Biological safety cabinet

Abstract

The utility model discloses a biological safety cabinet which comprises a cabinet body, the cabinet body is installed on external equipment, a connecting mechanism is arranged on the cabinet body, the connecting mechanism comprises a vacuum pipe, an air suction pipe, a taper sleeve, a threaded sleeve, a spring, a one-way disc, a middle disc, an adjusting mechanism and a sliding mechanism, the vacuum pipe is installed on the cabinet body, and the air suction pipe is installed on the cabinet body. One end of the air suction pipe is connected to the vacuum pipe, the other end of the air suction pipe is connected to external equipment, the biosafety cabinet can be effectively connected with the external equipment through the design of the connecting mechanism, establishment and maintenance of a vacuum environment are ensured, and the vacuumizing process can be rapidly started through cooperation of the vacuum pipe and the air suction pipe. The combination of the spring and the one-way disc can achieve automatic adjustment under the action of negative pressure, it is ensured that sealing can be unsealed when certain pressure is reached, therefore, damage to equipment caused by too large pressure is avoided, and due to the design, the operation process is simplified, and the safety and efficiency of an experiment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biological safety cabinets, and more specifically, to a biological safety cabinet. Background Art

[0002] In today's biosafety field, biological safety cabinets play a vital role. They provide researchers with a necessary safety protection environment to conduct experiments with potentially hazardous substances. However, existing biological safety cabinets face a technical challenge during use: in order to ensure the vacuum environment of the experiment, these devices need to have extremely high sealing performance. Unfortunately, most of the biological safety cabinets on the market currently have certain deficiencies in this regard. This lack of sealing performance directly affects the operating effect of the equipment, which may not only affect the experimental results, but more importantly, it may increase the risk of operators being exposed to hazardous substances.

[0003] Specifically, when a biosafety cabinet is operated under vacuum conditions, any tiny leak may cause outside air to flow in, thereby destroying the vacuum environment required for the experiment. This not only interferes with the accuracy of the experiment, but also may cause safety hazards if harmful or volatile biological materials are involved. Existing equipment still has defects in sealing technology, which may be due to design deficiencies or limitations in manufacturing materials and processes. Therefore, in order to improve the use effect of biosafety cabinets, ensure the accuracy of experiments and the safety of operators, it is urgent to develop and improve existing sealing technologies to enhance the overall performance and reliability of the equipment. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the problems existing in the prior art, the utility model provides a biological safety cabinet to solve the technical problems mentioned in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biological safety cabinet, comprising a cabinet body, which is installed on external equipment. A connecting mechanism is arranged on the cabinet body, and the connecting mechanism comprises a vacuum tube, an air suction pipe, a tapered sleeve, a threaded sleeve, a spring, a one-way disk, an intermediate disk, an adjusting mechanism and a sliding mechanism. The vacuum tube is installed on the cabinet body, one end of the air suction pipe is connected to the vacuum tube, and the other end of the air suction pipe is connected to the external equipment. The tapered sleeve is installed in the vacuum tube, the threaded sleeve is threadedly connected in the vacuum tube, the intermediate disk is coaxially installed in the vacuum tube, the one-way disk is pressed on the intermediate disk, one end of the spring is connected to the threaded sleeve, and the other end of the spring is pressed on the one-way disk. The adjusting mechanism and the sliding mechanism are respectively installed on the vacuum tube, and a hexagonal groove is provided on the threaded sleeve.

[0008] The utility model is further configured that the sliding mechanism includes a guide plate and a guide strip, the guide strip is installed on the inner wall of the vacuum tube, the guide plate is slidably connected in the vacuum tube, and the design of the sliding mechanism ensures the continuity of adjustment.

[0009] The utility model is further configured that a plurality of guide bars are provided, and the plurality of guide bars are equidistantly arranged, a guide groove is provided on the guide plate, the guide bar is slidably connected in the guide groove, and the design of the guide groove ensures the limiting of the guide plate.

