Airflow velocity measuring tool of biological safety cabinet

Abstract

The invention relates to the technical field of biosafety cabinets, in particular to an airflow velocity measuring tool of a biosafety cabinet, which comprises a bottom plate positioned in a cabinet body, a measuring hole formed in the bottom plate, a movable table arranged on the bottom plate and a vertical rod arranged on the movable table, and further comprises a fixing device sleeved on the vertical rod; the angle adjusting assembly is arranged on the fixing device; the positioning assembly is arranged on the movable table through a connecting plate; by arranging the clamping assembly, the angle adjusting assembly and the positioning assembly, the anemograph probe is firstly fixed through the clamping assembly, then the probe is finely adjusted through the angle adjusting assembly, so that the opening of the probe is in a vertically downward state, and then the probe is aligned with the measuring hole through the guide rod, so that the measurement accuracy of the anemograph probe is improved. And then, when the measuring hole is replaced, the positioning rod can be inserted into the next measuring hole, so that the stability and the precision of measurement are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of biosafety cabinets, and in particular to an airflow velocity measuring tool for a biosafety cabinet. Background Art

[0002] Biosafety cabinets are also called negative pressure filtration exhaust cabinets, which are mainly used to prevent operators and the environment from being exposed to bioaerosols generated during the experiment. This equipment needs to detect its airflow velocity during use. At present, when the airflow into the biosafety cabinet is detected, the test personnel use a steel tape measure to locate the horizontal coordinate at the front window operation port of the biosafety cabinet, and use the scale of the handheld anemometer probe to locate the vertical coordinate. The approximate position of each detection point is located in the air, and then the handheld anemometer is used for detection. After each point is detected, the next point needs to be manually repeated to repeat the previous positioning action and then detect again.

[0003] The inspection is time-consuming because the inspectors need to hold the anemometer at the front window operating port for a long time. The inspectors have to use a steel tape measure to locate the horizontal coordinate each time, and the scale on the handheld anemometer probe locates the vertical coordinate, which takes a very long time, has a very low positioning accuracy, and is completely non-reproducible. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned deficiencies and provide an air flow velocity measurement tool for a biological safety cabinet.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A biosafety cabinet airflow velocity measuring tool comprises a bottom plate located in the cabinet, a measuring hole is opened on the bottom plate, a movable platform is arranged on the bottom plate, a vertical pole is arranged on the movable platform, and further comprises:

[0007] A fixing device, which is mounted on the vertical pole and is used to fix the anemometer probe;

[0008] An angle adjustment component, arranged on the fixing device, for driving the rotation of the anemometer probe;

[0009] The positioning component is arranged on the movable table through a connecting plate and is used to align the anemometer probe with the measuring hole.

[0010] Furthermore, the fixing device includes a movable sleeve mounted on the vertical pole, a fixing ring is provided on one side of the movable sleeve, an angle adjustment assembly is provided on the fixing ring, a turntable is provided at one end of the fixing ring, a driven gear is provided at the other end of the fixing ring, vertical grooves are provided on the turntable and the driven gear, a clamping assembly for clamping the anemometer probe is provided in the vertical groove, and a locking rod for tightening against the vertical pole is also provided on the movable sleeve.

[0011] Furthermore, the clamping assembly includes two movable blocks sliding in the vertical groove, a clamping plate is provided on the movable block, two vertical plates are provided on one side of the vertical groove, a bidirectional threaded rod is rotatably provided between the two vertical plates, a limiting slider sleeved on the bidirectional threaded rod is provided on one side of the movable block, and a roller is provided at one end, the two rollers are connected by a conveyor belt transmission, and a knob is provided on the roller.

[0012] Furthermore, the angle adjustment assembly includes a fixing plate fixed on the fixing ring, a driving gear is rotatably arranged on the fixing plate, and the driving gear is meshed with the driven gear.

[0013] Furthermore, the positioning assembly includes a fixed sleeve fixed on the connecting plate, a telescopic rod is slidably arranged in the fixed sleeve, a positioning rod is arranged at the bottom end of the telescopic rod, a guide rod is arranged at the top end of the telescopic rod, a baffle is arranged on the telescopic rod, a return spring is arranged between the baffle and the inner top end of the fixed sleeve and is sleeved on the telescopic rod, and a lifting assembly for driving the telescopic rod to move upward is arranged on the connecting plate.

