Mobile biosafety pre-treatment device suitable for field operations

Abstract

The application discloses a mobile biological safety pretreatment device suitable for field operation and relates to the field of microbiological examination, comprising a protection box, a treatment box arranged on one side of the protection box, an optical sterilization and killing unit, a front cover, an operation hole and a sealing glove arranged in the protection box, and a pull-out sample delivery box arranged on the back of the protection box, which realizes aseptic delivery and operation of samples; an absorption pool, a filter membrane treatment seat and a suction filter pump are arranged in the treatment box and are communicated with the inner cavity of the protection box through pipelines; the application has the following advantages: 1. providing a closed and aseptic operation space on site to realize sample pretreatment; and 2. carrying out harmless treatment on biological toxin aerosols generated in operation, which can be chemically absorbed through the absorption pool or physically filtered through the filter membrane treatment seat, and the suction filter pump realizes gas circulation and purification; the device has high integration degree, is convenient to move, is suitable for complex field environments and effectively guarantees operation safety and sample authenticity.

Description

Technical Field

[0001] This application relates to the field of microbiological testing, and in particular to mobile biosafety pretreatment devices suitable for field operations. Background Technology

[0002] In the field of food microbiology testing, sample pretreatment after on-site sampling is a crucial step in ensuring accurate results. Currently, common operating methods include using simple sterile bags, portable alcohol lamps, and small workbenches, which can provide a basic sterile environment to some extent. In addition, fixed biosafety cabinets are the gold standard for handling high-risk samples in laboratories, providing a highly clean local space and personnel protection. However, they are bulky, rely on a fixed power supply, and cannot be moved, limiting their use to laboratory environments. Existing technical solutions mostly focus on basic protection for operators or rely on fixed, large-scale laboratory infrastructure.

[0003] However, when operating in non-laboratory environments such as farmers' markets, restaurant kitchens, and ports, the above technologies are difficult to meet the requirements; the on-site environment is complex and there are a large number of uncontrollable sources of pollution. The samples need to undergo a transfer process before completing the pretreatment, which not only increases the possibility of sample distortion and changes in the number of microorganisms. Utility Model Content

[0004] To address the lack of aseptic operation and safety protection in on-site operations, this application provides a mobile biosafety pretreatment device suitable for on-site operations.

[0005] The mobile biosafety pretreatment device for on-site operations provided in this application adopts the following technical solution:

[0006] A mobile biosafety pretreatment device suitable for on-site operations includes a portable protective case, the interior of which is equipped with an optical disinfection unit;

[0007] The protective box is provided with a front cover that can be opened and closed, and the front side of the protective box is provided with two or more operating holes, and gloves are sealed on the inner wall of the operating holes.

[0008] A sample transfer box is pulled out from the bottom back of the protective box. The sample transfer box has a flip cover on top. When the sample transfer box is pushed into the inner cavity of the protective box, one end of the sample transfer box with the flip cover is located in the inner cavity of the protective box, and the other end of the sample transfer box is located outside the protective box.

[0009] By adopting the above technical solution, this application provides a sealed space through a protective box, which is used in conjunction with an optical sterilization unit for sterilization. The operator can place tools by opening and closing the front cover and perform aseptic operation using gloves sealed on the operation port. Samples are transferred through a pull-out sample transfer box. When the sample transfer box is pushed in, the top cover at one end of the inner cavity of the protective box can be opened to access the sample, realizing the safe transfer of samples between the inside and outside environment of the protective box. At the same time, the portable protective box makes it easy for people to carry and deploy it in non-laboratory environments such as farmers' markets, restaurant kitchens, and port sites. All these features together constitute a mobile, miniature aseptic operation platform that can effectively isolate external contamination and can effectively avoid the possibility of distortion of samples and changes in the number of microorganisms caused by complex on-site environments.

