Fume hood stack protection structure
By installing baffles and flow guides at the flue inlet, combined with dust collection components, unextinguished sparks generated during plastic combustion experiments can be effectively intercepted and collected, solving the problems of flue inner wall erosion and fire hazards, and achieving higher interception efficiency and extended maintenance cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING JU LING YAN PLASTIC CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-05
AI Technical Summary
In plastic combustion experiments, unextinguished sparks can be drawn into the flue by the fume hood exhaust system, potentially causing erosion or deformation of the flue's inner wall or posing a fire hazard. Existing technologies struggle to effectively intercept and collect these high-temperature sparks.
A baffle plate is installed at the flue inlet, which is combined with a flow guide component and a dust collection component. The baffle plate has holes to intercept large particles. The flow guide component directs the sparking particles to the dust collection component, which collects the sparking particles and includes a removable dust collection box for easy cleaning.
It improves the interception efficiency of spark particles, reduces the temperature of the inner wall of the flue, reduces flue damage, extends the maintenance cycle, and reduces fire hazards.
Smart Images
Figure CN224321186U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of fume hoods, and in particular to a fume hood flue protection structure. Background Technology
[0002] Fume hoods are commonly used equipment in laboratories to exhaust harmful gases and fumes generated during experiments. In traditional fume hood usage scenarios, conventional methods for handling experimental fumes and harmful gases are relatively limited. One common approach is to simply rely on the exhaust system above the fume hood to directly draw the gases and fumes into the ductwork for discharge. This method is simple and direct, primarily relying on airflow to expel pollutants outdoors.
[0003] However, in plastic combustion experiments, the combustion rate is mainly determined by the burning behavior of the plastic. When the plastic particles being burned are small, the resulting smoke often carries high-temperature sparks. As the exhaust fan above the fume hood removes these sparks, they are drawn away and flow into the flue. If they come into direct contact with the inner wall of the flue, it may cause the inner wall material to burn, deform, or even cause a fire hazard. Therefore, further improvements are needed. Utility Model Content
[0004] To address the above problems, this application provides a fume hood flue protection structure.
[0005] This application provides a fume hood flue protection structure, which adopts the following technical solution:
[0006] A fume hood flue protection structure includes a baffle plate, a flow guiding component, and a dust collection component. The baffle plate is disposed at the flue inlet and has a plurality of holes. The flow guiding component is disposed on the side of the baffle plate away from the flue inlet and is used to guide spark particles passing through the holes to the dust collection component. The dust collection component is disposed below the flow guiding component.
[0007] By adopting the above technical solution, a baffle plate with several holes is installed at the flue inlet, which can intercept some large-sized particles, allowing these large particles to fall back to the combustion area, reducing the number of large sparks entering the flue, or causing them to adhere to the baffle plate due to the influence of the exhaust device. The flow guiding component is set on the side of the baffle plate away from the flue inlet, which can guide the sparks passing through the holes of the baffle plate to the dust collection component, allowing the sparks to flow to the dust collection component in an orderly manner and preventing the sparks from scattering randomly. The dust collection component is set below the flow guiding component, which can effectively collect sparks, so that more sparks are collected instead of directly contacting the inner wall of the flue, thereby improving the spark interception efficiency and reducing the temperature of the inner wall of the flue. At the same time, since most of the sparks are collected, damage to the flue is reduced, and the maintenance cycle of the fume hood flue protection structure is extended.
[0008] Preferably, the flue includes a vertically arranged vertical section and a horizontally arranged horizontal section, the lower end of the vertical section is the flue inlet, and the baffle plate is arranged at the corner between the vertical section and the horizontal section, and the baffle plate is inclined.
[0009] By adopting the above technical solution, the baffle plate is set at the corner between the vertical and horizontal sections and is inclined, which can more effectively intercept the smoke and dust with sparks rising from the vertical section, improve the efficiency of spark particle interception, and reduce the temperature of the inner wall of the flue.
[0010] Preferably, the holes on the baffle plate are fish-scale holes, and the baffle plate has a flow-guiding flange at the edge of the fish-scale holes.
[0011] By adopting the above technical solution, the holes on the barrier plate are fish-scale holes and the edges are provided with flow-guiding flanges, which can further optimize the blocking and flow-guiding effects and improve the efficiency of Martian particle interception.
[0012] Preferably, the flow guiding component includes flow guiding plates, and a plurality of flow guiding plates are spaced apart along the length direction of the horizontal segment, with adjacent flow guiding plates arranged in an alternating pattern.