[0010] The utility model is further configured that the adjusting mechanism comprises an adjusting tube, the adjusting tube is mounted on the one-way disk, and the adjusting tube is slidably connected in the threaded sleeve, and the design of the adjusting mechanism ensures the continuity of the adjustment.

[0011] The utility model is further configured that a telescopic sleeve is threadedly provided on the outer wall of the adjusting tube, a thrust bearing is provided on the telescopic sleeve, and the design of the telescopic sleeve ensures the elastic force adjustment of the compression spring.

[0012] The utility model is further configured that a sealing disk is provided on the thrust bearing, the sealing disk is fitted on the guide disk, a compression spring is installed on the guide disk, the compression spring abuts against the lower end surface of the intermediate disk, and the design of the sealing disk ensures double sealing.

[0013] The utility model is further configured that an intermediate rod is rotatably arranged inside the regulating tube, a rotating head is arranged on the intermediate rod, and the rotating head is fitted on the regulating tube. The design of the intermediate rod ensures the transmission of power.

[0014] The utility model is further configured that an insertion rod is provided on the rotating head, and the insertion rod is slidably connected in the telescopic sleeve. The design of the insertion rod ensures the rotation of the telescopic sleeve.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a biological safety cabinet with the following beneficial effects:

[0017] 1. The design of the connection mechanism enables the biological safety cabinet to be effectively connected to external equipment, ensuring the establishment and maintenance of the vacuum environment. The vacuum process can be quickly started through the cooperation of the vacuum tube and the suction tube. The combination of the spring and the one-way disk can achieve automatic adjustment under the action of negative pressure, ensuring that the seal can be unsealed when a certain pressure is reached, thereby avoiding damage to the equipment due to excessive pressure. This design not only simplifies the operating process, but also improves the safety and efficiency of the experiment.

[0018] 2. The adjustment mechanism realizes fine adjustment of the sealing pressure through the cooperation of the adjustment tube and the telescopic sleeve. The design of the rotating head and the insertion rod enables the operator to easily adjust the position of the sealing disk, thereby changing the pressure of the compression spring to adapt to different vacuum requirements. This flexibility enables the biological safety cabinet to adapt to a variety of experimental conditions while ensuring the reliability of the seal.

[0019] 3. The sliding mechanism consists of a guide plate and a guide strip, which work together to ensure that the guide plate can slide up and down smoothly during the vacuuming process, thereby achieving a double sealing effect. This design not only improves the reliability of the seal, but also reduces the risk of leakage caused by poor sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a biological safety cabinet in the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the vacuum tube in the utility model;

[0022] Figure 3 For the utility model Figure 2 A schematic cross-sectional structure diagram of ;

[0023] Figure 4 It is a cross-sectional structural schematic diagram of the telescopic mechanism in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the telescopic sleeve in the utility model.