[0010] Preferably, a processing box is provided on one side of the protective box. The processing box contains an absorption tank, a filter membrane treatment seat, and a vacuum pump. A first pipe and a second pipe are connected above the inner cavity of the protective box. The first pipe is inserted from the top of the absorption tank and connected to the bottom of the absorption tank. A one-way valve is installed in the inner cavity at the end of the first pipe. The second pipe is connected to the air inlet of the filter membrane treatment seat. A multi-way solenoid valve is provided above the vacuum pump. The inlet of the vacuum pump is connected to the outlet of the multi-way solenoid valve. The inlet of the vacuum pump is connected to the outlet of the filter membrane treatment seat or the gas above the inner cavity of the absorption tank through the multi-way solenoid valve.

[0011] By adopting the above technical solution, the treatment box and the absorption tank, filter membrane treatment seat, and suction pump inside the treatment box are connected by the first pipe, the second pipe and the multi-way solenoid valve to form two sets of hazardous substance treatment paths, which can chemically absorb or physically filter the gas in the protective box. The one-way valve at the end of the first pipe is used to prevent the liquid in the absorption tank 22 from flowing back into the protective box 1 due to the siphon effect.

[0012] Preferably, a filling pipe is provided on one side of the treatment box, the filling pipe is connected to the inner cavity of the absorption tank, a sealing cap is detachably connected to the top of the filling pipe, and the top of the filling pipe is lower than the inner top surface of the absorption tank.

[0013] By adopting the above technical solution, the filling pipe and sealing cap enable convenient addition and sealed storage of the absorbent liquid. The design of the top of the filling pipe being lower than the top surface of the absorption tank ensures that the inner cavity of the absorption tank will not be filled with absorbent liquid, that is, the upper part of the inner cavity of the absorption tank is gas.

[0014] Preferably, the filter membrane treatment seat includes a fixed seat and a movable seat. The fixed seat is fixedly connected to the treatment box. A ring-shaped magnet is fixedly connected to the upper part of the movable seat. The movable seat is connected to the fixed seat through the magnet. The lower part of the fixed seat is fitted into the magnet. A circular filter membrane is clamped and connected between the fixed seat and the movable seat.

[0015] By adopting the above technical solution, the filter membrane treatment seat, which consists of a fixed seat, a movable seat, a magnet and a circular filter membrane, achieves rapid opening, closing and sealing of the fixed seat and the movable seat through magnetic adsorption, which facilitates the installation, replacement and clamping of the circular filter membrane.

[0016] Preferably, the fixed seat has a first circular hole, and an inlet pipe connected to the second pipe is fixedly connected above the first circular hole in the fixed seat. The movable seat has a second circular hole, and a flexible hose connected to a multi-way solenoid valve is fixedly connected below the second circular hole in the movable seat.

[0017] By adopting the above technical solution, the inlet pipe, the first round hole on the fixed seat, the second round hole on the movable seat, and the hose cooperate to form a complete airflow channel through the circular filter membrane in the filter membrane treatment seat, so that the flowing gas can be filtered.

[0018] Preferably, a drain valve is provided on one side of the treatment tank, and one end of the drain valve is connected to the inner cavity of the absorption tank.

[0019] By adopting the above technical solution, the connection between the drain valve and the absorption tank enables the controllable and smooth discharge of waste liquid.

[0020] Preferably, a magnetic pad is integrally formed between the protective box and the front cover, and the magnetic pad is installed on the protective box at a position corresponding to the sealing edge end face of the front cover.

[0021] By adopting the above technical solution, the magnetic gasket is installed at the joint between the protective box and the front cover, and the magnetic force is used to achieve a quick sealing and closure of the front cover.

[0022] Preferably, the fixed seat has a downwardly protruding first V-shaped sealing surface below it, and the movable seat has a downwardly recessed second V-shaped sealing surface above it.

