A fabricated flue and a method of installing the same

Abstract

This invention discloses a prefabricated flue, comprising: multiple standard flues, with adjacent standard flues assembled and connected by standard connectors. Each standard connector includes: a plug-in end that extends into the lower standard flue in a sealed manner; a lower connecting seat with multiple spaced-apart connecting holes, each hole containing a connecting steel reinforcement frame and a layer of cast-in-place concrete; and an upper connecting seat with spaced-apart connecting grooves, the grooves and holes accommodating the same connecting steel reinforcement frame. This invention offers advantages such as ease of transport, installation in confined spaces, and improved construction efficiency. An installation method is also disclosed: S1, the standard flue, standard connectors, bottom connectors, and top connectors are prefabricated as a single unit; S2, the lower and upper connecting seats of two standard flues are aligned, the plug-in end extends into the lower standard flue, the connecting holes are aligned with the connecting grooves, the connecting steel reinforcement frame is placed in, and then concrete is poured. This method eliminates the need for temporary supports, saving time and effort.

Description

Technical Field

[0001] This invention relates to the field of high-rise building flue design technology. More specifically, this invention relates to a prefabricated flue and its installation method. Background Technology

[0002] A flue is a tubular device for emitting exhaust gases and fumes. Residential flues refer to vertical pipes used to exhaust kitchen fumes or bathroom fumes; they are also called ventilation ducts, air ducts, or residential exhaust ducts. Flues are primarily rectangular columns and are often installed at the corners of two walls. Traditional flues were handmade, but their wall thickness and strength were insufficient, resulting in poor quality. Later, improved flues were manufactured using mechanized processes, improving quality and production efficiency. Since the height between floors is typically between 2.7 and 3.3 meters, the height of the flue is generally within this length range, resulting in a heavy and long flue that poses many inconveniences for handling and installation. Furthermore, the flue walls are easily damaged during handling. Installing flues in confined spaces such as kitchens and bathrooms is particularly difficult due to space constraints. During installation, temporary supports are required before the concrete reaches the preset hardness to prevent the flue from tilting or deviating from its original design position, or from tipping over and causing installation hazards. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] To achieve these objectives and other advantages according to the present invention, a prefabricated flue is provided, comprising: at least three standard flues arranged sequentially from bottom to top on each floor, with adjacent standard flues assembled and connected by standard connectors, wherein the standard connectors include:

[0005] A plug-in end is provided at the lower end of the standard flue, and the plug-in end extends into the adjacent lower standard flue in a sealed manner;

[0006] The lower connecting seat is provided on the lower side wall of the standard flue. The lower connecting seat is provided with a plurality of vertically penetrating connecting holes spaced apart. The connecting holes are provided with connecting steel bars and cast-in-place concrete layers.

[0007] An upper connecting seat is provided on the upper side wall of the standard flue. The upper connecting seat is provided with multiple connecting slots that correspond one-to-one with multiple connecting holes of the standard flue located above it. The connecting slots and their corresponding connecting holes accommodate the same connecting steel frame and are filled with the same cast-in-place concrete layer.

[0008] Preferably, the connecting hole and the connecting groove are in the shape of a cuboid, and the width of the connecting groove is smaller than the width of the connecting hole to form a boss. The connecting steel reinforcement frame includes a plurality of transverse bars arranged along the width direction of the connecting groove, and the two ends of the transverse bars overlap the boss.

[0009] Preferably, the top of the connecting hole has at least one pair of grooves opposite each other along its length, and the connecting steel reinforcement frame includes at least one longitudinal bar arranged along the length of the connecting hole, with both ends of the longitudinal bar overlapping the pair of grooves.

[0010] Preferably, the bottom of the connecting groove is provided with at least one limiting groove, and the connecting steel bar frame includes at least one vertical bar arranged along the height direction of the connecting groove, with the lower end of the vertical bar extending into the limiting groove.

[0011] Preferably, the plug-in end includes a plug-in flue with a size smaller than the standard flue, and a first sealing layer laid on the outer wall of the plug-in flue. At least two annular snap-fit ​​portions are provided at intervals on the side wall of the first sealing layer, and the vertical cross-section of the snap-fit ​​portion is a trapezoid with a larger top and a smaller bottom.

[0012] A second sealing layer is provided on the inner wall of the standard flue. The second sealing layer has an abutment part corresponding to the snap-fit ​​part. The vertical cross-section of the abutment part is a trapezoid with a smaller top and a larger bottom. The abutment part and the snap-fit ​​part are fastened together.

