Pipettor capable of being automatically cleaned

Abstract

The utility model discloses a pipettor capable of being automatically cleaned. The pipettor comprises a liquid suction assembly and a cleaning assembly, the liquid suction assembly comprises a piston cylinder and a piston block, the piston block is installed in the piston cylinder in an up-down sliding mode, and a closed liquid storage cavity is formed between the piston cylinder and the piston block. The cleaning assembly comprises a liquid supply unit and a pressure regulating valve, the liquid supply unit comprises a liquid supply pipe and a liquid supply valve, a liquid supply opening is formed in the bottom of the side wall of the piston cylinder, one end of the liquid supply valve is communicated with the liquid supply opening, the other end of the liquid supply valve is connected with the liquid supply pipe, an air outlet is formed in the side wall of the piston cylinder, and the pressure regulating valve is connected with the air outlet. The air outlet is located above the liquid supply port, and one end of the pressure regulating valve is communicated with the air outlet.

Description

Technical Field

[0001] The utility model relates to the field of liquid transfer and extraction equipment, in particular to a pipette capable of automatic cleaning. Background Art

[0002] A pipette is a device used to transfer liquid quantitatively. When conducting biological or chemical experiments, a pipette is generally used to absorb a small amount or trace amount of liquid. In the process of biological cell culture, a pipette is usually needed to absorb cell liquid.

[0003] Since pipettes are expensive, they are often reused in practice, that is, the pipettes are cleaned after use and then used again. However, when cleaning the pipette, the experimenter can only simply clean the outside of the pipette. If the inside of the pipette needs to be cleaned, the pipette needs to be placed in the cleaning solution and the pipette cleaning is started. However, this cleaning method requires constant replacement of the cleaning solution, otherwise it is difficult to ensure the cleaning effect. Utility Model Content

[0004] One advantage of the utility model is that it provides a pipette that can be automatically cleaned. The cleaning component can automatically inject cleaning liquid into the liquid aspiration component, and the experimenter is no longer required to replace the cleaning liquid many times, which is easy to operate and labor-saving.

[0005] Another advantage of the present invention is that it provides an automatically cleanable pipette, wherein the driving unit drives the piston block to move up and down several times to repeatedly oscillate the cleaning liquid in the piston cylinder, causing the cleaning liquid to surge up and down to flush the inner wall of the piston cylinder, thereby cleaning the inside of the automatically cleanable pipette.

[0006] Another advantage of the utility model is that it provides an automatically cleanable pipette, wherein the driving unit drives the piston block to move downward to squeeze the cleaning liquid, and the cleaning liquid is squeezed to the outside through the liquid suction port. At the same time, part of the liquid in the liquid suction port and the liquid suction tube is also cleaned to the outside as the cleaning liquid flows outward, and the cleaning process is repeated several times, thereby further improving the cleaning effect of the inside of the automatically cleanable pipette.

[0007] Another advantage of the utility model is that it provides a pipette that can be cleaned automatically, wherein the liquid aspiration component can automatically aspirate the cell medicine solution, and the experimenter no longer needs to aspirate manually, which is easy to operate.

[0008] Another advantage of the utility model is that it provides an automatically cleanable pipette, wherein the pipette has a pointed mouth and a mounting portion, which can facilitate the suction of liquid from a container with a small opening, thereby improving the feasibility and convenience of operation.

[0009] Another advantage of the present invention is that it provides a pipette that can be automatically cleaned, wherein the control component is used to control the operation of the cleaning component and the liquid aspirating component, thereby achieving automatic cleaning and automatic liquid aspirating of the pipette.

[0010] In order to achieve at least one of the above advantages of the present invention, the present invention provides a pipette capable of automatic cleaning, comprising:

[0011] A liquid suction component, the liquid suction component comprises a piston cylinder and a piston block, the piston block is slidably installed in the piston cylinder, and a closed liquid storage chamber is formed between the piston cylinder and the piston block;

[0012] A cleaning component, the cleaning component includes a liquid supply unit and a pressure regulating valve, the liquid supply unit includes a liquid supply pipe and a liquid supply valve, the side wall of the piston cylinder forms a liquid supply port, one end of the liquid supply valve is connected to the liquid supply port, and the other end is connected to the liquid supply pipe, the side wall of the piston cylinder forms an air outlet, the air outlet is located above the liquid supply port, and one end of the pressure regulating valve is connected to the air outlet.