[0014] Furthermore, the lifting assembly includes a mounting plate fixed on the connecting plate, a cam is rotatably arranged on the mounting plate, a driving motor is arranged on one side of the cam, a sliding groove is opened on the side wall of the fixed sleeve, a convex plate fixed on the baffle is slidably arranged in the sliding groove, and the cam is located at the bottom of the convex plate.

[0015] Furthermore, a lead screw is rotatably arranged in the bottom plate, a movable slider is arranged at the bottom of the movable platform, and the movable slider is sleeved on the lead screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a clamping assembly, an angle adjustment assembly and a positioning assembly. The anemometer probe is first fixed by the clamping assembly, and then the probe is fine-tuned by the angle adjustment assembly so that the opening of the probe is in a vertical downward state. Then, the probe can be aligned with the measuring hole by the guide rod. After that, when the measuring hole is replaced, the positioning rod can be inserted into the next measuring hole to ensure the stability and accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the connection between the fixing device of the present invention and the vertical pole;

[0021] Figure 3 It is a schematic diagram of the structure of the fixing device of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the clamping assembly of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the positioning assembly of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the lifting assembly of the present invention.

[0025] In the figure: 1, cabinet; 2, bottom plate; 21, measuring hole; 22, lead screw; 3, movable table; 30, moving slider; 4, vertical rod; 5, fixing device; 51, movable sleeve; 52, fixing ring; 53, turntable; 54, driven gear; 55, clamping assembly; 551, movable block; 552, clamping plate; 553, limit slider; 554, vertical plate; 555, two-way threaded rod; 556, roller shaft; 557, transmission Belt; 558, knob; 56, locking rod; 6, angle adjustment assembly; 61, fixing plate; 62, driving gear; 7, anemometer probe; 8, positioning assembly; 80, connecting plate; 81, fixing sleeve; 82, telescopic rod; 83, positioning rod; 84, guide rod; 85, baffle; 851, convex plate; 86, reset spring; 87, lifting assembly; 871, mounting plate; 872, cam; 873, drive motor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] Reference Figure 1-Figure 6 As shown, an air flow velocity measurement tool is mainly used on a biological safety cabinet, including a bottom plate 2 located in a cabinet body 1, a measuring hole 21 is opened on the bottom plate 2, a movable platform 3 is arranged on the bottom plate 2, and a vertical pole 4 is arranged on the movable platform 3, and also includes:

[0029] A fixing device 5 is sleeved on the vertical pole 4 and is used to fix the anemometer probe 7;

[0030] An angle adjustment assembly 6 is provided on the fixing device 5 and is used to drive the anemometer probe 7 to rotate, mainly to keep the front end opening of the anemometer probe 7 in a vertical state;

[0031] The positioning component 8 is set on the movable platform 3 through the connecting plate 80. Initially, it is used to align the anemometer probe 7 with the measuring hole 21, and the movable end of the positioning component 8 is inserted into the measuring hole 21. Later, when the measuring hole 21 is replaced, the positioning component 8 can be inserted into the next measuring hole 21.

[0032] In one embodiment, the fixing device 5 includes a movable sleeve 51 sleeved on the vertical pole 4, a fixing ring 52 is provided on one side of the movable sleeve 51, the angle adjustment assembly 6 is provided on the fixing ring 52, a rotating disk 53 is provided on one end of the fixing ring 52, a driven gear 54 is provided on the other end of the fixing ring 52, vertical grooves are provided on the rotating disk 53 and the driven gear 54, a clamping assembly 55 for clamping the anemometer probe 7 is provided in the vertical groove, and a locking rod 56 for pressing against the vertical pole 4 is also provided on the movable sleeve 51;

[0033] First, insert the anemometer probe 7 into the turntable 53 and the driven gear 54, and fix it by the clamping assembly 55. Then, the anemometer probe 7 can be rotated by the angle adjustment assembly 6 so that the front end opening of the anemometer probe 7 is vertically downward, and the positioning assembly 8 is used to align the opening with the measuring hole 21.

