Safe fuming cupboard for laboratory
By using a servo motor-driven lifting plate and hook system, combined with a perforated partition plate and dustproof net, the problem of insufficient space in the fume hood is solved, enabling convenient storage and retrieval of experimental materials and purification of exhaust gas, thereby improving the efficiency and safety of experimental operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-13
AI Technical Summary
When using existing fume hoods, the work surface is often cramped due to the presence of laboratory equipment such as sinks, resulting in limited space for storing experimental materials. When there are a large number of experimental materials, this can encroach on the operating space and cause inconvenience.
A servo motor is used in conjunction with a worm gear reducer to drive the lead screw to rotate. The lifting plate and the towing hook work together to move and replace the container, which increases the storage space for experimental materials. The placement of experimental materials is optimized by setting up a perforated partition plate and a dustproof net.
It increases the storage space for experimental materials, avoids excessive material encroachment on the operating space, facilitates the retrieval and replacement of experimental materials, and improves the convenience of experimental operations. At the same time, the combination of fans and air purification equipment avoids environmental pollution from exhaust gases.
Smart Images
Figure CN223988873U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laboratory equipment technology, specifically a laboratory safety fume hood. Background Technology
[0002] Laboratory safety fume hoods are mainly used for chemical experiments, biological experiments, and teaching experiments. They create negative pressure inside the fume hood through ventilation equipment such as fans, thereby preventing pollutants from leaking into the laboratory during the experiment.
[0003] When using existing fume hoods, the work surface is often occupied by instruments used in experiments, such as water tanks, leaving very little space for storing experimental materials. If there are a large number of experimental materials, the space will be encroached upon, making it inconvenient to use. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a laboratory safety fume hood to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a laboratory safety fume hood, comprising a fume hood body, a temporary storage cabinet connected to the bottom of the fume hood body, and a second sealing door hinged to the outer surface of the temporary storage cabinet; worm gear reducers are installed on both sides of the top of the temporary storage cabinet, and servo motors are installed at the input ends of the two worm gear reducers, and lead screws are connected to the output ends of the two worm gear reducers, with a lifting plate connecting the two lead screws; a second electric cylinder and a placement basin are respectively arranged inside the temporary storage cabinet, and a towing hook is connected to the output end of the second electric cylinder, and a connecting seat is fixed on one side of the placement basin; a first electric cylinder is installed on the inner wall of the fume hood body, and a perforated partition plate is connected to the output end of the first electric cylinder.
[0006] By adopting the above technical solution, a servo motor, in conjunction with a worm gear reducer, drives a lead screw to rotate. The rotation of the lead screw causes the lifting plate to move upwards, thus moving the lifting plate to the side below one of the placement basins, with the top of the lifting plate and the bottom of the placement basin at the same level. The servo motor and worm gear reducer increase the stepping accuracy of the lifting plate, and the worm gear reducer can self-lock to prevent the lifting plate from falling. Then, the output end of one of the second electric cylinders pushes a tow hook, which presses against the placement basin, causing the second electric cylinder to push the basin through the tow hook, moving the basin to the top of the lifting plate. Subsequently, the servo motor and worm gear reducer drive the lead screw to continue rotating, moving the lifting plate to the top and thus moving the placement basin to the top, facilitating the use of experimental materials by personnel. When materials need to be replaced, the lifting plate carries the placement basin back to its original height. At this time, the tow hook inserts into the connecting seat on the side of the placement basin, and the second electric cylinder pulls the tow hook back, removing the placement basin from the lifting plate. The lifting plate then rises or falls to the side above another placement basin, facilitating the replacement of other experimental materials.
[0007] Furthermore, the tow hook has a U-shaped longitudinal section and the connecting seat has a C-shaped cross section, and the connecting seat is detachably connected to the tow hook.
[0008] By adopting the above technical solution, the lifting plate carries the placement basin back to its original height. At this time, the tow hook is inserted into the connecting seat on the side of the placement basin. The second electric cylinder pulls the tow hook back to remove the placement basin from the lifting plate. After that, the lifting plate rises or falls and moves to the side above another placement basin, which makes it easier to replace other experimental materials.
[0009] Furthermore, the placement basin is slidably connected to the temporary storage cabinet and the lifting plate, respectively.
[0010] By adopting the above technical solution, the output end of the second electric cylinder pushes the tow hook to move. At this time, the tow hook abuts against the placement basin, so that the second electric cylinder pushes the placement basin through the tow hook to move the placement basin to the top of the lifting plate.