[0013] By adopting the above technical solution, several guide plates are arranged at intervals along the length of the horizontal section, and adjacent guide plates are staggered to form an S-shaped channel. This allows the remaining spark particles to collide with and decelerate the guide plates, thereby improving the spark particle interception efficiency and reducing the temperature of the inner wall of the flue.
[0014] Preferably, one end of the guide plate is connected to the inner wall of the flue, and the end of the guide plate away from the flue is inclined.
[0015] Preferably, the dust collection assembly includes a dust collection box and a first filter plate disposed on the side of the dust collection box away from the flow guiding assembly. The first filter plate is disposed perpendicular to the horizontal section. The diameter of the filter holes on the first filter plate is smaller than the size of the holes opened on the baffle plate. The upper end face of the dust collection box is open. The dust collection box is detachably connected to the flue.
[0016] By adopting the above technical solution, the first filter plate can further filter particles and collect small combustion dust particles of the appropriate size into the dust collection box with an opening on the upper end. At the same time, the dust collection box is detachable for easy cleaning. Overall, this improves the efficiency of intercepting spark particles, reduces the temperature of the flue inner wall, and extends the maintenance cycle.
[0017] Preferably, the dust collection assembly further includes a second filter plate disposed on the side of the dust collection box near the flow guiding assembly and a first guide plate disposed below the second filter plate. The second filter plate abuts against the lower end of the flow guiding plate and is inclined toward the dust collection box.
[0018] By adopting the above technical solution, the dust collection assembly adds a second filter plate near the flow guiding assembly and a first guide plate below it. The second filter plate abuts against the dust collection particles and tilts towards the dust collection box, which can better guide small-sized particles into the dust collection box, further improving the particle collection effect, reducing particles remaining in the flue, reducing the risk of the flue inner wall being burned and deformed, improving the efficiency of spark particle interception, reducing the temperature of the flue inner wall, and at the same time reducing the number of maintenance times and extending the maintenance cycle.
[0019] Preferably, the flow guiding component includes a flow guiding plate, which is a spiral flow guiding plate, and the axis of the spiral flow guiding plate is inclined downward toward the dust collection component.
[0020] By adopting the above technical solution, using a spiral guide plate with its axis tilted downwards towards the dust collection component, the particles passing through the baffle plate can be better guided to the dust collection component.
[0021] Preferably, the guide plate is a heat sink.
[0022] By adopting the above technical solution, the heat sink in the guide plate can further enhance the heat dissipation effect on the Martian particles, allowing the Martian particles to cool down faster.
[0023] In summary, this utility model has the following beneficial effects:
[0024] The holes in the baffle plate can intercept large-sized burning particles, and the flow guiding component slows down the collision of remaining spark particles and directs them to the dust collection component, which improves the efficiency of spark particle interception and reduces the temperature of the inner wall of the flue. The dust collection component can collect particles, and the dust collection box has a detachable drawer structure, which is easy to clean and extends the maintenance cycle. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;
[0026] Figure 2 This is a schematic diagram of the structure of the baffle plate in Embodiment 1 of this application;
[0027] Figure 3 yes Figure 1 A magnified view of part A in the middle;
[0028] Figure 4 This is a top view of Embodiment 1 of this application;
[0029] Figure 5 This is a schematic diagram of the detachable connection structure of the guide plate in Embodiment 1 of this application;
[0030] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this application;
[0031] Figure 7 This is a structural schematic diagram of Embodiment 3 of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Flue; 11. Vertical section; 12. Horizontal section; 13. Slot; 14. Fixing plate; 2. Baffle plate; 21. Hole; 22. Guide flange; 3. Guide assembly; 4. Dust collection assembly; 41. Dust collection box; 411. Opening; 412. Sloping surface; 42. First filter plate; 43. Second filter plate; 44. First guide plate; 45. Second guide plate; 5. Limiting component; 51. Limiting plate; 52. Limiting bolt. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.
[0034] This application discloses a fume hood flue protection structure.
[0035] Example 1:
[0036] A fume hood flue protection structure, referring to Figure 1 It is installed inside the flue 1. It should be noted that the flue 1 includes a vertical section 11 that is set vertically and a horizontal section 12 that is set horizontally. The lower end of the vertical section 11 is the inlet of the flue 1.
[0037] Reference Figure 1 , Figure 2 The protective structure specifically includes a baffle plate 2, a flow guiding component 3, and a dust collection component 4. The baffle plate 2 is located at the inlet of the flue 1, specifically at the corner between the vertical section 11 and the horizontal section 12, and is inclined. In this embodiment, the baffle plate 2 is a metal plate, specifically a metal plate with heat dissipation properties, such as an aluminum plate, a copper-aluminum composite plate, or a steel plate, depending on the requirements. The baffle plate 2 has several holes 21, which are fish-scale shaped holes. A flow guiding flange 22 is located at the edge of the fish-scale holes on the baffle plate 2. The flow guiding flange 22 can guide the flow direction of the spark particles, allowing them to pass through the holes 21 more orderly or be blocked and fall back.