[0034] In one embodiment, the clamping assembly 55 includes two movable blocks 551 sliding in the vertical slots, a clamping plate 552 is provided on the movable blocks 551, two vertical plates 554 are provided on one side of the vertical slots, a bidirectional threaded rod 555 is rotatably provided between the two vertical plates 554, and a limiting slider 553 sleeved on the bidirectional threaded rod 555 is provided on one side of the movable block 551;

[0035] After the anemometer probe 7 is inserted into the rotating disk 53 and the driven gear 54 , the two-way threaded rod 555 can be rotated to move the clamping plates 552 on both sides inward at the same time, thereby fixing the anemometer probe 7 .

[0036] In one embodiment, a roller 556 is disposed at one end of the bidirectional threaded rod 555 , and the two rollers 556 are connected to each other through a transmission belt 557 , and a knob 558 is disposed on the roller 556 ;

[0037] The two bidirectional threaded rods 555 can be rotated synchronously via a conveyor belt 557 , so that the two clamping assemblies 55 can fix and clamp the anemometer probe 7 at the same time.

[0038] In one embodiment, the angle adjustment assembly 6 includes a fixing plate 61 fixed on the fixing ring 52, a driving gear 62 is rotatably provided on the fixing plate 61, and the driving gear 62 is meshed with the driven gear 54;

[0039] After the anemometer probe 7 is fixed and clamped, the driving gear 62 can be rotated, and the driving gear 62 can drive the driven gear 54 to rotate, so as to fine-tune the anemometer probe 7.

[0040] In one embodiment, the positioning assembly 8 includes a fixed sleeve 81 fixed on the connecting plate 80, a telescopic rod 82 is slidably arranged in the fixed sleeve 81, a positioning rod 83 is arranged at the bottom end of the telescopic rod 82, a guide rod 84 is arranged at the top end of the telescopic rod 82, a baffle 85 is arranged on the telescopic rod 82, and a return spring 86 is arranged between the baffle 85 and the inner top end of the fixed sleeve 81 and sleeved on the telescopic rod 82;

[0041] Initially, the positioning rod 83 is inserted into the first measuring hole 21. At this time, the guide rod 84 on the top is aligned with the measuring hole 21. Since the anemometer probe 7 has a certain elasticity, the anemometer probe 7 is moved down and the probe is pulled so that the opening of the probe is sleeved on the guide rod 84. This completes the alignment of the anemometer probe 7 with the measuring hole 21. Then, the movable sleeve 51 is moved up to a suitable height and fixed by the locking rod 56.

[0042] The connecting plate 80 is also provided with a lifting assembly 87 for driving the telescopic rod 82 to move upward. After measuring a measuring hole 21, the telescopic rod 82 can be driven to move upward by the lifting assembly 87, so that the positioning rod 83 is separated from the measuring hole 21, and then the movable platform 3 is moved to the next measuring hole 21. After the positioning rod 83 is inserted into the next measuring hole 21, the detection begins.

[0043] In one embodiment, the lifting assembly 87 includes a mounting plate 871 fixed on the connecting plate 80, a cam 872 is rotatably provided on the mounting plate 871, a driving motor 873 is provided on one side of the cam 872, a sliding groove is provided on the side wall of the fixed sleeve 81, a convex plate 851 fixed on the baffle 85 is slidably provided in the sliding groove, and the cam 872 is located at the bottom of the convex plate 851;

[0044] After measuring this measuring hole 21, the cam 872 is driven to rotate by the driving motor 873, and the protruding end of the cam 872 moves to the upper part, which pushes the convex plate 851 to move upward, thereby driving the telescopic rod 82 to move upward, allowing the positioning rod 83 to disengage from the measuring hole 21, and then the movable platform 3 moves to the next measuring hole 21. While it moves, the cam 872 continues to rotate so that the protruding end is located at the lower part, so that after moving to the next measuring hole 21, the positioning rod 83 will be directly inserted into the measuring hole 21.