[0023] By adopting the above technical solution, the first V-shaped sealing surface on the fixed seat and the second V-shaped sealing surface on the movable seat cooperate with each other, so that the middle part of the circular filter membrane can be folded in a V-shape when clamping the circular filter membrane, thereby significantly increasing the effective filtration area of ​​the airflow passing through the circular filter membrane and improving the filtration efficiency.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application comprises a portable protective case, an optical disinfection unit, a front cover, an operating port, gloves, a sample transfer box, and a flip cover, forming a mobile miniature sterile operating space. It can be directly transported and deployed at the sampling site, allowing the sample pretreatment operation to be completed in an isolated state, completely avoiding sample distortion during transportation, and fundamentally eliminating the risk of contamination of operators and the external environment by harmful microorganisms during operation, thus meeting the needs of on-site operations.

[0026] 2. The processing box integrated on one side of the protective box and the absorption pool, filter membrane treatment seat, suction pump, multi-way solenoid valve and related pipelines inside the protective box constitute a gas purification device. It can actively draw in gases that may contain harmful aerosols after operation and selectively perform chemical absorption or physical filtration. Finally, it can verify the purification effect by detecting the circular filter membrane. This makes the treatment of hazardous samples such as aflatoxin safer and more thorough, realizes on-site safe treatment, avoids bringing the risk of pollution back to the laboratory, and expands the on-site harmless treatment and verification capabilities of hazardous substances.

[0027] 3. The magnetic gasket in this application ensures rapid sealing of the front cover; the filter membrane treatment seat achieves quick assembly and disassembly through magnetic adsorption, and the design of the first V-shaped sealing surface and the second V-shaped sealing surface not only ensures sealing performance but also increases the filtration area of ​​the circular filter membrane; the filling pipe and drain valve facilitate reagent replacement; together, they improve the overall integration, ease of operation and maintenance efficiency of the device, making it more suitable for stable and efficient use in field environments with varying conditions. Attached Figure Description

[0028] Figure 1 This is an overall schematic diagram of this application;

[0029] Figure 2 For this application Figure 1 Enlarged view of point A;

[0030] Figure 3 This is a schematic diagram of the protective box used in this application;

[0031] Figure 4 Partial cross-section of the processing box of this application Figure 1 ;

[0032] Figure 5 Partial cross-section of the processing box of this application Figure 2 ;

[0033] Figure 6 This is an exploded view of the filter membrane treatment unit of this application.

[0034] Attached reference numerals: 1. Protective box; 11. Operating hole; 12. Front cover; 13. Magnetic pad; 14. Sample transfer box; 15. Flip-top; 16. Optical sterilization unit;

[0035] 2. Processing tank; 21. Tank door; 22. Absorption tank; 23. Filling pipe; 24. Sealing cap; 25. Drain valve; 26. Gas delivery pipe; 3. Gloves; 4. First pipe; 5. Second pipe;

[0036] 6. Filter membrane treatment seat; 61. Fixed seat; 62. First V-shaped sealing surface; 63. First round hole; 64. Inlet pipe; 65. Circular filter membrane; 66. Movable seat; 67. Magnet; 68. Second V-shaped sealing surface; 69. Second round hole;

[0037] 7. Filter pump; 71. Suction pipe; 72. Multi-way solenoid valve; 73. Connecting pipe; 74. Hose; 8. Portable power supply; 9. Panel controller. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0039] This application discloses a mobile biosafety pretreatment device suitable for on-site operations.

