Anti-backflow structure of flue gas collecting hood

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a smoke collecting hood anti-backflow structure which comprises a shell and a pipeline, the upper end and the lower end of the shell are fixedly communicated with the pipeline, the smoke collecting hood anti-backflow structure is arranged in the middle of the shell, and the outer wall of the shell is fixedly connected with a box body. The lower end of the outer wall of the shell is fixedly connected with a fan through a support, and an air outlet of the fan fixedly communicates with the straight pipe. According to the anti-backflow structure of the flue gas collecting hood, through the cooperation of the anti-backflow structure of the flue gas collecting hood and the fan, flue gas to be subjected to backflow is pushed and finally drives a plurality of plate bodies to move relatively by utilizing the electric telescopic rod, so that gaps among the plate bodies are reduced, and the pressure of gas sprayed into the shell by a straight pipe and the pressure of gas sucked by an external air purifier are effectively improved; therefore, the smoke in a long distance can be sucked and purified, the overall practicability is effectively improved, meanwhile, the fan only needs to convey air at the same power, and energy consumption is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a flue gas collection hood anti-backflow structure. Background Technology

[0002] A gas collection hood is a device for collecting pollution sources in a flue gas purification system. It can guide dust and gaseous pollutants into the purification system while preventing them from spreading into the production workshop and the atmosphere, causing pollution. Its performance has a direct impact on the technical and economic indicators of the purification system. Due to the different structures of pollution source equipment and production operation processes, there are various forms of gas collection hoods. During the use of gas collection hoods, some waste may flow back. Therefore, a flue gas collection hood anti-backflow structure is provided.

[0003] For example, the backflow prevention structure of a flue gas collection hood with announcement number "CN221657463U" solves the problem of some flue gas backflow when the air inlet of the flue gas collection hood is large and the air pressure difference between the treatment equipment and the environment is large, by setting up a vent pipe and a blower. Furthermore, the collection hood usually only guides the flue gas, and the high-temperature flue gas will increase the burden on the treatment equipment and shorten its service life. However, the above method, which uses a blower to draw in outside air and compress and push the flue gas into the collection hood, is only suitable for small spaces. When in a large indoor space, a large amount of air needs to be drawn in and compressed into the collection hood, requiring the blower to operate at high power, thus increasing energy consumption. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when in a large indoor space, a large amount of air needs to be drawn in to compress the air into the gas collection hood, which requires the fan to work at high power and thus increases energy consumption. Therefore, this invention proposes a backflow prevention structure for the flue gas collection hood.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flue gas collection hood anti-backflow structure is designed, including an outer shell and a pipe. The upper and lower ends of the outer shell are fixedly connected to the pipe. The middle part of the outer shell is provided with the anti-backflow structure. A box is fixedly connected to the outer wall of the outer shell. A fan is fixedly connected to the lower end of the outer wall of the outer shell through a bracket. The air outlet of the fan is fixedly connected to a straight pipe. The outer wall of the straight pipe is fixedly connected to the outer shell. Multiple through holes are machined at the upper end of the straight pipe.

[0007] Preferably, the anti-backflow structure of the gas collecting hood includes an electric telescopic rod, a horizontal plate is fixedly connected to the output end of the electric telescopic rod, racks are fixedly connected to both sides of the horizontal plate, the inner wall of the racks is slidably connected to a slide rod, the outer wall of the racks is meshed with multiple gears, a plate is fixedly connected to the rotating part of the gears, and the rotating shaft of the plate is movably connected to the outer shell through a sealed bearing.

[0008] Preferably, the bottom of the electric telescopic rod is fixedly connected to the outer shell, and the outer wall of the cross plate is slidably connected to the box body.

[0009] Preferably, the plurality of gear rotating shafts are rotatably connected to the housing via bearings, and the two ends of the slide rod are fixedly connected to the housing.

[0010] Preferably, ear plates are fixedly connected to both sides of the outer wall of the outer shell, and threaded holes are machined at the upper and lower ends of the ear plates.

