One-way flue duct

Abstract

The utility model relates to the field of flue pipe discloses a one -way flue pipe, including flue pipe main part, the top of flue pipe main part is provided with the extension tube, and the both ends between flue pipe main part and extension tube are fixedly connected with the connecting fixed plate, and the outside of connecting fixed plate is fixedly connected with a plurality of lugs, and the inside of lug is penetrated with the bolt bolt, and the top of bolt bolt is provided with the bolt hole, and the inside of bolt hole is penetrated with the bolt rod, and the middle part of flue pipe main part is fixedly connected with the sleeve pipe, and the inside of sleeve pipe is turned over with the one -way valve plate. The utility model discloses through the outside setting of the support rod of extension tube connection and then connecting fixed plate, through the one end of support rod and upper support sleeve or lower support sleeve fixed respectively, thereby can be with lower support sleeve respectively to the fixed of extension tube and flue pipe main part of upper support sleeve, completes the support effect, can prevent the connection of flue pipe main part and extension tube and cause the problem of inclination fracture, increases the support effect.

Description

Technical Field

[0001] This utility model relates to the field of flue pipe technology, and more specifically, to a unidirectional flue pipe. Background Technology

[0002] Flue pipes are a component of flue systems, primarily used for venting exhaust gases from equipment such as gas water heaters and boilers, and are commonly found in restaurants and industrial workshops. These pipes are made of stainless steel, offering corrosion resistance and excellent sealing. Their structure includes an inner stainless steel layer, an outer galvanized steel layer, and an aluminum silicate fiber felt insulation layer, and they are available in various specifications and shapes.

[0003] In existing technologies, flue pipes are of a fixed length during use. When the length needs to be extended, different pipes are required, which makes it inconvenient to quickly connect the pipes. This results in inconvenience for different usage scenarios. Furthermore, the pipe connections are relatively weak, which can easily cause twisting damage and gas leakage. Therefore, the use of traditional flue pipes is inconvenient. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model first provides a one-way flue pipe, comprising a flue pipe body, an extension pipe at the top end of the flue pipe body, a connecting fixing plate fixedly connected to one end of both the flue pipe body and the extension pipe, a plurality of lugs fixedly connected to the outer side of the connecting fixing plate, a pin penetrating through the lugs, a pin hole at the top end of the pin, a pin rod penetrating through the pin hole, a sleeve fixedly connected to the middle of the flue pipe body, and a one-way valve plate flipped inside the sleeve.

[0005] Optionally, a rotating frame is movably connected to the inner wall of the sleeve, and a rotating shaft is rotatably connected between the rotating frame and the inner wall of the sleeve. The rotating frame is fixedly connected to the one-way valve plate.

[0006] Optionally, the one-way valve plate is an inverted bowl shape.

[0007] Optionally, a flange is fixedly connected to the bottom end of the flue pipe body.

[0008] Optionally, support rods are fixedly connected to the outer sides of both connecting plates.

[0009] Optionally, one end of the top support rod is fixedly connected to an upper support sleeve, and one end of the bottom support rod is fixedly connected to a lower support sleeve.

[0010] Optionally, a lower sealing protrusion is fixedly connected to the top of the flue pipe body and the upper surface of the connecting fixing plate.

[0011] Optionally, an upper sealing groove is provided at the bottom end of the extended tube and on the lower surface of the connecting fixing plate, and the lower sealing protrusion and the upper sealing groove are inserted into each other.

[0012] Optionally, a rubber ring or silicone ring is provided inside the pin hole to increase friction.

[0013] Compared to existing technologies, the unidirectional flue pipe of this utility model comprises: a flue pipe body, an extension pipe, a connecting fixing plate, and an outer lug. When the flue pipe body needs to be extended, the extension pipe can be fitted with the flue pipe body. Subsequently, the connecting fixing plate between the flue pipe body and the extension pipe is fitted, and the lower sealing protrusion and the upper sealing groove are inserted and fitted. Then, a pin is inserted through the outer lug of the connecting fixing plate. After insertion, since the top of the pin has a pin hole, the pin rod can be inserted through the inside of the pin hole to lock and fix the pin. This structure realizes the connection between the flue pipe body and the extension pipe, which is convenient for extension and disassembly.