[0040] Reference Figures 1-3 A mobile biosafety pretreatment device suitable for on-site operations includes a portable protective case 1. A front cover 12 is mounted on the top of the protective case 1 via a hinge. An integrally formed magnetic gasket 13 is fixedly connected to the protective case 1 at a position corresponding to the sealing edge of the front cover 12. The magnetic gasket 13 is positioned between the protective case 1 and the front cover 12. Two or more circular operating holes 11 are provided on the front side of the protective case 1. A glove 3 is detachably installed in each operating hole 11, with its outer ring sealed to the inner wall of the operating hole 11. An optical disinfection unit 16, which is an ultraviolet germicidal lamp, is fixedly connected to the inner top surface of the protective case 1. A sample transfer box 14 for holding samples is pulled out from the bottom of the back of the box 1. A flip cover 15 is rotatably connected to the top of the sample transfer box 14. The sample transfer box 14 is drawer-shaped. A sealing gasket is fixedly provided at the part of the sample transfer box 14 that contacts the outer wall of the protective box 1. When the sample transfer box 14 is pushed into the inner cavity of the protective box 1, the outer wall of the sample transfer box 14 is sealed to the protective box 1 through the sealing gasket. One end of the sample transfer box 14 with the flip cover 15 is located in the inner cavity of the protective box 1, which facilitates the use of the sample in the sample transfer box 14. The other end of the sample transfer box 14 is located outside the protective box 1, which facilitates the pushing and pulling operation of the sample transfer box 14.

[0041] The portable protective case 1 is easy to carry and move manually. The front cover 12, connected to the protective case 1 via a top hinge, facilitates opening and closing. An integrated magnetic pad 13 at the junction of the protective case 1 and the front cover 12 ensures airtightness when the front cover 12 is closed. Two or more circular operating holes 11 on the front side of the protective case 1, along with a sealed glove 3, constitute a sterile operating port, allowing the operator to perform sample operations without disrupting the internal sterile environment. An optical sterilization unit 16, fixed to the top surface inside the protective case 1, is used for sterilization of the protective case. The gas and surface inside the box 1 are sterilized to create a sterile environment in advance. The sample transfer box 14 and its flip cover 15, which are connected to the lower back of the protective box 1 by a pull-out design, form a two-way sealed sample transfer channel. When the sample transfer box 14 is pushed in, the outer wall of the sample transfer box 14 is sealed to the protective box 1. The sample can be taken out by opening the flip cover 15 at the end inside the protective box 1, while the sample can be easily pushed and pulled by the operator at the end outside the protective box 1. This design realizes the safe transfer of samples in an isolated state and greatly reduces the risk of cross-contamination.

[0042] refer to Figure 4 , Figure 5 A portable processing box 2 is detachably connected to one side of the protective box 1. The processing box 2 contains an absorption tank 22 for holding the absorbent liquid, a filter membrane treatment seat 6 for physically adsorbing harmful substances, and a filtration pump 7 for providing gas flow. A first pipe 4 and a second pipe 5 are fixedly connected to the upper part of the inner cavity of the protective box 1. A one-way valve is fixedly connected to the inner cavity of the end of the first pipe 4. The first pipe 4 is inserted from the top of the absorption tank 22 into the absorbent liquid at the bottom of the absorption tank 22. The end of the second pipe 5 is connected to the air inlet of the filter membrane treatment seat 6. The housing of the filter pump 7 is fixedly connected to the inner bottom surface of the treatment box 2. The inlet of the filter pump 7 is fixedly connected to the suction pipe 71. The end of the suction pipe 71 is fixedly connected to the multi-way solenoid valve 72. The multi-way solenoid valve 72 can be a miniature electromagnetic three-way valve. The multi-way solenoid valve 72 is fixedly connected inside the treatment box 2. The multi-way solenoid valve 72 is fixedly connected to the connecting pipe 73 for connecting to the absorption tank 22 and the flexible hose 74 for connecting to the filter membrane treatment seat 6. The upper part of the absorption tank 22 is fixedly connected to the air guide pipe 26. The connecting pipe 73 and the air guide pipe 26 are fixedly connected.

