Waste liquid collecting and sterilizing device for clean bench

Abstract

The utility model relates to the technical field of clean bench waste liquid recovery, in particular to a clean bench waste liquid collecting and disinfecting device which comprises a waste liquid funnel, a negative pressure control system, a disinfectant adding system, a disinfecting and sterilizing tank and a waste liquid collecting tank, the waste liquid funnel is arranged on the surface of the clean bench, and the lower end of the waste liquid funnel penetrates through a hole formed in the surface of the clean bench and is communicated with the disinfection and sterilization tank through a hose; the disinfection and sterilization tank is communicated with a disinfectant adding system through a hose; the disinfection and sterilization tank is communicated with the waste liquid collection tank through a hose; the disinfection and sterilization tank and the waste liquid collection tank are connected with a negative pressure control system through a three-way pipe. The components are controlled to be opened and closed through control valves, so that the waste liquid can be sucked, sterilized, disinfected and collected synchronously; and the whole waste liquid disinfection and collection system is in a negative pressure state during working, so that the risk of bacterial contamination is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid recovery of a laminar flow bench, in particular to a waste liquid collection and disinfection device for a laminar flow bench. Background Art

[0002] A laminar flow bench, also known as a purification workbench, is designed to meet the requirements for the cleanliness of local working areas in modern industries, optoelectronic industries, biopharmaceuticals, and scientific research experiments. It sucks air into a pre-filter through a fan, enters a high-efficiency filter through a static pressure box, and sends out the filtered air in a vertical or horizontal air flow state, so that the operation area reaches a cleanliness level of 100, ensuring the requirements for the environmental cleanliness of production.

[0003] Generally, the removal of waste liquid from cell culture in a biological laboratory is completed in a laminar flow bench through an electric pipette or a vacuum liquid suction system. When using an electric pipette to suck liquid, the liquid needs to be sucked into a glass tube, then the liquid is ejected from the glass tube, and then the next suction and drainage are carried out. Due to the limited volume of the glass tube, when sucking liquid from a large number of cell culture dishes, multiple repeated operations are required, with low efficiency and a risk of liquid being sucked back into the electric pipette, resulting in the failure of the electric pipette. Moreover, each time the waste liquid cylinder needs to pour out the waste liquid for disinfection before it can be placed in the laminar flow bench, there is a risk of bacterial contamination.

[0004] When using a vacuum liquid suction system, the buffer bottle needs to be evacuated first to form a negative pressure inside the bottle before liquid suction can be carried out. When a certain amount of liquid is sucked, the pressure in the buffer bottle returns to normal, and it is necessary to evacuate again to form a negative pressure before the next liquid suction can be carried out, which will affect the efficiency. Moreover, the vacuum pump and the buffer bottle are relatively large in volume and can only be placed outside the laminar flow bench. The silica gel tube enters the operation table of the laminar flow bench through the glass door of the laminar flow bench, which poses a risk of bacterial contamination. Summary of the Utility Model

[0005] In order to solve the problems of inconvenient waste liquid dumping in a laminar flow bench, easy bacterial contamination caused by repeatedly taking out the waste liquid cylinder, and subsequent disinfection treatment of waste liquid, the utility model adopts the following technical means:

[0006] A waste liquid collection and disinfection device for a laminar flow bench includes a waste liquid funnel, a negative pressure control system, a disinfectant adding system, a disinfection and sterilization tank, and a waste liquid collection tank. The waste liquid funnel is placed on the operation table of the laminar flow bench, and the lower end of the waste liquid funnel penetrates through a hole opened on the operation table of the laminar flow bench and is connected to the disinfection and sterilization tank through a hose; the disinfection and sterilization tank is connected to the disinfectant adding system through a hose; the disinfection and sterilization tank is connected to the waste liquid collection tank through a hose; the disinfection and sterilization tank and the waste liquid collection tank are connected to the negative pressure control system through a three-way pipe.

[0007] The upper surface of the waste liquid funnel is provided with a sealing cover, and the upper end of the sealing cover is connected with a suction pipe through a quick connector.

[0008] Preferably, a suction control valve is provided on the suction pipe.

