Batch automatic filtering device adaptive to laboratory liquid samples

Abstract

The utility model relates to the technical field of analysis and detection, and particularly discloses a batch automatic filtering device adaptive to laboratory liquid samples, which comprises a filter, a suction filtration system and a control system, the filter comprises a filter upper part and a filter lower part, the filter upper part is connected with a filter upper part guide pipe, and the suction filtration system comprises a suction filtration box and a suction filtration pump. The suction filtration box comprises a suction filtration box cover plate and a suction filtration box body, a plurality of filter insertion holes are formed in the suction filtration box cover plate, connecting parts matched with the filter insertion holes are connected below the lower part of the filter, the lower part of the filter is connected with a filter lower part filter pipe, and a filtrate receiving container is arranged below the filter lower part filter pipe. According to the utility model, batch automatic filtration can be carried out, the volume required by analysis and test can be completed at one time, the filter can be reused, and the filtration of mass water quality samples in laboratories, especially geology laboratories of territorial systems, can be completed, so that the filtration efficiency is greatly improved, the labor intensity is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of analysis and detection, in particular to a batch automatic filtering device adapted to liquid samples in laboratories. Background Art

[0002] The filtration of liquid samples is a basic work that is simple and repetitive and has a relatively high labor intensity in the daily analysis and testing work of analysis and detection laboratories. In laboratories, especially geological laboratories in the land and resources system, when conducting a comprehensive analysis or a simple analysis of liquid samples, the number of analyzed samples is large. At present, in analytical experiments, the filtration of samples mostly uses needle filters. A needle filter generally consists of a syringe and a filtrator. A microporous filter membrane is provided in the filtrator. Under the external force of the syringe, the solution passes through the microporous filter membrane, and solids and other substances are retained on the microporous filter membrane to achieve filtration. The entire filtration process completely relies on manual labor, and only a single sample can be filtered manually each time. Limited by the volume of the needle filter, the filtration volume each time is 10 mL. Considering factors such as the determination of parallel samples and spike recovery, each sample needs to be filtered 5 times to complete the required volume for one sample determination, resulting in low production efficiency and high labor intensity; the needle filters are all of fixed sizes and cannot be adapted to be connected to a batch automatic suction filtration box; the needle filters are disposable consumables, cannot be recycled, have a relatively high cost and will cause environmental pollution.

[0003] Therefore, it is necessary to propose an improvement to overcome the defects of the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art and provide a batch automatic filtering device adapted to liquid samples in laboratories.

[0005] The technical solution of the utility model is as follows:

[0006] An automatic batch filtration device adapted to laboratory liquid samples, comprising a filter, a suction filtration system and a control system. The filter includes a detachable upper part of the filter and a lower part of the filter. A boss is provided on the lower part of the filter, and a through hole for the filtered liquid to pass through is provided at the top of the boss. A filter membrane is provided between the boss and the upper part of the filter, and a gasket is provided between the filter membrane and the upper part of the filter. A filter upper conduit is connected to the upper part of the filter. The suction filtration system includes a suction filtration box and a suction pump connected to the suction filtration box. The suction filtration box includes a suction filtration box cover plate and a suction filtration box body connected in a sealed manner. A plurality of filter sockets are provided on the suction filtration box cover plate, and a sealing cover is provided on the filter sockets. A connecting part adapted to the filter socket is connected below the lower part of the filter. The lower part of the filter is connected with a lower filter tube of the filter, and the lower filter tube of the filter extends into the suction filtration box body. A filtered liquid receiving container is provided below the lower filter tube of the filter. By providing a plurality of filter sockets on the suction filtration box, automatic and batch filtration can be realized under the control of the control system. The liquid to be filtered is directly introduced into the filter through the filter upper conduit, and the volume required for analysis and testing can be completed at one time. The filter membrane is convenient to replace, and the filter can be reused.

[0007] Optionally, a buffer bottle is provided between the suction filtration box and the suction pump. A suction filtration port is provided on the suction filtration box body. The buffer bottle is connected to the suction filtration port through a first connecting conduit, and the buffer bottle is connected to the suction pump through a second connecting conduit. By providing a buffer bottle, the liquid is prevented from being sucked into the suction pump.

[0008] Optionally, the upper part of the filter is provided with an internal thread, and the boss is provided with an external thread. The upper part of the filter and the boss are threadedly connected, which is convenient for replacing the filter membrane.

[0009] Optionally, a filter upper valve is provided on the filter upper conduit. It is used to control the entry and stop of the liquid to be filtered.