[0011] Furthermore, the lifting plate is threadedly connected to the lead screw, and the lifting plate is slidably connected to the temporary storage cabinet.
[0012] By adopting the above technical solution, the servo motor, in conjunction with the worm gear reducer, drives the lead screw to rotate, and the rotation of the lead screw causes the lifting plate to move up or down.
[0013] Furthermore, there are four of each of the second electric cylinder, tow hook, placement basin, and connecting seat, and the four second electric cylinders, tow hooks, placement basins, and connecting seats are distributed at equal intervals.
[0014] By adopting the above technical solution, the number of the second electric cylinder, tow hook, placement basin, and connecting seat can be increased to accommodate more experimental materials.
[0015] Furthermore, the porous partition plate is slidably connected to the fume hood body.
[0016] By adopting the above technical solution, if the experimental materials are few, the staff can turn on the first electric cylinder. The first electric cylinder drives the perforated partition plate to move and separate the fume hood body from the temporary storage cabinet. At this time, the staff can directly place the experimental materials on the perforated partition plate, saving the waiting time for placing the basin to move and lift.
[0017] Furthermore, a fan and a first sealing door are respectively installed on the upper part of the interior of the fume hood, and operating gloves are worn on both sides of the outer surface of the first sealing door.
[0018] By adopting the above technical solution, the fan is connected to the external air purification equipment through a pipeline to avoid exhaust gas pollution of the atmosphere. Before the experiment, the staff puts the equipment needed for the experiment into the main body of the fume hood and closes the first sealed door. The staff turns on the fan, and after the fan starts, it exhausts the air in the main body of the fume hood. At this time, the main body of the fume hood is under negative pressure, which draws the air in the laboratory into the main body of the fume hood and then discharges it to the external air purification equipment for treatment, thus avoiding exhaust gas pollution of the environment during the experiment. The staff puts their hands into two operating gloves to avoid contact with toxic and harmful substances.
[0019] Furthermore, a control panel is installed on the inner wall of the fume hood body, and the servo motor, the first electric cylinder, and the second electric cylinder are all electrically connected to the control panel.
[0020] By adopting the above technical solution, staff can control the servo motor, the first electric cylinder, and the second electric cylinder through the control panel inside the fume hood.
[0021] Furthermore, the outer surface of the temporary storage cabinet is provided with multiple dustproof nets.
[0022] By adopting the above technical solution, due to the setting of the dustproof net and the porous partition plate, the airflow in the laboratory passes through the dustproof net, the temporary storage cabinet, the porous partition and the main body of the fume hood in sequence before entering the fan. During this process, the airflow carries away the gas in the temporary storage cabinet as it passes through it, thus preventing the gas emitted by the experimental materials from remaining in the temporary storage cabinet.
[0023] In summary, the present invention has the following main advantages:
[0024] 1. This utility model, through the setting of a temporary storage cabinet, a second sealed door and a placement basin, allows excess experimental materials to be placed in the placement basin before the experiment by opening the second sealed door, thus avoiding excessive experimental materials taking up operating space. After placement, the staff closes the second sealed door, thereby sealing and temporarily storing the experimental materials; increasing storage space and preventing excessive materials from affecting the operating space.
[0025] 2. This utility model, through the arrangement of a lead screw, lifting plate, tow hook, and connecting seat, allows for the following mechanism: When material is needed, a servo motor, in conjunction with a worm gear reducer, drives the lead screw to rotate. The rotation of the lead screw causes the lifting plate to move upwards, thus positioning it below one of the placement basins. The top of the lifting plate is level with the bottom of the placement basin. The servo motor and worm gear reducer increase the stepping accuracy of the lifting plate, and the worm gear reducer self-locks to prevent the lifting plate from falling. Then, the output of one of the second electric cylinders pushes the tow hook, which then presses against the placement basin, thus moving the second... An electric cylinder pushes a placement basin via a tow hook, moving the basin to the top of the lifting plate. A servo motor, in conjunction with a worm gear reducer, drives a lead screw to continue rotating, moving the lifting plate to the top and thus the placement basin there, facilitating access to the experimental materials. When materials need to be replaced, the lifting plate returns the basin to its original height. At this point, the tow hook inserts into a connecting seat on the side of the basin, and a second electric cylinder pulls the tow hook back, removing the basin from the lifting plate. The lifting plate then rises or falls to the side of another placement basin, facilitating the replacement of other experimental materials and enabling convenient access.