[0014] By setting up a fixed plate, support rod, upper support sleeve, and lower support sleeve, and then connecting the extension pipe to the fixed plate, a support rod is set on the outside of the fixed plate. One end of the support rod is fixed to the upper support sleeve or the lower support sleeve respectively, so that the upper support sleeve and the lower support sleeve can fix the extension pipe and the flue pipe body respectively, thus completing the support function. This can prevent tilting and breakage at the connection between the flue pipe body and the extension pipe, and increase the support effect. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a unidirectional flue pipe according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0017] Figure 3 This is a structural diagram of the one-way valve plate structure according to an embodiment of the present utility model;

[0018] Figure 4 This is a disassembled structural diagram of the flue pipe body and the extension pipe according to an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Flue pipe body; 2. Flange; 3. Sleeve; 4. Lower support sleeve; 5. Extension pipe; 6. Support rod; 7. One-way valve plate; 8. Rotating shaft; 9. Rotating frame; 10. Lug; 11. Pin; 12. Pin rod; 13. Pin hole; 14. Upper support sleeve; 15. Connecting fixing plate; 16. Lower sealing protrusion; 17. Upper sealing groove. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] This utility model embodiment provides a unidirectional flue pipe, combined with Figures 1 to 4 As shown, the system includes a flue pipe body 1, an extension pipe 5 at the top of the flue pipe body 1, a connecting fixing plate 15 fixedly connected to one end of the flue pipe body 1 and the extension pipe 5, a plurality of lugs 10 fixedly connected to the outside of the connecting fixing plate 15, a pin 11 penetrating through the inside of the lugs 10, a pin hole 13 opened at the top of the pin 11, a pin rod 12 penetrating through the inside of the pin hole 13, a sleeve 3 fixedly connected to the middle of the flue pipe body 1, and a one-way valve plate 7 flipped inside the sleeve 3.

[0023] like Figure 1 and Figure 2 As shown in this embodiment, the main structure and quick-connect mechanism of the flue pipe are described. The main body 1 of the flue pipe is the core airflow channel. The extension pipe 5 at its top provides height adjustability, which can flexibly adapt to the thickness or height requirements of different building roofs, enhancing the product's versatility and installation adaptability. The main body and the extension pipe 5 are connected by a connecting fixing plate 15 and a lug 10, and fixed by a pin bolt 11 and a pin rod 12. Compared with the traditional flange bolt connection, this connection method achieves quick installation and disassembly without the need for specific tools, greatly reducing installation time and labor costs. At the same time, when maintenance or replacement is required, the pipe section can be separated very easily, greatly improving maintenance efficiency.

[0024] like Figure 3 As shown, sleeve 3 serves as the mounting base for the one-way valve plate 7, providing it with a stable and reliable operating environment. The one-way valve plate 7 is a key component for achieving the "one-way" function. Its working principle relies on the natural opening of the flue gas itself due to its own flow pressure (kinetic energy), allowing the flue gas to be smoothly discharged upwards. When there is no external wind pressure or the wind pressure is reversed, the valve plate automatically closes under the action of gravity or a slight breeze. Its technical effect is to effectively prevent backflow of air, eliminating the possibility of outdoor cold air, rainwater, dust, and even small animals entering the room through the flue. This not only improves the thermal efficiency of heating or combustion equipment but also enhances the airtightness and hygiene of the home environment.

[0025] like Figure 3 As shown, optionally, a rotating frame 9 is movably connected to the inner wall of the sleeve 3, and a rotating shaft 8 is rotatably connected between the rotating frame 9 and the inner wall of the sleeve 3. The rotating frame 9 is fixedly connected to the one-way valve plate 7.

[0026] In this embodiment, the rotating shaft 8 ensures that the rotating frame 9 and the one-way valve plate 7 can rotate around a fixed and stable axis. The one-way valve plate 7 is fixedly connected to the rotating frame 9 (e.g., by welding or riveting), ensuring that the valve plate and the rotating frame 9 form a single moving part. The technical effect is a significant improvement in the reliability and durability of the one-way valve, avoiding abnormal noises, jamming, or failures caused by loose connections, and ensuring stable airtightness during long-term use.

