A biological safety cabinet

Abstract

The present application relates to the technical field of laboratory equipment, and provides a biological safety cabinet, comprising: a cabinet body, the cabinet body being provided with a cabinet cavity and a cabinet door; a storage plate, which is parallel to the cabinet door and fixedly arranged in the cabinet body, and the storage rack being provided with a plurality of storage holes for matching test tubes; a safety shield, the safety shield being in one-to-one correspondence with the storage holes, and being arranged on a side of the storage rack facing the cabinet door; the cabinet door being provided with an air intake filter structure and a sealing cover matching with the safety shield, and the air intake filter structure being connected with the sealing cover; a support plate, which is located on a side of the storage plate away from the cabinet door, and the support plate being fixedly provided with a support layer, and the support layer being provided with support grooves corresponding to the storage holes; a manifold, the two ends of the manifold being respectively connected with an air intake duct and an air outlet duct, the air intake duct being provided with an air intake pump, the manifold being provided with a venturi tube corresponding to the safety shield, and the air inlet of the venturi tube being connected with the safety shield.

Description

Technical Field

[0001] The present application relates to the technical field of laboratory equipment, and in particular to a biological safety cabinet. Background Art

[0002] Biological safety cabinets are designed to protect operators, laboratory environments and experimental materials when operating infectious experimental materials such as primary cultures, bacterial strains and diagnostic specimens, so as to avoid aerosols and splashes that may cause infection. They are widely used in scientific research, teaching, clinical testing and production in the fields of microbiology, biomedicine, genetic engineering, biological products, etc., and are the most basic safety protection equipment in the first-level protection barrier for laboratory safety.

[0003] In the related art, a biosafety cabinet generally consists of a box and a bracket. An air filtration system is configured inside the box. The air filtration system includes an air inlet channel and an air outlet channel. External air enters the biosafety cabinet through the air inlet channel and is discharged to the outside of the laboratory from the air outlet channel. However, in some laboratories, the samples placed in the biosafety cabinet are of many types and small in number, and different samples have different requirements for ventilation environment. Existing biosafety cabinets cannot meet the environmental requirements of each sample. Summary of the invention

[0004] The purpose of the present application is to provide a biosafety cabinet that can store a variety of samples and meet the ventilation environment requirements of the various samples.

[0005] The above application objectives of this application are achieved through the following technical solutions:

[0006] The present application provides a biological safety cabinet that adopts the following technical solution.

[0007] A biological safety cabinet, comprising:

[0008] A cabinet body, wherein the cabinet body is provided with a cabinet cavity and a cabinet door;

[0009] A storage plate is parallel to the cabinet door and fixedly arranged in the cabinet, and the storage plate is provided with a plurality of storage holes for matching the test tubes;

[0010] A safety shield, which corresponds to the storage hole one by one and is arranged on the side of the storage plate facing the cabinet door; the cabinet door is equipped with an air intake filter structure and a sealing cover that cooperates with the safety shield, and the air intake filter structure is connected to the sealing cover;

[0011] The support plate is located on a side of the storage plate away from the cabinet door, and the support plate is fixedly provided with a support layer, and the support layer is provided with a support groove corresponding to the storage hole;

[0012] A conduit, wherein both ends of the conduit are respectively connected to an air inlet duct and an air outlet duct, the air inlet duct is provided with an air intake pump, and the conduit is provided with a venturi tube corresponding to the safety shield, and the air inlet of the venturi tube is connected to the safety shield.

[0013] In a preferred embodiment, the air inlet of the venturi tube is connected to the safety shield through an air inlet pipe, and the air inlet pipe is detachably connected to the storage plate.

[0014] In a preferred embodiment, the storage plate is provided with a replacement groove, and the air inlet pipe is connected to the storage plate via the replacement groove.

[0015] In a preferred embodiment, the storage plate is provided with a protective cover, which corresponds to the replacement slot one by one and is used to cooperate with the storage plate to seal the replacement slot.

[0016] In a preferred embodiment, the sealing cover side wall is provided with a connecting hole, the air intake filter structure is connected to the sealing cover through the connecting hole, and the sealing cover is filled with a second filter cotton.

[0017] In a preferred embodiment, the cabinet door includes an outer panel and an inner panel, the outer panel and the inner panel are provided with ventilation holes, and the air intake filter structure includes a first filter cotton arranged between the outer panel and the inner panel.

[0018] In a preferred embodiment, the second filter cotton is glass fiber filter cotton, and the filling height of the glass fiber filter cotton is higher than the height of the connecting hole.

