Fuming cupboard equipment based on safety production
By combining a damping shaft, rollers, elastic elements, and an electromagnet in the limit frame design, the problems of easy wear and insufficient strength of the limit device for the lifting window of the fume hood are solved, achieving safe and reliable operation of the lifting window and structural durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ZHENGYUAN INSPECTION & TESTING CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-01
AI Technical Summary
Existing fume hood lifting window limit devices are prone to wear and tear after long-term use, have low strength, or require continuous power supply, resulting in insufficient safety and reliability.
The limit frame design combines a damping pivot, rollers, elastic elements, and electromagnets. The rollers prevent wear, the elastic elements drive the limit frame to rotate, the electromagnet adsorption plate enables wear-free lifting and lowering, and the damping pivot provides cushioning, ensuring the safety and reliability of the lifting window.
It improves the safety and structural load-bearing capacity of the lift window, extends its service life, reduces energy consumption, and avoids the weakening of the limiting effect due to wear or impact.
Smart Images
Figure CN224181645U_ABST
Abstract
Description
A fume hood device based on safe production Technical Field
[0001] This utility model relates to the field of fume hood technology, specifically a fume hood device based on safe production. Background Technology
[0002] Fume hoods, also known as fume hoods, are commonly used in chemical experiments, grinding and polishing processes, and other production steps. They mainly utilize ventilation systems to discharge dust and toxic or harmful gases emitted from inside the hood to designated locations, or to purify the air through internal circulation, preventing dust and toxic or harmful gases from leaking into workshops and laboratories.
[0003] Existing fume hood lift windows typically use friction braking, ratchet locking, or electromagnetic locking to limit their movement after they are raised, preventing them from falling and injuring workers during loading and unloading. However, friction braking is prone to wear and tear, which affects its braking effect. After long-term use, increased wear and reduced friction can cause the lift window to continue sliding down. Ratchet locking has low strength, and the impact force when the lift window falls is large. The tips and roots of the ratchet teeth are weak and easily break due to the impact force. Electromagnetic locking requires continuous power supply, which increases costs. Summary of the Invention
[0004] Therefore, the purpose of this utility model is to provide a fume hood device based on safe production, so as 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 fume hood device based on safe production, comprising a fume hood body, characterized in that: a first support, a second support, and an electromagnet are provided on both sides of the fume hood body, and a limit frame is connected between the first support and the second support through a damping rotating shaft, a roller is connected to the back of the limit frame, and elastic elements and adsorption plates are respectively provided on the sides of the limit frame.
[0006] By adopting the above technical solution, during the raising of the window, rollers prevent wear and tear between the limit frame and the window from contacting each other. Once the window is fully raised, an elastic element drives the limit frame to rotate, moving it to the bottom of the window. When the window falls a short distance, it lands on the limit frame. This minimizes impact damage to the limit frame due to the short fall distance and low impact force. Furthermore, the limit frame physically prevents the window from falling further, preventing wear and tear that could weaken its limiting effect. The limit frame also transfers the window's weight to the first support... The first and second supports prevent the damping shaft from being stressed, thus improving the structural load-bearing capacity. Before the window descends, an electromagnet is energized to generate magnetic attraction. The adsorption plate, made of galvanized steel, can be attracted by the magnet, causing the limit frame to rotate and move away from the bottom of the window to facilitate its descent. After the window descends, the electromagnet can be closed. At this time, the damping shaft is reset by the elastic element, so that the rollers are in contact with the window. The damping shaft also applies resistance and buffer to the rotation of the limit frame, preventing the elastic element from rebounding and causing the limit frame to have too much kinetic energy, which could damage the window, the fume hood body, and the limit frame.
[0007] Furthermore, a fixed window is connected to the upper part of the interior of the fume hood body, guide rails are installed on both sides of the interior of the fume hood body, and a lifting window is connected between the two guide rails. Two operating gloves are installed on the lower part of the outer surface of the lifting window.