[0025] In the figure: 1. cabinet; 2. vacuum tube; 3. suction pipe; 4. tapered sleeve; 5. threaded sleeve; 6. spring; 7. one-way disk; 8. intermediate disk; 9. hexagonal groove; 10. guide disk; 11. guide strip; 12. guide groove; 13. adjusting tube; 14. telescopic sleeve; 15. thrust bearing; 16. sealing disk; 17. intermediate rod; 18. rotating head; 19. insertion rod; 101. compression spring. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0029] See also Figure 1-5 A biological safety cabinet comprises a cabinet body 1, which is mounted on an external device. A connecting mechanism is arranged on the cabinet body 1, and the connecting mechanism comprises a vacuum tube 2, an air suction tube 3, a cone sleeve 4, a threaded sleeve 5, a spring 6, a one-way disk 7, an intermediate disk 8, an adjustment mechanism and a sliding mechanism. The vacuum tube 2 is mounted on the cabinet body 1, one end of the air suction tube 3 is connected to the vacuum tube 2, and the other end of the air suction tube 3 is connected to the external device. The cone sleeve 4 is mounted in the vacuum tube 2, the threaded sleeve 5 is threadedly connected in the vacuum tube 2, the intermediate disk 8 is coaxially mounted in the vacuum tube 2, the one-way disk 7 is pressed on the intermediate disk 8, one end of the spring 6 is connected to the threaded sleeve 5, and the other end of the spring 6 is pressed on the one-way disk 7, the adjustment mechanism and the sliding mechanism are respectively mounted on the vacuum tube 2, the threaded sleeve 5 is provided with a hexagonal groove 9, the sliding mechanism comprises a guide disk 10 and a guide strip 11, the guide strip 11 is mounted on the inner wall of the vacuum tube 2, The disk 10 is slidably connected in the vacuum tube 2, a plurality of guide strips 11 are provided, and the plurality of guide strips 11 are equidistantly arranged, a guide groove 12 is provided on the guide disk 10, and the guide strip 11 is slidably connected in the guide groove 12, the adjustment mechanism includes an adjustment tube 13, the adjustment tube 13 is installed on the one-way disk 7, and the adjustment tube 13 is slidably connected in the threaded sleeve 5, a telescopic sleeve 14 is threadedly provided on the outer wall of the adjustment tube 13, a thrust bearing 15 is provided on the telescopic sleeve 14, a sealing disk 16 is provided on the thrust bearing 15, and the sealing disk 16 is attached to the guide disk 10, a compression spring 101 is installed on the guide disk 10, and the compression spring 101 abuts against the lower end surface of the intermediate disk 8, an intermediate rod 17 is rotatably provided in the adjustment tube 13, a rotating head 18 is provided on the intermediate rod 17, the rotating head 18 is attached to the adjustment tube 13, an insertion rod 19 is provided on the rotating head 18, and the insertion rod 19 is slidably connected in the telescopic sleeve 14.

[0030] In this embodiment, when it is necessary to evacuate the cabinet 1, air is first sucked in through the suction pipe 3 by external equipment, and then when the negative pressure exceeds the elastic force of the spring 6, the seal between the one-way disk 7 and the middle disk 8 will be released, and then the one-way disk 7 will slide upward. At this time, the sealing disk 16 and the telescopic sleeve 14 will fit each other, and then when the negative pressure is still greater than the elastic force of the compression spring 101, the seal between the guide disk 10 and the sealing disk 16 will be released, and then the guide disk 10 will slide upward, and then the seal between the guide disk 10 and the sealing disk 16 will be released, and then the negative pressure process can be carried out. Due to the double seal between the guide disk 10 and the one-way disk 7, the sealing effect is guaranteed.

[0031] More specifically, when it is necessary to adjust the pressure of the spring 6, first, the threaded sleeve 5 can be driven to rotate by rotating the hexagonal slot 9, so as to adjust the pressure between the one-way disk 7 and the intermediate disk 8. When it is necessary to adjust the pressure between the guide disk 10 and the sealing disk 16, first fix the adjusting tube 13, and then rotate the intermediate rod 17. Since the insertion rod 19 is rotatably connected to the telescopic sleeve 14, the telescopic sleeve 14 can be threadedly connected to the adjusting tube 13. Therefore, the upper and lower positions of the telescopic sleeve 14 can be adjusted, and then the pressure of the compression spring 101 is changed, thereby completing the adjustment process.

