Rail type multi-range automatic pipetting device

Abstract

The utility model relates to a rail-mounted multi-range automatic pipetting device which comprises a base for placing an experimental instrument, a liquid suction assembly, a lifting assembly for driving the liquid suction assembly to move up and down, and a moving assembly arranged on the base and used for driving the lifting assembly and the liquid suction assembly to move in a plane, the liquid suction assembly comprises an outer shell, a connecting pipe vertically penetrating through the outer shell, and a pump body connected with the top of the connecting pipe. The plane positions of the lifting assembly and the liquid suction assembly can be adjusted through the moving assembly, the vertical position of the liquid suction assembly can be adjusted through the lifting assembly, the liquid suction assembly is assisted in completing the operation of clamping and fixing the liquid suction pipe through the position change, the liquid suction and drainage operation is carried out through the liquid suction pipe, and the liquid suction pipe is automatically replaced. The device is simple in structure, high in automation degree, good in repeatability and convenient to control the amount of liquid samples sucked by the pipette every time so as to meet the treatment requirements of different amounts of liquid samples, and the manual workload is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid transfer equipment, and in particular relates to a track-type multi-range automatic liquid transfer device. Background Art

[0002] In the fields of biomedicine, chemical analysis, environmental monitoring, etc., it is often necessary to perform quantitative or qualitative analysis on liquid samples. To achieve this goal, a pipette is usually needed to suck and transfer the liquid samples. The structure of the pipette includes a display window, a capacity adjustment component, a piston, an O-ring, a suction tube and a pipette tip (pipette nozzle). In the prior art, the transfer of liquid samples is mostly done manually with a pipette.

[0003] In the prior art, multiple liquid samples are required for analyzing liquid samples. Different amounts of liquid samples are required based on different analytical experiment requirements and different liquid sample requirements, and multiple liquid samples of the same amount are also required. However, there are many problems in manually operating a pipette to transfer liquid samples under the experimental requirements. Specifically, during the pipetting process, it is necessary to manually replace the pipette tip (pipette nozzle) multiple times and manually adjust the aspiration volume of the pipette multiple times. The degree of automation is low, the operation is cumbersome, and the use is not convenient enough. The workload of pipetting is large. The longer the time, the stronger the fatigue of the staff's arms. In the fatigued state, the accuracy of the pipetting volume will gradually decrease, so that the actual pipetting volume deviates from the set pipetting volume, which in turn affects the experimental results. Therefore, it is of great practical significance to invent a track-type multi-range automatic pipetting device. Utility Model Content

[0004] The purpose of the utility model is to provide a track-type multi-range automatic pipetting device in order to solve the above-mentioned problems, aiming to solve the technical problems in the prior art that it is necessary to manually replace the pipette tip (pipette nozzle) multiple times and manually adjust the aspiration volume of the pipette gun multiple times, the degree of automation is low, the operation is relatively cumbersome, and the use is not convenient; the pipette gun cannot automatically perform the pipetting operation, the repeatability is poor, and as the fatigue of the staff increases, the accuracy of the pipetting volume will gradually decrease, and there is a deviation between the actual pipetting volume and the set pipetting volume, which in turn affects the experimental results.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A track-type multi-range automatic liquid transfer device, comprising a base for placing experimental equipment, a liquid pipetting component, a lifting component for driving the liquid pipetting component to move up and down, and a moving component arranged on the base and used to drive the lifting component and the liquid pipetting component to move in a plane;

[0007] The liquid suction assembly comprises an outer shell, a connecting pipe penetrating the outer shell from top to bottom, and a pump body connected to the top of the connecting pipe, wherein a liquid suction pipe is clamped at the bottom of the connecting pipe;

[0008] The liquid suction component also includes a pushing component which is sleeved on the outside of the connecting tube and is used to push off the outer cylinder of the liquid suction tube and drive the outer cylinder to move up and down.

[0009] As a further optimization scheme of the utility model, the lifting assembly includes a mounting seat, a screw rod rotatably connected to the mounting seat, a nut seat connected to the screw rod through a ball nut pair, a driving member for driving the screw rod to rotate, and a plurality of limit rods arranged on the mounting seat for guiding the nut seat to move up and down, and the nut seat is connected to the outer shell.