[0027] like Figure 3 As shown, optionally, the one-way valve plate 7 is an inverted bowl shape.

[0028] In this embodiment, when the one-way valve plate 7 is closed, the bowl edge faces downwards and covers the top of the pipe, forming a good seal to prevent outdoor cold wind, rain, and dust from seeping into the pipe through the gaps.

[0029] like Figure 1 As shown, optionally, a flange 2 is fixedly connected to the bottom end of the flue pipe body 1.

[0030] In this embodiment, flange 2 is a standardized pipe interface component. Fixing it to the bottom end of the flue pipe body 1 achieves a standardized and airtight connection with the exhaust pipe of the household boiler, wall-hung boiler, or stove below. Tightening with bolts ensures good airtightness at the connection, preventing flue gas leakage into the room and guaranteeing safe use. This is a very mature, reliable, and widely accepted connection method, improving product compatibility and safety.

[0031] like Figure 1 As shown, optionally, support rods 6 are fixedly connected to the outer sides of both connecting and fixing plates 15.

[0032] In this embodiment, support rods 6 are provided on the outer sides of the upper and lower connecting fixing plates 15, which can provide additional reinforcement and stability. These support rods 6 can connect and fix the flue pipe system to the building structure (such as walls and roof frames) through external brackets and other components (the connection method is not limited to brackets, which is existing technology and will not be described in detail here). This can effectively resist the swaying and displacement caused by external forces such as strong winds, enhance the structural stability and wind resistance of the entire smoke exhaust system in long-term use, and avoid the risk of loosening of connection points or failure of seals due to swaying.

[0033] like Figure 1 As shown, optionally, one end of the top support rod 6 is fixedly connected to an upper support sleeve 14, and one end of the bottom support rod 6 is fixedly connected to a lower support sleeve 4.

[0034] In this embodiment, the upper support sleeve 14 and the lower support sleeve 4 are the connecting parts between the support rod 6 and the building structure. The upper support sleeve 14 and the lower support sleeve 4 provide a larger and more distributed stress area, reducing the pressure on the contact points with the building structure and preventing damage to the roof or wall materials; and can use more secure fixing methods such as through bolts to firmly "lock" the flue pipe to the building, further improving the installation flexibility and the overall structural robustness.

[0035] like Figure 4 As shown, optionally, a lower sealing protrusion 16 is fixedly connected to the top of the flue pipe body 1 and the upper surface of the connecting fixing plate 15.

[0036] In this embodiment, the lower sealing protrusion 16 is typically made of high-temperature resistant rubber or elastic silicone material. When the upper and lower pipe sections are joined, the lower sealing protrusion 16 is compressed, forming an effective sealing barrier at the connection interface. It can fill the tiny gaps that may exist on the surface of the connecting fixing plate 15 due to manufacturing tolerances or slight deformation, effectively preventing flue gas from leaking from the connection and simultaneously preventing rainwater from seeping outward along the pipe wall.

[0037] like Figure 4 As shown, optionally, an upper sealing groove 17 is provided at the bottom end of the extended tube 5 and on the lower surface of the connecting fixing plate 15, and the lower sealing protrusion 16 and the upper sealing groove 17 are inserted into each other.

[0038] In this embodiment, the upper sealing groove 17 is designed to interlock with the lower sealing protrusion 16, providing mechanical positioning guidance so that the upper and lower pipe sections can be quickly and accurately aligned at the center during connection, facilitating installation. Simultaneously, it forms a "labyrinthine" sealing structure, greatly enhancing the sealing effect. Even if a small amount of flue gas or moisture crosses the interlocking gap, it will be blocked by the groove structure, making further penetration difficult and ensuring the high airtightness and water resistance of the flue system.

