A high-efficiency smoke exhaust well

Abstract

This utility model provides a high-efficiency smoke exhaust well, relating to the technical field of smoke exhaust wells. It includes: a cylindrical structure with openings at both ends, comprising a swirling section, a contraction section, and a smoke exhaust section, wherein the swirling section, the contraction section, and the smoke exhaust section are sequentially connected axially; a swirling device disposed at the lower end of the swirling section and communicating with it, the swirling device comprising an induced draft fan and a connecting ring, the induced draft fan being connected to the swirling section through the connecting ring, and the air delivery angle of the induced draft fan being tangential to the inner circumference of the swirling section. The beneficial effects of this utility model are: by setting a swirling device at the lower end of the separation section, wherein the induced draft fan delivers air tangentially into the separation section, causing the gas to rise in a spiral trajectory within the separation section, this swirling method effectively enhances the rotational capacity of the flue gas, increases its kinetic energy, and facilitates smoother entry of the flue gas into the subsequent smoke exhaust process, greatly improving smoke exhaust efficiency.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust well technology, and in particular to a high-efficiency smoke exhaust well. Background Technology

[0002] Smoke exhaust shafts, as key facilities for ensuring indoor air quality and fire safety, currently rely primarily on natural smoke extraction. They utilize thermal pressure and wind pressure to expel smoke to the outside through the shaft. Thermal pressure arises from the density difference between indoor and outdoor air, while wind pressure comes from the pressure difference created by outdoor wind acting on the building. Natural smoke extraction offers advantages such as requiring no external force, simple maintenance, and low operating costs, and is widely used in many buildings.

[0003] However, natural smoke extraction methods suffer from significant inefficiencies in practical applications. Firstly, their efficiency is greatly affected by the airflow patterns inside and outside the building. Secondly, thermal and wind pressures are unstable; when external weather conditions change, such as in calm or lightly windy weather, or when the temperature difference between indoors and outdoors is small, the effects of thermal and wind pressures weaken, significantly reducing the smoke extraction speed of the exhaust shaft, and even causing smoke stagnation. Furthermore, the structural design of exhaust shafts, such as their shape and dimensions, is often not optimized, resulting in high resistance to smoke flow within the shaft, hindering efficient extraction and failing to meet the high requirements of modern buildings for fire safety and ventilation quality. Utility Model Content

[0004] In view of this, the embodiments of this utility model provide a high-efficiency smoke exhaust well to solve the technical problem of low natural smoke exhaust efficiency of existing smoke exhaust wells.

[0005] An embodiment of this utility model provides a high-efficiency smoke exhaust well, comprising: A cylindrical structure with openings at both the top and bottom, comprising a swirl section, a contraction section, and a smoke exhaust section connected sequentially from bottom to top; A swirling device is disposed at the lower end of the swirling section and communicates with the swirling section. The swirling device includes an induced draft fan and a connecting ring. The induced draft fan is connected to the swirling section through the connecting ring, and the air delivery angle of the induced draft fan is tangent to the inner circumference of the swirling section, so that the gas in the swirling section rises along the inner wall of the swirling section in a spiral trajectory. And an active flow guiding structure, which is connected to the swirling section and the contraction section, includes a transition ring and a plurality of guide plates. The plurality of guide plates are arranged at equal intervals around the transition ring and can rotate relative to the transition ring, so that the gas rotates when it rises and passes through the flow guiding structure.

[0006] Furthermore, the contraction section is generally truncated cone-shaped, with a wide opening at one end and a narrow opening at the other end. The narrow opening of the contraction section is connected to the exhaust section, and the wide opening of the contraction section is connected to the swirl section.

[0007] Furthermore, the connecting ring is connected to the lower end of the swirl section, and an air inlet pipe is connected to the outer wall of the connecting ring. One end of the air inlet pipe is connected to the inner wall of the connecting ring, and the other end is connected to the air outlet of the induced draft fan. The air inlet pipe is located tangentially to the connecting ring.

