A spiral flow guide flue

Abstract

This utility model discloses a spiral guide flue, relating to the technical field of guide flues. It includes a chimney with a rotatable guide shaft at its center. A spiral guide vane is fixedly connected to the outer surface of the guide shaft. The spiral guide vane, located inside the chimney, rotates with the guide shaft to promote airflow upwards. Ball bearing assemblies are provided at both the upper and lower ends of the guide shaft. This utility model has a reasonable design structure. Under the rotation of the spiral guide vane, an airflow rising along a spiral path is formed within the flue. The rotating spiral guide vane smoothly guides the horizontal airflow to the spiral upward path, causing the airflow to flow tangentially along the pipe wall, avoiding direct impact with the pipe wall, effectively suppressing turbulence generation, and ensuring stable airflow upwards within the chimney. This solves the problem that existing flue gas systems easily impact the pipe wall directly when moving to bends, resulting in turbulent vortex generation and poor flow performance.

Description

Technical Field

[0001] This utility model relates to the technical field of guide flues, specifically a spiral guide flue. Background Technology

[0002] A "flue" refers to a pipe specifically designed to guide and discharge flue gas, exhaust gas, or other combustion products. It serves as the core channel for discharging flue gas, exhaust gas, or particulate matter, and its performance directly affects system energy consumption, emission compliance rate, and equipment lifespan. It can safely guide harmful gases produced after fuel combustion to the outside of buildings or designated treatment facilities, preventing them from accumulating indoors and causing poisoning or explosion hazards. It is particularly useful in kitchens of residential buildings, maintaining fresh indoor air, and is widely used in residential, commercial, and other fields.

[0003] Existing flues are generally circular or square pipes. Flue gas enters from one end indoors and is discharged outdoors through the pipe. However, due to site conditions and location limitations, flues often do not consist of only one straight pipe, making it impossible to exhaust gas straight up and down. They usually have a main pipe and a secondary pipe that bends out, or the pipe itself is L-shaped. When flue gas flows in the flue, it makes a right-angle turn when it flows from the secondary pipe to the main pipe. Under inertia, the flue gas is prone to impacting the inner wall of the main pipe head-on, thereby generating turbulent vortices and resulting in poor flow. To address these issues, we provide a spiral guide flue. Utility Model Content

[0004] I. Technical problems to be solved

[0005] This utility model proposes a spiral guide flue, which solves the problem that when the flue gas moves to the bend position, it is easy for the flue gas to impact the pipe wall head-on, thereby generating turbulent vortices and resulting in poor flow effect.

[0006] II. Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spiral guide flue, comprising a chimney, wherein a rotatable guide shaft is disposed at the center of the chimney, and a spiral guide vane is fixedly connected to the outer surface of the guide shaft. The spiral guide vane is located inside the chimney and rotates with the guide shaft to promote the upward movement of airflow. Ball bearing assemblies are disposed at the upper and lower ends of the guide shaft to support the guide shaft and reduce the friction of its rotation. A non-powered device is disposed at the top of the chimney, and the top of the guide shaft is connected to the non-powered device.

[0008] Furthermore, the ball bearing assembly includes a support rod, one end of which is fixedly connected to the inner wall of the chimney, and the other end of which is fixedly connected to an outer sleeve.

[0009] Furthermore, the outer sleeve is provided with a rotatable inner sleeve, and the inner wall of the inner sleeve is fixedly connected to the guide shaft.

[0010] Furthermore, a lower ball bearing is movably embedded in the inner wall of the outer sleeve, and the outer surface of the lower ball bearing is in contact with the lower surface of the inner sleeve.

[0011] Furthermore, the inner wall of the inner sleeve is movably embedded with side balls, and the outer surface of the side balls is in contact with the inner side wall of the outer sleeve.

[0012] Furthermore, the non-powered device includes a fixing ring, the lower end of which is fixedly connected to the upper end of the chimney, and the upper end of which is rotatably connected to a wind cap.

[0013] Furthermore, an installation plate is fixedly connected to the upper end of the guide shaft, and the upper surface of the installation plate is fixedly installed with the wind cap.