[0045] In one embodiment, a lead screw 22 is rotatably disposed in the base plate 2 , and a movable slider 30 is disposed at the bottom of the movable platform 3 , and the movable slider 30 is sleeved on the lead screw 22 .

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A biosafety cabinet airflow velocity measuring tool, comprising a bottom plate (2) located in a cabinet body (1), a measuring hole (21) being provided on the bottom plate (2), a movable platform (3) being provided on the bottom plate (2), and a vertical pole (4) being provided on the movable platform (3), characterized in that: Also includes: A fixing device (5) is sleeved on the vertical pole (4) and is used to fix the anemometer probe (7); An angle adjustment assembly (6) is arranged on the fixing device (5) and is used to drive the anemometer probe (7) to rotate; The positioning assembly (8) is arranged on the movable platform (3) through a connecting plate (80) and is used to align the anemometer probe (7) with the measuring hole (21).

2. The air flow velocity measuring tool for a biological safety cabinet according to claim 1, characterized in that: The fixing device (5) comprises a movable sleeve (51) sleeved on the vertical pole (4); a fixing ring (52) is arranged on one side of the movable sleeve (51); an angle adjustment assembly (6) is arranged on the fixing ring (52); a rotating disk (53) is arranged on one end of the fixing ring (52); a driven gear (54) is arranged on the other end of the fixing ring (52); vertical grooves are provided on the rotating disk (53) and the driven gear (54); a clamping assembly (55) for clamping an anemometer probe (7) is arranged in the vertical groove; and a locking rod (56) for pressing against the vertical pole (4) is also arranged on the movable sleeve (51).

3. The air flow velocity measuring tool for a biological safety cabinet according to claim 2, characterized in that: The clamping assembly (55) comprises two movable blocks (551) sliding in the vertical slots, a clamping plate (552) being arranged on the movable blocks (551), two vertical plates (554) being arranged on one side of the vertical slots, a bidirectional threaded rod (555) being rotatably arranged between the two vertical plates (554), and a limiting sliding block (553) being sleeved on the bidirectional threaded rod (555) being arranged on one side of the movable blocks (551).

4. The air flow velocity measuring tool for a biological safety cabinet according to claim 3, characterized in that: A roller shaft (556) is disposed at one end of the bidirectional threaded rod (555), and the two roller shafts (556) are connected to each other through a transmission belt (557), and a knob (558) is disposed on the roller shaft (556).

5. The air flow velocity measuring tool for a biological safety cabinet according to claim 2, characterized in that: The angle adjustment assembly (6) comprises a fixing plate (61) fixed on a fixing ring (52), a driving gear (62) being rotatably arranged on the fixing plate (61), and the driving gear (62) is meshed with a driven gear (54).

6. The air flow velocity measuring tool for a biological safety cabinet according to claim 1, characterized in that: The positioning assembly (8) comprises a fixed sleeve (81) fixed on the connecting plate (80), a telescopic rod (82) is slidably arranged in the fixed sleeve (81), a positioning rod (83) is arranged at the bottom end of the telescopic rod (82), a guide rod (84) is arranged at the top end of the telescopic rod (82), a baffle (85) is arranged on the telescopic rod (82), a return spring (86) sleeved on the telescopic rod (82) is arranged between the baffle (85) and the inner top end of the fixed sleeve (81), and a lifting assembly (87) for driving the telescopic rod (82) to move upward is arranged on the connecting plate (80).

7. The airflow velocity measuring tool for a biological safety cabinet according to claim 6, characterized in that: The lifting assembly (87) comprises a mounting plate (871) fixed on the connecting plate (80), a cam (872) being rotatably arranged on the mounting plate (871), a driving motor (873) being arranged on one side of the cam (872), a sliding groove being provided on the side wall of the fixed sleeve (81), a convex plate (851) being slidably arranged in the sliding groove and being fixed on the baffle (85), and the cam (872) being located at the bottom of the convex plate (851).

8. The air flow velocity measuring tool for a biological safety cabinet according to claim 1, characterized in that: A lead screw (22) is rotatably arranged in the bottom plate (2), and a movable slider (30) is arranged at the bottom of the movable platform (3), and the movable slider (30) is sleeved on the lead screw (22).

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