[0008] Furthermore, an arc-shaped opening is provided on one side of the air inlet pipe that communicates with the connecting ring, and the arc-shaped surface of the arc-shaped opening fits the inner diameter of the connecting ring.

[0009] Furthermore, a guide groove is formed on the inner wall of the swirl section, the guide groove is spiral in shape and the direction of the spiral of the guide groove is connected to the arc opening.

[0010] Furthermore, the transition ring has an extension ring extending toward its center, on which a connecting ring is rotatably mounted, and a plurality of the guide plates are evenly distributed on the connecting ring, and the outer wall of the connecting ring is provided with external teeth; The transition ring has an extension portion connected to its exterior. A drive wheel is rotatably mounted on the extension portion. The drive wheel meshes with the external teeth. A motor is provided on the inner wall of the transition ring. The output end of the motor is connected to the drive wheel.

[0011] Furthermore, the guide plate includes a connecting part, a first fan part, and a second fan part. The connecting part is connected to the connecting ring, the first fan part is connected to the connecting part, and the second fan part is connected above the first fan part. The arc surfaces of the first fan part and the second fan part are flush with each other in the vertical direction.

[0012] Furthermore, one side of the arc surface of the first fan and the second fan is stepped, so that the guide plate can generate two continuous flow in the vertical direction.

[0013] Furthermore, the transition ring and the contraction section, as well as the contraction section and the exhaust section, are all connected by flange seals.

[0014] Furthermore, the top of the exhaust section is connected to a glass cover, and the outer wall of the exhaust section is provided with multiple grids to allow the smoke to be discharged from the side of the exhaust section and reduce rainwater interference.

[0015] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The high-efficiency flue gas well of this utility model, by setting a swirling device at the lower end of the separation section, wherein the induced draft fan delivers air into the separation section in a tangential direction, causing the gas to rise in a spiral trajectory within the separation section. This swirling method can effectively enhance the rotational ability of the flue gas, increase the kinetic energy of the flue gas, and promote the flue gas to enter the subsequent flue gas exhaust process more smoothly, greatly improving the flue gas exhaust efficiency. Secondly, the setting of the active flow guiding structure further strengthens this advantage. Its guide plate is rotatable and can perform secondary flow guiding on the rising gas to ensure... Before entering the contraction section, the gas exhibits a stable swirling state, optimizing airflow organization, avoiding eddies and backflow phenomena, minimizing energy loss, and further improving the smoothness and efficiency of smoke exhaust. Furthermore, the frustum-shaped design of the contraction section causes the smoke to accelerate as the channel gradually narrows, providing strong power support for smoke exhaust and accelerating its final discharge. This achieves highly efficient smoke emission, meeting the requirements of modern buildings for efficient and reliable smoke exhaust systems while also enhancing the fire safety performance of buildings. It has practical value and broad application prospects. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the overall structure of a high-efficiency smoke exhaust well according to this utility model; Figure 2 This is a longitudinal cross-sectional view of the swirl section of a high-efficiency smoke exhaust well according to this utility model; Figure 3 This is a longitudinal cross-sectional view of the contraction section of a high-efficiency smoke exhaust well according to this utility model; Figure 4 This is a schematic diagram of the transition ring structure of a high-efficiency smoke exhaust well according to this utility model.

[0017] In the diagram: 1. Swirl section; 2. Contraction section; 3. Smoke exhaust section; 4. Connecting ring; 5. Air inlet pipe; 6. Exhaust fan; 7. Arc opening; 8. Guide channel; 9. Flange; 10. Grid; 11. Glass cover; 12. Transition ring; 121. Extension ring; 13. Connecting ring; 14. External tooth; 15. Drive wheel; 16. Motor; 17. Guide plate; 171. Connecting part; 172. First fan section; 173. Second fan section. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0019] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0020] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0022] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0023] It should be further noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please refer to Figure 1 The present invention provides a high-efficiency smoke exhaust well, which includes a cylindrical structure with openings at both the top and bottom. The cylindrical structure is composed of a swirl section 1, a contraction section 2 and a smoke exhaust section 3 connected sequentially in the axial direction.

