A liquid transfer device

Abstract

The liquid transfer device of this invention includes at least a mounting plate, a liquid aspiration and dispensing device, and a driving mechanism. The liquid aspiration and dispensing device includes at least a needle mounted on the mounting plate with its end extending perpendicular to the mounting plate, and a liquid pump connected to the needle. The liquid pump is used for aspirating and dispensing liquid through the needle. The output end of the driving mechanism is connected to the mounting plate and is used to drive the mounting plate to move, thereby moving the needle. This invention has the advantages of enabling sample aspiration and dispensing operations through the driving mechanism, eliminating the need for manual tube-by-tube operation, reducing the probability of cross-contamination due to human factors, improving the authenticity and reliability of test data, and simultaneously reducing operation time and improving the efficiency of sample transfer.

Description

Technical Field

[0001] This utility model relates to the field of food safety testing technology, specifically to a liquid transfer device. Background Technology

[0002] Food safety testing technology, as a core means of ensuring food quality and safety, relies on quantitative or qualitative analysis methods to systematically screen for potentially harmful substances, environmental pollutants, and pathogenic microorganisms in food. Its goal is to achieve quality and safety control throughout the entire food supply chain, from production to consumption. However, the current technological system of food safety testing equipment still has significant shortcomings, and these technical deficiencies have become key bottlenecks restricting testing efficiency and accuracy.

[0003] In the actual operation of food testing, a large number of samples need to be soaked in solution to complete the pretreatment process. Currently, the sample addition and aspiration still rely on operators manually using Pasteur pipettes. This traditional manual operation mode has two drawbacks: first, the manual addition and aspiration of sample solution tube by tube leads to low overall testing efficiency, making it difficult to meet the needs of large-scale screening; second, when transferring sample solvent by manually squeezing the pipette, cross-contamination is easily caused by contact during operation, resulting in distorted test data. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a liquid transfer device that can realize the aspiration and dripping of the sample to be tested through a driving mechanism, without the need for manual tube-by-tube operation, reducing the probability of cross-contamination caused by human factors, improving the authenticity and reliability of the test data, and at the same time reducing the operation time and improving the transfer efficiency of the sample to be tested.

[0005] To solve the above-mentioned technical problems, the present invention provides a liquid transfer device, comprising at least:

[0006] Mounting plate;

[0007] A liquid suction and drainage device, comprising at least a needle tube mounted on the mounting plate and extending at its end in a direction perpendicular to the mounting plate, and a liquid pump connected to the needle tube, the liquid pump being used to suction and drain liquid through the needle tube;

[0008] A drive mechanism, the output end of which is connected to the mounting plate, is used to drive the mounting plate to move, thereby moving the needle tube.

[0009] In a preferred embodiment, one end of the needle tube is provided with a connector, and the other end passes through the mounting plate and extends in a direction perpendicular to the lower end face of the mounting plate. The needle tube is fixedly connected to the mounting plate through the connector.

[0010] In a preferred embodiment, the liquid suction and discharge device further includes a suction tube, one end of which is connected to the end of the needle tube near the connector, and the other end is connected to an output end of the liquid pump.

[0011] In a preferred embodiment, the driving mechanism includes at least a first driving mechanism;

[0012] The first driving mechanism includes a mounting base, a guide rail mounted on the mounting base and arranged parallel to the extension direction of the needle tube, a slider adapted to the guide rail, and a first driving element;

[0013] The slider is fixedly connected to the side of the mounting plate away from the needle tube. The output end of the first driving element is connected to the slider and is used to drive the slider to slide relative to the guide rail, thereby causing the mounting plate to move linearly along the extension direction of the needle tube.

[0014] In a preferred embodiment, the first drive mechanism further includes a lead screw that is axially parallel to the guide rail, one end of the lead screw being rotatably connected to the mounting base, and the other end passing through the slider and connected to the output end of the first drive element;

[0015] The first driving element is used to drive the lead screw to rotate relative to the mounting base, thereby causing the slider to slide relative to the guide rail.

[0016] In a preferred embodiment, the driving mechanism further includes a second driving mechanism;

[0017] The second drive mechanism includes at least a transition flange fixedly connected to the mounting base and a second drive element. The rotation center axis of the transition flange is arranged parallel to the axial direction of the guide rail. The second drive element is used to drive the transition flange to rotate, thereby causing the mounting base to rotate around the rotation center axis of the transition flange.

[0018] In a preferred embodiment, a cleaning device is also included;

[0019] The cleaning device includes at least a cleaning tank for cleaning the syringe, a water inlet pipe, and a second liquid pump. One end of the water inlet pipe is connected to the inner cavity of the cleaning tank, and the other end is connected to the output end of the second liquid pump. The second liquid pump is used to add cleaning fluid into the cleaning tank through the water inlet pipe.