[0010] As a further optimization scheme of the utility model, the moving component includes two moving rails symmetrically arranged on the top of the base, two moving seats slidably connected to the two moving rails respectively, a power member 1 that drives the two moving seats 1 to move synchronously, a moving rail 2 arranged between the two moving seats 1 and perpendicular to the moving rail 1, a moving seat 2 slidably connected to the moving rail 2, and a power member 2 that drives the moving seat 2 to move, and the moving seat 2 is connected to the mounting seat.

[0011] As a further optimization scheme of the utility model, the pushing assembly includes two screw rods rotatably connected to the outer shell, two nut seats 2 respectively connected to the two screw rods 2 through ball nut pairs, and two driving parts for driving the screw rods 2 to rotate, and the outer cylinder is connected to the two nut seats 2.

[0012] As a further optimization scheme of the utility model, the experimental apparatus includes a pipette support frame arranged on the top of the base and used to vertically place a plurality of pipettes, a sub-filling bottle support frame arranged on the top of the base, a plurality of sub-filling bottles vertically snapped into the sub-filling bottle support frame, a plurality of storage bottles arranged on the top of the base, and a pipette recovery trough arranged on the top of the base.

[0013] The beneficial effects of the utility model are:

[0014] 1) The utility model can adjust the plane position of the lifting component and the liquid pipetting component through the moving component, and can adjust the upper and lower positions of the liquid pipetting component through the lifting component. Through the position change, the liquid pipetting component is assisted to complete the operation of clamping and fixing the liquid pipette, the operation of liquid pipetting and liquid discharge through the liquid pipette, and the operation of automatically replacing the liquid pipette. It has a high degree of automation and good repeatability. It is also convenient to control the amount of liquid sample sucked by the liquid pipette each time to meet the processing requirements of different amounts of liquid samples, and greatly reduces the manual workload;

[0015] 2) The utility model uses a disposable pipette to aspirate and discharge liquid. In order to avoid cross contamination of liquid samples, after the disposable pipette is used, the outer tube can be driven downward by a pushing component to push the pipette connected to the connecting tube to detach from the connecting tube. There is no need to manually replace the pipette, the degree of automation is high, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a partial structural schematic diagram of the lifting component and the liquid suction component of the utility model.

[0018] In the figure: 1. base; 2. moving track 1; 21. moving seat 1; 3. moving track 2; 31. moving seat 2; 4. mounting seat; 5. screw rod 1; 6. nut seat 1; 7. driving member 1; 8. pipetting assembly; 81. outer shell; 82. connecting pipe; 83. pump body; 84. screw rod 2; 85. nut seat 2; 86. outer cylinder; 87. driving member 2; 9. pipette support frame; 10. pipette; 11. storage bottle; 12. sub-filling bottle support frame; 13. sub-filling bottle; 14. pipette recovery tank. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] like Figure 1-2 As shown, a track-type multi-range automatic pipetting device includes a base 1 for placing experimental equipment, a liquid pipetting component 8, a lifting component for driving the liquid pipetting component 8 to move up and down, and a moving component arranged on the base 1 and used to drive the lifting component and the liquid pipetting component 8 to move in a plane;

[0021] The liquid suction assembly 8 comprises an outer shell 81, a connecting pipe 82 penetrating the outer shell 81 from top to bottom, and a pump body 83 connected to the top of the connecting pipe 82, and a liquid suction pipe 10 is clamped at the bottom of the connecting pipe 82;

[0022] The liquid pipetting assembly 8 further comprises a pushing assembly which is sleeved on the outside of the connecting tube 82 and is used to push off the outer tube 86 of the liquid pipetting tube 10 and drive the outer tube 86 to move up and down.

[0023] It should be noted that, in this embodiment, in order to avoid cross contamination between liquid samples or different liquids, the pipette 10 can be used as a disposable tool and replaced before each liquid sample or different liquid is sucked;

[0024] In this embodiment, the operation of the pump body 83 is controlled to control the amount of liquid sample sucked and discharged by the pipette 10 each time, thereby meeting the processing requirements of multiple liquid samples of different amounts.