[0025] The swirl section 1 is used to create gas swirl during the rising of the flue gas, thereby accelerating the exhaust efficiency of the flue gas; the contraction section 2 is used to increase the rising speed of the flue gas; and the exhaust section 3 is used for the final exhaust of the flue gas.

[0026] In this embodiment, the swirling device is located at the lower end of the swirling section 1 and is connected to the swirling section 1. The swirling device includes an induced draft fan 6 and a connecting ring 4. The induced draft fan 6 is connected to the swirling section 1 through the connecting ring 4, and the air delivery angle of the induced draft fan 6 is tangent to the inner circumference of the swirling section 1. With this configuration, when the induced draft fan 6 is started, the gas is introduced into the swirling section 1 and will rise along the inner wall of the swirling section 1 in a spiral trajectory to form a swirling flow.

[0027] In this embodiment, the connecting ring 4 is connected to the lower end of the swirl section 1, and the outer wall of the connecting ring 4 is connected to the air inlet pipe 5. One end of the air inlet pipe 5 is connected to the inner wall of the connecting ring 4, and the other end is connected to the air outlet of the induced draft fan 6. The air inlet pipe 5 is located in the tangential direction of the connecting ring 4.

[0028] This configuration allows the air blown out by the induced draft fan 6 to enter the connecting ring 4 tangentially, thereby driving the gas in the swirl section 1 to form a swirl.

[0029] To improve the uniformity and smoothness of air intake, an arc-shaped opening 7 is provided on the side of the air intake pipe 5 that is connected to the connecting ring 4, and the arc-shaped surface of the arc-shaped opening 7 fits the inner diameter of the connecting ring 4.

[0030] The design of the arc 7 allows the air blown out by the air inlet pipe 5 to be more evenly distributed within the connecting ring 4, avoiding excessively high or low local wind speeds that could affect the formation of vortices.

[0031] Please refer to Figure 2 In this embodiment, a guide groove 8 is provided on the inner wall of the swirl section 1. The guide groove 8 is spiral in shape and the direction of the spiral of the guide groove 8 is connected to the arc opening 7.

[0032] The guide groove 8 can further guide the gas entering the swirl section 1, making it rise more smoothly along the inner wall of the swirl section 1 in a spiral trajectory, thus enhancing the stability of the swirl.

[0033] Furthermore, the contraction section 2 is generally shaped like a frustum, with a wide opening at one end and a narrow opening at the other. The narrow opening of the contraction section 2 is connected to the exhaust section 3, and the wide opening of the contraction section 2 is connected to the swirl section 1.

[0034] This design allows the flue gas to enter the contraction section 2, where the channel gradually narrows and the flow velocity increases further, thereby enhancing the power of flue gas exhaust and accelerating the discharge of flue gas.

[0035] Please refer to Figure 4 In this embodiment, the active flow guiding structure is connected to the swirl section 1 and the contraction section 2, and includes a transition ring 12 and multiple flow guide plates 17.

[0036] Multiple guide plates 17 are arranged at equal intervals around the transition ring 12, and the multiple guide plates 17 can rotate relative to the transition ring 12, so that the gas rotates when it rises and passes through the guide structure, further enhancing the swirling effect, ensuring that the flue gas has good swirling characteristics before entering the contraction section 2, and improving the flue gas exhaust efficiency of the entire exhaust well.