[0014] III. Beneficial Effects:

[0015] Compared with existing technologies, this spiral guide flue has the following advantages:

[0016] (i) This spiral guide flue, by setting up components such as spiral guide vanes, forms an airflow that rises along a spiral path in the flue under the rotation of the spiral guide vanes. When the flue gas enters horizontally, the rotating spiral guide vanes smoothly guide the horizontal airflow to the spiral upward path, so that the airflow flows along the tangential direction of the pipe wall, avoiding direct impact with the pipe wall, effectively suppressing the generation of turbulence, and ensuring the stable rise of the airflow in the flue. This solves the problem that when the flue gas moves to the bend position, it is easy for the flue gas to directly impact the pipe wall, thereby generating turbulent vortices and resulting in poor flow effect.

[0017] (ii) The spiral guide flue, by setting components such as ball bearing assemblies, provides stable support for the entire rotation system and reduces frictional resistance at the upper and lower ends of the guide shaft. The outer sleeve is fixed to the inner wall of the flue by four support rods to ensure that the guide shaft is in the center of the flue. The inner sleeve is fixed to the guide shaft, and the lower ball bearing at its bottom contacts the outer sleeve to achieve axial support and reduce rotational friction. The side ball bearings form radial positioning between the inner sleeve and the outer sleeve to prevent the guide shaft from shaking, and further reduce rotational resistance, making the rotation of the spiral guide vane smoother and more efficient. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the chimney in this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the ball bearing assembly in this utility model;

[0022] Figure 4 This is a cross-sectional view of the outer sleeve in this utility model;

[0023] Figure 5 This is an exploded structural diagram of the wind cap of this utility model.

[0024] In the diagram: 1. Chimney; 2. Guide shaft; 3. Spiral guide vane; 4. Ball bearing assembly; 401. Support rod; 402. Outer sleeve; 403. Inner sleeve; 404. Lower ball bearing; 405. Side ball bearing; 5. No power unit; 501. Fixing ring; 502. Wind cap; 503. Mounting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-5As shown, this utility model provides a technical solution: a spiral guide flue, including a chimney 1. The chimney 1 is made of galvanized steel plate, and the galvanized layer on the surface can form a dense protective film, effectively resisting the corrosion of water vapor and dust in the air, greatly reducing the risk of rust, and the material cost is low, with good processing performance. It is suitable for cost-sensitive scenarios such as residential buildings where flue gas corrosivity is weak, and can maintain the structural integrity of the chimney for a long time. A rotatable guide shaft 2 is set at the center of the chimney 1, and a spiral guide vane 3 is fixedly connected to the outer surface of the guide shaft 2. The spiral guide vane 3 is located inside the chimney 1 and rotates with the guide shaft 2 to promote the upward flow of air. The spiral guide vane 3 is made of thin 304 stainless steel. The stainless steel plate, 1-3mm thick, is lightweight, reducing energy consumption during rotation and making the spiral guide vanes easier to drive. It has good temperature resistance, withstanding flue gas temperatures of 200-300℃, and its smooth surface prevents oil and ash accumulation, maintaining efficient airflow guidance over a long period. Ball bearing assemblies 4 are installed at both the upper and lower ends of the guide shaft 2 to support it and reduce rotational friction. A non-powered device 5 is installed at the top of the chimney 1, connecting the top of the guide shaft 2. During use, the non-powered device 5 provides rotational power to the guide shaft 2, causing it to rotate and thus rotating the spiral guide vanes 3, creating an upward airflow inside the chimney 1. The air suction force draws the flue gas from the bottom into the interior of the chimney 1. The flue gas inside the chimney 1, under the influence of thermal difference, pushes the spiral guide vane 3 upwards, thus promoting its rotation. Combined with the non-powered device 5 at the top, the internal flue gas flow and external wind force drive the spiral guide vane 3 to rotate. When the flue gas passes through the L-shaped bend, the spiral guide vane 3 guides the flue gas along a spiral path, thus avoiding direct impact of the flue gas on the inner wall of the chimney 1, suppressing the generation of turbulent vortices, and increasing the smoke extraction efficiency. The chimney 1 is the main pipe, and multiple secondary pipes can be connected to its side. The rotation of the spiral guide vane 3 inside the main pipe prevents turbulent vortices from forming when the flue gas from the secondary pipes enters the main pipe.