[0013] The first sealing layer, the snap-fit ​​portion, the second sealing layer, and the abutment portion are all made of elastic rubber.

[0014] Preferably, it also includes a bottom connector, which is disposed on a standard flue at the bottom of each floor, the bottom connector comprising:

[0015] A supporting steel frame is embedded in the lower side wall of the standard flue, and the portion of the supporting steel frame extending out of the standard flue is fixed inside the floor slab.

[0016] An annular base is disposed on the side wall of the lower connecting seat. The bottom of the annular base is horizontal. The annular base overlaps and is fixed to the floor slab.

[0017] Preferably, it also includes a top connector disposed on a standard flue at the top of each floor, the top connector comprising:

[0018] An annular sealing seat is disposed on the side wall of the upper connecting seat. The top surface of the annular sealing seat is inclined toward its center, and there is a gap between the top of the annular sealing seat and the floor slab.

[0019] A sealant is used to fill the gap between the annular sealing seat and the floor slab.

[0020] A method for installing a prefabricated flue is provided, comprising the following steps:

[0021] S1. Determine the number and length of standard flues on each floor according to the floor height. Standard flues, standard connectors, bottom connectors and top connectors are prefabricated as a single piece.

[0022] S2. Install in sequence from bottom to top. The connection method for two adjacent standard flues is as follows: align the lower and upper connecting seats of the two standard flues so that the plug end of the upper standard flue extends into the installed lower standard flue, and align the connecting hole of the upper standard flue with the connecting groove of the lower standard flue. Place the connecting steel frame into the connecting hole and connecting groove, and then pour concrete to form a cast-in-place concrete layer.

[0023] Preferably, the method further includes the following steps:

[0024] S3. Drill grooves at the corresponding positions around the reserved holes for the flue installation on the floor slab to install the protruding parts of the support steel frame, so that the protruding parts of the support steel frame overlap into the grooves, and the annular base sits on the floor slab around the reserved holes. Place the connecting steel frame into the connecting holes and connecting grooves, and then pour concrete to form a cast-in-place concrete layer. Pour concrete around the grooves and the annular base.

[0025] If this floor is the first floor and there is no underground floor, then a pit and a groove are chiseled out on the floor so that the plug end extends into the pit, the protruding part of the supporting steel frame overlaps into the groove, and the annular base sits on the floor around the pit.

[0026] Preferably, the method further includes the following steps:

[0027] S4. After installing the standard flue of the top section of this floor using the same method as in step S2, fill the gap between the annular sealing seat and the floor ceiling with sealant.

[0028] S5. After completing the standard flue installation on all floors by repeating steps S2 to S4, install the vent cap above the standard flue on the roof.

[0029] The present invention has at least the following beneficial effects:

[0030] First, by designing the flue as a standard flue and designing standard connectors, the prefabricated standard flue can reduce damage to the flue wall during transportation, and is easy to transport and install in confined spaces.

[0031] Secondly, the design of standard connectors can reduce the need for temporary supports, improve construction efficiency, ensure the sealing and connection stability of standard flue connections, and significantly reduce the probability of standard flue misalignment, thus reducing rework.

[0032] Third, by forming bosses and setting limiting grooves and grooves, the connecting steel bars can be positioned in the connecting holes and connecting grooves, avoiding displacement of the connecting steel bar frame when pouring concrete. This ensures that the design position of the connecting steel bars is fixed in the connecting holes and connecting grooves, maximizing their binding and fixing function and improving the connection stability of the upper and lower standard flues.

[0033] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0034] Figure 1 This is a vertical cross-sectional view of the floor slab after the prefabricated flue is connected, according to one of the technical solutions of the present invention.

[0035] Figure 2 This is a vertical cross-sectional view of the adjacent standard flues after they are connected, according to one of the technical solutions of the present invention.

[0036] Figure 3 This is a vertical cross-sectional view of the upper connecting seat of the standard flue according to one of the technical solutions of the present invention;

[0037] Figure 4 This is a vertical cross-sectional view of the lower connecting seat of the standard flue according to one of the technical solutions of the present invention;

[0038] Figure 5 This is a top view of the upper connecting seat of the standard flue according to one of the technical solutions of the present invention;

[0039] Figure 6 This is a top view of the lower connecting seat of the standard flue according to one of the technical solutions of the present invention;

[0040] Figure 7 This is a detailed view of the connecting steel reinforcement frame according to one of the technical solutions of the present invention. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0042] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. It does 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, and therefore should not be construed as a limitation of this invention.

