Biological safety cabinet with filter screen convenient to replace

Abstract

The utility model relates to the technical field of biosafety cabinets, and discloses a biosafety cabinet convenient to replace a filter screen, which comprises a fixed bottom plate, a biosafety cabinet main body and an air supply box, an air supply fan is mounted at the top end of the air supply box, and a filter screen is fixed in a flow distribution hole. The air supply box is installed at the top end of the biological safety cabinet body, the air supply fan is used for supplying air in the working process, air is filtered through the air filter in the air supply process, and when the air filter is used for a period of time and needs to be replaced and cleaned, the air filter can be moved out after the handle is held. The air filter is moved out of the slot after moving along the limiting plate, then the air filter is correspondingly cleaned or replaced, and then the air filter is re-inserted from the slot and is re-mounted along the limiting plate; and the sealing blocks are used for sealing the side edges, so that the overall replacement and cleaning convenience is better improved in the working process.

Description

Technical Field

[0001] The utility model relates to the technical field of biological safety cabinets, in particular to a biological safety cabinet which is convenient for replacing a filter net. Background Art

[0002] The biological safety cabinet is one of the most important safety equipment in biological laboratories. It is used to protect laboratory personnel, experimental items and the surrounding environment from biological hazards, prevent the spread of microorganisms through the air, and protect laboratory personnel and the surrounding environment from contamination. Generally speaking, workers will wear protective equipment such as gloves and masks when working. Since the biological safety cabinet is a safety protection equipment used in the laboratory, it will be widely used in scientific research in the fields of microbiology, biomedicine, and biological products.

[0003] Based on the use of biological safety cabinets, they are generally composed of two parts: a cabinet and a bracket. In order to ensure its safety during operation, an air filtration system is generally installed in the cabinet, and an air filter plate is used to complete the air filtration work, so that the air flow in the cabinet is always in a flowing state. After a period of use, the air filter plate is prone to dust accumulation and blockage. If it is inconvenient to replace and clean it, it will easily affect the subsequent working effect of the biological safety cabinet. Utility Model Content

[0004] The utility model aims to provide a biosafety cabinet with an easy-to-replace filter screen, so as to solve the problem in the above-mentioned background technology that the air filter plate is prone to dust accumulation and clogging after being used for a period of time. If it is inconvenient to replace and clean it, it is easy to affect the subsequent working effect of the biosafety cabinet.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biological safety cabinet that is easy to replace a filter net, comprising a fixed bottom plate, a biological safety cabinet main body, and an air supply box, an air supply fan is installed on the top of the air supply box, limit plates are installed on the front and rear ends of the inner wall of the air supply box, an air filter is connected between the limit plates, a fixed block is fixed on one side of the air filter, a sealing plate is fixed on one side of the fixed block, a handle is fixed on one side of the sealing plate, a slot is opened inside one side of the air supply box, a sealing block is fixed on the other side of the sealing plate, connecting blocks are installed on both sides of the top of the inner wall of the biological safety cabinet main body, a flow distribution pipe is installed between the connecting blocks, flow distribution holes are opened inside the top and bottom ends of the flow distribution pipe, and a filter net is fixed inside the flow distribution hole.

[0006] Furthermore, the flow distribution holes are evenly distributed inside the flow distribution tube, and the connection blocks are symmetrically distributed about the central axis of the flow distribution tube.

[0007] Furthermore, the limit plates are symmetrically distributed about the central axis of the air supply box, and notches are provided inside the top end of the biosafety cabinet body and inside the bottom end of the air supply box.

[0008] Preferably, ultraviolet lamp tubes are installed at the back end of the biological safety cabinet body, and two groups of ultraviolet lamp tubes are installed inside the biological safety cabinet body.

[0009] Preferably, an operating platform is fixed to the bottom end of the interior of the biological safety cabinet body, exhaust strips are installed on both sides of the operating platform, an air inlet pipe is opened inside the top of the exhaust strip, a side exhaust hole is opened inside one side of the exhaust strip, exhaust pipes are installed at positions near the bottom end on both sides of the biological safety cabinet body, and a filter plate is installed inside the exhaust strip.

[0010] Furthermore, the air inlet pipe is evenly distributed inside the top end of the exhaust strip, one side of the exhaust pipe is connected to the inside of the exhaust strip, and two groups of side exhaust holes are evenly distributed inside one side of the exhaust strip.

[0011] Preferably, adjusting columns are installed on both sides of the top of the fixed base plate, a guide groove is opened inside one side of the adjusting column, a guide rod is installed inside one of the adjusting columns, the outer wall of the guide rod is connected to a guide block, a threaded column is installed inside the other adjusting column, the outer wall of the threaded column is connected to a threaded block, and a servo motor is installed on the top of the threaded column.