[0038] It should be noted that the diameter of the holes 21 can be 3-5mm, depending on the requirements. In addition to fish scale holes, other shapes of holes 21, such as diamond holes, can also be used to replace them, as long as they can achieve the function of intercepting larger particles.
[0039] The flow guiding component 3 is located on the side of the baffle plate 2 away from the inlet of the flue 1. The flow guiding component 3 is used to guide the spark particles passing through the hole 21 to the dust collection component 4, which is located below the flow guiding component 3. The flow guiding component 3 includes a flow guiding plate. In this embodiment, several flow guiding plates are spaced apart along the length of the horizontal section 12, and adjacent flow guiding plates are arranged in an alternating manner. The end of the flow guiding plate away from the flue 1 is inclined, and its inclination direction can be the same as that of the baffle plate 2. The flow guiding plate is a heat sink and can be made of a metal plate with heat dissipation effect. It should be noted that the upper end of one part of the guide plate is fixedly connected to the inner top wall of flue 1, and the lower end of this part of the guide plate is left with a passage gap between it and the inner bottom wall of flue 1. The lower end of the other part of the guide plate is fixedly connected to the inner bottom wall of flue 1, and the upper end of this part of the guide plate is left with a passage gap between it and the inner top wall of flue 1. Several guide plates form an S-shaped channel, which can decelerate the remaining spark particles when they collide with the guide plates, improve the spark particle interception efficiency, and reduce the temperature of the inner wall of flue 1.
[0040] Reference Figure 3 , Figure 4 The dust collection assembly 4 includes a dust collection box 41 and a first filter plate 42 disposed on the side of the dust collection box 41 away from the flow guiding assembly 3. The upper end face of the dust collection box 41 is provided with an opening 411. The dust collection box 41 is detachably connected to the flue 1. Specifically, the dust collection box 41 is a detachable drawer structure. The bottom wall of the flue 1 is provided with a slot 13 for the dust collection box 41 to slide and be inserted, which facilitates the installation and removal of the dust collection box 41. The flue 1 is also provided with a limiting member 5 for restricting the movement of the dust collection box 41. The limiting member 5 includes a limiting plate 51 disposed on the lower surface of the dust collection box 41 and a limiting bolt 52 passing through the limiting plate 51. Several limiting plates 51 are provided. The limiting bolt 52 is threadedly connected to the outer bottom wall of the flue 1, thereby allowing the dust collection box 41 to be installed on the flue 1.
[0041] It should be noted that, due to the presence of the guide plate, some smoke and dust may fall into the flue 1 due to the influence of the guide plate. To address this, the guide plate, which can be connected to the bottom wall of the flue 1, is detachable from the flue 1. Specifically, the bottom wall of the flue 1 is divided into a separate fixing plate 14, which is fixed to the guide plate below. The fixing plate 14 is fixed to the dust collection box 41, and a limit plate 51 is also fixedly connected to the fixing plate 14. Figure 5 As shown.
[0042] In this embodiment, the first filter plate 42 is arranged perpendicular to the horizontal section 12 and is fixedly connected to the upper surface of the dust collection box 41. The diameter of the filter holes on the first filter plate 42 is smaller than the size of the holes 21 opened on the baffle plate 2, which can further filter the particles and prevent smaller particles from passing through.
[0043] The implementation principle of the fume hood flue protection structure in this application embodiment is as follows: The fume hood flue 1 protection structure uses a baffle plate 2 to initially intercept larger spark particles, causing most of the large particles to fall back to the combustion area, reducing the amount of particles entering the flue 1. Then, the particles that pass through the baffle plate 2 enter the guide assembly 3, collide with the guide plate to slow down, and move towards the dust collection assembly 4 under the guidance of the guide plate. The first filter plate 42 performs secondary filtration on the particles, and finally the particles fall into the dust collection box 41. This structure effectively improves the interception efficiency of spark particles, reduces the direct contact of a large number of high-temperature spark particles with the inner wall of the flue 1, thereby reducing the temperature of the inner wall of the flue 1, reducing the occurrence of ablation, deformation, and fire hazards on the inner wall of the flue 1.