[0027] The ball bearing assembly 4 includes a support rod 401. One end of the support rod 401 is fixedly connected to the inner wall of the chimney 1, and the other end of the support rod 401 is fixedly connected to an outer sleeve 402. There are four support rods 401, which are used to support and fix the outer sleeve 402 in the middle, so that the outer sleeve 402 is fixed at the center of the chimney 1. The support rod 401 and the chimney 1 are made of the same material, which can ensure the electrochemical compatibility of the connection between the two and avoid corrosion due to material differences. At the same time, the material strength is matched, which can stably fix the outer sleeve and ensure that the guide shaft is in the center of the chimney.

[0028] The outer sleeve 402 has a rotatable inner sleeve 403 inside. The inner wall of the inner sleeve 403 is fixedly connected to the guide shaft 2. The inner sleeve 403 is fixed to the guide shaft 2 so as to support the rotation of the guide shaft 2.

[0029] The inner wall of the outer sleeve 402 is movably embedded with a lower ball bearing 404. The outer surface of the lower ball bearing 404 contacts the lower surface of the inner sleeve 403. The lower ball bearing 404 supports the inner sleeve 403, thereby supporting the guide shaft 2 and reducing the friction between the inner sleeve 403 and the outer sleeve 402.

[0030] The inner wall of the inner sleeve 403 is movably embedded with side balls 405. The outer surface of the side balls 405 contacts the inner side wall of the outer sleeve 402, and has the same function as the lower balls 404. The side balls 405 are used to position the inner sleeve 403 in the middle position, while reducing friction and facilitating the rotation of the guide shaft 2.

[0031] The outer sleeve 402 and the inner sleeve 403 are made of cast iron, which has good wear resistance and shock absorption. They are not prone to wear when in contact with the balls and can maintain the fitting accuracy for a long time. They are low in cost, suitable for mass production, and can reduce the overall manufacturing cost of the device.

[0032] The non-powered device 5 includes a fixed ring 501, the lower end of which is fixedly connected to the upper end of the chimney 1. The upper end of the fixed ring 501 is rotatably connected to a wind cap 502, which can rotate with the fixed ring 501. The wind cap 502 is composed of multiple curved blades and can rotate when blown by external wind.

[0033] An installation plate 503 is fixedly connected to the upper end of the guide shaft 2. The upper surface of the installation plate 503 is fixedly installed with the wind cap 502. When the wind cap 502 rotates, the installation plate 503 can drive the guide shaft 2 to rotate, thereby driving the spiral guide vane 3 to rotate. In conjunction with the upward lifting of the flue gas onto the spiral guide vane 3, the spiral guide vane 3 is driven to rotate twice to ensure rotation efficiency and avoid insufficient rotation force caused by only lifting the flue gas or only setting the wind cap 502.

[0034] Working principle: The top wind cap 502 consists of multiple curved blades, which rotate under the action of outdoor natural wind. Since the wind cap 502 is fixedly connected to the guide shaft 2 through the mounting plate 503, the rotational force is directly transmitted to the guide shaft 2 through the mounting plate 503, driving the guide shaft 2 and the spiral guide vanes 3 fixed on the outer surface to rotate synchronously, providing power for the airflow movement in the flue. When the flue gas enters from the bottom of the flue, because the flue gas temperature is higher than the surrounding air, an upward natural lift is generated under the action of thermal difference. At this time, the upward flowing flue gas directly impacts the blade surface of the spiral guide vanes 3, further pushing the spiral guide vanes 3 to rotate. This process, together with the top unpowered device 5, forms a dual drive, significantly improving the rotational efficiency of the spiral guide vanes 3, ensuring that even under weak wind conditions, a stable rotational state can still be maintained, providing continuous power for airflow guidance.