[0019] In a preferred embodiment, a storage cavity is further provided in the cabinet cavity. The storage cavity is located on a side of the storage plate away from the cabinet door, and a storage plate is fixedly provided in the storage cavity.

[0020] In a preferred embodiment, the storage board is configured with multiple layers, and the multiple layers of storage board are fixed in the storage cavity by vertical fixing columns.

[0021] In a preferred embodiment, an air inlet cavity is arranged at the top of the cabinet cavity, the air inlet duct is arranged in the air inlet cavity, the air intake pump is arranged outside the cabinet body, the air outlet duct extends from the bottom of the storage plate into the storage cavity, and an air exhaust port is arranged at the top of the storage cavity.

[0022] In summary, the present application includes the following beneficial effects: the cooperation between the safety shield and the manifold enables the discharge of gas in the safety shield during the ventilation process of the manifold; by setting the air inlet pipe as a detachable connection storage plate, the air flow rate in each safety shield can be adjusted by adjusting the ventilation aperture of the air inlet pipe, thereby achieving safe storage of a variety of volatile items. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the biological safety cabinet in the embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the manifold and the safety shield on the storage plate in an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the structure of the storage plate and the support plate in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the cabinet door structure in an embodiment of the present application.

[0027] Figure 5 yes Figure 4 Enlarged view of part A in .

[0028] Explanation of the accompanying drawings: 1. Cabinet body; 11. Storage cavity; 12. Storage plate; 2. Bracket; 3. Storage plate; 31. Storage hole; 32. Safety shield; 33. Confluence pipe; 331. Venturi tube; 34. Replacement slot; 35. Air inlet pipe; 4. Support plate; 41. Support layer; 5. Cabinet door; 51. Sealing cover; 511. Connecting hole; 512. Second filter cotton; 52. Outer plate; 53. Inner plate; 54. First filter cotton; 55. Vent hole; 6. Test tube; 7. Inlet duct; 8. Outlet duct. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0031] Reference Figure 1The present application provides a biological safety cabinet, which can safely store a variety of items. The safety cabinet includes a cabinet body 1 and a bracket 2. The cabinet body 1 is arranged on the bracket 2 and supported on the ground by the bracket 2. A cabinet cavity is arranged in the cabinet body 1, and a storage plate 3 and a support plate 4 are fixedly arranged in the cabinet cavity. The storage plate 3 and the support plate 4 are parallel to the cabinet door 5. The storage plate 3 is located between the support plate 4 and the cabinet door 5. The storage plate 3 is provided with a plurality of storage holes 31. Test tubes 6 for storing items are placed on the storage plate 3 through the storage holes 31. The cabinet door 5 is provided with a sealing cover 51 corresponding to the storage holes 31. When the cabinet door 5 is closed, different test tubes 6 are isolated by the sealing cover 51. A manifold 33 is provided on the storage plate 3, and the volatile gas of each test tube 6 is discharged through the manifold 33.

[0032] Since the sealing cover 51 corresponds to the storage hole 31 one by one, safe isolation of different stored items is achieved, thereby improving the storage capacity of the safety cabinet for volatile items.

[0033] Reference Figure 2 and Figure 3 , the manifold 33 is provided with multiple groups. In a preferred example, multiple groups of manifolds 33 are vertically arranged in the storage plate 3, and the storage holes 31 connected to each manifold 33 are vertically arranged on the same side of the manifold 33. The manifold 33 is provided with a venturi tube 331 corresponding to each storage hole 31, and the air inlet of the venturi tube 331 is connected to the storage hole 31. When the manifold 33 is ventilated, the gas volatilized in the test tube 6 is sucked into the manifold 33 through the venturi tube 331 and discharged to the outside of the cabinet 1.

[0034] Among them, a safety shield 32 and a replacement slot 34 connected to the safety shield 32 are fixedly arranged on the storage plate 3 corresponding to each storage hole 31, and the air inlet of the venturi tube 331 is connected to the inside of the safety shield 32 through the air inlet pipe 35, and the air inlet pipe 35 is detachably connected to the replacement slot 34. Further, the air inlet pipe 35 is clamped with the replacement slot 34.

[0035] By providing a detachably connected air intake pipe 35, air intake pipes 35 with different apertures can be installed in the replacement slot 34, so as to achieve the adjustment of the air absorption efficiency of the venturi tube 331 in the safety shield 32. During use, the air intake pipe 35 with an appropriate aperture can be installed in the replacement slot 34 according to the needs of the staff, for example, the air intake pipe 35 is a solid air intake pipe 35, so as to close the safety shield 32; for example, the air intake pipe 35 with a larger aperture is replaced, so as to increase the efficiency of air discharge at the corresponding position. During the ventilation process of the manifold 33, the venturi tube 331 located on the same manifold 33 will reduce the air pressure in the manifold 33. Therefore, the more venturi tubes 331 are connected to the same manifold 33, the less air is discharged through the venturi effect. By adjusting the aperture of the air intake pipe 35, the ventilation effect of the items in the specific test tube 6 can be adjusted.