[0043] The portable processing box 2 is also easy to carry and move manually. The detachable filter pump 7 inside the processing box 2 is connected to one side of the protective box 1 as the power source. The filter pump 7 can be an FDP series small diaphragm vacuum pump. It is connected to the multi-way solenoid valve 72 through the air extraction pipe 71. The multi-way solenoid valve 72 is the core of the airflow path control. It is connected to the air guide pipe 26 at the top of the absorption tank 22 through the connecting pipe 73, and at the same time connected to the air outlet of the filter membrane treatment seat 6 through the hose 74. The first pipe 4 and the second pipe 5 above the inner cavity of the protective box 1 provide two independent processing paths. One path introduces the gas that may contain harmful aerosols into the liquid at the bottom of the absorption tank 22 through the first pipe 4 for bubbling chemical absorption. The other path guides the gas to the filter membrane treatment seat 6 for physical filtration through the second pipe 5. This application can selectively perform chemical absorption or physical adsorption treatment on the gas in the protective box 1 by switching the multi-way solenoid valve 72. The one-way valve set at the end of the first pipe 4 can effectively prevent the liquid in the first pipe 4 from flowing back.

[0044] refer to Figure 4 , Figure 5 A filling pipe 23 is fixedly installed on one side of the treatment box 2. The outlet end of the filling pipe 23 is connected to the inner cavity of the absorption tank 22. A sealing cap 24 is threadedly connected to the top of the filling pipe 23. The top opening of the filling pipe 23 is lower than the inner top surface of the absorption tank 22. A drain valve 25 is fixedly connected to the lower side of one side of the treatment box 2. One end of the drain valve 25 is connected to the bottom surface of the inner cavity of the absorption tank 22. A door 21 is rotatably connected to one side of the treatment box 2. A portable power supply 8 is fixedly connected to the inner bottom surface of the treatment box 2 near the door 21. The portable power supply 8 is a lithium-ion battery pack. A panel controller 9 is fixedly connected above the portable power supply 8 in the treatment box 2. The portable power supply 8 provides working power for the ultraviolet germicidal lamp, the vacuum pump 7 and the multi-way solenoid valve 72. The panel controller 9 is electrically connected to the portable power supply 8 and is used to set the ultraviolet irradiation time, control the start and stop and power of the vacuum pump 7, and switch the passage status of the multi-way solenoid valve 72 to achieve centralized control.

[0045] The filling pipe 23 and sealing cap 24 fixed on the treatment tank 2, together with the design that the top of the filling pipe 23 is lower than the inner top surface of the absorption tank 22, form an overflow-proof filling port, which facilitates safe replenishment or replacement of the absorption liquid while maintaining a seal. The drain valve 25 connected to the bottom of the absorption tank 22 is used to safely discharge the waste liquid after use. The rotating door 21 facilitates maintenance of the inside of the treatment tank 2. The portable power supply 8 fixed inside the tank provides independent mobile power for the ultraviolet germicidal lamp, the filtration pump 7, and the multi-way solenoid valve 72. The panel controller 9 connected to the portable power supply 8 serves as the central control unit, integrating automated control of functions such as disinfection, filtration, and airflow path switching. Users can conveniently operate the entire system and set relevant parameters through the panel, which improves the integration, portability, and ease of operation of this application.

[0046] refer to Figure 6 The filter membrane treatment seat 6 includes a cylindrical fixed seat 61 and a movable seat 66. The top of the fixed seat 61 is fixedly connected to the treatment box 2 via a fixing frame. A circular magnet 67 is coaxially fixedly connected to the top of the movable seat 66. The fixed seat 61 is made of stainless steel that can be attracted by the magnet 67. The movable seat 66 is quickly assembled and disassembled from the fixed seat 61 via the magnet 67. The lower outer ring of the fixed seat 61 is fitted into the magnet 67. A first V-shaped sealing surface 62 is provided on the lower part of the fixed seat 61. The middle part of the first V-shaped sealing surface 62 protrudes downward in a V-shape. The upper part of the movable seat 66... A second V-shaped sealing surface 68 is provided, with the middle part of the second V-shaped sealing surface 68 being V-shaped and concave downwards. A circular filter membrane 65 is clamped and connected between the first V-shaped sealing surface 62 in the fixed seat 61 and the second V-shaped sealing surface 68 in the movable seat 66. A first circular hole 63 is coaxially provided in the fixed seat 61. An inlet pipe 64 is fixedly connected above the first circular hole 63 in the fixed seat 61. The inlet pipe 64 is fixedly connected to the second pipe 5. A second circular hole 69 is coaxially provided in the movable seat 66. The lower part of the second circular hole 69 in the movable seat 66 is fixedly connected to one end of the hose 74.

