Accessory capable of enabling small pipetting workstation to have filtering function

Abstract

The utility model belongs to the technical field of filtering of pipetting workstations, particularly relates to an accessory capable of enabling a small-sized pipetting workstation to have a filtering function, and aims at solving the problem that the small-sized pipetting workstation cannot filter liquid due to the fact that an existing positive pressure module is large in size and cannot be suitable for the small-sized pipetting workstation, the following scheme is provided: the positive pressure module comprises a positive pressure head and a filtering plate, a plurality of clamping holes are formed in the top of the positive pressure head at equal intervals, an air source inlet used for air inflow is formed in one side of the positive pressure head, and a plurality of liquid cavities used for storing liquid to be filtered are formed in the filter plate at equal intervals. The convenience of experimental operation is improved, the same gas source can be used during filtration by designing the gas cavity which is communicated with the gas cavity and the micropores in the gas cavity, and meanwhile, compressed gas can uniformly and stably enter the liquid cavity of the filter plate to provide power for liquid filtration.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering of a liquid transfer workstation, in particular to an accessory capable of enabling a small liquid transfer workstation to have a filtering function. Background Art

[0002] The pipetting workstation is an efficient and reliable experimental tool, mainly used in the fields of biology, clinical medicine, preventive medicine and public health for operations such as liquid movement, separation and drug screening. Its main function is to accurately transfer a specific volume of liquid from one container to another to achieve a specific purpose. The liquid is filtered by placing a positive pressure module in the pipetting workstation.

[0003] In actual use, due to the large size of the positive pressure module, it is not suitable for use in small pipetting workstations, resulting in the inability of small pipetting workstations to filter liquids. When filtering is required, other instruments must be used for filtering, which not only increases the operation steps but also increases the workload of the staff. Therefore, we propose an accessory that can enable small pipetting workstations to have filtering functions to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art that the positive pressure module is too large to be suitable for a small pipetting workstation, resulting in the small pipetting workstation being unable to filter the liquid, and proposes an accessory that enables the small pipetting workstation to have a filtering function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An accessory capable of providing a small-scale liquid transfer workstation with a filtering function, comprising a positive pressure head and a filter plate, wherein a plurality of clamping holes are provided at equal intervals on the top of the positive pressure head, an air source inlet for air intake is provided on one side of the positive pressure head, and a plurality of liquid cavities for storing liquid to be filtered are provided at equal intervals on the filter plate, and the accessory further comprises:

[0007] An air intake assembly is arranged on a positive pressure head and uses the pressure of compressed gas as a driving force for liquid filtration;

[0008] The filter assembly is arranged on the filter plate and is used for filtering the liquid in cooperation with the air intake assembly.

[0009] In one possible design, the air intake assembly includes multiple air channels, and the air channels are composed of multiple air cavities, two adjacent air cavities are connected, a connecting channel is provided in the positive pressure head, multiple air channels are connected to the connecting channel, and the air source inlet is connected to one end of the connecting channel.

[0010] In a possible design, micro-holes with flow-limiting effect are provided on the bottom inner walls of the plurality of air cavities, and the plurality of micro-holes penetrate the bottom of the positive pressure head.

[0011] In a possible design, a plurality of liquid chambers correspond to the microwells, and the plurality of liquid chambers are connected to the corresponding microwells.

[0012] In a possible design, a rubber pad made of rubber material is provided at the bottom of the positive pressure head for sealing when connected to the filter plate.

[0013] In a possible design, the filter assembly includes a plurality of filter membranes, and the plurality of filter membranes are disposed in corresponding liquid chambers.

[0014] In the present application, when in use, the liquid to be filtered is first injected into the liquid cavity on the filter plate, and then the air source inlet of the positive pressure head is connected to the compressed gas source, and the compressed gas source is started to allow the compressed gas to enter the air cavity in the air intake assembly. Since multiple air cavities are interconnected and connected to the air source inlet, the compressed gas can be evenly distributed to each air cavity.

[0015] Next, the compressed gas enters the corresponding liquid cavity through the micropores at the bottom of the gas cavity. Since the inner diameter of the micropores is smaller than the inner diameter of the liquid cavity, the airflow has a flow-limiting effect when it enters the liquid cavity from the micropores. Therefore, the gas flow and speed entering the liquid cavity can be controlled. In the process of the gas entering the liquid cavity, pressure is generated on the liquid, pushing the liquid through the filter membrane in the filter assembly for filtration. Finally, the liquid filtered by the filter membrane flows out of the liquid cavity, completing the filtration process. At the same time, the rubber pad at the bottom of the positive pressure head can provide a sealing effect during connection to prevent gas or liquid leakage.

[0016] Beneficial effects:

[0017] In the utility model, the accessory capable of enabling the small-sized liquid transfer workstation to have a filtering function has a simple structure and is easy to be used in conjunction with the small-sized liquid transfer workstation, thereby improving the convenience of experimental operation;

[0018] In the utility model, the accessory capable of enabling a small-scale liquid transfer workstation to have a filtering function, through the interconnected air cavity design and the micropores in the air cavity, can not only use the same air source during filtering, but also enable the compressed gas to enter the liquid cavity of the filter plate evenly and stably, thereby providing power for liquid filtration;

[0019] The utility model has a simple structure and is easy to use with a small liquid transfer workstation, thereby improving the convenience of experimental operation. By designing interconnected air cavities and micropores in the air cavities, not only can the same air source be used during filtration, but the compressed gas can also enter the liquid cavity of the filter plate evenly and stably, providing power for liquid filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an accessory proposed by the utility model that enables a small-scale liquid transfer workstation to have a filtering function;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of a positive pressure head of an accessory that enables a small-sized liquid transfer workstation to have a filtering function, as viewed from above;

[0022] Figure 3 This is a schematic diagram of a three-dimensional cross-sectional structure of a positive pressure head of an accessory that enables a small-sized liquid transfer workstation to have a filtering function, as proposed by the utility model;

[0023] Figure 4 The utility model discloses a sectional exploded three-dimensional structural schematic diagram of an accessory which enables a small-sized liquid transfer workstation to have a filtering function.