[0009] A waste liquid control valve is provided on the hose connecting the waste liquid funnel and the disinfection and sterilization tank.

[0010] A disinfectant liquid control valve is provided on the hose connecting the disinfectant liquid adding system and the disinfection and sterilization tank.

[0011] A disinfection - collection control valve is provided on the hose connecting the disinfection and sterilization tank and the waste liquid collection tank.

[0012] A disinfection and sterilization control valve is provided on the tee pipe connecting the disinfection and sterilization tank.

[0013] A waste liquid collection control valve is provided on the tee pipe connecting the waste liquid collection tank.

[0014] The above - mentioned suction control valve, waste liquid control valve, disinfection and sterilization control valve, disinfection - collection control valve, waste liquid collection control valve and disinfectant liquid control valve are all check valves.

[0015] An air filter membrane is provided on the tee pipe connecting the negative pressure control system.

[0016] The tee pipe orifice inserted into the disinfection and sterilization tank and the tee pipe orifice inserted into the waste liquid collection tank are both above the liquid level in their respective tanks.

[0017] The ultra - clean workbench waste liquid collection and disinfection device is a sealed structure when all control valves are closed.

[0018] The materials of the disinfection and sterilization tank and the waste liquid collection tank are both glass or stainless steel.

[0019] The hose is a pressure - resistant pipe.

[0020] The utility model has the following beneficial effects: The ultra - clean workbench waste liquid collection and disinfection device of the utility model has more powerful functions than the original waste liquid tank, and can realize the simultaneous suction, disinfection and collection of waste liquid; and the whole waste liquid disinfection and collection system is in a negative pressure state during operation, avoiding the risk of bacterial contamination; in addition, using this device can improve the operation environment, reduce the exposure time of waste liquid to the air, reduce the formation of aerosols, the used waste liquid collection tank is easy to replace, effectively reducing the probability of cell contamination and increasing the usable area of the ultra - clean workbench. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an ultra - clean workbench waste liquid collection and disinfection device of the utility model.

[0022] In the figure: 1. Tabletop of the laminar flow bench; 2. Suction pipe; 3. Suction control valve; 31. Waste liquid control valve; 32. Disinfection and sterilization control valve; 33. Disinfection - collection control valve; 34. Waste liquid collection control valve; 35. Disinfectant liquid control valve; 4. Sealing cover; 5. Waste liquid funnel; 6. Negative pressure control system; 7. Air filter membrane; 8. Disinfectant liquid addition system; 9. Disinfection and sterilization tank; 10. Waste liquid collection tank. Specific embodiments

[0023] The present utility model will be further described below in conjunction with embodiments.

[0024] As Figure 1 shown, for a waste liquid collection and disinfection device of a laminar flow bench of the present utility model, a hole is opened on the tabletop 1 of the laminar flow bench, and the waste liquid funnel 5 is placed above the hole on the tabletop 1 of the laminar flow bench; a sealing cover 4 is provided on the upper surface of the waste liquid funnel 5, and the upper end of the sealing cover 4 is connected with a suction pipe 2 through a quick - connect interface. A suction control valve 3 is provided on the suction pipe 2, and the other end of the suction pipe 2 can be connected to a pipette tip for sucking waste liquid; the lower end of the waste liquid funnel 5 passes through the hole to the lower surface of the tabletop 1 of the laminar flow bench, and the lower end of the waste liquid funnel 5 is communicated with a disinfection and sterilization tank 9 through a hose, and a waste liquid control valve 31 is provided on the hose connecting the waste liquid funnel 5 and the disinfection and sterilization tank 9; the disinfection and sterilization tank 9 is communicated with a disinfectant liquid addition system 8 through a hose, and a disinfectant liquid control valve 35 is provided on the hose connecting the disinfectant liquid addition system 8 and the disinfection and sterilization tank 9. The disinfectant liquid addition system 8 can monitor the concentration of the disinfectant liquid in the disinfection and sterilization tank 9 and automatically or manually add disinfectant liquid to the disinfection and sterilization tank 9; the disinfection and sterilization tank 9 is communicated with a waste liquid collection tank 10 through a hose, and a disinfection - collection control valve 33 is provided on the hose connecting the disinfection and sterilization tank 9 and the waste liquid collection tank 10; the disinfection and sterilization tank 9 and the waste liquid collection tank 10 are connected to a negative pressure control system 6 through a three - way pipe, and the negative pressure control system 6 can adjust the magnitude of the negative pressure in the whole system; the three - way pipe orifice inserted into the disinfection and sterilization tank 9 and the three - way pipe orifice inserted into the waste liquid collection tank 10 are both above the liquid level in their respective tanks; an air filter membrane 7 is provided on the three - way pipe connecting the negative pressure control system 6, and the filter membrane assembly of the air filter membrane 7 can be replaced; a disinfection and sterilization control valve 32 is provided on the three - way pipe connecting the disinfection and sterilization tank 9, and a waste liquid collection control valve 34 is provided on the three - way pipe connecting the waste liquid collection tank 10.