[0026] 3. With the setting of the first electric cylinder and the perforated partition plate, when there are few experimental materials, the first electric cylinder drives the perforated partition plate to move and separate the fume hood body from the temporary storage cabinet. At this time, the experimental materials can be placed directly on the perforated partition plate, saving the waiting time for the placement of the basin to move and lift. It is also convenient to use when there are few experimental materials. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of this utility model;
[0028] Figure 2 This is a side sectional view of the present invention.
[0029] Figure 3 This is a schematic diagram of the temporary storage cabinet structure of this utility model;
[0030] Figure 4 This is a schematic diagram of the placement basin structure of this utility model.
[0031] In the diagram: 1. Fume hood body; 2. Fan; 3. First sealing door; 4. Operating gloves; 5. Temporary storage cabinet; 6. Dustproof net; 7. Second sealing door; 8. Servo motor; 9. Worm gear reducer; 10. Lead screw; 11. Lifting plate; 12. First electric cylinder; 13. Perforated partition plate; 14. Second electric cylinder; 15. Towing hook; 16. Placement basin; 17. Connecting seat; 18. Control panel. Detailed Implementation
[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0033] The embodiments of this utility model will be described below based on its overall structure.
[0034] Example 1:
[0035] A laboratory safety fume hood, such as Figures 1-4As shown, the system includes a fume hood body 1, a temporary storage cabinet 5 connected to the bottom of the fume hood body 1, and a second sealing door 7 hinged to the outer surface of the temporary storage cabinet 5. Worm gear reducers 9 are installed on both sides of the top of the temporary storage cabinet 5. Servo motors 8 are installed at the input ends of both worm gear reducers 9, and lead screws 10 are connected to the output ends of both worm gear reducers 9. A lifting plate 11 is connected between the two lead screws 10, and the lifting plate 11 is threadedly connected to the lead screws 10 and slidably connected to the temporary storage cabinet 5. A second electric cylinder 14 and a placement basin 16 are respectively installed inside the temporary storage cabinet 5. The placement basin 16 is slidably connected to the temporary storage cabinet 5 and the lifting plate 11 respectively. The output end of the second electric cylinder 14... A tow hook 15 is connected, with a "U"-shaped longitudinal section. A connecting seat 17 with a "C"-shaped cross section is fixed to one side of the placement basin 16. The connecting seat 17 is detachably connected to the tow hook 15. Four second electric cylinders 14, four tow hooks 15, four placement basins 16, and four connecting seats 17 are provided, and the four second electric cylinders 14, four tow hooks 15, four placement basins 16, and four connecting seats 17 are equidistantly distributed. A first electric cylinder 12 is installed on the inner wall of the fume hood body 1. The output end of the first electric cylinder 12 is connected to a perforated partition plate 13, which is slidably connected to the fume hood body 1. A control panel is installed on the inner wall of the fume hood body 1. A servo motor 8, a first electric cylinder 12, and The second electric cylinders 14 are all electrically connected to the control panel 18. The servo motor 8, in conjunction with the worm gear reducer 9, drives the lead screw 10 to rotate. After the lead screw 10 rotates, it causes the lifting plate 11 to move upward, thereby moving the lifting plate 11 to the side and below one of the placement basins 16, with the top of the lifting plate 11 and the bottom of the placement basin 16 at the same level. The servo motor 8, in conjunction with the worm gear reducer 9, can increase the stepping accuracy of the lifting plate 11, and the worm gear reducer 9 can self-lock to prevent the lifting plate 11 from falling. Then, the output end of one of the second electric cylinders 14 pushes the tow hook 15 to move. At this time, the tow hook 15 abuts against the placement basin 16, thereby causing the second electric cylinder 14 to move through the tow hook 15. Pushing the placement basin 16 moves it to the top of the lifting plate 11. Then, the servo motor 8, in conjunction with the worm gear reducer 9, drives the lead screw 10 to continue rotating, causing the lifting plate 11 to move to the top, thereby moving the placement basin 16 to the top, making it convenient for staff to use the experimental materials. When it is necessary to change the materials, the lifting plate 11 carries the placement basin 16 back to its original height. At this time, the tow hook 15 is inserted into the connecting seat 17 on the side of the placement basin 16. The second electric cylinder 14 pulls the tow hook 15 back, causing the placement basin 16 to be removed from the lifting plate 11. After that, the lifting plate 11 rises or falls and moves to the side above another placement basin 16, making it convenient to change other experimental materials.