[0013] According to one embodiment of the utility model, a plurality of liquid suction ports are formed at the bottom end of the piston cylinder, and the liquid suction ports are connected to the liquid storage chamber. The liquid suction assembly also includes a plurality of liquid suction valves, and the number of the liquid suction valves and the liquid suction ports is the same. The liquid suction valves are installed at the liquid suction ports, and the liquid suction valves are used to control the opening and closing of the liquid suction ports.

[0014] According to an embodiment of the utility model, the liquid suction component further includes a plurality of liquid suction tubes, the number of the liquid suction tubes is the same as the number of the liquid suction ports, and the liquid suction tubes are detachably mounted on the liquid suction ports.

[0015] According to an embodiment of the present invention, the liquid suction tube has a pointed mouth portion and a mounting portion, and the mounting portion is detachably mounted on the liquid suction port.

[0016] According to an embodiment of the utility model, the cleaning assembly further includes a water tank having two connecting ports distributed up and down, and the other end of the liquid supply pipe is connected to the connecting port on the lower side.

[0017] According to an embodiment of the present invention, the automatic-cleaning pipette further comprises a gripping portion, wherein the gripping portion is formed by extending the piston cylinder in a direction away from the piston block, and the gripping portion has a mounting cavity.

[0018] According to one embodiment of the utility model, the liquid suction component also includes a driving unit, and the driving unit is used for the piston block to move up and down in the piston cylinder. The driving unit is arranged in the mounting cavity of the holding part, and the driving unit includes a motor, a ball screw and a screw mother block. The motor is fixed to the top of the mounting cavity, the ball screw is connected to the output end of the motor, and the screw mother block is installed on the holding part so as to slide up and down. One end of the screw mother block is threadedly connected to the ball screw, and the other end is connected to the piston block.

[0019] According to one embodiment of the utility model, the ball screw has a smooth portion and a threaded portion, the screw nut is connected to the threaded portion of the ball screw, and the drive unit also includes a bearing, which is sleeved on the smooth portion of the ball screw, and the bearing is installed between the inner wall of the installation cavity and the smooth portion of the ball screw.

[0020] According to one embodiment of the utility model, the automatically cleaning pipette also includes a control component, which is arranged at one end of the gripping portion away from the liquid suction component, and the control component includes a control body, a drive switch and a plurality of control valve switches, and the drive switch and the plurality of control valve switches are arranged on the control body, the drive switch is electrically connected to the drive unit and is used to control the opening and closing of the motor, and the plurality of control valve switches are connected one by one to the liquid suction valve, the liquid supply valve and the air outlet valve and are used to control the opening and closing.

[0021] According to one embodiment of the utility model, the automatically cleanable pipette also includes at least one power supply, and the liquid suction valve, the drive unit, the liquid supply valve and the air outlet valve are all electrically connected to the power supply, and the power supply provides power to the drive unit and the liquid suction valve, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric drawing of the utility model.

[0023] Figure 2 It is a full-section main axonometric drawing of the utility model.

[0024] 10. Liquid aspiration component;

[0025] 11. Piston cylinder;

[0026] 1101, liquid supply port;

[0027] 1102, air outlet;

[0028] 1103, liquid suction port;

[0029] 12. Piston block;

[0030] 101, liquid storage chamber;

[0031] 13. Pipette;

[0032] 131. Pointed mouth;

[0033] 132. Installation department;

[0034] 14. Suction valve;

[0035] 15. Drive unit;

[0036] 151. Motor;

[0037] 152. Ball screw;

[0038] 1521, smooth part;

[0039] 1522, threaded portion;

[0040] 153, lead screw master block;

[0041] 154. Bearings;

[0042] 20. Cleaning components;

[0043] 21. Liquid supply unit;

[0044] 211, liquid supply pipe;

[0045] 212, liquid supply valve;

[0046] 22. Pressure regulating valve;

[0047] 23. Water tank;

[0048] 2301, connection port;

[0049] 231, intake valve;

[0050] 30. Grip;

[0051] 301, installation cavity;

[0052] 40. Control components;

[0053] 41. Control the main body;

[0054] 42. Drive switch;

[0055] 43. Control valve switch;

[0056] 44. Display screen;

[0057] 50. Power supply parts. DETAILED DESCRIPTION

[0058] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0059] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0060] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] According to the attached Figure 1 To Attachment Figure 2 As shown, an automatic cleaning pipette according to a preferred embodiment of the present invention will be described in detail below, wherein the automatic cleaning pipette includes a liquid pipetting component 10 and a cleaning component 20.