[0025] In this device, the sealing cover 4 is installed on the waste liquid funnel 5 through soft rubber; the disinfection and sterilization tank 9 and the waste liquid collection tank 10 are sealed by screw caps. The upper part of the screw cap is connected to the pipeline through a sealed straight pipe to ensure the tightness of the whole device. The suction control valve 3, the waste liquid control valve 31, the disinfection and sterilization control valve 32, the disinfection-collection control valve 33, the waste liquid collection control valve 34 and the disinfectant control valve 35 are all check valves, which can control the closing and opening of the pipeline, so as to realize the suction, disinfection and collection of waste liquid. The materials of the disinfection and sterilization tank 9 and the waste liquid collection tank 10 are glass or stainless steel, and the hoses are all pressure-resistant pipes, which can ensure no deformation under a certain negative pressure.

[0026] Operating procedure of the waste liquid collection and disinfection device of the ultra-clean workbench in this embodiment:

[0027] Suction of waste liquid: Seal and install the sealing cover 4 on the waste liquid funnel 5, insert the nozzle of the suction pipe 2 into the waste liquid generated during the operation in the ultra-clean workbench. When the suction control valve 3, the waste liquid control valve 31 and the disinfection and sterilization control valve 32 are opened (other control valves are closed), and the negative pressure control system 6 is started, the waste liquid suction pipeline is in a negative pressure state, sucking the waste liquid into the waste liquid funnel 5 and entering the disinfection and sterilization tank 9 through the pipeline, realizing the suction of waste liquid.

[0028] Disinfection and sterilization of waste liquid: When the disinfection and sterilization control valve 32 and the disinfectant control valve 35 are opened (other control valves are closed), and the negative pressure control system 6 and the disinfectant adding system 8 are started, the waste liquid disinfection and sterilization pipeline is in a negative pressure state, realizing the addition of disinfectant from the disinfectant adding system 8 into the disinfection and sterilization tank 9, and realizing the disinfection and sterilization of waste liquid.

[0029] Collection of waste liquid: When the disinfection-collection control valve 33 and the waste liquid collection control valve 34 are opened (other control valves are closed), and the negative pressure control system 6 is started and the disinfectant adding system 8 is closed, the waste liquid collection pipeline is in a negative pressure state, realizing the entry of the disinfected and sterilized waste liquid in the disinfection and sterilization tank 9 into the waste liquid collection tank 10, and realizing the collection of waste liquid.

[0030] According to the above operation procedures of suction of waste liquid and disinfection and sterilization of waste liquid, by opening or closing the corresponding control valves and starting or closing the systems, the operations of suction of waste liquid and disinfection and sterilization of waste liquid can also be carried out simultaneously to realize the simultaneous suction and disinfection and sterilization of waste liquid. When the suction control valve 3, the waste liquid control valve 31, the disinfection and sterilization control valve 32 and the disinfectant control valve 35 are opened (other control valves are closed), and the negative pressure control system 6 and the disinfectant adding system 8 are started, the waste liquid suction and disinfection and sterilization pipelines are in a negative pressure state, realizing the entry of waste liquid into the disinfection and sterilization tank 9 and the addition of disinfectant, and realizing the simultaneous suction and disinfection and sterilization of waste liquid.