[0037] Specifically, the transition ring 12 has an extension ring 121 extending toward its center, on which a connecting ring 13 is rotatably mounted. Multiple guide plates 17 are evenly distributed on the connecting ring 13, and external teeth 14 are provided on the outer wall of the connecting ring 13. In addition, the outer wall of the transition ring 12 has an extension portion, which is a cylindrical space with a diameter smaller than that of the transition ring 12. Its inner cavity is connected to the transition ring 12. A drive wheel 15 is rotatably mounted on the extension portion. The drive wheel 15 meshes with the external teeth 14. A motor 16 is provided on the inner wall of the transition ring 12, and the output end of the motor 16 is connected to the drive wheel 15.

[0038] When the motor 16 starts, it drives the drive wheel 15 to rotate. The drive wheel 15 meshes with the external tooth 14, thereby driving the connecting ring 13 to rotate, which in turn causes the guide plate 17 to rotate, realizing the active guidance of the gas. This allows the gas to be driven to rotate again during the upward process, further optimizing the swirling effect and improving the smoke exhaust efficiency.

[0039] Specifically, the deflector 17 includes a connecting part 171, a first fan part 172 and a second fan part 173. The connecting part 171 is connected to the connecting ring 13, the first fan part 172 is connected to the connecting part 171, and the second fan part 173 is connected above the first fan part 172. The arc surfaces of one side of the first fan part 172 and the second fan part 173 are flush in the vertical direction.

[0040] This design allows the guide plate 17 to effectively and continuously guide the gas at different heights when rotating, ensuring that the gas on the entire cross-section can form a good swirling flow.

[0041] Furthermore, one side of the arc surface of the first fan section 172 and the second fan section 173 is stepped, so that the guide plate 17 can generate two guiding effects in the vertical direction.

[0042] The stepped design increases the contact area between the guide plate 17 and the gas, improving the flow guiding effect, and also enhances the structural strength of the guide plate 17.

[0043] To facilitate installation and disassembly while ensuring a tight seal, the transition ring 12 and the contraction section 2, as well as the contraction section 2 and the exhaust section 3, are sealed together by flanges 9.

[0044] In an optional embodiment, a glass cover 11 is connected to the top of the smoke exhaust section 3. The glass cover 11 can prevent external debris from entering the smoke exhaust well, and at the same time facilitates the observation of the smoke exhaust situation.

[0045] Multiple grids 10 are provided on the outer wall of the smoke exhaust section 3 to allow the smoke to be discharged from the side of the smoke exhaust section 3, reduce the impact of rainy weather on the smoke exhaust, prevent rainwater from flowing back into the smoke exhaust well, and improve the applicability and reliability of the smoke exhaust well.

[0046] In practical applications, flue gas rises from below the connecting ring 4 along the swirl section 1. The induced draft fan 6 starts, drawing outside air into the connecting ring 4 through the inlet pipe 5. Since the inlet pipe 5 is positioned tangentially to the connecting ring 4, the air enters the connecting ring 4 tangentially and then flows along the inner circumference of the swirl section 1. Within the swirl section 1, it passes through the guide groove 8, which further guides the airflow to rotate and rise along the inner wall of the swirl section 1, enhancing the swirling effect. The rising of the flue gas through the swirling gas improves exhaust efficiency. When the airflow reaches the active guide structure, the electric... The machine 16 drives the drive wheel 15 to rotate. The drive wheel 15, through meshing with the external tooth 14, drives the connecting ring 13 to rotate, which in turn causes the guide plate 17 to rotate. When the guide plate 17 rotates, it guides the airflow again, making the airflow form a more stable vortex before entering the contraction section 2. After the airflow enters the contraction section 2, since the contraction section 2 is truncated cone-shaped, the channel gradually narrows and the airflow speed further increases. Finally, it is discharged through the smoke exhaust section 3. During the discharge process, the smoke is discharged laterally through the grid 10 to reduce the interference of rainy weather and ensure the smooth discharge.