[0043] like Figures 1-7 As shown in the accompanying drawings of this invention, the reference numerals are interpreted as follows: standard flue 100, standard connector 200, plug-in end 21, lower connector 22, connecting hole 23, connecting steel reinforcement frame 24, cast-in-place concrete layer 25, upper connector 26, connecting groove 27, transverse reinforcement 204, groove 206, longitudinal reinforcement 205, limiting groove 207, vertical reinforcement 208, plug-in flue 201, snap-fit ​​part 202, abutting part 203, bottom connector 300, supporting steel reinforcement frame 31, floor slab 1, annular base 32, top connector 400, annular sealing seat 41, sealant 42.

[0044] like Figures 1-7 As shown, this invention provides a prefabricated flue system, comprising at least three standard flues 100 arranged sequentially from bottom to top on each floor, with adjacent standard flues 100 connected by standard connectors 200. When manufactured as multiple standard flues 100 for assembly, the weight of each standard flue 100 is significantly reduced compared to a traditional one-piece molded flue system, and its length is also significantly reduced, thereby significantly reducing weight and minimizing inconvenience caused by excessive weight and length during handling and installation, as well as reducing damage to the flue wall during transport. Furthermore, for confined spaces, such as kitchens, where excessively long flues are inconvenient to adjust and install, segmented installation overcomes these drawbacks.

[0045] The standard connector 200 includes:

[0046] The plug-in end 21 is located at the lower end of the standard flue 100 and extends into the adjacent lower standard flue 100 in a sealed manner; it can connect the upper and lower standard flues 100 and prevent smoke from escaping from the connection point of the upper and lower standard flues 100 during use. Specifically, the plug-in end 21 includes a plug-in flue 201 with a size smaller than the standard flue 100, and a first sealing layer laid on the outer wall of the plug-in flue 201. At least two annular snap-fit ​​portions 202 are provided at intervals on the side wall of the first sealing layer. The vertical cross-section of the snap-fit ​​portion 202 is trapezoidal with a larger upper section and a smaller lower section. A second sealing layer is laid on the inner wall of the standard flue 100. The second sealing layer has an abutment portion 203 corresponding to the snap-fit ​​portion 202. The vertical cross-section of the abutment portion 203 is trapezoidal with a smaller upper section and a larger lower section. The abutment portion 203 is fastened to the snap-fit ​​portion 202. The first sealing layer, the snap-fit ​​portion 202, the second sealing layer, and the abutment portion 203 are all made of elastic rubber. Because of its small size, the insertable flue 201 can quickly extend into the standard flue 100. The first sealing layer and the snap-fit ​​part 202, being elastic, are forced to slide downwards relative to the second sealing layer and the abutment part 203 under the weight of the standard flue 100. During this sliding process, the snap-fit ​​part 202 remains tightly against the abutment part 203 until the bottom of the upper standard flue 100 sits on the top of the lower standard flue 100, at which point the snap-fit ​​part 202 slides into and abuts against the two adjacent abutment parts 203. This significantly improves the sealing performance of the connection and allows for quick installation.

[0047] The lower connecting seat 22 is provided on the lower side wall of the standard flue 100. The lower connecting seat 22 is provided with a plurality of vertically penetrating connecting holes 23 spaced apart. The connecting holes 23 are provided with connecting steel bars 24 and cast-in-place concrete layers 25.

[0048] An upper connecting seat 26 is disposed on the upper side wall of the standard flue 100. The upper connecting seat 26 has multiple connecting grooves 27 spaced apart, each corresponding to a plurality of connecting holes 23 of the standard flue 100 above it. Each connecting groove 27 and its corresponding connecting hole 23 accommodates the same connecting steel reinforcement frame 24 and is covered with the same cast-in-place concrete layer 25. Using multiple connecting steel reinforcement frames 24 to connect the lower connecting seats 22 of two adjacent standard flues 100, and fixing them with the cast-in-place concrete layer 25, significantly improves the stability of the connection and prevents tilting. Through the arrangement of the lower connecting seat 22, connecting holes 23, connecting grooves 27, and connecting steel reinforcement frames 24, the amount of concrete poured is not large, thus the time required to reach the preset strength is short. Therefore, while ensuring connection strength, construction efficiency is significantly improved. Compared to existing technologies where temporary supports need to be erected for each layer of installation, which is time-consuming, cumbersome, and inefficient, and where temporary supports may not withstand the stress, causing significant duct misalignment that exceeds the allowable error and necessitates rework.