[0025] Preferably, the lifting assembly includes a mounting seat 4, a screw rod 5 rotatably connected to the mounting seat 4, a nut seat 6 connected to the screw rod 5 through a ball nut pair, a driving member 7 for driving the screw rod 5 to rotate, and a plurality of limit rods provided on the mounting seat 4 for guiding the nut seat 6 to move up and down, and the nut seat 6 is connected to the outer shell 81.

[0026] Preferably, the moving assembly includes two moving rails 2 symmetrically arranged on the top of the base 1, two moving seats 21 respectively slidably connected to the two moving rails 2, a power member 1 driving the two moving seats 21 to move synchronously, a moving rail 2 3 arranged between the two moving seats 21 and perpendicular to the moving rail 2, a moving seat 2 31 slidably connected to the moving rail 2 3, and a power member 2 driving the moving seat 2 31 to move, and the moving seat 2 31 is connected to the mounting seat 4.

[0027] It should be noted that, in this embodiment, the power member 1 includes a driving shaft 1 and a driven shaft 1 rotatably connected to the two moving tracks 1 2, and an electric motor 1 driving the driving shaft 1 to rotate. A conveyor belt 1 is provided between the driving shaft 1 and the driven shaft 1 on the moving track 1 2, and the moving seat 1 21 is connected and fixed to the conveyor belt 1.

[0028] The power member 2 includes a driving shaft 2 and a driven shaft 2 that are rotatably connected to the moving track 2 3, and an electric motor 2 that drives the driving shaft 2 to rotate. A conveyor belt 2 is provided between the driving shaft 2 and the driven shaft 2 on the moving track 2 3, and the moving seat 2 31 is fixedly connected to the conveyor belt 2.

[0029] The plane positions of the lifting assembly and the liquid suction assembly 8 are adjusted by controlling the electric motor 1 and the electric motor 2 to rotate forward and reverse to drive the conveyor belt 1 and the conveyor belt 2 to convey.

[0030] Preferably, the pushing assembly includes two screw rods 84 rotatably connected to the outer shell 81, two nut seats 85 respectively connected to the two screw rods 84 through ball nut pairs, and a driving member 87 driving the screw rods 84 to rotate, and the outer cylinder 86 is connected to the two nut seats 85.

[0031] It should be noted that, in this embodiment, the driving member 1 7 and the driving member 2 87 are both servo motors.

[0032] Furthermore, the liquid pipetting component 8 is provided with a position sensor for detecting the position of the liquid pipetting component 8, and the position sensor is any one of a photoelectric sensor and a Hall sensor.

[0033] In this embodiment, the experimental apparatus includes a pipette support frame 9 arranged on the top of the base 1 and used to vertically place a plurality of pipettes 10, a sub-filling bottle support frame 12 arranged on the top of the base 1, a plurality of sub-filling bottles 13 vertically snapped into the sub-filling bottle support frame 12, a plurality of storage bottles 11 arranged on the top of the base 1, and a pipette recovery trough 14 arranged on the top of the base 1.

[0034] When performing the pipetting operation, the liquid sample in the storage bottle 11 is dispensed into different dispensing bottles 13. The specific operation steps are as follows:

[0035] The plane positions of the lifting assembly and the liquid pipetting assembly 8 are adjusted by controlling the operation of the electric motor 1 and the electric motor 2. At this time, it is necessary to adjust the connection tube 82 to align with one of the liquid pipetting tubes 10 on the liquid pipetting tube support frame 9, and then control the operation of the driving member 7. The driving member 7 drives the screw rod 5 to rotate, so that the nut seat 6 drives the liquid pipetting assembly 8 to move down along the screw rod 5, so that one of the liquid pipetting tubes 10 is clamped on the connecting tube 82, and then the driving member 7 drives the screw rod 5 to rotate, so that the nut seat 6 drives the liquid pipetting assembly 8 to move up along the screw rod 5, so as to avoid the experimental equipment on the top of the base 1 from blocking the liquid pipetting tube 10 during the movement;

[0036] The plane positions of the lifting assembly and the liquid suction assembly 8 are adjusted by controlling the operation of the electric motor 1 and the electric motor 2. At this time, the liquid suction tube 10 connected to the connecting tube 82 needs to be adjusted to align with the storage bottle 11 containing the liquid sample to be taken. The driving member 17 works to move the liquid suction tube 10 downward to extend into the storage bottle 11. The liquid sample is sucked through the liquid suction tube 10 by controlling the operation of the pump body 83. The driving member 17 works to move the liquid suction tube 10 upward to leave the storage bottle 11.

