Downward airflow velocity measuring device for wind speed measuring device of biological safety cabinet

Abstract

A downdraft flow velocity measuring device for a biosafety cabinet wind speed measuring device is characterized by comprising a base, a connecting block is arranged on the base, an adjusting piece is arranged on the connecting block, an adjusting rod is arranged on the adjusting piece, a suction cup is arranged at the lower end of the adjusting rod, a supporting frame is arranged on the base, an adjusting hole is formed in the base, and the adjusting hole is communicated with the supporting frame. A mounting rod is arranged in the adjusting hole, a fixing buckle is arranged on the mounting rod, a placing table is arranged on the mounting rod, a pipe clamp is arranged on the placing table, and a wind speed sensor is arranged in the pipe clamp; the adjusting rod on the adjusting sheet is rotated according to the use position, so that the position of the base is kept horizontal, three-degree-of-freedom downflow velocity measurement is realized, downflow velocity measurement of the wind speed measuring device is not fixed in the biosafety cabinet during detection, the wind speed measuring device is convenient to move and suitable for various biosafety cabinets, the applicability is improved, and meanwhile, the shoelace is convenient to use and convenient to use. Disassembly and assembly are easy, and efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of airflow measurement devices for biosafety cabinets, and in particular to a descending airflow velocity measurement device for use in biosafety cabinet airflow measurement devices. Background Technology

[0002] A biological safety cabinet (BSC) is a box-type air-purifying negative pressure safety device that prevents the aerosol release of hazardous or unknown biological particles during experimental operations. As a high-risk device, quality testing of biological safety cabinets is essential to ensure the safety of personnel and the laboratory environment. Biological safety cabinets are classified into three levels: Class I, Class II, and Class III. Class II biological safety cabinets rely on a partial barrier system formed by airflow to provide protection for personnel, the environment, and products. The combination of inward and downward airflow formed by the front grille provides protection for personnel and products. The descending airflow, filtered by HEPA (High-Efficiency Particulate Air) / ULPA (Ultra-High-Efficiency Particulate Air) filters, flows towards the workbench surface and is then drawn into the front and rear air intake grilles, minimizing lateral cross-contamination of products. The exhaust airflow is filtered by HEPA / ULPA before being discharged from the cabinet, protecting the environment.

[0003] Existing biosafety cabinet airflow measurement devices contain downflow velocity measurement modules and inflow velocity measurement modules, but they are all fixed inside the biosafety cabinet, making them inconvenient to move and only usable in one biosafety cabinet. They cannot be used to test other biosafety cabinets. To solve the above problems, a downflow velocity measurement device for biosafety cabinet airflow measurement is proposed. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a downdraft velocity measuring device for a biosafety cabinet, characterized by comprising a base, a connecting block, an adjusting plate, an adjusting rod, a suction cup, a support frame, an adjusting hole, a mounting rod, a fixing buckle, a placement platform, a pipe clamp, and a wind speed sensor. The base is provided with a connecting block, the connecting block with an adjusting plate, the adjusting plate with an adjusting rod, the lower end of the adjusting rod with a suction cup, the base with a support frame, the base with an adjusting hole, the adjusting hole with a mounting rod, the mounting rod with a fixing buckle, the mounting rod with a placement platform, the placement platform with a pipe clamp, and the pipe clamp with a wind speed sensor.

[0005] Furthermore, there are two connecting blocks, which are fixedly installed at both ends of the base. Each connecting block is fixedly equipped with an adjusting plate. One end of the adjusting plate extends out of the connecting block. An adjusting rod is threaded on the adjusting plate. The adjusting rod has threads on its surface. The lower end of the adjusting rod is connected to the suction cup through a bearing.

[0006] Furthermore, the support frame is located in the middle of the base, and the upper surface of the base has several adjustment holes. There are mounting rods in the adjustment holes, and the bottom of the mounting rods is directly inserted into the adjustment holes. There are three mounting rods, and the upper end of the mounting rods has a groove. A fixing buckle is provided on the outer wall of the groove. The bottom of the placement platform has a rod-shaped plug, which is inserted into the groove of the mounting rod and fixed by the fixing buckle.

[0007] Furthermore, the placement platform is inverted L-shaped, and a pipe clamp is provided on the upper surface of the placement platform. The wind speed sensor is mounted on the placement platform through the pipe clamp, and the wind speed sensor is connected to an external controller.

[0008] The beneficial effects of this utility model are:

[0009] This invention involves inserting three mounting rods into adjustment holes at appropriate positions on a base, connecting three wind speed sensors to an external controller via electrical wires, and mounting them onto three placement platforms using pipe clamps. The placement platforms are then secured to the mounting rods with fixing buckles. The positions of the mounting rods are adjusted so that the three wind speed sensors face three different directions. Suction cups at both ends of the base are then attached to suitable positions inside the biosafety cabinet. Adjusting the adjustment rods on the adjustment plate according to the usage position ensures the base remains horizontal, enabling three-degree-of-freedom measurement of the downward airflow velocity. During testing, the downward airflow velocity measurement device is not fixed inside the biosafety cabinet, allowing for easy movement and applicability to various biosafety cabinets, thus improving its versatility. Furthermore, the convenient mounting and disassembly mechanism enhances efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the downflow velocity measuring device for a biosafety cabinet according to the present invention.