[0036] See Figure 1 and Figure 2In the above embodiment, a fan 2 and a first sealing door 3 are respectively installed on the upper part of the fume hood body 1. Both sides of the outer surface of the first sealing door 3 are fitted with operating gloves 4. The fan 2 is connected to the external air purification equipment through a pipe to prevent exhaust gas from polluting the atmosphere. Before the experiment, the staff puts the equipment needed for the experiment into the fume hood body 1 and closes the first sealing door 3. The staff turns on the fan 2. After the fan 2 starts, it exhausts the air in the fume hood body 1. At this time, the fume hood body 1 is under negative pressure, thereby drawing the air in the laboratory into the fume hood body 1 and then discharging it to the external air purification equipment for treatment, so as to avoid exhaust gas from polluting the environment during the experiment. The staff puts their hands into the two operating gloves 4 to prevent them from coming into contact with toxic and harmful substances.
[0037] Example 2:
[0038] Based on the above embodiment 1, in order to prevent the gases emitted from the experimental materials from remaining in the temporary storage cabinet 5, the following settings are adopted.
[0039] See Figure 2 and Figure 3 In the above embodiment, the outer surface of the temporary storage cabinet 5 is provided with multiple dustproof nets 6. Due to the setting of the dustproof nets 6 and the perforation of the porous partition plate 13, the laboratory airflow passes through the dustproof nets 6, the temporary storage cabinet 5, the porous partition and the fume hood body 1 in sequence before entering the fan 2. During this period, the airflow carries away the gas in the temporary storage cabinet 5 as it passes through the temporary storage cabinet 5, thus preventing the gas volatilized from the experimental materials from remaining in the temporary storage cabinet 5.
[0040] The implementation principle of this utility model is as follows: First, the staff connects the fan 2 to the external air purification equipment through the pipe to avoid exhaust gas from polluting the atmosphere. Before the experiment, the staff puts the equipment needed for the experiment into the fume hood body 1 and closes the first sealing door 3. The staff turns on the fan 2. After the fan 2 starts, it exhausts the air in the fume hood body 1. At this time, the fume hood body 1 is under negative pressure, thereby drawing the air in the laboratory into the fume hood body 1. Due to the setting of the dustproof net 6 and the porous partition plate 13, the airflow in the laboratory passes through the dustproof net 6, the temporary storage cabinet 5, the porous partition and the fume hood body 1 in sequence before entering the fan 2. Then it is discharged to the external air purification equipment for treatment, avoiding exhaust gas pollution of the environment during the experiment.
[0041] If there are many experimental materials, the staff first turns off the first electric cylinder 12. After the first electric cylinder 12 is turned off, the output end drives the porous partition plate 13 to retract into the inner wall of the fume hood to avoid affecting the subsequent rise of the placement basin 16. Then, the staff opens the second sealing door 7 and places the excess experimental materials into the placement basin 16 to avoid the experimental materials taking up too much operating space. After placement, the staff closes the second sealing door 7 to temporarily store the experimental materials. During this period, the airflow passes through the temporary storage cabinet 5 and carries away the gas in the temporary storage cabinet 5, preventing the gas volatilized from the experimental materials from remaining in the temporary storage cabinet 5. If there are few experimental materials, the staff can turn on the first electric cylinder 12. The first electric cylinder 12 drives the porous partition plate 13 to move and separate the fume hood body 1 from the temporary storage cabinet 5. At this time, the staff can directly place the experimental materials on the porous partition plate 13, saving the waiting time for the placement basin 16 to move and rise.
[0042] During the experiment, the staff put their hands into two operating gloves 4 to avoid contact with toxic and harmful substances. When it is necessary to use experimental materials, the staff can control the servo motor 8, the first electric cylinder 12 and the second electric cylinder 14 through the control panel 18 inside the fume hood body 1.