[0036] Furthermore, each replacement slot 34 is provided with a protective cover (not shown in the figure), which corresponds to the replacement slot 34 one by one and is used to cooperate with the storage plate 3 to seal the replacement slot 34. The replacement slot 34 protrudes from the storage plate 3 and is connected to the interior of the safety shield 32 through the side wall of the safety shield 32.

[0037] A support plate 4 is fixedly provided on the side of the storage plate 3 away from the cabinet door 5, and a support layer 41 is provided on the side of the support plate 4 facing the storage plate 3, and the support layer 41 is configured with a support groove corresponding to the storage hole 31. When storing items, the items are first placed in the test tube 6, and then the test tube 6 is inserted into the support groove through the storage hole 31. It should be noted that in the embodiment of the present application, when the test tube 6 is inserted into the support groove, the top height of the test tube 6 is higher than the height of the safety shield 32. The support layer 41 is preferably a sponge layer, and the support plate 4 is a heat-dissipating metal plate, such as an aluminum alloy plate. The design of the aluminum alloy plate and the sponge layer can maintain the temperature of the test tube 6 without making the temperature of the test tube 6 too high, thereby improving the safety effect of the safety cabinet.

[0038] Reference Figure 4 and Figure 5The cabinet door 5 includes an outer plate 52 and an inner plate 53, and the outer plate 52 and the inner plate 53 are provided with ventilation holes 55. A first filter cotton 54 is provided between the outer plate 52 and the inner plate. The sealing cover 51 is filled with a second filter cotton 512, and a connecting hole 511 is provided on the side wall of the sealing cover 51. When the cabinet door 5 is closed, the sealing cover 51 is butt-sealed with the safety shield 32, and the outside air enters the gap between the cabinet door 5 and the storage plate 3 through the ventilation holes 55 and the first filter cotton 54, and then enters the inside of the sealing cover 51 through the connecting hole 511. In the embodiment of the present application, the filling height of the second filter cotton 512 is higher than the height of the ventilation hole 55. When the outside air enters the sealing cover 51 through the connecting hole 511, it can be filtered twice by the second filter cotton 512. It should be noted that in the present application, the second filter cotton 512 is a glass fiber filter cotton. When the cabinet door 5 is closed, the second filter cotton 512 contacts the tube mouth of the test tube 6, and the volatile gas in the test tube 6 is mixed with the external gas in the glass fiber filter cotton and then discharged from the manifold 33. Since the glass fiber filter cotton has a large filtering gap and stable chemical properties, it can further improve the physical sealing of the items in the test tube 6 and realize the collection of volatile substances under the effect of mixing the volatile gas with the external gas.

[0039] Further, see Figure 1 and Figure 2 The two ends of the conduit 33 are connected to the air inlet duct 7 and the air outlet duct 8 . The air inlet duct 7 is located at the top of the cabinet cavity, and the air outlet duct 8 is located at the bottom of the storage plate 3 .

[0040] An air inlet cavity is provided at the top of the cabinet cavity, and an air inlet duct 7 is provided in the air inlet cavity. In one example, the air inlet duct 7 is an air inlet duct, which is connected to the outside of the cabinet 1 and connected to an air inlet pump fixed to the outside of the cabinet 1; in another example, the air inlet duct 7 is composed of an air inlet cavity, an air inlet pump is connected to the air inlet cavity, and the air inlet cavity is connected to multiple manifolds 33. The setting mode of the air inlet duct 7 is not limited in this application, as long as the air inlet duct 7 is provided at the top of the cabinet cavity and can supply air to multiple manifolds 33 at the same time. In a preferred embodiment, a wind valve is provided at the position where each manifold 33 is connected to the air inlet duct, and the air flow of the manifold 33 is adjusted by the wind valve.

[0041] The storage plate 3 and the back of the cabinet 1 are combined to form a storage cavity 11, and multiple layers of storage plates 12 are arranged vertically in the storage cavity 11, and the storage plates 12 are fixed in the storage cavity 11 by vertically fixed fixing columns. The side wall of the cabinet 1 is provided with a secondary door for storing and taking out items in the storage cavity 11. The air outlet duct 8 extends from the bottom of the storage plate 3 into the storage cavity 11, and an exhaust port is provided at the top of the storage cavity 11. During use, volatile items are stored in the storage plate 3 through the test tube 6, and non-volatile items or large items are placed in the storage cavity 11 through the storage plate 12, thereby further improving the diversity of items stored in the safety cabinet.