[0011] Figure 2 This is a partial structural schematic diagram of the downflow velocity measuring device for a biosafety cabinet according to the present invention;

[0012] As shown in the figure: 1. Base, 2. Connecting block, 3. Adjusting plate, 4. Adjusting rod, 5. Suction cup, 6. Support frame, 7. Adjusting hole, 8. Mounting rod, 9. Fixing buckle, 10. Placement platform, 11. Pipe clamp, 12. Wind speed sensor. Detailed Implementation

[0013] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] Example 1

[0017] This utility model provides a downflow velocity measuring device for a biosafety cabinet wind speed measuring device, characterized in that it includes a base 1, a connecting block 2, an adjusting plate 3, an adjusting rod 4, a suction cup 5, a support frame 6, an adjusting hole 7, a mounting rod 8, a fixing buckle 9, a placement platform 10, a pipe clamp 11, and a wind speed sensor 12. The base 1 is provided with a connecting block 2, the connecting block 2 is provided with an adjusting plate 3, the adjusting plate 3 is provided with an adjusting rod 4, the lower end of the adjusting rod 4 is provided with a suction cup 5, the base 1 is provided with a support frame 6, the base 1 is provided with an adjusting hole 7, the adjusting hole 7 is provided with a mounting rod 8, the mounting rod 8 is provided with a fixing buckle 9, the mounting rod 8 is provided with a placement platform 10, the placement platform 10 is provided with a pipe clamp 11, and the pipe clamp 11 is provided with a wind speed sensor 12.

[0018] Furthermore, there are two connecting blocks 2, which are fixedly installed at both ends of the base 1 respectively. Each connecting block 2 is fixedly equipped with an adjusting plate 3. One end of the adjusting plate 3 extends out of the connecting block 2. An adjusting rod 4 is threaded on the adjusting plate 3. The lower end of the adjusting rod 4 is connected to the suction cup 5 through a bearing.

[0019] Furthermore, the support frame 6 is located in the middle of the base 1. The upper surface of the base 1 has several adjustment holes 7. There are mounting rods 8 inside the adjustment holes 7. The bottom of the mounting rods 8 is directly inserted into the adjustment holes 7. There are three mounting rods 8. The upper end of the mounting rods 8 has a groove. The outer wall of the groove is provided with a fixing buckle 9. The bottom of the placement platform 10 has a rod-shaped plug, which is inserted into the groove of the mounting rod 8 and fixed by the fixing buckle 9.

[0020] Furthermore, the placement platform 10 is inverted L-shaped, and a pipe clamp 11 is provided on the upper surface of the placement platform 10. The wind speed sensor 12 is installed on the placement platform 10 through the pipe clamp 11, and the wind speed sensor 12 is connected to an external controller.

[0021] Example 2

[0022] In use, insert the three mounting rods 8 into the adjustment holes 7 at appropriate positions on the base 1 as needed, connect the three wind speed sensors 12 to the external controller via electrical wires, and install them on the three placement platforms 10 respectively via pipe clamps 11. Fix the placement platforms 10 to the mounting rods 8 with fixing buckles 9, and adjust the position of the mounting rods 8 so that the three wind speed sensors 12 face three different directions. Attach the suction cups 5 at both ends of the base 1 to the appropriate positions inside the biosafety cabinet. Rotate the adjustment rods 4 on the adjustment plate 3 according to the position of use to keep the base 1 horizontal, thereby achieving the measurement of the downward airflow velocity in three degrees of freedom.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A downflow velocity measuring device for a biosafety cabinet air velocity measuring device, characterized by, The device includes a base, a connecting block, an adjusting plate, an adjusting rod, a suction cup, a support frame, an adjusting hole, a mounting rod, a fixing buckle, a placement platform, a pipe clamp, and a wind speed sensor. The connecting block is mounted on the base, the adjusting plate is mounted on the connecting block, the adjusting rod is mounted on the adjusting plate, and a suction cup is mounted at the lower end of the adjusting rod. The support frame is mounted on the base, the adjusting hole is mounted on the base, the mounting rod is mounted inside the adjusting hole, the fixing buckle is mounted on the mounting rod, the placement platform is mounted on the placement platform, and the wind speed sensor is mounted inside the pipe clamp.

2. The downflow velocity measuring device for a biosafety cabinet air velocity measuring device according to claim 1, wherein, There are two connecting blocks, which are fixedly installed at both ends of the base. Each connecting block is fixedly equipped with an adjusting plate. One end of the adjusting plate extends out of the connecting block. An adjusting rod is threaded on the adjusting plate. The adjusting rod has threads on its surface. The lower end of the adjusting rod is connected to the suction cup through a bearing.

3. The downflow velocity measuring device for a biosafety cabinet air velocity measuring device according to claim 1, wherein, The support frame is located in the middle of the base. The upper surface of the base has several adjustment holes. There are mounting rods in the adjustment holes. The bottom of the mounting rods is directly inserted into the adjustment holes. There are three mounting rods. The upper end of the mounting rods has a groove. The outer wall of the groove is provided with a fixing buckle. The bottom of the placement platform has a rod-shaped plug, which is inserted into the groove of the mounting rod and fixed by the fixing buckle.

4. The downflow velocity measuring device for a biosafety cabinet air velocity measuring device according to claim 1, wherein, The placement platform is inverted L-shaped, and a pipe clamp is provided on the upper surface of the placement platform. The wind speed sensor is mounted on the placement platform through the pipe clamp and is connected to an external controller.

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