[0008] By adopting the above technical solution, workers can raise the lifting window using the existing fume hood's built-in lifting mechanism to place materials and equipment needed for production into the fume hood body. After loading, workers can lower the lifting window using the existing fume hood's built-in lifting mechanism to prevent pollutants from spreading into the room during production. Once the lifting window is closed, workers can put their hands in operating gloves to operate the materials and equipment inside the fume hood body through the lifting window. The operating gloves protect workers' hands from corrosion and other injuries, and also prevent pollutants from spreading into the room. During production, the existing fume hood's built-in external or internal circulation ventilation system discharges or purifies pollutants generated during production within the fume hood body. After production is completed, workers remove their hands from the operating gloves, and then raise the lifting window using the existing fume hood's built-in lifting mechanism to unload materials.
[0009] Furthermore, a storage cabinet is installed at the bottom of the fume hood body.
[0010] By adopting the above technical solution, staff can temporarily store materials, equipment, and other items needed for production in lockers.
[0011] Furthermore, the top of the limiting frame contacts the bottom of the lifting window, and the limiting frame is rotatably connected to the first bracket and the second bracket via a damping pivot.
[0012] By adopting the above technical solution, when the lift window falls a short distance, it will fall onto the limiting frame. Firstly, the short falling distance and small impact force reduce the impact damage to the limiting frame. Secondly, the limiting frame prevents the lift window from falling by physically blocking it, and will not be affected by wear and tear, thus preventing the limiting effect from weakening.
[0013] Furthermore, the roller contacts one side of the outer surface of the lift window.
[0014] By adopting the above technical solution, rollers are used to prevent wear and tear between the limit frame and the window during the lifting process.
[0015] Furthermore, the adsorption plate is made of galvanized steel and its surface is coated with anti-corrosion paint.
[0016] By adopting the above technical solution, when the lifting window needs to be lowered, the electromagnet is energized to generate magnetic attraction. The adsorption plate is made of galvanized steel and can be attracted by the magnet, causing the limit frame to rotate and move away from the bottom of the lifting window. The galvanized steel is coated with anti-corrosion paint to increase its anti-corrosion performance and extend its service life.
[0017] Furthermore, the top of the limiting frame contacts the bottom of the first bracket, and the bottom of the limiting frame contacts the top of the second bracket.
[0018] By adopting the above technical solution, the limiting frame will transfer the weight of the lifting window to the first and second supports, avoiding stress on the damping pivot and improving the structural load-bearing capacity.
[0019] Furthermore, the roller is provided with a silicone rubber sleeve on its exterior.
[0020] By adopting the above technical solution, by wrapping the outer ring of the roller with a silicone rubber elastic sleeve, the impact force when the roller comes into contact with the lifting window can be effectively reduced, which facilitates the protection of the lifting window. The silicone rubber elastomer can be fixed to the outer ring of the roller after roughening by silicone rubber adhesive.
[0021] Furthermore, the height of the first bracket is greater than the height of the second bracket.
[0022] By adopting the above technical solution, when the limiting frame physically blocks the riser window from falling, the first bracket mainly bears the force. By increasing the height of the first bracket, the contact area between the first bracket and the main body of the fume hood is increased, thereby improving the connection strength of the first bracket.
[0023] Furthermore, multiple ribs are fixed to the top of the first bracket and the bottom of the second bracket, and the multiple ribs are distributed at equal intervals.
[0024] By adopting the above technical solution, the structural strength of the first and second supports is increased by setting multiple ribs, thus preventing the first and second supports from bending and deforming under stress.
[0025] In summary, the present invention has the following main advantages:
[0026] 1. This utility model, through the arrangement of a first bracket, a second bracket, a limiting frame, and an elastic element, allows the limiting frame to rotate and move to the bottom of the window after the window is fully raised, driven by the elastic element. When the window falls a short distance, it will land on the limiting frame. This design reduces impact damage to the limiting frame due to the short fall distance and low impact force. Furthermore, the limiting frame prevents the window from falling by physically blocking it, preventing wear and tear that could weaken the limiting effect. The limiting frame also transfers the weight of the window to the first and second brackets, preventing stress on the damping shaft and improving structural load-bearing capacity. Compared to friction braking, wear has no impact on the limiting effect; compared to ratchet locking, it has a smaller impact force and a robust structure that is less prone to breakage; and compared to electromagnetic locking, it requires no continuous power supply, making it energy-efficient and environmentally friendly.