[0032] In summary, when the overall equipment is in use or running: when it is necessary to evacuate the cabinet 1, air is first sucked in through the suction pipe 3 through external equipment, and then when the negative pressure exceeds the elastic force of the spring 6, the seal between the one-way disk 7 and the middle disk 8 will be released, and then the one-way disk 7 will slide upward. At this time, the sealing disk 16 and the telescopic sleeve 14 will fit each other, and then when the negative pressure is still greater than the elastic force of the compression spring 101, the seal between the guide disk 10 and the sealing disk 16 will be released, and then the guide disk 10 will slide upward, and then the seal between the guide disk 10 and the sealing disk 16 will be released, and then the negative pressure process can be carried out. The double seal between the disk 10 and the one-way disk 7 ensures the sealing effect. When the pressure of the spring 6 needs to be adjusted, the threaded sleeve 5 can be driven to rotate by rotating the hexagonal groove 9, so as to adjust the pressure between the one-way disk 7 and the middle disk 8. When the pressure between the guide disk 10 and the sealing disk 16 needs to be adjusted, the adjusting tube 13 is first fixed, and then the middle rod 17 is rotated. Since the insertion rod 19 is rotatably connected to the telescopic sleeve 14, the telescopic sleeve 14 can be threadedly connected to the adjusting tube 13. Therefore, the upper and lower positions of the telescopic sleeve 14 can be adjusted, and then the pressure of the compression spring 101 is changed, thereby completing the adjustment process.

[0033] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A biological safety cabinet, comprising a cabinet body (1), characterized in that: The cabinet (1) is mounted on an external device. A connecting mechanism is provided on the cabinet (1). The connecting mechanism comprises a vacuum tube (2), an air suction tube (3), a cone sleeve (4), a threaded sleeve (5), a spring (6), a one-way disk (7), an intermediate disk (8), an adjusting mechanism and a sliding mechanism. The vacuum tube (2) is mounted on the cabinet (1). One end of the air suction tube (3) is connected to the vacuum tube (2). The other end of the air suction tube (3) is connected to the external device. The cone sleeve (4) is mounted in the vacuum tube (2). The threaded sleeve (5) is threadedly connected in the vacuum tube (2). The intermediate disk (8) is coaxially mounted in the vacuum tube (2). The one-way disk (7) is pressed on the intermediate disk (8). One end of the spring (6) is connected to the threaded sleeve (5). The other end of the spring (6) is pressed on the one-way disk (7). The adjusting mechanism and the sliding mechanism are respectively mounted on the vacuum tube (2). A hexagonal groove (9) is provided on the threaded sleeve (5).

2. A biological safety cabinet according to claim 1, characterized in that: The sliding mechanism comprises a guide plate (10) and a guide bar (11), wherein the guide bar (11) is mounted on the inner wall of the vacuum tube (2), and the guide plate (10) is slidably connected inside the vacuum tube (2).

3. A biological safety cabinet according to claim 2, characterized in that: A plurality of guide bars (11) are provided, and the plurality of guide bars (11) are arranged at equal distances from each other. A guide groove (12) is provided on the guide plate (10), and the guide bar (11) is slidably connected in the guide groove (12).

4. A biological safety cabinet according to claim 3, characterized in that: The adjusting mechanism comprises an adjusting tube (13), the adjusting tube (13) is mounted on the one-way disk (7), and the adjusting tube (13) is slidably connected in the threaded sleeve (5).

5. A biological safety cabinet according to claim 4, characterized in that: A telescopic sleeve (14) is threadedly provided on the outer wall of the regulating tube (13), and a thrust bearing (15) is provided on the telescopic sleeve (14).

6. A biological safety cabinet according to claim 5, characterized in that: The thrust bearing (15) is provided with a sealing disk (16), which is attached to the guide disk (10). A compression spring (101) is installed on the guide disk (10), and the compression spring (101) abuts against the lower end surface of the intermediate disk (8).

7. A biological safety cabinet according to claim 6, characterized in that: An intermediate rod (17) is rotatably arranged inside the regulating tube (13), a rotating head (18) is arranged on the intermediate rod (17), and the rotating head (18) is attached to the regulating tube (13).

8. A biological safety cabinet according to claim 7, characterized in that: The rotating head (18) is provided with an insertion rod (19), and the insertion rod (19) is slidably connected in the telescopic sleeve (14).

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