[0010] Optionally, a waste discharge port is provided on the suction filtration box body, a waste discharge conduit is connected to the waste discharge port, and a waste liquid tank is correspondingly provided below the waste discharge conduit. The waste liquid generated during the filtration process is introduced into the waste liquid tank through the waste discharge conduit, and then the waste liquid in the waste liquid tank is disposed of according to the laboratory management requirements.

[0011] Optionally, a waste discharge valve is provided on the waste discharge conduit. It controls the discharge and stop of the waste liquid.

[0012] Optionally, a sealing bolt is provided on the suction filtration box cover plate. It is used to form a vacuum system by sealing the suction filtration box cover plate and the suction filtration box.

[0013] Optionally, the filter membrane is an acetate filter membrane or a polyethylene filter membrane.

[0014] Optionally, the pore size of the filter membrane is less than 0.45 μm or less than 0.22 μm. Select a suitable filter membrane pore size according to the requirements of the filtered sample.

[0015] Optionally, anti-slip patterns are provided on the outer periphery of the upper part of the filter.

[0016] The beneficial effects of the present utility model are as follows:

[0017] A batch automatic filtering device for adapting to laboratory liquid samples of the present utility model can perform batch automatic filtering, can complete the volume required for analysis and testing at one time, the filter can be reused, and can complete the filtering of a large number of water quality samples in laboratories, especially geological laboratories in the land system, greatly improving the filtering efficiency, reducing the labor intensity, lowering the production cost, the whole machine process is simple and practical, the filtering quality can meet the industry technical requirements, and through daily actual work use, it is proved that the present utility model has strong applicability and practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of the suction filtration box of the present utility model;

[0020] Among them, 1. upper conduit of the filter; 2. upper valve of the filter; 3. upper part of the filter; 4. gasket; 5. filter membrane; 6. boss; 7. lower part of the filter; 8. connecting part; 9. sealing bolt; 10. cover plate of the suction filtration box; 11. main body of the suction filtration box; 12. sealing cover; 13. suction filtration port; 14. waste discharge port; 15. waste discharge valve; 16. waste liquid tank; 17. waste discharge conduit; 18. lower filter tube of the filter; 19. filter liquid receiving container; 20. suction filtration pump; 21. second connecting conduit; 22. buffer bottle; 23. first connecting conduit; 24. filter socket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical means, technical features, utility model purpose and technical effects achieved by the present utility model easy to understand, the present utility model will be further described below with reference to specific drawings.

[0022] As Figure 1 and Figure 2 shown, a batch automatic filtering device for adapting to laboratory liquid samples includes a filter, a suction filtration system and a control system. The main function of the filter is to filter the liquid sample through the filter membrane with the pore size of this system to remove the damage of solid or suspended components in the sample to precision instruments, and at the same time meet the requirements of the soluble state for water quality analysis. The main function of the suction filtration system is to be used for receiving the suction filtered sample. The main function of the control system is to control the suction filtration and stop through the integrated circuit system.

[0023] The filter includes an upper filter part 3 and a lower filter part 7. The upper filter part 3 is provided with internal threads, and anti-slip threads are provided on the outer periphery of the upper filter part 3. A boss 6 is provided on the lower filter part 7, external threads are provided on the boss 6, and a through hole for the filtered liquid to pass through is provided at the top of the boss 6. A filter membrane 5 is provided between the boss 6 and the upper filter part 3, and a gasket 4 is provided between the filter membrane 5 and the upper filter part 3. The upper filter part 3 and the lower filter part 7 are connected through the internal threads of the upper filter part 3 and the external threads of the boss 6, and the filter membrane 5 is tightly sealed between the upper filter part 3 and the boss 6 through the gasket 4. The filter membrane 5 is an acetate fiber filter membrane or a polyethylene filter membrane, and the pore diameters of the filter membrane 5 include two types, less than 0.45 um and less than 0.22 um. A upper filter conduit 1 for connecting an external liquid sample to be filtered is connected to the upper filter part 3. A upper filter valve 2 for controlling the entry and stop of the liquid to be filtered is provided on the upper filter conduit 1. A connecting part 8 is connected below the lower filter part 7, and the filter is connected to a suction filtration system through the connecting part 8.