[0047] The filter membrane treatment seat 6 consists of a fixed seat 61 and a movable seat 66. The fixed seat 61 is securely connected to the treatment box 2 via a fixing frame. The fixed seat 61 is made of stainless steel with magnetic conductivity, which allows it to magnetically attract the annular magnet 67 on the movable seat 66, enabling the movable seat 66 to quickly close and separate from the fixed seat 61. This greatly facilitates the loading and unloading of the circular filter membrane 65. The first V-shaped sealing surface 62 below the fixed seat 61 and the second V-shaped sealing surface 68 above the movable seat 66 interlock, tightly clamping the circular filter membrane 65 under magnetic force and ensuring its central area... The V-shaped folds in the field not only provide excellent circumferential sealing to prevent air leakage, but more importantly, they significantly increase the effective filtration area of ​​the circular filter membrane 65, thereby improving the particulate matter capture efficiency. The first circular hole 63 in the fixed seat 61, together with the upper inlet pipe 64 and the second pipe 5, constitutes an air intake channel. The second circular hole 69 in the movable seat 66, together with the lower hose 74 and the multi-way solenoid valve 72, constitutes an air outlet channel. The gas flows through the circular filter membrane 65 held by the first V-shaped sealing surface 62 and the second V-shaped sealing surface 68 to complete the filtration process.

[0048] The implementation principle of the mobile biosafety pretreatment device applicable to on-site operations in this application embodiment is as follows: In outdoor sites such as farmers' markets, the front cover 12 of the protective box 1 is opened, tools are placed in and then closed, and sealed by the magnetic gasket 13. The optical sterilization unit 16 is activated through the panel controller 9 to sterilize the inside of the protective box 1. Subsequently, the samples collected on-site are safely transferred into the protective box 1 through the pull-out sample transfer box 14. The operator puts their hands into the gloves 3 on the operation hole 11 and completes the pretreatment operations such as weighing, grinding, and dilution of the samples in the sealed and sterile space of the protective box 1. The processed samples are sealed and transferred out through the sample transfer box 14 and immediately placed in an insulated box to be sent to the laboratory. This process effectively controls the impact of the environment on the samples and protects the safety of the operators.

[0049] When handling high-risk aflatoxin samples in the laboratory, all operations are performed within the sealed space of the protective chamber 1 using gloves 3. Any toxin-containing aerosols generated during the operation are processed via the panel controller 9. The multi-way solenoid valve 72 is switched to the path connecting to the absorption tank 22. The filtration pump 7 draws the gas from the chamber into the absorption liquid in the absorption tank 22 through the first pipe 4, where the toxin is chemically neutralized. For further verification and purification, the multi-way solenoid valve 72 is switched to the path connecting to the filter membrane treatment seat 6, and the gas enters through the second pipe 5, sealed by the first V-shaped seal. The circular filter membrane 65, held between the second V-shaped sealing surface 62 and the second V-shaped sealing surface 68, captures residual toxins. After physical adsorption treatment, the circular filter membrane 65 can be removed. Then, using existing mature technologies such as immunochromatographic test strips or portable fluorescence detectors, the harmful substances trapped on the circular filter membrane 65 can be quickly detected on-site. This verifies and monitors the gas purification effect, ensuring that the toxin concentration in the protective box 1 is below the safety standard before opening the front cover 12. This process achieves on-site harmless treatment and verification of toxins, avoiding laboratory contamination.