[0020] In a preferred embodiment, a solenoid valve is installed at the bottom of the cleaning tank, and the solenoid valve is used to empty the cleaning fluid in the cleaning tank after the syringe is cleaned.

[0021] In a preferred embodiment, the cleaning device further includes a water outlet pipe connected to the inner cavity of the cleaning tub.

[0022] In a preferred embodiment, the cleaning apparatus further includes a mounting bracket for mounting the cleaning tub.

[0023] Compared with the prior art, the liquid transfer device of this invention has the following advantages:

[0024] (1) The liquid transfer device of this utility model includes at least a mounting plate, a liquid aspiration and dissipation device, and a driving mechanism. The liquid aspiration and dissipation device includes a needle tube mounted on the mounting plate with its end extending perpendicular to the mounting plate. The vertically extending needle tube layout allows for precise insertion into the bottom of the sample container, avoiding liquid residue or air bubble interference. The liquid aspiration and dissipation device also includes a liquid pump connected to the needle tube, which is used for aspiration and dissipation through the needle tube. Through the coordinated work of the liquid pump and the needle tube, the aspiration and dispensing of the sample to be tested are realized. On the one hand, the micro-level liquid transfer is realized through the pump body (such as an injection pump or a peristaltic pump); on the other hand, the operation time is reduced and the efficiency of sample transfer is improved. The output end of the driving mechanism is connected to the mounting plate and is used to drive the mounting plate to move, thereby driving the needle tube to move. It can accurately move the needle tube to different sample containers or detection plate holes, reducing manual intervention. At the same time, the adjustable descent speed and depth prevent the needle tube from colliding with the bottom of the container and causing damage. There is no need for manual tube-by-tube operation, reducing the probability of cross-contamination caused by human factors and improving the authenticity and reliability of the detection data.

[0025] (2) The liquid transfer device of this utility model also includes a cleaning device. The cleaning device includes at least a cleaning tank for cleaning the syringe, a water inlet pipe, and a second liquid pump. One end of the water inlet pipe is connected to the inner cavity of the cleaning tank, and the other end is connected to the output end of the second liquid pump. The second liquid pump is used to add cleaning solution to the cleaning tank through the water inlet pipe. The second liquid pump adds cleaning solution to the cleaning tank through the water inlet pipe, and the driving mechanism drives the syringe to extend into the cleaning tank and immerse it in the cleaning solution for simultaneous cleaning of the inner and outer walls. With this structural design, the syringe can be cleaned after each transfer, ensuring no residue between different samples and avoiding cross-contamination and residual interference during the transfer of different test samples. At the same time, the syringe can be reused, reducing the detection cost. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the liquid transfer device of this utility model;

[0027] Figure 2 This is a schematic diagram of the drive mechanism structure of an embodiment of the liquid transfer device of this utility model;

[0028] Figure 3 This is a schematic diagram of the cleaning device structure of an embodiment of the liquid transfer device of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Mounting plate;

[0031] 2-Liquid suction / discharge device; 21-Needle; 211-Connector; 22-Liquid pump one; 23-Liquid suction tube;

[0032] 3-Drive mechanism; 31-First drive mechanism; 311-Mounting base; 312-Guide rail; 313-Slider; 314-First drive element; 315-Lead screw; 32-Second drive mechanism; 321-Conversion flange; 322-Second drive element;

[0033] 4-Cleaning device; 41-Cleaning tank; 411-Electromagnetic pump; 42-Inlet pipe; 43-Liquid pump II; 44-Outlet pipe; 45-Mounting bracket. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] This embodiment provides a liquid transfer device, such as... Figure 1 As shown, it includes at least a mounting plate 1, a liquid suction and discharge device 2, a drive mechanism 3, and a cleaning device 4.

[0038] The washing and draining device 2 includes at least a needle 21 mounted on the mounting plate 1 with its end extending perpendicular to the mounting plate. The vertically extending needle layout allows for precise insertion into the bottom of the sample container, avoiding liquid residue or air bubble interference. The washing and draining device 2 also includes a liquid pump 22 connected to the needle, used for aspirating and draining liquid through the needle. Through the coordinated operation of the liquid pump and the needle, the aspiration and addition of the sample to be tested are achieved. On the one hand, the pump (such as a syringe pump or peristaltic pump) enables micro-level liquid transfer; on the other hand, it reduces operation time and improves the efficiency of sample transfer. The output end of the drive mechanism 3 is connected to the mounting plate 1, used to drive the mounting plate to move, thereby moving the needle. It can accurately move the needle to different sample containers or detection plate orifices, reducing manual intervention. The adjustable descent speed and depth prevent the needle from colliding with the bottom of the container and causing damage. It eliminates the need for manual tube-by-tube operation, reducing the probability of cross-contamination due to human factors and improving the authenticity and reliability of the test data.