[0042] By adopting the above technical scheme, the cooperation between the safety shield 32 and the manifold 33 enables the discharge of the gas in the safety shield 32 during the ventilation process of the manifold 33; by setting the air inlet pipe 35 to be detachably connected to the storage plate 3, the air flow rate in each safety shield 32 can be adjusted by adjusting the diameter of the air vent 55 of the air inlet pipe 35, thereby achieving safe storage of a variety of volatile items; when the manifold 33 is ventilated, the gas in the safety shield 32 is sucked into the manifold 33 and discharged through the Venturi effect, and at the same time, the external gas enters the safety shield 32 through the first filter cotton 54 and the second filter cotton 512. While ensuring the filtration and sealing of the items in the test tube 6 and the external environment, the physical sealing of the items in the test tube 6 is improved and the collection of volatile substances is achieved through the structural cooperation of the second filter cotton 512 and the test tube 6.

[0043] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A biological safety cabinet, characterized in that: include: A cabinet body (1), wherein the cabinet body (1) is provided with a cabinet cavity and a cabinet door (5); A storage plate (3) is parallel to the cabinet door (5) and is fixedly arranged in the cabinet body (1), and the storage plate (3) is provided with a plurality of storage holes (31) for matching the test tubes (6); A safety shield (32), the safety shield (32) corresponds to the storage hole (31) one by one, and is arranged on a side of the storage plate (3) facing the cabinet door (5); the cabinet door (5) is provided with an air intake filter structure and a sealing cover (51) matched with the safety shield (32), and the air intake filter structure is in communication with the sealing cover (51); The support plate (4) is located on a side of the storage plate (3) away from the cabinet door (5), and the support plate (4) is fixedly provided with a support layer (41), and the support layer (41) is provided with a support groove corresponding to the storage hole (31); A conduit (33), wherein two ends of the conduit (33) are respectively connected to an air inlet duct (7) and an air outlet duct (8), the air inlet duct (7) is provided with an air intake pump, the conduit (33) is provided with a venturi tube (331) corresponding to the safety shield (32), and the air inlet of the venturi tube (331) is connected to the safety shield (32).

2. A biological safety cabinet according to claim 1, characterized in that: The air inlet of the venturi tube (331) is connected to the safety shield (32) through an air inlet pipe (35), and the air inlet pipe (35) is detachably connected to the storage plate (3).

3. A biological safety cabinet according to claim 2, characterized in that: The storage plate (3) is provided with a replacement groove (34), and the air intake pipe (35) is clamped with the storage plate (3) through the replacement groove (34).

4. A biological safety cabinet according to claim 3, characterized in that: The storage plate (3) is provided with a protective cover, which corresponds one-to-one to the replacement groove (34) and is used to cooperate with the storage plate (3) to seal the replacement groove (34).

5. A biological safety cabinet according to claim 1, characterized in that: The side wall of the sealing cover (51) is provided with a connecting hole (511), the air intake filter structure is connected to the sealing cover (51) through the connecting hole (511), and the sealing cover (51) is filled with a second filter cotton (512).

6. A biological safety cabinet according to claim 5, characterized in that: The cabinet door (5) comprises an outer plate (52) and an inner plate (53), the outer plate (52) and the inner plate (53) are provided with ventilation holes (55), and the air intake filter structure comprises a first filter cotton (54) arranged between the outer plate (52) and the inner plate (53).

7. A biological safety cabinet according to claim 5, characterized in that: The second filter cotton (512) is glass fiber filter cotton, and the filling height of the glass fiber filter cotton is higher than the height of the connecting hole (511).

8. A biological safety cabinet according to claim 1, characterized in that: A storage cavity (11) is also provided in the cabinet cavity. The storage cavity (11) is located on a side of the storage plate (3) away from the cabinet door (5). A storage plate (12) is fixedly provided in the storage cavity (11).

9. A biological safety cabinet according to claim 8, characterized in that: The storage board (12) is configured with multiple layers, and the multiple layers of storage board (12) are fixed in the storage cavity (11) via vertical fixing columns.

10. A biological safety cabinet according to claim 8, characterized in that: An air inlet cavity is arranged at the top of the cabinet cavity, the air inlet duct (7) is arranged in the air inlet cavity, the air inlet pump is arranged outside the cabinet body (1), the air outlet duct (8) extends from the bottom of the storage plate (3) into the storage cavity (11), and an air outlet is arranged at the top of the storage cavity (11).

Images