[0012] Furthermore, a threaded connection is formed between the threaded block and the threaded column, one side of the threaded block and the guide block are connected to support legs, and a cross bar is installed between the support legs.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the biosafety cabinet that is easy to replace the filter net not only improves the convenience of filter replacement, but also improves the operating height adjustment ability and flow distribution ability of the biosafety cabinet;

[0014] (1) The air supply box is installed at the top of the main body of the biological safety cabinet, and the air supply fan is used to supply air during operation. The air will be filtered through the air filter, and a slot is provided inside one side of the air supply box. Limiting plates are fixed at the front and rear ends of the inner wall of the air supply box. Therefore, the limiting plate is used to locate the position of the air filter. When the air filter needs to be replaced and cleaned after being used for a period of time, the handle can be held and moved outward, and the air filter can be moved along the limiting plate and then moved out of the slot. Then, the air filter can be cleaned or replaced accordingly, and then the air filter can be re-inserted from the slot and re-installed along the limiting plate. The sealing block can be used to seal the side, thereby improving the overall convenience of replacement and cleaning during the work process;

[0015] (2) By installing the adjustment column on both sides of the top of the fixed bottom plate, the threaded column can be driven to rotate after the servo motor is started. At this time, the threaded column and the threaded block cooperate with each other to form a thread path. Under the connection of the supporting legs, the guide rod and the guide block cooperate to perform the guiding work. Therefore, the height of the biological safety cabinet body from the ground can be adjusted during the operation, thereby improving the adjustment ability of the operating height;

[0016] (3) The flow distribution holes are evenly distributed inside the top and bottom of the flow distribution pipe, so that the flow is evenly distributed. After the flow is distributed, it circulates inside the main body of the biological safety cabinet and is discharged at the position of the air inlet pipe. After being filtered by the filter plate inside the exhaust strip, it is finally discharged at the position of the exhaust pipe, thereby forming a better inlet and outlet flow distribution work, ensuring that the airflow in the main body of the biological safety cabinet is in a state of long-term circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a partial front view cross-sectional structural diagram of the air delivery box of the utility model;

[0019] Figure 3 It is a schematic diagram of the top view structure of the flow distribution pipe of the utility model;

[0020] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged cross-section structure at point A in the middle.

[0021] In the figure: 1. fixed bottom plate; 2. cross bar; 3. operating platform; 4. adjusting column; 5. guide rod; 6. guide block; 7. supporting leg; 8. main body of biological safety cabinet; 9. ultraviolet lamp; 10. connecting block; 11. air supply box; 12. air supply fan; 13. air filter; 14. distribution flow pipe; 15. servo motor; 16. threaded block; 17. threaded column; 18. guide groove; 19. limit plate; 20. sealing block; 21. sealing plate; 22. handle; 23. slot; 24. fixed block; 25. distribution flow hole; 26. filter screen; 27. exhaust strip; 28. filter plate; 29. ​​side exhaust hole; 30. exhaust pipe; 31. air inlet pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides an embodiment: a biosafety cabinet for facilitating replacement of a filter net, comprising a fixed bottom plate 1, a biosafety cabinet body 8, and an air supply box 11, an air supply fan 12 is installed at the top of the air supply box 11, limit plates 19 are installed at the front and rear ends of the inner wall of the air supply box 11, an air filter 13 is connected between the limit plates 19, a fixed block 24 is fixed on one side of the air filter 13, a sealing plate 21 is fixed on one side of the fixed block 24, a handle 22 is fixed on one side of the sealing plate 21, a slot 23 is opened inside one side of the air supply box 11, a sealing block 20 is fixed on the other side of the sealing plate 21, connecting blocks 10 are installed on both sides of the top of the inner wall of the biosafety cabinet body 8, and a flow distribution pipe 14 is installed between the connecting blocks 10, and flow distribution holes 25 are opened inside the top and bottom ends of the flow distribution pipe 14, and a filter net 26 is fixed inside the flow distribution hole 25.

[0024] The flow distribution holes 25 are evenly distributed inside the flow distribution tube 14 , and the connecting blocks 10 are symmetrically distributed about the central axis of the flow distribution tube 14 .

[0025] The limiting plates 19 are symmetrically distributed about the central axis of the air supply box 11 , and notches are provided inside the top end of the biosafety cabinet body 8 and inside the bottom end of the air supply box 11 .

[0026] Ultraviolet lamp tubes 9 are installed at the back end of the biological safety cabinet body 8 , and two groups of ultraviolet lamp tubes 9 are installed inside the biological safety cabinet body 8 .

[0027] An operating platform 3 is fixed to the bottom end of the biological safety cabinet body 8, exhaust strips 27 are installed on both sides of the operating platform 3, an air inlet pipe 31 is opened inside the top of the exhaust strip 27, and a side exhaust hole 29 is opened inside one side of the exhaust strip 27. Exhaust pipes 30 are installed near the bottom end on both sides of the biological safety cabinet body 8, and a filter plate 28 is installed inside the exhaust strip 27.

[0028] The air inlet pipe 31 is evenly distributed inside the top of the exhaust strip 27 , one side of the exhaust pipe 30 is connected to the inside of the exhaust strip 27 , and two groups of side exhaust holes 29 are evenly distributed inside one side of the exhaust strip 27 .