[0024] The suction filtration system includes a suction filtration box, a buffer bottle 22, and a suction pump 20. The suction filtration box includes a suction filtration box cover plate 10 and a suction filtration box body 11 which are hermetically connected. A sealing bolt 9 is provided on the suction filtration box cover plate 10 for the suction filtration box cover plate 10 and the suction filtration box body 11 to be hermetically sealed to form a vacuum system. A number of filter sockets 24 are provided on the suction filtration box cover plate 10, and sealing covers 12 are provided on the filter sockets 24. A connecting part 8 adapted to the filter socket 24 is connected below the lower filter part 7. A lower filter conduit 18 is connected to the lower filter part 7, and the lower filter conduit 18 is used for the drainage and conduction of the filtered liquid, and the lower filter conduit 18 extends into the suction filtration box body 11. A filtered liquid receiving container 19 is provided below the lower filter conduit 18. The filtered liquid receiving container 19 is a container adapted to different detection parameter requirements, and can be a glass or polyethylene plastic bottle for receiving the filtered liquid.

[0025] A suction port 13 is provided on the suction filtration box body 11. The buffer bottle 22 is connected to the suction port 13 through a first connecting conduit 23, and the buffer bottle 22 is connected to the suction pump 20 through a second connecting conduit 21. By providing the buffer bottle 22, the liquid is prevented from being sucked into the suction pump 20.

[0026] A waste discharge port 14 is provided on the suction filtration box body 11. A waste discharge conduit 17 is connected to the waste discharge port 14, and a waste liquid tank 16 is correspondingly provided below the waste discharge conduit 17. The waste liquid generated during the filtration process is introduced into the waste liquid tank 16 through the waste discharge conduit 17, and then the waste liquid in the waste liquid tank 16 is disposed of according to the laboratory management requirements. A waste discharge valve 15 is provided on the waste discharge conduit 17 to control the discharge and stop of the waste liquid.

[0027] The above are only the preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. That is, all equivalent changes and modifications made to the content within the scope of the patent application of the present utility model shall fall within the technical scope of the present utility model.

Claims

1. A batch automatic filtration device adapted for laboratory liquid samples, comprising a filter, a filtration system and a control system, characterized in that: The filter comprises a detachably connected filter upper part (3) and a filter lower part (7), the filter lower part (7) being provided with a boss (6), the top of the boss (6) being provided with a through hole for filtered liquid to pass through, a filter membrane (5) being provided between the boss (6) and the filter upper part (3), a gasket (4) being provided between the filter membrane (5) and the filter upper part (3), the filter upper part (3) being connected with a filter upper conduit (1), the filtration system comprising a filtration box, a filtration pump (20) connected to the filtration box, the filtration box comprising a sealing A filter box cover (10) and a filter box body (11) are connected, the filter box cover (10) is provided with a plurality of filter jacks (24), the filter jacks (24) are provided with sealing covers (12), a connection portion (8) adapted to the filter jacks (24) is connected below the filter lower portion (7), a filter lower filter tube (18) is connected to the filter lower portion (7), the filter lower filter tube (18) extends into the filter box body (11), and a filtered liquid receiving container (19) is provided below the filter lower filter tube (18).

2. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: A buffer bottle (22) is provided between the suction filter box and the suction filter pump (20); a suction filter port (13) is provided on the suction filter box body (11); the buffer bottle (22) is connected to the suction filter port (13) via a first connecting conduit (23); and the buffer bottle (22) is connected to the suction filter pump (20) via a second connecting conduit (21).

3. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: The filter upper part (3) is provided with an internal thread, the boss (6) is provided with an external thread, and the filter upper part (3) and the boss (6) are threadedly connected.

4. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: The filter upper conduit (1) is provided with a filter upper valve (2).

5. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: The filtration box body (11) is provided with a waste discharge port (14), the waste discharge port (14) is connected to a waste discharge conduit (17), and a waste liquid tank (16) is correspondingly provided below the waste discharge conduit (17).

6. The batch automatic filtering device adapted for laboratory liquid samples according to claim 5, characterized in that: The waste discharge conduit (17) is provided with a waste discharge valve (15).

7. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: A sealing bolt (9) is provided on the filter box cover plate (10).

8. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: The filter membrane (5) is a cellulose acetate filter membrane or a polyethylene filter membrane.

9. The batch automatic filtering device adapted for laboratory liquid samples according to claim 1, characterized in that: The pore size of the filter membrane (5) is less than 0.45 μm or less than 0.22 μm.

10. A batch automatic filtering device adapted for laboratory liquid samples according to any one of claims 1 to 9, characterized in that: The outer periphery of the upper part (3) of the filter is provided with anti-slip grooves.

Images