[0037] By controlling the operation of the electric motor 1 and the electric motor 2 to adjust the plane position of the lifting assembly and the liquid pipetting assembly 8, it is necessary to adjust the liquid pipette 10 with the liquid sample to align with one of the empty sub-filling bottles 13, and by controlling the operation of the pump body 83, the liquid sample sucked by the liquid pipette 10 is discharged and falls into the inside of the sub-filling bottle 13, and then the driving member 17 drives the screw rod 15 to rotate so that the nut seat 16 drives the liquid pipetting assembly 8 to move up along the screw rod 15;

[0038] By controlling the operation of the electric motor 1 and the electric motor 2 to adjust the plane position of the lifting assembly and the pipette assembly 8, it is necessary to adjust the pipette 10 for discharging the liquid sample to be located above the pipette recovery tank 14. By controlling the operation of the driving member 2 87, the driving member 2 87 drives the screw rod 2 84 to rotate. The rotation of the screw rod 2 84 causes the nut seat 2 85 to move down along the screw rod 2 84 with the outer cylinder 86, so that the pipette 10 clamped on the connecting tube 82 is pushed down by the outer cylinder 86 to detach from the connecting tube 82 and fall into the pipette recovery tank 14. The driving member 2 87 drives the screw rod 2 84 to rotate to move the outer cylinder 86 upward to restore to the initial height.

[0039] Then, a new, clean pipette 10 can be reconnected to perform the next pipetting operation.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A track-type multi-range automatic liquid transfer device, characterized in that: It comprises a base (1) for placing experimental equipment, a liquid suction component (8), a lifting component for driving the liquid suction component (8) to move up and down, and a moving component arranged on the base (1) and used to drive the lifting component and the liquid suction component (8) to move in a plane; The liquid suction component (8) comprises an outer shell (81), a connecting pipe (82) penetrating the outer shell (81) from top to bottom, and a pump body (83) connected to the top of the connecting pipe (82); a liquid suction pipe (10) is clamped at the bottom of the connecting pipe (82); The liquid suction component (8) further comprises an outer cylinder (86) which is sleeved on the outside of the connecting tube (82) and is used to push off the liquid suction tube (10), and a pushing component which drives the outer cylinder (86) to move up and down.

2. The track-type multi-range automatic liquid transfer device according to claim 1, characterized in that: The lifting assembly comprises a mounting seat (4), a screw rod (5) rotatably connected to the mounting seat (4), a nut seat (6) connected to the screw rod (5) via a ball nut pair, a driving member (7) for driving the screw rod (5) to rotate, and a plurality of limit rods arranged on the mounting seat (4) for guiding the nut seat (6) to move up and down, wherein the nut seat (6) is connected to an outer shell (81).

3. The track-type multi-range automatic liquid transfer device according to claim 2, characterized in that: The moving assembly comprises two moving rails (2) symmetrically arranged on the top of the base (1), two moving seats (21) respectively slidably connected to the two moving rails (2), a power member (1) driving the two moving seats (21) to move synchronously, a moving rail (3) arranged between the two moving seats (21) and perpendicular to the moving rail (2), a moving seat (31) slidably connected to the moving rail (3), and a power member (2) driving the moving seat (31) to move, wherein the moving seat (31) is connected to the mounting seat (4).

4. The track-type multi-range automatic liquid transfer device according to claim 1, characterized in that: The pushing assembly comprises two screw rods (84) rotatably connected to the outer shell (81), two nut seats (85) respectively connected to the two screw rods (84) through ball nut pairs, and a driving member (87) for driving the screw rods (84) to rotate. The outer cylinder (86) is connected to the two nut seats (85).

5. The track-type multi-range automatic liquid transfer device according to claim 1, characterized in that: The experimental apparatus comprises a pipette support frame (9) arranged on the top of a base (1) and used to vertically place a plurality of pipettes (10), a sub-filling bottle support frame (12) arranged on the top of the base (1), a plurality of sub-filling bottles (13) vertically clamped into the sub-filling bottle support frame (12), a plurality of storage bottles (11) arranged on the top of the base (1), and a pipette recovery tank (14) arranged on the top of the base (1).

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