[0027] 2. This utility model, through the setting of rollers and damping shafts, avoids wear caused by contact between the limit frame and the lifting window during the lifting process. The damping shaft applies resistance and buffer to the rotation of the limit frame, preventing the elastic element from rebounding and driving the limit frame with large kinetic energy, which could damage the lifting window, the fume hood body, and the limit frame. This provides safety protection and extends the service life of the structure.
[0028] 3. This utility model uses an electromagnet and an adsorption plate. When the lifting window needs to be lowered, the electromagnet is energized to generate a magnetic force. The adsorption plate is made of galvanized steel and can be attracted by a magnet, causing the limit frame to rotate and move away from the bottom of the lifting window, so that the lifting window can be lowered. After the lifting window is lowered, the electromagnet can be closed. It is convenient to unlock, and compared with electromagnetic locks, the electromagnet has a smaller area, which saves procurement costs. Attached Figure Description
[0029] Figure 1 is a schematic diagram of the structure of this utility model when it is closed;
[0030] Figure 2 is a schematic diagram of the structure of this utility model when it is opened;
[0031] Figure 3 is a schematic diagram of the first support structure of this utility model;
[0032] Figure 4 is a schematic diagram of the limiting frame structure of this utility model;
[0033] Figure 5 is a schematic diagram of the exploded structure of the second support of this utility model.
[0034] In the diagram: 1. Fume hood body; 2. Fixed window; 3. Guide rail; 4. Lifting window; 5. Operating gloves; 6. Storage cabinet; 7. First support; 8. Second support; 9. Limiting frame; 10. Damping pivot; 11. Roller; 12. Elastic element; 13. Electromagnet; 14. Adsorption plate. Detailed Implementation
[0035] 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.
[0036] The embodiments of this utility model will be described below based on its overall structure.
[0037] Example 1:
[0038] A fume hood device based on safe production, as shown in Figures 1-5, includes a fume hood body 1. A first support 7, a second support 8, and an electromagnet 13 are arranged on both sides of the fume hood body 1. A limit frame 9 is connected between the first support 7 and the second support 8 via a damping shaft 10. The top of the limit frame 9 contacts the bottom of the lifting window 4. The limit frame 9 is rotatably connected to the first support 7 and the second support 8 via the damping shaft 10. The top of the limit frame 9 contacts the bottom of the first support 7, and the bottom of the limit frame 9 contacts the second support 8. The top of the limit frame 9 is in contact with the bottom of the window 4. Rollers 11 are connected to the back of the limit frame 9, and the rollers 11 contact one side of the outer surface of the window 4. Elastic elements 12 and suction plates 14 are respectively provided on the sides of the limit frame 9. The elastic element 12 is a tension spring, and the suction plate 14 is made of galvanized steel and coated with anti-corrosion paint. During the lifting process of the window 4, the rollers 11 prevent wear caused by contact between the limit frame 9 and the window 4. When the window 4 is fully raised, the elastic element 12 drives the limit frame 9 to rotate, thus preventing the window 4 from moving. The limiting frame 9 moves to the bottom of the lifting window 4; when the lifting window 4 falls a short distance, it will land on the limiting frame 9. Firstly, the short fall distance and low impact force reduce damage to the limiting frame 9. Secondly, the limiting frame 9 prevents the lifting window 4 from falling by physically blocking it, thus avoiding wear and tear that could weaken its limiting effect. Furthermore, the limiting frame 9 transfers the weight of the lifting window 4 to the first support 7 and the second support 8, preventing stress on the damping pivot 10 and improving the structural load-bearing capacity. Before the lifting window 4 descends, it is controlled by electromagnet 1... When energized, a magnetic attraction force is generated. The adsorption plate 14, made of galvanized steel, can be attracted by a magnet, causing the limit frame 9 to rotate and move away from the bottom of the lifting window 4, so that the lifting window 4 can descend. After the lifting window 4 descends, the electromagnet 13 can close. At this time, the damping shaft 10 is driven to reset by the elastic element 12, so that the roller 11 is in contact with the lifting window 4. The damping shaft 10 also applies resistance and buffer to the rotation of the limit frame 9, preventing the elastic element 12 from rebounding and driving the limit frame 9 with too much kinetic energy, which could damage the lifting window 4, the fume hood body 1, and the limit frame 9.