[0050] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mobile biosafety pretreatment device suitable for on-site operations, characterized in that: Includes a portable protective case (1), the interior of which is equipped with an optical disinfection unit (16); The protective box (1) is provided with a front cover (12) that can be opened and closed. The protective box (1) has two or more operating holes (11) on its front side. Gloves (3) are sealed on the inner wall of the operating holes (11). The sample transfer box (14) is pulled out from the bottom of the back of the protective box (1). A flip cover (15) is provided on the top of the sample transfer box (14). When the sample transfer box (14) is pushed into the inner cavity of the protective box (1), one end of the sample transfer box (14) with the flip cover (15) is located in the inner cavity of the protective box (1), and the other end of the sample transfer box (14) is located outside the protective box (1).

2. The mobile biosafety pretreatment device suitable for on-site operations according to claim 1, characterized in that: The protective box (1) has a processing box (2) on one side. The processing box (2) contains an absorption tank (22), a filter membrane treatment seat (6), and a vacuum pump (7). The upper part of the inner cavity of the protective box (1) is connected to a first pipe (4) and a second pipe (5). The first pipe (4) is inserted from the top of the absorption tank (22) and connected to the bottom of the absorption tank (22). A one-way valve is installed in the inner cavity at the end of the first pipe (4). The second pipe (5) is connected to the air inlet of the filter membrane treatment seat (6). A multi-way solenoid valve (72) is provided above the vacuum pump (7). The inlet of the vacuum pump (7) is connected to the outlet of the multi-way solenoid valve (72). The inlet of the vacuum pump (7) is connected to the outlet of the filter membrane treatment seat (6) or the gas above the inner cavity of the absorption tank (22) through the multi-way solenoid valve (72).

3. The mobile biosafety pretreatment device suitable for on-site operations according to claim 2, characterized in that: The processing box (2) is provided with a filling pipe (23) on one side. The filling pipe (23) is connected to the inner cavity of the absorption tank (22). A sealing cap (24) is detached and connected to the top of the filling pipe (23). The top of the filling pipe (23) is lower than the inner top surface of the absorption tank (22).

4. The mobile biosafety pretreatment device suitable for on-site operations according to claim 2, characterized in that: The filter membrane treatment seat (6) includes a fixed seat (61) and a movable seat (66). The fixed seat (61) is fixedly connected to the treatment box (2). A ring-shaped magnet (67) is fixedly connected to the upper part of the movable seat (66). The movable seat (66) is connected to the fixed seat (61) through the magnet (67). The lower part of the fixed seat (61) is fitted into the magnet (67). A circular filter membrane (65) is clamped and connected between the fixed seat (61) and the movable seat (66).

5. The mobile biosafety pretreatment device suitable for on-site operations according to claim 4, characterized in that: The fixed seat (61) is provided with a first round hole (63), and an inlet pipe (64) connected to the second pipe (5) is fixedly connected above the first round hole (63) in the fixed seat (61). The movable seat (66) is provided with a second round hole (69), and a flexible hose (74) connected to the multi-way solenoid valve (72) is fixedly connected below the second round hole (69) in the movable seat (66).

6. The mobile biosafety pretreatment device suitable for on-site operations according to claim 2, characterized in that: A drain valve (25) is provided on one side of the treatment tank (2), and one end of the drain valve (25) is connected to the inner cavity of the absorption tank (22).

7. The mobile biosafety pretreatment device suitable for on-site operations according to claim 1, characterized in that: A magnetic pad (13) is integrally formed between the protective box (1) and the front cover (12). The magnetic pad (13) is installed on the protective box (1) at the position corresponding to the sealing edge end face of the front cover (12).

8. The mobile biosafety pretreatment device suitable for on-site operations according to claim 4, characterized in that: The fixed seat (61) has a downwardly protruding first V-shaped sealing surface (62) below it, and the movable seat (66) has a downwardly recessed second V-shaped sealing surface (68) above it.

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