[0031] According to the above operation process of disinfecting and sterilizing waste liquid and collecting waste liquid, the operations of disinfecting and sterilizing waste liquid and collecting waste liquid can be simultaneously implemented by opening or closing the corresponding control valves and starting or stopping the system, so as to realize the simultaneous disinfection and sterilization and collection of waste liquid. When the disinfection and sterilization control valve 32, the disinfectant control valve 35, the disinfection-collection control valve 33 and the waste liquid collection control valve 34 are opened (other control valves are closed), and the negative pressure control system 6 and the disinfectant addition system 8 are started, the waste liquid disinfection, sterilization and collection pipeline presents a negative pressure state, and the waste liquid is disinfected and sterilized in the disinfection and sterilization tank 9 and then enters the waste liquid collection tank 10, realizing the simultaneous disinfection and sterilization and collection of waste liquid.

[0032] Insert the nozzle of the suction pipe 2 into a large amount of waste liquid. When the above-mentioned control valves are simultaneously opened and the negative pressure control system 6 and the disinfectant addition system 8 are started, the suction, disinfection, sterilization and collection of waste liquid can be carried out simultaneously.

[0033] The above embodiments are only used to illustrate the technical idea and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the protection scope of the present invention.

Claims

1. A waste liquid collection and disinfection device for a clean bench, comprising a waste liquid funnel (5), a negative pressure control system (6), a disinfectant addition system (8), a disinfection tank (9) and a waste liquid collection tank (10), characterized in that: The waste liquid funnel (5) is placed on the clean bench surface (1); the lower end of the waste liquid funnel (5) passes through a hole provided on the clean bench surface (1) and is connected to the disinfection tank (9) via a hose; the disinfection tank (9) is connected to the disinfectant adding system (8) via a hose; the disinfection tank (9) is connected to the waste liquid collecting tank (10) via a hose; the disinfection tank (9) and the waste liquid collecting tank (10) are connected to the negative pressure control system (6) via a three-way pipe.

2. The clean bench waste liquid collection and disinfection device according to claim 1, characterized in that: A sealing cover (4) is provided on the upper surface of the waste liquid funnel (5), and the upper end of the sealing cover (4) is connected to a suction tube (2) via a quick-insert interface.

3. The waste liquid collection and disinfection device for a clean bench according to claim 2, characterized in that: The suction pipe (2) is provided with a suction control valve (3).

4. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: A waste liquid control valve (31) is provided on a hose connecting the waste liquid funnel (5) and the disinfection tank (9); a disinfection liquid control valve (35) is provided on a hose connecting the disinfection liquid addition system (8) and the disinfection tank (9); and a disinfection-collection control valve (33) is provided on a hose connecting the disinfection tank (9) and the waste liquid collection tank (10).

5. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: An air filter membrane (7) is arranged on the three-way pipe connected to the negative pressure control system (6).

6. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: A disinfection control valve (32) is provided on the three-way pipe connected to the disinfection tank (9), and a waste liquid collection control valve (34) is provided on the three-way pipe connected to the waste liquid collection tank (10).

7. The waste liquid collection and disinfection device for a clean bench according to claim 3, characterized in that: The suction control valve (3) is a check valve.

8. The waste liquid collection and disinfection device for a clean bench according to claim 4, characterized in that: The waste liquid control valve (31), the disinfection-collection control valve (33) and the disinfectant liquid control valve (35) are all check valves.

9. The waste liquid collection and disinfection device for a clean bench according to claim 6, characterized in that: The disinfection and sterilization control valve (32) and the waste liquid collection control valve (34) are both check valves.

10. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: The three-way pipe opening inserted into the disinfection tank (9) and the three-way pipe opening inserted into the waste liquid collection tank (10) are both above the liquid level in the tanks.

11. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: The ultra-clean workbench waste liquid collection and disinfection device is a sealed structure when each control valve is closed.

12. The waste liquid collection and disinfection device for a clean bench according to claim 1, characterized in that: The disinfection tank (9) and the waste liquid collection tank (10) are made of glass or stainless steel; and the hose is a pressure-resistant tube.

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