube 8 in the state of intercommunication, thereby liquid in sealed can 3 can be collected to the inside of the required filling frame 16 that collects according to circulation needs guide, and can absorb liquid negative pressure to the removal of connecting the inside article of chamber in the time of connecting the inside of chamber can be to liquid rebound collection, convenient to use person from outside scale line directly perceived to connecting the inside liquid collection condition of chamber and observe, or the interact of the inside infrared distance sensor 34 of usable water level sealed can 3 and floating plate 35 can carry out the condition to sealed can 3 in to the sealed can 3 The control, simple structure, convenient to use person uses to the design of usable third valve 27 can be controlled the intercommunication condition between two connection chambeies, is convenient for use connection chamber simultaneously and independently, effectively increases whole imbibition device's use commonality ability.

As shown in fig. 1, a connecting disc 17 is arranged in the middle of the outer portion of the bottom of the filling frame 16, a motor 18 is mounted on the outer portion of the bottom of the connecting disc 17, the central axes of the motor 18, the connecting disc 17 and the filling frame 16 are coincident, two groups of filling frames 16 are arranged, the filling frames 16 are symmetrically distributed about the vertical central line of the middle-placed pipe 6, two groups of filling frames 16 are arranged, and the filling frames 16 are symmetrically distributed about the vertical central line of the middle-placed pipe 6;

the filling frame 16 can utilize the interact of connection pad 17 and motor 18 to rotate, thereby can carry out the filling processing to placing in advance at the inside storage bottle of filling frame 16, can fill according to the capacity size of different storage bottles simultaneously, it is nimble to use, and can collect when more to the lotion, can pull the tensile pipe 14 of guiding tube 8 inside, make the liquid contact in tensile pipe 14 and the storage bottle, then can utilize the negative pressure effect to make liquid flow back to original position, realize the remedy to liquid when the imbibition is more.

In summary, in the liquid suction device, when in use, firstly, the collecting bottle and the bottle cap can be respectively placed on the filling frame 16 and the rubber groove 3302, then the sealing tank 3 which needs to suck liquid can be installed by utilizing the design of the external thread of the middle tube 6, then when the liquid of the sealing tank 3 is sucked, the sealing tank 3 can be properly adjusted according to the drainage position needed by the liquid, the liquid of the sealing tank 3 can be centrally controlled by the first valve 7 in the middle tube 6, and when the liquid is drained or the liquid is sucked in an accelerating way, the second valve 9 outside the guide tube 8 can be rotated, so that the middle tubes 6 and the guide tube 8 are in a communicated state, the liquid in the sealing tank 3 can be simultaneously sucked and stored under negative pressure by utilizing the design of the hollow structures of the first connecting cavity 20 and the second connecting cavity 2602 after the suction is finished, and the liquid can be sucked by utilizing the design of the hollow structures of the first connecting cavity 20 and the second connecting cavity 2602 The liquid after being sucked is pre-stored, so that the liquid after being sucked in the first connecting cavity 20 and the second connecting cavity 2602 can be conveniently and subsequently guided in a shunting way by utilizing the design of the first connecting cavity 2603 and the second connecting cavity 2602, namely, the built-in piston 2601 in the second connecting cavity 2602 can be moved up and down through the interaction of the hydraulic air rod 2603 and the bottom plate 2604, the liquid in the sealed tank 3 can be sucked into the second connecting cavity 2602 in a negative pressure way by moving the built-in piston 2601 up and down, and when the hydraulic air rod 2603 breaks down in the using process, the rubber barrel cushion 21 can be driven by utilizing the design of the servo motor, the connecting rod 23 and the turntable 25 to move up and down in the limiting sleeve plate 22 and the first connecting cavity 20, so that the liquid in the sealed tank 3 can be sucked in a negative pressure way, and the liquid in the sealed tank 3 can be guided to the interior of the filling frame 16 required to be collected according to the circulation requirement to collect the liquid, and can collect the liquid by moving the articles in the connecting cavity when absorbing the liquid to the inside of the connecting cavity under negative pressure, so that the user can observe the liquid collecting condition in the connecting cavity directly from the external scale mark, or the interaction of the infrared distance sensor 34 and the floating plate 35 in the sealing tank 3 can be used for monitoring the water level condition in the sealing tank 3, the structure is simple, the use is convenient, the communication condition between the two connecting cavities can be controlled by the design of the third valve 27, the connecting cavities can be used simultaneously and independently, the use universality of the whole liquid absorbing device is effectively improved, finally, the filling frame 16 can rotate by the interaction of the connecting disk 17 and the motor 18, thereby the filling treatment can be carried out on the storage bottle which is placed in the filling frame 16 in advance, simultaneously can carry out the filling according to the capacity size of different storage bottles, use in a flexible way to can be collecting when more to the lotion, can pull the tensile pipe 14 of guiding tube 8 inside, make tensile pipe 14 contact with the liquid in the storage bottle, then usable negative pressure effect makes liquid backward flow to original position.