[0047] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0048] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency smoke extraction well, characterized in that, include: The cylindrical structure with openings at both the top and bottom includes a swirl section (1), a contraction section (2), and a smoke exhaust section (3) connected from bottom to top. A swirling device is provided at the lower end of the swirling section (1) and communicates with the swirling section (1). The swirling device includes an induced draft fan (6) and a connecting ring (4). The induced draft fan (6) is connected to the swirling section (1) through the connecting ring (4), and the air delivery angle of the induced draft fan (6) is tangent to the inner circumference of the swirling section (1) so that the gas in the swirling section (1) rises along the inner wall of the swirling section (1) in a spiral trajectory. And an active flow guiding structure, which is connected to the swirling section (1) and the contraction section (2), includes a transition ring (12) and a plurality of flow guides (17), the plurality of flow guides (17) are arranged at equal intervals in the circumferential direction of the transition ring (12), and the plurality of flow guides (17) can rotate relative to the transition ring (12), so that the gas rotates when it rises and passes through the flow guiding structure.

2. The high-efficiency smoke extraction well as described in claim 1, characterized in that: The contraction section (2) is generally truncated cone-shaped, with a wide opening at one end and a narrow opening at the other end. The narrow opening of the contraction section (2) is connected to the exhaust section (3), and the wide opening of the contraction section (2) is connected to the swirl section (1).

3. The high-efficiency smoke extraction well as described in claim 1, characterized in that: The connecting ring (4) is connected to the lower end of the swirl section (1). The outer wall of the connecting ring (4) is connected to the air inlet pipe (5). One end of the air inlet pipe (5) is connected to the inner wall of the connecting ring (4), and the other end is connected to the air outlet of the blower (6). The air inlet pipe (5) is located in the tangential direction of the connecting ring (4).

4. The high-efficiency smoke extraction well as described in claim 3, characterized in that: An arc-shaped opening (7) is provided on one side of the air inlet pipe (5) that is connected to the connecting ring (4), and the arc-shaped surface of the arc-shaped opening (7) fits the inner diameter of the connecting ring (4).

5. The high-efficiency smoke exhaust well as described in claim 4, characterized in that: A guide groove (8) is provided on the inner wall of the swirling section (1). The guide groove (8) is spiral in shape and the direction of the spiral of the guide groove (8) is connected to the arc opening (7).

6. The high-efficiency smoke exhaust well as described in claim 1, characterized in that: The transition ring (12) has an extension ring extending toward its center, on which a connecting ring (13) is rotatably mounted. A plurality of the guide plates (17) are evenly distributed on the connecting ring (13), and the outer wall of the connecting ring (13) is provided with external teeth (14). The transition ring (12) is connected to an extension (121) on the outside. A drive wheel (15) is rotatably mounted on the extension (121). The drive wheel (15) meshes with the external tooth (14). A motor (16) is provided on the inner wall of the transition ring (12). The output end of the motor (16) is connected to the drive wheel (15).

7. The high-efficiency smoke exhaust well as described in claim 6, characterized in that: The guide plate (17) includes a connecting part (171), a first fan part (172) and a second fan part (173). The connecting part (171) is connected to the connecting ring (13). The first fan part (172) is connected to the connecting part (171). The second fan part (173) is connected above the first fan part (172). The arc surfaces of the first fan part (172) and the second fan part (173) are flush with each other in the vertical direction.

8. The high-efficiency smoke exhaust well as described in claim 7, characterized in that: The first fan section (172) and the second fan section (173) have stepped arc surfaces on one side, which enables the guide plate (17) to generate two continuous guides in the vertical direction.

9. The high-efficiency smoke exhaust well as described in claim 1, characterized in that: The transition ring (12) and the contraction section (2), as well as the contraction section (2) and the exhaust section (3), are sealed together by flanges (9).

10. The high-efficiency smoke exhaust well as described in claim 1, characterized in that: The top of the exhaust section (3) is connected to a glass cover (11), and the outer wall of the exhaust section (3) is provided with multiple grids (10) to allow the smoke to be discharged from the exhaust section (3) laterally and reduce rainwater interference.

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