[0011] The present invention proposes a flue gas collection hood anti-backflow structure, the beneficial effects of which are as follows: Through the cooperation of the anti-backflow structure and the fan, the fan, when activated, inflates the straight pipe and sprays it out from its upper opening. The sprayed air pushes the air inside the outer shell to flow upwards between multiple plates. These plates are obliquely arranged and opposite to each other. When some flue gas backflows, it enters between these plates and, through the air blown out of the straight pipe, propels the smoke and dust further towards the duct and the external air purifier. The electric telescopic rod activates, causing the horizontal plate to slide downwards within the housing. This, in turn, causes two racks to slide downwards on the outer wall of the sliding rod, which in turn supports the racks. The rack slides downwards, driving multiple gears to move within the housing via bearings. These gears, in turn, drive the plates to move relative to each other within the outer casing via sealed bearings. A fan delivers air into the straight pipe and sprays it between the plates, pushing the flue gas that is about to flow back. An electric telescopic rod then drives the plates to move relative to each other, reducing the gaps between them. This effectively increases the gas pressure sprayed into the outer casing from the straight pipe and the air pressure drawn in by the external air purifier, thereby increasing the flow velocity of the flue gas. This allows for the intake and purification of flue gas from a greater distance, effectively improving overall practicality. At the same time, the fan only needs to deliver air at the same power, effectively reducing energy consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 A front sectional view;

[0014] Figure 3 for Figure 2 Left sectional view;

[0015] Figure 4 for Figure 2 Rear sectional view;

[0016] Figure 5 for Figure 2 A magnified view of A in the middle.

[0017] In the diagram: 1. Anti-backflow structure of the gas collection hood; 101. Electric telescopic rod; 102. Horizontal plate; 103. Gear; 104. Slide rod; 105. Gear; 106. Plate; 2. Straight pipe; 3. Box; 4. Ear plate; 5. Pipe; 6. Fan; 7. Outer shell. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] See attached document Figure 1-5 In this embodiment, a flue gas collection hood anti-backflow structure includes an outer shell 7 and a pipe 5. The upper and lower ends of the outer shell 7 are fixedly connected to the pipe 5. The lower end of the pipe 5 is fixedly connected to an external gas collection hood, and the upper end is connected to an external flue gas filtration device. A gas collection hood anti-backflow structure 1 is provided in the middle of the outer shell 7, and a box 3 is fixedly connected to the outer wall of the outer shell 7.

[0020] A fan 6 is fixedly connected to the lower end of the outer wall of the outer shell 7 via a bracket. The fan 6 can meet the working requirements according to actual needs. The air outlet of the fan 6 is fixedly connected to the straight pipe 2. The outer wall of the straight pipe 2 is fixedly connected to the outer shell 7. Multiple through holes are machined at the upper end of the straight pipe 2. The bottom of the electric telescopic rod 101 is fixedly connected to the outer shell 7. The outer wall of the horizontal plate 102 is slidably connected to the box 3.

[0021] The horizontal plate 102 can slide inside the housing 3. The rotating shafts of multiple gears 105 are rotatably connected to the housing 3 through bearings. The multiple gears 105 can rotate inside the housing 3 through bearings. The two ends of the slide rod 104 are fixedly connected to the housing 3. The outer walls of the outer shell 7 are fixedly connected to the ear plates 4. The upper and lower ends of the ear plates 4 are machined with threaded holes. The ear plates are fixed to the wall using external bolts, which facilitates the overall installation of the structure.

[0022] See attached document Figure 1-5 The anti-backflow structure 1 of the gas collection hood includes an electric telescopic rod 101. The electric telescopic rod 101 can meet the actual needs of the work. A horizontal plate 102 is fixedly connected to the output end of the electric telescopic rod 101. A rack 103 is fixedly connected to both sides of the horizontal plate 102. The inner wall of the rack 103 is slidably connected to the slide rod 104. The rack 103 can slide on the outer wall of the slide rod 104.

[0023] The slide bar 104 can support the rack 103. The outer wall of the rack 103 is meshed with multiple gears 105. The sliding of the rack 103 can drive the multiple gears 105 to move. The rotating part of the gear 105 is fixedly connected to the plate 106. The rotating shaft of the plate 106 is movably connected to the outer shell 7 through a sealed bearing. The movement of the gear 105 can drive the plate 106 to move within the outer shell 7 through the sealed bearing.