[0063] Specifically, the liquid aspiration component 10 is used to aspirate external cell medicine into the interior thereof, and the cleaning component 20 is disposed in the liquid aspiration component 10 and is used to clean the interior of the liquid aspiration component 10 .

[0064] Specifically, the liquid pipetting assembly 10 includes a piston cylinder 11 and a piston block 12 . The piston block 12 is slidably installed in the piston cylinder 11 . A closed liquid storage chamber 101 is formed between the piston cylinder 11 and the piston block 12 .

[0065] Specifically, a gas outlet 1102 is formed on the side wall of the piston cylinder 11 , and the gas outlet 1102 is located above the liquid supply port 1101 . One end of the pressure regulating valve 22 is connected to the gas outlet 1102 .

[0066] Specifically, a plurality of liquid suction ports 1103 are formed at the bottom end of the piston cylinder 11, and the liquid suction ports 1103 are connected to the liquid storage chamber 101. The liquid suction assembly 10 also includes a plurality of liquid suction valves 14, and the number of the liquid suction valves 14 and the liquid suction ports 1103 are the same. The liquid suction valves 14 are installed at the liquid suction ports 1103, and the liquid suction valves 14 are used to control the opening and closing of the liquid suction ports 1103.

[0067] Preferably, the pipette assembly 10 further comprises a plurality of pipettes 13, the number of the pipettes 13 and the number of the pipette ports 1103 being the same, and the pipettes 13 are detachably mounted on the pipette ports 1103. It can be appreciated by those skilled in the art that the pipettes 13 are detachably connected to the pipette ports 1103, and the staff can replace the pipettes 13 of different sizes or replace the damaged pipettes 13, which not only improves the applicability of the pipette that can be automatically cleaned, but also improves the economy of the pipette that can be automatically cleaned.

[0068] Further preferably, the pipette 13 has a pointed mouth 131 and a mounting portion 132, and the mounting portion 132 is detachably mounted on the pipette port 1103. It can be understood by those skilled in the art that the pointed mouth 131 of the pipette 13 can facilitate the suction of liquid from a container with a smaller opening, thereby improving the feasibility and convenience of operation.

[0069] Specifically, the cleaning component 20 includes a liquid supply unit 21 and a pressure regulating valve 22. The liquid supply unit 21 is used to inject cleaning liquid into the liquid absorption component 10, and the pressure regulating valve 22 is used to adjust the air pressure inside the liquid absorption component 10 so that the liquid supply unit 21 can quickly inject cleaning liquid into the liquid absorption component 10.

[0070] Specifically, the liquid supply unit 21 includes a liquid supply pipe 211 and a liquid supply valve 212 . The side wall of the piston cylinder 11 forms a liquid supply port 1101 . One end of the liquid supply valve 212 is connected to the liquid supply port 1101 , and the other end is connected to the liquid supply pipe 211 .

[0071] It can be understood by those skilled in the art that when the transferred liquid is sucked into the liquid storage chamber 101 through the suction tube 13, the pressure regulating valve 22 and the liquid supply valve 212 are both in a closed state, thereby disconnecting the pressure regulating valve 22 and the liquid supply tube 211 from the outside world, and the suction valve 14 is in an open state. When it is necessary to inject cleaning liquid into the liquid storage chamber 101 for cleaning, the liquid suction valve 14 is in a closed state, and the liquid supply valve 212 and the pressure regulating valve 22 are both in an open state, so that the liquid storage chamber 101 is connected to the outside through the pressure regulating valve 22, thereby avoiding the situation that the cleaning liquid is difficult to be injected into the liquid storage chamber 101 due to the difference between the air pressure in the liquid storage chamber 101 and the external atmospheric pressure. When it is necessary to discharge the cleaning liquid after cleaning from the liquid storage chamber 101, the liquid supply valve 212 and the pressure regulating valve 22 are both in a closed state, and the liquid suction valve 14 is in an open state. At this time, as the piston block 12 moves downward in the piston cylinder 11, the cleaning liquid is squeezed to the outside through the liquid suction port 1103. At the same time, part of the liquid in the liquid suction port 1103 and the pipette 13 is also cleaned to the outside as the cleaning liquid is discharged, thereby completing the cleaning of the inside of the automatically cleanable pipette.

[0072] Preferably, the cleaning assembly 20 further includes a water tank 23, the water tank 23 having two upper and lower connection ports 2301, and the other end of the liquid supply pipe 211 is connected to the lower connection port 2301. It can be understood by those skilled in the art that by injecting a large amount of cleaning liquid into the water tank 23 in advance, the staff does not need to repeatedly add cleaning liquid in the subsequent cleaning process, thereby reducing the workload of the staff.