[0029] Adjusting columns 4 are installed on both sides of the top of the fixed base plate 1, and a guide groove 18 is opened inside one side of the adjusting column 4. A guide rod 5 is installed inside one adjusting column 4, and the outer wall of the guide rod 5 is connected to a guide block 6. A threaded column 17 is installed inside the other adjusting column 4, and the outer wall of the threaded column 17 is connected to a threaded block 16. A servo motor 15 is installed on the top of the threaded column 17.

[0030] A threaded connection is formed between the threaded block 16 and the threaded column 17. Support legs 7 are connected to one side of the threaded block 16 and the guide block 6. A crossbar 2 is installed between the support legs 7.

[0031] Furthermore, the operating platform 3 is an operating position for the staff, and the height of the operating platform 3 is flush with the height of the exhaust strip 27 .

[0032] Working principle: First, when working, the staff starts the servo motor 15 to drive the threaded column 17 to rotate according to their height comfort. At this time, the threaded column 17 and the threaded block 16 cooperate with each other to form a threaded path. Under the connection of the support leg 7, the guide rod 5 and the guide block 6 are used to cooperate for guiding work, so as to adjust the height of the biological safety cabinet body 8 from the ground, and then the air supply fan 12 is used to work for air supply. When supplying air, it will be filtered through the air filter 13, and the flow holes 25 will be used to evenly distribute the flow. After the flow is distributed, it will circulate inside the biological safety cabinet body 8, and then the airflow will reach the position of the air inlet pipe 31. After being filtered by the filter plate 28 inside the exhaust strip 27, it will be finally discharged at the position of the exhaust pipe 30, so as to ensure the long-term circulation of the airflow in the biological safety cabinet body 8.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A biosafety cabinet for facilitating replacement of a filter screen, comprising a fixed bottom plate (1), a biosafety cabinet body (8), and an air supply box (11), characterized in that: An air supply fan (12) is installed at the top of the air supply box (11), and limit plates (19) are installed at the front and rear ends of the inner wall of the air supply box (11), and an air filter (13) is connected between the limit plates (19). A fixing block (24) is fixed on one side of the air filter (13), and a sealing plate (21) is fixed on one side of the fixing block (24), and a handle (22) is fixed on one side of the sealing plate (21). A slot (23) is provided inside one side of the air supply box (11), and a sealing block (20) is fixed on the other side of the sealing plate (21). Connecting blocks (10) are installed on both sides of the top of the inner wall of the biological safety cabinet body (8), and a flow distribution pipe (14) is installed between the connecting blocks (10). Flow distribution holes (25) are provided inside the top and bottom ends of the flow distribution pipe (14), and a filter screen (26) is fixed inside the flow distribution hole (25).

2. A biosafety cabinet for easy replacement of filter nets according to claim 1, characterized in that: The flow distribution holes (25) are evenly distributed inside the flow distribution tube (14), and the connection blocks (10) are symmetrically distributed about the central axis of the flow distribution tube (14).

3. A biosafety cabinet for easy replacement of filter nets according to claim 1, characterized in that: The limiting plates (19) are symmetrically distributed about the central axis of the air supply box (11), and notches are provided inside the top end of the biological safety cabinet body (8) and inside the bottom end of the air supply box (11).

4. A biosafety cabinet for easy replacement of filter nets according to claim 1, characterized in that: An ultraviolet lamp tube (9) is installed at the back end of the biological safety cabinet body (8), and two groups of ultraviolet lamp tubes (9) are installed inside the biological safety cabinet body (8).

5. A biosafety cabinet for easy replacement of filter nets according to claim 1, characterized in that: An operating platform (3) is fixed at the bottom of the biological safety cabinet body (8), exhaust strips (27) are installed on both sides of the operating platform (3), an air inlet pipe (31) is opened inside the top of the exhaust strip (27), a side exhaust hole (29) is opened inside one side of the exhaust strip (27), exhaust pipes (30) are installed at positions close to the bottom of both sides of the biological safety cabinet body (8), and a filter plate (28) is installed inside the exhaust strip (27).

6. A biosafety cabinet for easy replacement of filter nets according to claim 5, characterized in that: The air inlet pipe (31) is evenly distributed inside the top end of the exhaust strip (27), one side of the exhaust pipe (30) is connected to the inside of the exhaust strip (27), and two groups of side exhaust holes (29) are evenly distributed inside one side of the exhaust strip (27).

7. A biosafety cabinet for easy replacement of filter nets according to claim 1, characterized in that: Adjustment columns (4) are installed on both sides of the top of the fixed base plate (1), a guide groove (18) is provided inside one side of the adjustment column (4), a guide rod (5) is installed inside one of the adjustment columns (4), the outer wall of the guide rod (5) is connected to a guide block (6), a threaded column (17) is installed inside the other adjustment column (4), the outer wall of the threaded column (17) is connected to a threaded block (16), and a servo motor (15) is installed at the top of the threaded column (17).

8. A biosafety cabinet for easy replacement of filter nets according to claim 7, characterized in that: A threaded connection is formed between the threaded block (16) and the threaded column (17); one side of the threaded block (16) and the guide block (6) are both connected to support legs (7); and a cross bar (2) is installed between the support legs (7).

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