[0044] Example 2:
[0045] Reference Figure 6 The difference from Embodiment 1 is that the dust collection assembly 4 further includes a second filter plate 43 disposed on the side of the dust collection box 41 near the flow guiding assembly 3, a first guide plate 44 disposed below the second filter plate 43, and a second guide plate 45 connected to the first guide plate 44. The second filter plate 43 abuts against the lower end of the flow guiding plate that was originally fixedly connected to the bottom wall of the flue 1. The second filter plate 43 is inclined towards the dust collection box 41. The diameter of the filter holes on the second filter plate 43 can be larger than the diameter of the holes 21 of the baffle plate 2, so that dust that falls before reaching the dust collection box 41 can pass through the second filter plate 43 and fall onto the first guide plate 44 below. In this embodiment, the first guide plate 44 is inclined downward towards the dust collection box 41 to guide the dust into the dust collection box 41.
[0046] The second guide plate 45 is S-shaped and inclined. The lower end of the second guide plate 45 is connected to the bottom wall of the flue 1, and the upper end of the second guide plate 45 is connected to the second filter plate 43 and the second guide plate 45. The spark particles that pass through the baffle plate 2 can flow along the second guide plate 45 to the guide plate.
[0047] It should be noted that the second filter plate 43, the first guide plate 44, and the second guide plate 45 can be fixedly connected to the guide plate in Embodiment 1 and the fixed plate 14 for detachable connection, which can be set according to the specific requirements.
[0048] Example 3:
[0049] Reference Figure 7 The difference from Embodiment 1 is that in this embodiment, the guide plate is a spiral guide plate. The axis of the spiral guide plate is inclined downwards towards the dust collection assembly 4. The spiral guide plate allows the spark particles to flow in the spiral channel, increasing the movement path of the particles and the chance of collision with the guide plate, further improving the deceleration effect and guiding efficiency of the particles. The spiral guide plate can be made of metal material in a continuous spiral shape, or it can be made of multiple arc-shaped plates spliced together to form a spiral shape.
[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A fume hood flue protection structure, installed inside the flue, characterized in that: The assembly includes a baffle plate (2), a flow guide component (3), and a dust collection component (4). The baffle plate (2) is located at the inlet of the flue (1) and has several holes (21). The flow guide component (3) is located on the side of the baffle plate (2) away from the inlet of the flue (1). The flow guide component (3) is used to guide spark particles passing through the holes (21) to the dust collection component (4). The dust collection component (4) is located below the flow guide component (3).
2. The fume hood flue protection structure according to claim 1, characterized in that: The flue (1) includes a vertical section (11) and a horizontal section (12) arranged in a vertical direction. The lower end of the vertical section (11) is the inlet of the flue (1). The baffle plate (2) is arranged at the corner between the vertical section (11) and the horizontal section (12). The baffle plate (2) is arranged at an angle.
3. The fume hood flue protection structure according to claim 2, characterized in that: The holes (21) on the baffle plate (2) are fish scale holes, and the baffle plate (2) has a flow guide flange (22) at the edge of the fish scale holes.
4. The fume hood flue protection structure according to claim 2, characterized in that: The flow guiding component (3) includes flow guiding plates, and several flow guiding plates are spaced apart along the length direction of the horizontal segment (12), with adjacent flow guiding plates arranged in an alternating pattern.
5. The fume hood flue protection structure according to claim 4, characterized in that: One end of the guide plate is connected to the inner wall of the flue (1), and the end of the guide plate away from the flue (1) is inclined.
6. The fume hood flue protection structure according to claim 5, characterized in that: The dust collection assembly (4) includes a dust collection box (41) and a first filter plate (42) disposed on the side of the dust collection box (41) away from the flow guiding assembly (3). The first filter plate (42) is disposed perpendicular to the horizontal section (12). The diameter of the filter holes on the first filter plate (42) is smaller than the size of the holes (21) opened on the baffle plate (2). The upper end face of the dust collection box (41) is open (411). The dust collection box (41) is detachably connected to the flue (1).
7. The fume hood flue protection structure according to claim 6, characterized in that: The bottom wall of the flue (1) is provided with a slot (13) for the flue (1) to slide and be inserted, and the flue (1) is provided with a limiting member (5) for restricting the movement of the dust collection box (41).
8. The fume hood flue protection structure according to claim 5, characterized in that: The dust collection assembly (4) further includes a second filter plate (43) disposed on the side of the dust collection box (41) near the flow guide assembly (3) and a first guide plate (44) disposed below the second filter plate (43). The second filter plate (43) abuts against the lower end of the flow guide plate and is inclined towards the dust collection box (41).
9. A fume hood flue protection structure according to claim 1, characterized in that: The flow guiding component (3) includes a flow guiding plate, which is a spiral flow guiding plate, and the axis of the spiral flow guiding plate is inclined downward toward the dust collection component (4).
10. A fume hood flue protection structure according to any one of claims 4-9, characterized in that: The guide plate is a heat sink.