[0073] Further preferably, the upper connection port 2301 is provided with an air intake valve 231. Those skilled in the art will appreciate that the air intake valve 231 can be in an open state when the cleaning fluid in the water tank 23 is sucked into the piston cylinder 11, thereby adjusting the air pressure in the water tank 23 so that the cleaning fluid in the water tank 23 can smoothly enter the piston cylinder 11.

[0074] Preferably, the automatic-cleaning pipette further comprises a gripping portion 30, the gripping portion 30 being formed by the piston cylinder 11 extending in a direction away from the piston block 12, and the gripping portion 30 having a mounting cavity 301. It can be understood by those skilled in the art that the gripping portion 30 can facilitate the staff to hold the automatic-cleaning pipette, thereby preventing the automatic-cleaning pipette from falling off from the hands of the staff.

[0075] Preferably, the liquid-absorbing component 10 also includes a driving unit 15, which is used to drive the piston block 12 to move up and down in the piston cylinder 11. The driving unit 15 is arranged in the mounting cavity 301 of the holding portion 30. The driving unit 15 includes a motor 151, a ball screw 152 and a screw mother block 153. The motor 151 is fixed to the top of the mounting cavity 301, the ball screw 152 is connected to the output end of the motor 151, and the screw mother block 153 is slidably installed on the holding portion 30 up and down. One end of the screw mother block 153 is threadedly connected to the ball screw 152, and the other end passes through the opening and is connected to the piston block 12.

[0076] Further preferably, the ball screw 152 has a smooth portion 1521 and a threaded portion 1522, the screw mother block 153 is connected to the threaded portion 1522 of the ball screw 152, and the drive unit 15 further includes a bearing 154, the bearing 154 is sleeved on the smooth portion 1521 of the ball screw 152, and the bearing 154 is installed between the inner wall of the installation cavity 301 and the smooth portion 1521 of the ball screw 152. The bearing 154 is used to support the ball screw 152, reduce the friction force when the ball screw 152 rotates, and thereby prevent the bearing 154 from hindering the rotation of the ball screw 152.

[0077] It can be understood by those skilled in the art that the drive unit 15 is used to drive the piston block 12 to move up and down. After the cleaning liquid is injected into the piston cylinder 11 through the liquid supply unit 21, the piston block 12 is repeatedly moved up and down under the drive of the drive unit 15, repeatedly oscillating the cleaning liquid in the piston cylinder 11, so that the cleaning liquid surges up and down, thereby flushing the inner wall of the piston cylinder 11, and then cleaning the inside of the automatically cleanable pipette. When absorbing cell medicine, the piston block 12 moves upward under the action of the drive unit 15, so that negative pressure is formed in the piston cylinder 11, and then the cell medicine is sucked into the piston cylinder 11 through the pipette 13. When the cell medicine needs to be discharged, the piston block 12 moves downward so that the pressure in the liquid storage chamber 101 increases, and then the liquid in the piston cylinder 11 is discharged through the pipette 13, thereby completing the transfer of the liquid.

[0078] Preferably, the driving unit 15 in another embodiment can be implemented as a telescopic cylinder, such as an oil cylinder or a gas cylinder, and the output end of the telescopic cylinder passes through the outlet of the piston cylinder 11 and is directly connected to the piston block 12 to realize the up and down movement of the piston block 12 in the piston cylinder 11.

[0079] Preferably, the automatically cleaning pipette also includes a control component 40, which is arranged at one end of the holding portion 30 away from the pipetting component 10, and the control component 40 includes a control body 41, a drive switch 42 and a plurality of control valve switches 43, the drive switch 42 and the plurality of control valve switches 43 are arranged on the control body 41, the drive switch 42 is electrically connected to the drive unit 15 and is used to control the opening and closing of the motor 151, and the plurality of control valve switches 43 are connected one by one with the pipetting valve 14, the liquid supply valve 212 and the pressure regulating valve 22 and are used to control the opening and closing. In this way, when the operator needs to pipette, he can first open the pipetting valve 14 by operating the control valve switch 43, and after the pointed mouth 131 of the pipette 13 is inserted into the container, he can turn on the driving unit 15 by operating the driving switch 42, thereby driving the pipetting component 10 to complete the pipetting. When the operator completes the pipetting, he can turn off the motor 151 by operating the driving switch 42 to save the power consumption of the automatic cleaning pipette for cell solution.