[0039] like Figure 1 As shown, in this embodiment, one end of the needle tube 21 is provided with a connector 211. During high-throughput rapid movement, the connector can buffer mechanical vibration and prevent droplet splashing or positional deviation caused by loosening of the needle tube. The other end passes through the mounting plate 1 and extends along a direction perpendicular to the lower end face of the mounting plate. The needle tube is fixedly connected to the mounting plate through the connector.

[0040] Preferably, the liquid suction and discharge device further includes a suction tube 23, one end of which is connected to the end of the needle tube 21 near the connector 211, and the other end is connected to the output end of the liquid pump 22.

[0041] like Figure 2 As shown, the drive mechanism 3 includes at least a first drive mechanism 31. The first drive mechanism includes a mounting base 311, a guide rail 312 mounted on the mounting base 311 and parallel to the needle extension direction, a slider 313 adapted to the guide rail, and a first drive element 314. The slider is fixedly connected to the side of the mounting plate away from the needle. The output end of the first drive element is connected to the slider and is used to drive the slider to slide relative to the guide rail, causing the mounting plate to move linearly along the needle extension direction. Through the guiding cooperation of the guide rail and slider structure, the mounting plate and needle move in a linear direction, preventing needle deviation or tilting.

[0042] In this embodiment, the first driving mechanism 31 further includes a lead screw 315 arranged axially parallel to the guide rail 312. One end of the lead screw is rotatably connected to the mounting base, and the other end passes through the slider and is connected to the output end of the first driving element. The first driving element is used to drive the lead screw to rotate relative to the mounting base, thereby causing the slider to slide relative to the guide rail. By introducing a lead screw transmission system based on the guide rail-slider structure, the parallel arrangement of the lead screw and the guide rail forms a dual guiding effect, improving the axial movement accuracy and ensuring the accuracy of needle positioning.

[0043] like Figure 2 As shown, the drive mechanism 3 also includes a second drive mechanism 32, which includes at least a transition flange 321 fixedly connected to the mounting base 311 and a second drive element 322. The rotation center axis of the transition flange 321 is parallel to the axial direction of the guide rail 312. The second drive element is used to drive the transition flange to rotate, thereby causing the mounting base to rotate around the flange's rotation center axis. Through the coordinated work of the first and second drive mechanisms, the entire aspiration and drainage device (including needles, etc.) connected to the mounting base can rotate in the horizontal plane, breaking through the limitations of single linear motion. In practical applications such as food testing, sample containers may be placed at different angles and positions. The needle can be rotated to adjust its direction more flexibly, accurately aiming at the target sample container for aspiration and drainage operations, without the need to manually adjust the position of the sample container, greatly improving the convenience and flexibility of operation. At the same time, it allows the needle to quickly switch to different workstations to operate on multiple samples sequentially.

[0044] like Figure 3 As shown, the cleaning device 4 includes at least a cleaning tank 41 for cleaning the syringe 21, a water inlet pipe 42, and a second liquid pump 43. One end of the water inlet pipe 42 is connected to the inner cavity of the cleaning tank, and the other end is connected to the output end of the second liquid pump. The second liquid pump is used to add cleaning solution to the cleaning tank through the water inlet pipe. The second liquid pump adds cleaning solution to the cleaning tank through the water inlet pipe, and the drive mechanism drives the syringe to extend into the cleaning tank and immerse it in the cleaning solution for simultaneous cleaning of the inner and outer walls. This structural design allows for syringe cleaning after each transfer, ensuring no residue between different samples and avoiding cross-contamination and residual interference during the transfer of different test samples. It also allows for syringe reuse, reducing testing costs.

[0045] Preferably, a solenoid valve 411 is installed at the bottom of the cleaning tank 41. The solenoid valve is used to drain the cleaning fluid in the cleaning tank after the syringe is cleaned.

[0046] In this embodiment, the cleaning device 4 further includes a water outlet pipe 44 that communicates with the inner cavity of the cleaning tank 41. The cleaning device 4 also includes a mounting bracket 45 for mounting the cleaning tank.

[0047] The principle of syringe cleaning in the liquid transfer device of this embodiment is as follows:

[0048] The second drive element 322 of the second drive mechanism 32 drives the conversion flange 321 to rotate around its rotation center axis until the needle 21 of the suction and discharge device 2 is above the cleaning tank 41 of the cleaning device 4. The first drive element 314 of the first drive mechanism 31 drives the lead screw to rotate relative to the mounting base 311, causing the slider 313 to move along the guide rail 312, so that the needle 21 extends into the inner cavity of the cleaning tank.