[0035] Under the rotation of the spiral guide vane 3, an airflow rising along a spiral path is formed inside the flue. For L-shaped bend pipes and main and auxiliary pipe structures, in traditional structures, horizontally entering flue gas directly impacts the vertical pipe wall, causing turbulent vortices. In this scheme, the flue gas flows into the interior of the chimney 1 from the auxiliary pipe. The rotating spiral guide vane 3 smoothly guides the horizontally flowing flue gas to the spiral upward path, causing the airflow to flow spirally upward along the pipe wall, avoiding direct impact with the pipe wall and effectively suppressing turbulence generation. The spiral airflow field formed by the spiral guide vane 3 guides the incoming flue gas, allowing the flue gas in the auxiliary pipe to smoothly merge along the spiral path of the main pipe, preventing the convergence of airflows from different directions and ensuring the stable upward movement of the airflow in the main pipe. From the perspective of the flue gas flow path, after the flue gas is generated, it flows in the auxiliary pipe. The flue gas from multiple auxiliary pipes is concentrated and injected into the main pipe, i.e., the chimney 1, and then flows upward. This scheme solves the flow effect of the flue gas when it enters the interior of the chimney 1 from the auxiliary pipe, making the flue gas flow into the chimney 1 more smoothly and move upward.

[0036] The ball bearing assemblies 4 at the upper and lower ends of the guide shaft 2 provide stable support for the entire rotation system and reduce frictional resistance. The outer sleeve 402 is fixed to the inner wall of the chimney 1 by four support rods 401, ensuring that the guide shaft 2 is centered in the chimney 1. The inner sleeve 403 is fixed to the guide shaft 2, and its lower ball bearings 404 contact the outer sleeve 402, providing axial support and reducing rotational friction. The side ball bearings 405 form a radial positioning between the inner sleeve 403 and the outer sleeve 402, preventing the guide shaft 2 from shaking and further reducing rotational resistance, making the rotation of the spiral guide vane 3 smoother and more efficient.

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A spiral guide flue, comprising a chimney (1), characterized in that: The center of the chimney (1) is provided with a rotatable guide shaft (2), and a spiral guide vane (3) is fixedly connected to the outer surface of the guide shaft (2). The spiral guide vane (3) is located inside the chimney (1) and rotates with the guide shaft (2) to promote the upward flow of air. The upper and lower ends of the guide shaft (2) are provided with ball bearing assemblies (4) to support the guide shaft (2) and reduce the friction of its rotation. The top of the chimney (1) is provided with a non-powered device (5), and the top of the guide shaft (2) is connected to the non-powered device (5).

2. The spiral guide flue according to claim 1, characterized in that: The ball bearing assembly (4) includes a support rod (401), one end of which is fixedly connected to the inner wall of the chimney (1), and the other end of which is fixedly connected to an outer sleeve (402).

3. The spiral guide flue according to claim 2, characterized in that: The outer sleeve (402) is provided with a rotatable inner sleeve (403), and the inner wall of the inner sleeve (403) is fixedly connected to the guide shaft (2).

4. A spiral guide flue according to claim 3, characterized in that: The inner wall of the outer sleeve (402) is movably inlaid with a lower ball bearing (404), and the outer surface of the lower ball bearing (404) is in contact with the lower surface of the inner sleeve (403).

5. A spiral guide flue according to claim 4, characterized in that: The inner wall of the inner sleeve (403) is movably inlaid with side balls (405), and the outer surface of the side balls (405) is in contact with the inner side wall of the outer sleeve (402).

6. A spiral guide flue according to claim 1, characterized in that: The non-powered device (5) includes a fixing ring (501), the lower end of which is fixedly connected to the upper end of the chimney (1), and the upper end of which is rotatably connected to a wind cap (502).

7. A spiral guide flue according to claim 1, characterized in that: The upper end of the guide shaft (2) is fixedly connected to the mounting plate (503), and the upper surface of the mounting plate (503) is fixedly installed with the wind cap (502).

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