[0080] Furthermore, the control component 40 also includes a display screen 44 , which is communicatively connected to the control component 40 to display the opening and closing states of the multiple valve bodies controlled by the control valve switch 43 .

[0081] Furthermore, the automatically cleanable pipette also includes at least one power supply 50, and the driving unit 15, the liquid suction valve 14, the liquid supply valve 212 and the pressure regulating valve 22 are all electrically connected to the power supply 50, and the power supply 50 provides power to the driving unit 15 and the liquid suction valve 14, etc.

[0082] In one embodiment, the power supply 50 is implemented as a battery. It can be understood by those skilled in the art that the power supply 50 can also be implemented as a plug connected to an external power source, etc., and power supply is completed by connecting the plug to the external power source, which will not be repeated here.

[0083] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A pipette capable of automatic cleaning, characterized in that: include: A liquid suction component, the liquid suction component comprises a piston cylinder and a piston block, the piston block is slidably installed in the piston cylinder, and a closed liquid storage chamber is formed between the piston cylinder and the piston block; A cleaning component, the cleaning component includes a liquid supply unit and a pressure regulating valve, the liquid supply unit includes a liquid supply pipe and a liquid supply valve, the side wall of the piston cylinder forms a liquid supply port, one end of the liquid supply valve is connected to the liquid supply port, and the other end is connected to the liquid supply pipe, the side wall of the piston cylinder forms an air outlet, the air outlet is located above the liquid supply port, and one end of the pressure regulating valve is connected to the air outlet.

2. The automatic cleaning pipette according to claim 1, characterized in that: A plurality of suction ports are formed at the bottom end of the piston cylinder, and the suction ports are connected to the liquid storage chamber. The suction assembly also includes a plurality of suction valves, and the number of the suction valves and the suction ports is the same. The suction valves are installed at the suction ports, and the suction valves are used to control the opening and closing of the suction ports.

3. The automatic cleaning pipette according to claim 2, characterized in that: The liquid suction component also includes a plurality of liquid suction tubes, the number of the liquid suction tubes is the same as the number of the liquid suction ports, and the liquid suction tubes are detachably mounted on the liquid suction ports.

4. The automatic cleaning pipette according to claim 3, characterized in that: The liquid suction tube has a pointed mouth and a mounting portion, and the mounting portion is detachably mounted on the liquid suction port.

5. The automatic cleaning pipette according to claim 1, characterized in that: The cleaning assembly also includes a water tank having two connecting ports distributed up and down, and the other end of the liquid supply pipe is connected to the connecting port at the lower side.

6. The automatic cleaning pipette according to claim 2, characterized in that: The automatic-cleaning pipette further comprises a gripping portion, which is formed by the piston cylinder extending in a direction away from the piston block, and the gripping portion has a mounting cavity.

7. The automatic cleaning pipette according to claim 6, characterized in that: The liquid suction component also includes a driving unit, which is used for the piston block to move up and down in the piston cylinder. The driving unit is arranged in the installation cavity of the holding part. The driving unit includes a motor, a ball screw and a screw mother block. The motor is fixed to the top of the installation cavity, the ball screw is connected to the output end of the motor, and the screw mother block is installed on the holding part so as to slide up and down. One end of the screw mother block is threadedly connected to the ball screw, and the other end is connected to the piston block.

8. The automatic cleaning pipette according to claim 7, characterized in that: The ball screw has a smooth portion and a threaded portion, the screw nut is connected to the threaded portion of the ball screw, and the drive unit also includes a bearing, the bearing is sleeved on the smooth portion of the ball screw, and the bearing is installed between the inner wall of the installation cavity and the smooth portion of the ball screw.

9. The automatic cleaning pipette according to claim 7, characterized in that: The automatically cleaning pipette also includes a control component, which is arranged at one end of the grip away from the pipetting component. The control component includes a control body, a drive switch and multiple control valve switches. The drive switch and the multiple control valve switches are arranged on the control body. The drive switch is electrically connected to the drive unit and is used to control the opening and closing of the motor. The multiple control valve switches are connected to the pipetting valve, the liquid supply valve and the pressure regulating valve in a one-to-one correspondence and are used to control the opening and closing.

10. The automatic cleaning pipette according to claim 9, characterized in that: The automatically cleanable pipette further comprises at least one power supply, the liquid suction valve, the driving unit, the liquid supply valve and the pressure regulating valve are all electrically connected to the power supply, and the power supply provides power to the driving unit and the liquid suction valve.

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