[0049] The cleaning device 4 adds cleaning solution into the inner cavity of the cleaning tank 41 through liquid pump 43 and water inlet pipe 42 to clean the outer wall of the syringe. Simultaneously, the suction and drainage device 2 draws cleaning solution into the inner cavity of the syringe through liquid pump 22 and washing pipe 23 to clean the inner wall. After cleaning, the suction and drainage device 2 drains the cleaning solution from the inner cavity of the syringe through liquid pump 22 and washing pipe 23.

[0050] The electromagnetic pump 411 of the cleaning device 4 is turned on, and the cleaning liquid in the cleaning tank 41 is discharged from the cleaning tank.

[0051] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid transfer device, characterized in that, At least including: Mounting plate (1); A liquid suction and drainage device (2) includes at least a needle tube (21) mounted on the mounting plate and extending at its end in a direction perpendicular to the mounting plate, and a liquid pump (22) connected to the needle tube, the liquid pump being used to suction and drain liquid through the needle tube; The drive mechanism (3) has its output end connected to the mounting plate and is used to drive the mounting plate to move, thereby moving the needle tube. It also includes a cleaning device (4); The cleaning device includes at least a cleaning tank (41) for cleaning the syringe (21), a water inlet pipe (42) and a second liquid pump (43). One end of the water inlet pipe (42) is connected to the inner cavity of the cleaning tank, and the other end is connected to the output end of the second liquid pump. The second liquid pump is used to add cleaning liquid to the cleaning tank through the water inlet pipe. The driving mechanism (3) includes: a first driving mechanism (31) for driving the mounting plate (1) to move linearly along the extension direction of the needle tube, and a second driving mechanism (32) for driving the first driving mechanism to rotate around the rotation center axis; when the needle tube (21) is moved into the cleaning tank (41) by the driving mechanism (3), the second liquid pump (43) is used to supply cleaning liquid into the cleaning tank (41) to clean the outer wall of the needle tube (21), and the suction and discharge device (2) draws the cleaning liquid from the cleaning tank (41) into the inner cavity of the needle tube through the first liquid pump (22) to clean the inner wall.

2. A liquid transfer device according to claim 1, characterized in that: One end of the needle tube (21) is provided with a connector (211), and the other end passes through the mounting plate (1) and extends along a direction perpendicular to the lower end face of the mounting plate. The needle tube is fixedly connected to the mounting plate through the connector.

3. A liquid transfer device according to claim 2, characterized in that: The liquid suction and discharge device also includes a suction tube (23), one end of which is connected to the end of the needle tube (21) near the connector (211), and the other end is connected to the output end of the liquid pump (22).

4. A liquid transfer device according to any one of claims 1-3, characterized in that: The first driving mechanism includes a mounting base (311), a guide rail (312) mounted on the mounting base (311) and arranged parallel to the extension direction of the needle tube, a slider (313) adapted to the guide rail, and a first driving element (314). The slider is fixedly connected to the side of the mounting plate away from the needle tube, and the output end of the first driving element is connected to the slider to drive the slider to slide relative to the guide rail.

5. A liquid transfer device according to claim 4, characterized in that: The first drive mechanism (31) also includes a lead screw (315) that is axially parallel to the guide rail (312). One end of the lead screw is rotatably connected to the mounting base, and the other end passes through the slider and is connected to the output end of the first drive element. The first driving element is used to drive the lead screw to rotate relative to the mounting base, thereby causing the slider to slide relative to the guide rail.

6. A liquid transfer device according to claim 5, characterized in that: The second drive mechanism includes at least a transition flange (321) fixedly connected to the mounting base (311) and a second drive element (322). The rotation center axis of the transition flange (321) is arranged parallel to the axial direction of the guide rail (312). The second drive element is used to drive the transition flange to rotate, thereby causing the mounting base to rotate around the rotation center axis of the transition flange.

7. A liquid transfer device according to claim 1, characterized in that: A solenoid valve (411) is installed at the bottom of the cleaning tank (41), and the solenoid valve is used to drain the cleaning fluid in the cleaning tank after the needle is cleaned.

8. A liquid transfer device according to claim 7, characterized in that: The cleaning device (4) also includes a water outlet pipe (44) that communicates with the inner cavity of the cleaning tank (41).

9. The liquid transfer apparatus according to claim 7 or 8, characterized in that: The cleaning device (4) also includes a mounting bracket (45) for mounting the cleaning tub.

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