[0043] Servo motor 8, in conjunction with worm gear reducer 9, drives lead screw 10 to rotate. The rotation of lead screw 10 causes lifting plate 11 to move upwards, thus moving lifting plate 11 to the side and below one of the placement basins 16, with the top of lifting plate 11 and the bottom of placement basin 16 at the same horizontal plane. Servo motor 8, in conjunction with worm gear reducer 9, increases the stepping accuracy of lifting plate 11, and worm gear reducer 9 can self-lock to prevent lifting plate 11 from falling. Then, the output end of one of the second electric cylinders 14 pushes the tow hook 15 to move. At this time, tow hook 15 abuts against placement basin 16, thus causing second electric cylinder 14 to push placement basin 16 through tow hook 15, moving placement basin 16 to the top of lifting plate 11. Subsequently, servo motor 8, in conjunction with worm gear reducer 9, drives lead screw 10 to continue rotating, moving lifting plate 11 to the top, thereby moving placement basin 16 to the top, making it convenient for staff to use the experimental materials.
[0044] When it is necessary to change materials, the lifting plate 11 carries the placement basin 16 back to its original height. At this time, the tow hook 15 is inserted into the connecting seat 17 on the side of the placement basin 16. The second electric cylinder 14 pulls the tow hook 15 back to remove the placement basin 16 from the lifting plate 11. After that, the lifting plate 11 rises or falls and moves to the side above another placement basin 16, so as to facilitate the replacement of other experimental materials.
[0045] It should be noted that the lifting plate 11 is similar to an elevator that moves up and down to different floors to select different materials. Although the movement position of the lifting plate 11 can be calculated by controlling the number of rotations of the lead screw 10 through the servo motor 8, in order to further improve accuracy and stability, it is possible to add sensing structures such as through-beam photoelectric sensors, magnetic scales, laser rangefinders, and limit switches for precise positioning. The use of sensors in elevators is well known and belongs to the field of existing technology. The structure and circuit are too complicated, so they will not be described in detail. Similarly, the main body 1 of the fume hood is also existing technology. Therefore, this technical solution only provides a simple description of most of its functions, and the detailed content, functions and principles are not described in detail.
[0046] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A laboratory safety fume hood comprising a fume hood body (1), characterized in that: The fume hood body (1) bottom is connected with the temporary storage cabinet (5), and the temporary storage cabinet (5) outer surface is hinged with the second sealing door (7); The temporary storage cabinet (5) top two sides are each installed with the worm gear reducer (9), and the two worm gear reducers (9) input ends are each installed with the servo motor (8), two The output ends of the worm gear reducer (9) are each connected with the lead screw (10), and the two lead screws (10) are connected with the lifting plate (11); The temporary storage cabinet (5) inner portion is provided with the second electric cylinder (14) and the placing basin (16) respectively, and the second electric cylinder (14) output end is connected with the drag hook (15), the placing basin (16) one side is fixed with the connecting seat (17); The fume hood body (1) inner wall is installed with the first electric cylinder (12), and the first electric cylinder (12) output end is connected with the multi-hole partition plate (13).
2. The laboratory safety fume hood of claim 1, wherein: The drag hook (15) longitudinal section is in the shape of "U", and the connecting seat (17) cross section is in the shape of "C", the connecting seat (17) and the drag hook (15) are detachably connected.
3. The laboratory safety fume hood of claim 2, wherein: The placing basin (16) is respectively connected with the temporary storage cabinet (5) and the lifting plate (11) slidingly.
4. The laboratory safety fume hood of claim 3, wherein: The lifting plate (11) is threadedly connected with the lead screw (10), and the lifting plate (11) is slidingly connected with the temporary storage cabinet (5).
5. The laboratory safety fume hood of claim 4, wherein: The second electric cylinder (14), the drag hook (15), the placing basin (16) and the connecting seat (17) are provided with four, and the four second electric cylinders (14), the drag hooks (15), the placing basins (16) and the connecting seats (17) are equidistantly distributed.
6. The laboratory safety hood of claim 5, wherein: The multi-hole partition plate (13) is slidingly connected with the fume hood body (1).
7. The laboratory safety hood of claim 1, wherein: The fume hood body (1) inside upper portion is provided with the fan (2) and the first sealing door (3) respectively, and the first sealing door (3) outer surface two sides are each penetrated with the operating glove (4).
8. The laboratory safety hood of claim 1, wherein: The fume hood body (1) inner wall is installed with the control panel, and the servo motor (8), the first electric cylinder (12) and the second electric cylinder (14) are electrically connected with the control panel (18).
9. The laboratory safety hood of claim 1, wherein: The temporary storage cabinet (5) outer surface is provided with a plurality of dustproof nets (6).