[0024] Working principle:

[0025] Flue gas collection hood backflow prevention operation:

[0026] When indoor smoke collection and purification is required, the two lugs 4 are fixed in the appropriate positions with external bolts, and the air collection hood at the lower end of the pipe 5 is aligned with the smoke. The upper end of the pipe 5 is fixedly connected to the external air purifier. Then, the external air purifier is started, and the smoke is drawn through the pipe 5, the outer casing 7, and the air collection hood. At the same time, the external power supply of the fan 6 is connected, and the fan 6 starts to inflate the straight pipe 2 and spray it out from its upper opening. The sprayed air pushes the air inside the outer casing 7 to flow between the multiple plates 106, thereby driving the smoke to flow synchronously. The multiple plates 106 are obliquely and oppositely arranged. When some smoke flows back, it will enter between the multiple plates 106 and be blown out by the straight pipe 2 to continue to transport the smoke towards the pipe 5 and the external air purifier. At the same time, the external air purifier also draws in the smoke, further... The flue gas is diverted to prevent backflow. Simultaneously, the external power supply to the electric telescopic rod 101 is connected. The electric telescopic rod 101 activates, causing the horizontal plate 102 to slide downwards within the housing 3. This, in turn, causes two racks 103 to slide downwards on the outer wall of the slide rod 104. The slide rod 104 supports the racks 103. The downward sliding of the racks 103 drives multiple gears 105 to move within the housing 3 via bearings. These gears, in turn, cause plates 106 to move relative to each other within the outer casing 7 via sealed bearings. This relative movement of the plates 106 reduces the gaps between them, thereby increasing the gas pressure injected into the outer casing 7 by the straight pipe 2 and the suction pressure of the external air purifier. This increases the flow velocity of the flue gas, enabling the suction and purification of flue gas from a greater distance, effectively improving overall practicality.

[0027] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A flue gas collection hood anti-backflow structure, comprising an outer shell (7) and a pipe (5), wherein the upper and lower ends of the outer shell (7) are fixedly connected to the pipe (5), characterized in that: The outer shell (7) is provided with a gas collection hood anti-backflow structure (1) in the middle. The outer wall of the outer shell (7) is fixedly connected to a box (3). The lower end of the outer wall of the outer shell (7) is fixedly connected to a fan (6) through a bracket. The air outlet of the fan (6) is fixedly connected to a straight pipe (2). The outer wall of the straight pipe (2) is fixedly connected to the outer shell (7). The upper end of the straight pipe (2) is machined with multiple through holes.

2. The anti-backflow structure of a flue gas collection hood according to claim 1, characterized in that: The anti-backflow structure (1) of the gas collection hood includes an electric telescopic rod (101), the output end of which is fixedly connected to a horizontal plate (102), and the two sides of the horizontal plate (102) are fixedly connected to a rack (103). The inner wall of the rack (103) is slidably connected to a slide rod (104), and the outer wall of the rack (103) is meshed with multiple gears (105). The rotating part of the gear (105) is fixedly connected to a plate (106), and the rotating shaft of the plate (106) is movably connected to the outer shell (7) through a sealed bearing.

3. The anti-backflow structure of a flue gas collection hood according to claim 2, characterized in that: The bottom of the electric telescopic rod (101) is fixedly connected to the outer shell (7), and the outer wall of the horizontal plate (102) is slidably connected to the box body (3).

4. The anti-backflow structure of a flue gas collection hood according to claim 2, characterized in that: The rotating shafts of the multiple gears (105) are rotatably connected to the housing (3) via bearings, and the two ends of the slide rod (104) are fixedly connected to the housing (3).

5. The anti-backflow structure for a flue gas collection hood according to claim 1, characterized in that: The outer wall of the outer shell (7) is fixedly connected to the two sides of the ear plate (4), and the upper and lower ends of the ear plate (4) are machined with threaded holes.

Images