Claims

1. A liquid suction device is characterized by comprising a main frame (1) and a fixed side plate (13), wherein a connecting rod body (2) is arranged at the upper end inside the main frame (1), a sealing tank (3) is installed at one end outside the connecting rod body (2), a partition plate (4) is arranged outside the sealing tank (3), a protective slat (5) is installed outside the partition plate (4), a middle-placed pipe (6) is installed at the bottom of the sealing tank (3) in a threaded mode, a first valve (7) is arranged outside the front end of the middle-placed pipe (6), guide pipes (8) are installed at two ends outside the middle-placed pipe (6), a stretching pipe (14) is arranged inside the tail end of each guide pipe (8), a filling frame (16) is installed outside the bottom of each stretching pipe (14), a longitudinal pipe (10) is arranged outside the tail end of each middle-placed pipe (6), and a first connecting cavity (20) is installed outside the bottom of each longitudinal pipe (10), the inside of first connecting chamber (20) is provided with rubber barrel pad (21), and the mid-mounting of rubber barrel pad (21) has connecting rod (24), the outside of connecting rod (24) slides and is provided with spacing lagging (22), connecting rod (23) are installed in the terminal outside rotation of connecting rod (24), and the outside of connecting rod (23) rear end is provided with carousel (25), fixed curb plate (13) are located the one end of keeping away from first connecting chamber (20) outside, the outside of guiding tube (8) front end is provided with second valve (9).

2. A fluid suction apparatus as set forth in claim 1, wherein the fixed side plate (13) is fixedly provided at the top portion thereof with a connecting block (11), and the connecting block (11) is welded at the inside thereof with an electric push rod (12), and the electric push rod (12) is formed at the bottom portion thereof with the outer surface thereof parallel to the outer surface of the filling frame (16).

3. A fluid suction device as claimed in claim 1, wherein the filling frame (16) is a semi-hollow structure, and both ends of the inside of the filling frame (16) are provided with mounting grooves (15), the lower end of the outside of the mounting groove (15) is provided with an external groove (32), and the inside of the external groove (32) is slidably provided with a placing plate (31).

4. A pipetting device as recited in claim 3 wherein the placement plate (31) is internally provided with an auxiliary unit (33) for storing cap of bottle bodies, and the auxiliary unit (33) comprises a docking rack (3301) and a rubber slot (3302), and the outside of the docking rack (3301) is annularly provided with the rubber slot (3302).

5. The wicking apparatus according to claim 1, wherein a clamping groove (19) is snap-fitted to the outside of the rear end of the first connecting cavity (20), an adjusting component (26) for wicking is disposed inside the clamping groove (19), the adjusting component (26) comprises a built-in piston (2601), a second connecting cavity (2602), a hydraulic air rod (2603) and a bottom plate (2604), the hydraulic air rod (2603) is disposed outside the bottom of the built-in piston (2601), the bottom plate (2604) is fixedly disposed outside the bottom of the hydraulic air rod (2603), and the second connecting cavity (2602) is disposed outside the built-in piston (2601).

6. A pipetting device as recited in claim 1 characterised in that the longitudinal tube (10) is internally provided with a third valve (27) and the third valves (27) are provided in three, that the longitudinal tube (10) is externally provided with a side block (30) at one end and the side block (30) is rotatably provided with a connecting shaft (29) at the outside, and that the connecting shaft (29) is externally provided with a baffle (28) at its middle.

7. A pipetting device as recited in claim 1 characterised in that the longitudinal tube (10) and the centrally disposed tube (6) are perpendicular to each other and that the bottom of the longitudinal tube (10) is in communication with the first chamber (20).

8. A pipetting device as recited in claim 1 characterised in that the bottom outer part of the filling frame (16) is provided with a connecting plate (17) in the middle, and the bottom outer part of the connecting plate (17) is provided with a motor (18), the connecting plate (17) and the filling frame (16) having their central axes coincident.

9. A pipetting device as recited in claim 1 characterised in that the filling frames (16) are arranged in two groups and that the filling frames (16) are arranged symmetrically about the vertical centre line of the centertube (6).

10. A pipetting device as recited in claim 1 characterised in that the top inside the sealed tank (3) is provided with an infrared distance sensor (34) and the lower end outside the infrared distance sensor (34) is fitted with a float plate (35).