[0039] Referring to Figures 1 and 2, in the above embodiment, a fixed window 2 is connected to the upper part of the interior of the fume hood body 1. Guide rails 3 are installed on both sides of the interior of the fume hood body 1, and a lifting window 4 is connected between the two guide rails 3. Two operating gloves 5 are installed on the lower part of the outer surface of the lifting window 4. A storage cabinet 6 is installed at the bottom of the fume hood body 1. When using the fume hood, the staff can temporarily store the materials and equipment needed for production through the storage cabinet 6. Afterwards, the staff can drive the lifting window 4 to rise through the existing lifting mechanism of the fume hood, so that the staff can put the materials and equipment needed for the production process into the fume hood body 1. After the loading is completed, the staff can drive the lifting window 4 to rise through the existing lifting mechanism of the fume hood. The lifting window 4 descends to prevent pollutants from spreading into the room during production. After the lifting window 4 is closed, workers can put their hands into the operating gloves 5 to operate the materials and equipment inside the fume hood body 1 through the lifting window 4. The operating gloves 5 protect the workers' hands from corrosion and other injuries, and also prevent pollutants from spreading into the room. During production, the pollutants generated in the fume hood body 1 during production are discharged or purified through the existing external or internal circulation ventilation system. After production is completed, workers remove their hands from the operating gloves 5, and then the workers drive the lifting window 4 to rise through the existing lifting mechanism of the fume hood to unload materials.
[0040] Example 2:
[0041] Based on the above embodiment one, the following settings are now implemented to enhance protection.
[0042] Referring to Figures 1, 3, 4 and 5, in the above embodiment, a silicone rubber sleeve is provided on the outside of the roller 11. By wrapping the outer ring of the roller 11 with the silicone rubber elastic sleeve, the impact force when the roller 11 comes into contact with the lifting window 4 can be effectively reduced, which facilitates the protection of the lifting window 4. The silicone rubber elastomer can be fixed to the outer ring of the roller after roughening by silicone rubber adhesive.
[0043] Example 3:
[0044] Based on the above embodiment one, the following settings are now adopted to increase structural strength.
[0045] Referring to Figures 1-5, in the above embodiment, the height of the first bracket 7 is greater than the height of the second bracket 8. When the limiting frame 9 physically blocks the lifting window 4 from falling, the first bracket 7 mainly bears the force. By increasing the height of the first bracket 7, the contact area between the first bracket 7 and the fume hood body 1 is increased, thereby improving the connection strength of the first bracket 7. Multiple ribs are fixed at the top of the first bracket 7 and the bottom of the second bracket 8. The multiple ribs are evenly distributed. By setting multiple ribs, the structural strength of the first bracket 7 and the second bracket 8 is increased, and the first bracket 7 and the second bracket 8 are prevented from bending and deforming under force.
[0046] The implementation principle of this utility model is as follows: First, it should be clearly noted that this technical solution is mainly for protection when workers are loading and unloading materials after the lifting window 4 is fully opened, to prevent the lifting window 4 from falling. During the lifting process, traditional methods such as friction braking and ratchet locking can still be used to prevent the lifting window 4 from falling. This technical solution can only play a better anti-fall effect after the lifting window 4 is fully opened. For example, compared with friction braking, wear has no impact on the limiting effect; compared with ratchet locking, the impact force is smaller and the structure is more robust and not easy to break; compared with electromagnetic locking, it does not require continuous power supply, which is energy-saving and environmentally friendly.
[0047] When using the fume hood, workers can temporarily store materials and equipment needed for production in the storage cabinet 6. Then, workers can use the built-in lifting mechanism of the fume hood to raise the lifting window 4, allowing them to place the materials and equipment needed for production into the fume hood body 1. After loading, workers can use the built-in lifting mechanism of the fume hood to lower the lifting window 4, preventing pollutants from escaping into the room during production. After the lifting window 4 is closed, workers can put their hands in operating gloves 5 to operate the materials and equipment inside the fume hood body 1 through the lifting window 4. The operating gloves 5 protect workers' hands from corrosion and other injuries, and also prevent pollutants from escaping into the room. During production, the built-in external or internal circulation ventilation system of the fume hood discharges or purifies pollutants generated during production within the fume hood body 1. After production is completed, workers remove their hands from the operating gloves 5, and then use the built-in lifting mechanism of the fume hood to raise the lifting window 4 to unload materials.