[0039] Optionally, a rubber ring or silicone ring (not shown) is provided inside the pin hole 13. When the pin 12 is inserted into the pin hole 13, the rubber ring or silicone ring can increase the friction at the contact point, preventing the pin 12 from falling off due to the tilt of the installation angle and its own weight, making the overall structure more stable and reliable. In other embodiments, the pin 12 and the pin hole 13 can be threaded together, which also ensures connection stability.

[0040] Working principle: During use, flange 2 is first connected to the flue pipe, thus achieving flue gas exhaust through the flue pipe body 1. During exhaust, the flue gas flows upward through the interior of the flue pipe body 1. The flue gas has thrust, which opens the one-way valve plate 7 inside the middle sleeve 3 of the flue pipe body 1, allowing the rotating shaft 8 to rotate and complete the upward flow of gas. When the flue gas stops flowing at the bottom of the flue pipe body 1, the one-way valve plate 7 will close due to gravity, preventing backflow of flue gas. When the flue pipe body 1 needs to be extended, an extension pipe 5 can be used to connect to it. Then, the connecting fixing plate 15 between the flue pipe body 1 and the extension pipe 5 is engaged, and the lower sealing protrusion 1... The 6 and the upper sealing groove 17 are inserted and matched, and then the outer lug 10 of the fixing plate 15 is connected through the pin 11. After the pin 11 is inserted, the pin 12 is inserted through the pin hole 13 at the top. The pin 12 is inserted through the pin hole 13, which can lock and fix the pin 11. This achieves the connection between the extension pipe 5 and the flue pipe body 1. After the connection, the outer side of the fixing plate 15 is provided with a support rod 6. One end of the support rod 6 is fixed to the upper support sleeve 14 or the lower support sleeve 4 respectively. This can fix the extension pipe 5 and the flue pipe body 1 respectively, complete the support function, prevent the connection between the flue pipe body 1 and the extension pipe 5 from tilting and breaking, and increase the support effect.

[0041] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0042] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure 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 disclosure.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0045] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A unidirectional flue pipe, characterized in that, The flue includes a main body (1), an extension tube (5) is provided at the top of the main body (1), a connecting plate (15) is fixedly connected to one end of the main body (1) and the extension tube (5), a number of lugs (10) are fixedly connected to the outside of the connecting plate (15), a pin (11) is passed through the inside of the lug (10), a pin hole (13) is opened at the top of the pin (11), a pin rod (12) is passed through the inside of the pin hole (13), a sleeve (3) is fixedly connected to the middle of the main body (1), and a one-way valve plate (7) is flipped inside the sleeve (3).

2. The unidirectional flue pipe according to claim 1, characterized in that, The inner wall of the sleeve (3) is movably connected to a rotating frame (9), and a rotating shaft (8) is rotatably connected between the rotating frame (9) and the inner wall of the sleeve (3). The rotating frame (9) is fixedly connected to a one-way valve plate (7).

3. The unidirectional flue pipe according to claim 1, characterized in that, The one-way valve plate (7) is an inverted bowl shape.

4. The unidirectional flue pipe according to claim 1, characterized in that, A flange (2) is fixedly connected to the bottom end of the flue pipe body (1).

5. The unidirectional flue pipe according to claim 1, characterized in that, Support rods (6) are fixedly connected to the outer sides of both connecting plates (15).

6. The unidirectional flue pipe according to claim 5, characterized in that, One end of the top support rod (6) is fixedly connected to an upper support sleeve (14), and one end of the bottom support rod (6) is fixedly connected to a lower support sleeve (4).

7. The unidirectional flue pipe according to claim 1, characterized in that, A lower sealing protrusion (16) is fixedly connected to the top of the flue pipe body (1) and the upper surface of the connecting fixing plate (15).

8. The unidirectional flue pipe according to claim 7, characterized in that, The bottom end of the extended tube (5) and the lower surface of the connecting fixing plate (15) are provided with an upper sealing groove (17), and the lower sealing protrusion (16) and the upper sealing groove (17) are inserted into each other.

9. The unidirectional flue pipe according to any one of claims 1-8, characterized in that, The pin hole (13) is provided with a rubber ring or silicone ring to increase friction.

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