[0024] In the figure: 1. positive pressure head; 2. filter plate; 3. air source inlet; 4. clamping hole; 5. liquid cavity; 6. rubber pad; 7. air cavity; 8. micropores; 9. filter membrane. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] Reference Figure 1-4 An accessory with filtering function includes a positive pressure head 1 and a filter plate. The top of the positive pressure head 1 is designed with a plurality of equally spaced clamping holes 4, which are used to fix the pipette or other related equipment in the pipetting workstation. On one side of the positive pressure head 1, an air source inlet 3 is provided, which is used to introduce compressed gas as a power source for liquid filtration. A plurality of liquid cavities 5 are evenly spaced on the filter plate 2, which are used to store the liquid to be filtered. In order to achieve liquid filtration, the present invention also designs an air intake component and a filter component.

[0028] The air intake assembly is composed of multiple air channels, each of which is composed of multiple air cavities 7 connected in series. These air cavities 7 are formed inside the positive pressure head 1, and adjacent air cavities 7 are connected through a specific structure. These air cavities 7 are connected to the liquid cavity 5. Inside the positive pressure head 1, a connecting channel is provided. These air channels are all connected to the connecting channel, and the air source inlet 3 is connected to one end of the connecting channel to ensure that the compressed gas can smoothly enter the air cavity 7 of the air channel and then enter the liquid cavity 5.

[0029] A filter membrane 9 is provided in each liquid cavity 5 of the filter plate 2 , and effective filtration of the liquid can be achieved through the filter membrane 9 .

[0030] In order to ensure the sealing during the filtration process, a rubber pad 6 is provided at the bottom of the positive pressure head 1. When the positive pressure head 1 is connected to the filter plate 2, the rubber pad 6 can fit tightly to the top of the filter plate 2 to effectively prevent liquid leakage.

[0031] The present application can be used in the field of filtration technology of pipetting workstations, and can also be used in other fields applicable to the present application.

[0032] Example 2

[0033] refer to Figure 1-2 , improved on the basis of embodiment 1: an accessory that enables a small-scale pipetting workstation to have a filtering function, which is applied to the field of filtration technology of pipetting workstations. In order to achieve the flow limiting effect on the gas, micropores 8 are opened on the inner walls of the bottoms of multiple air cavities 7. These micropores 8 penetrate the bottom of the positive pressure head 1 and are connected to the liquid cavity 5, and the inner diameters of these micropores 8 are smaller than the inner diameters of the connected liquid cavities 5. Therefore, when the airflow enters the liquid cavity from the micropores 8, it has a flow limiting effect. Through the design of the micropores 8, the compressed gas can enter the liquid cavity 5 of the filter plate 2 evenly and stably, providing power for liquid filtration.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An accessory capable of providing a small-scale liquid transfer workstation with a filtering function, comprising a positive pressure head (1) and a filter plate (2), wherein a plurality of clamping holes (4) are provided at equal intervals on the top of the positive pressure head (1), an air source inlet (3) for air intake is provided on one side of the positive pressure head (1), and a plurality of liquid cavities (5) for storing liquid to be filtered are provided at equal intervals on the filter plate (2), characterized in that: The annex also includes: An air intake assembly, which is arranged on the positive pressure head (1) and uses the pressure of the compressed gas as a driving force for liquid filtration; A filter assembly is arranged on the filter plate (2) and is used to cooperate with the air intake assembly to filter the liquid.

2. The accessory capable of enabling a small-sized liquid transfer workstation to have a filtering function according to claim 1, characterized in that: The air intake assembly comprises a plurality of air passages, and the air passages are composed of a plurality of air cavities (7), two adjacent air cavities (7) are connected, a connecting passage is provided in the positive pressure head (1), the plurality of air passages are all connected to the connecting passage, and the air source inlet (3) is connected to one end of the connecting passage.

3. The accessory capable of enabling a small-sized liquid transfer workstation to have a filtering function according to claim 2, characterized in that: The inner walls of the bottoms of the plurality of air cavities (7) are provided with micropores (8) having a flow limiting effect, and the plurality of micropores (8) penetrate the bottom of the positive pressure head (1).

4. The accessory capable of enabling a small-sized liquid transfer workstation to have a filtering function according to claim 3, characterized in that: The plurality of liquid chambers (5) correspond to the micropores (8), and the plurality of liquid chambers (5) are in communication with the corresponding micropores (8).

5. The accessory capable of enabling a small-sized liquid transfer workstation to have a filtering function according to claim 1, characterized in that: The bottom of the positive pressure head (1) is provided with a rubber pad (6) made of rubber material for sealing when connected to the filter plate (2).

6. The accessory capable of enabling a small-sized liquid transfer workstation to have a filtering function according to claim 1, characterized in that: The filter assembly comprises a plurality of filter membranes (9), and the plurality of filter membranes (9) are arranged in corresponding liquid chambers (5).

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