[0048] During the lifting of the window 4, the rollers 11 prevent contact and wear between the limiting frame 9 and the window 4. After the window 4 is fully raised, the elastic element 12 drives the limiting frame 9 to rotate, moving it to the bottom of the window 4. When the window 4 falls a short distance, it will land on the limiting frame 9. This reduces the impact on the limiting frame 9 due to the short fall distance and low impact force. Furthermore, the limiting frame 9 prevents the window 4 from falling by physically blocking it, thus avoiding wear and tear that could weaken its limiting effect. The limiting frame 9 also transfers the weight of the window 4 to the first support 7 and the second support 8, preventing stress on the damping shaft 10 and improving the structural load-bearing capacity. Before the window 4 descends, the electromagnet 13... The electromagnet generates a magnetic attraction force, and the adsorption plate 14, made of galvanized steel, can be attracted by a magnet. If the electromagnet 13 is damaged or cannot be opened, the limit frame 9 can be manually rotated to move it away from the bottom of the lifting window 4, so that the lifting window 4 can descend. After the lifting window 4 descends, the electromagnet 13 can be closed. At this time, the damping shaft 10 is driven to reset by the elastic element 12, so that the roller 11 is in contact with the lifting window 4. The damping shaft 10 also applies resistance and buffer to the rotation of the limit frame 9, preventing the elastic element 12 from rebounding and driving the limit frame 9 with too much kinetic energy, which could damage the lifting window 4, the fume hood body 1, and the limit frame 9. At the same time, the rubber sleeve on the roller 11 can also reduce the impact force when the roller 11 contacts the lifting window 4.
[0049] 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 fume hood device based on safe production, comprising a fume hood body (1), characterized in that: The main body (1) of the fume hood is provided with a first bracket (7), a second bracket (8) and an electromagnet (13) on both sides. The first bracket (7) and the second bracket (8) are connected to a limit frame (9) through a damping shaft (10). The limit frame (9) is connected to a roller (11) on its back. The limit frame (9) is provided with an elastic element (12) and an adsorption plate (14) on its side.
2. The fume hood equipment based on safe production according to claim 1, characterized in that: The fume hood body (1) has a fixed window (2) connected to the upper part inside. The fume hood body (1) has guide rails (3) installed on both sides inside. A lifting window (4) is connected between the two guide rails (3). Two operating gloves (5) are provided on the lower part of the outer surface of the lifting window (4).
3. The fume hood equipment based on safe production according to claim 2, characterized in that: A storage cabinet (6) is installed at the bottom of the main body (1) of the fume hood.
4. The safety production based fume hood apparatus according to claim 2, wherein: The top of the limiting frame (9) is in contact with the bottom of the lifting window (4), and the limiting frame (9) is rotatably connected to the first bracket (7) and the second bracket (8) through the damping pivot (10).
5. The fume hood equipment based on safe production according to claim 1, characterized in that: The roller (11) is in contact with one side of the outer surface of the lifting window (4).
6. The fume hood equipment based on safe production according to claim 1, characterized in that: The adsorption plate (14) is made of galvanized steel and the surface of the adsorption plate (14) is coated with anti-corrosion paint.
7. The safety production based fume hood apparatus of claim 4, wherein: The top of the limiting frame (9) is in contact with the bottom of the first bracket (7), and the bottom of the limiting frame (9) is in contact with the top of the second bracket (8).
8. The fume hood equipment based on safe production according to claim 5, characterized in that: The roller (11) is provided with a silicone rubber sleeve on the outside.
9. The safety production based fume hood apparatus of claim 7, wherein: The height of the first bracket (7) is greater than the height of the second bracket (8).
10. The fume hood equipment based on safe production according to claim 9, characterized in that: Multiple ribs are fixed to the top of the first bracket (7) and the bottom of the second bracket (8), and the multiple ribs are distributed at equal intervals.