[0049] In the above technical solution, by designing the flue as a standard flue 100 and incorporating standard connectors 200, the prefabricated standard flue 100 can be less prone to damage to the flue wall during transportation, making it easier to handle and install in confined spaces. The design of the standard connectors 200 reduces the need for temporary supports, improves construction efficiency, ensures the sealing and connection stability of the standard flue 100, and significantly reduces the probability of the standard flue 100 tilting, thus minimizing rework.

[0050] Furthermore, the connecting hole 23 and the connecting groove 27 are in the shape of a cuboid, and the width of the connecting groove 27 is smaller than the width of the connecting hole 23, forming a boss. The connecting steel reinforcement frame 24 includes a plurality of transverse ribs 204 arranged along the width direction of the connecting groove 27, and the two ends of the transverse ribs 204 overlap the boss. The top of the connecting hole 23 has at least a pair of grooves 206 opposite each other along its length direction. The connecting steel reinforcement frame 24 includes at least one longitudinal rib 205 arranged along the length direction of the connecting hole 23, and the two ends of the longitudinal rib 205 overlap the pair of grooves 206. The bottom of the connecting groove 27 and the boss are respectively provided with at least one limiting groove 207. The connecting steel reinforcement frame 24 includes at least one vertical rib 208 arranged along the height direction of the connecting groove 27, and the lower end of the vertical rib 208 extends into the limiting groove 207. This allows the connecting steel bars to be positioned within the connecting holes 23 and connecting grooves 27, preventing the connecting steel bar frame 24 from shifting during concrete pouring. This ensures that the design position of the connecting steel bars is fixed within the connecting holes 23 and connecting grooves 27, maximizing their binding and fixing function and improving the connection stability of the upper and lower standard flues 100.

[0051] In another technical solution, a bottom connector 300 is also included, which is disposed on the standard flue 100 at the bottom of each floor. The bottom connector 300 includes:

[0052] A supporting steel frame 31 is embedded in the lower side wall of the standard flue 100, and the portion of the supporting steel frame 31 extending out of the standard flue 100 is fixed within the floor slab 1. Since the flue is continuously connected from bottom to top, the load on the bottom flue increases with the number of floors. By setting up the supporting steel frame 31, the load is distributed to each floor's standard flue 100, thus solving the limitation of floor height. Specifically, the supporting steel frame 31 can be cross-shaped, grid-shaped, etc., and is positioned to avoid the connecting holes 23.

[0053] An annular base 32 is disposed on the side wall of the lower connecting seat 22. The bottom of the annular base 32 is horizontal, and the annular base 32 overlaps and is fixed to the floor slab 1. The annular base 32 can be fixed to the floor slab 1 by cast-in-place concrete, which further improves the connection stability and load transfer between the standard flue 100 and the floor slab 1, and also enhances the sealing between the upper and lower floors.

[0054] In another technical solution, a top connector 400 is also included, which is disposed on the standard flue 100 at the top of each floor. The top connector 400 includes:

[0055] An annular sealing seat 41 is disposed on the side wall of the upper connecting seat 26. The top surface of the annular sealing seat 41 is inclined towards its center, and there is a gap between the top of the annular sealing seat 41 and the floor slab. Sealant 42 fills the gap between the annular sealing seat 41 and the floor slab. By providing the annular sealing seat 41 and creating a gap between it and the floor slab, it is easier to fill the sealant 42. The inclined shape helps the sealant 42 remain within the gap, preventing it from flowing out from the outer edge of the annular sealing seat 41, thus improving sealing stability and enhancing the sealing between upper and lower floors.

[0056] A method for installing a prefabricated flue includes the following steps:

[0057] S1. Determine the number and length of standard flue 100 sections per floor based on the floor height. Standard flue 100, standard connector 200, bottom connector 300, and top connector 400 are prefabricated as a single unit. The floor height is usually 2.7~3.3 m. Therefore, the number of standard flue 100 sections per floor is usually set to 3~4 sections. This way, the weight of each standard flue 100 section is appropriate, and it can be moved or lifted by 1~2 people. The number of sections assembled per floor is also appropriate, and there will not be too many splicing and connection points. The length can also be adapted to various commonly used spaces, such as some small kitchens.

[0058] S2. Install the flues sequentially from bottom to top. Specifically, the connection method for two adjacent standard flues 100 is as follows: Align the lower connecting seat 22 and upper connecting seat 26 of the two standard flues 100 so that the insertion end 21 of the upper standard flue 100 extends into the installed lower standard flue 100. Align the connecting hole 23 of the upper standard flue 100 with the connecting groove 27 of the lower standard flue 100. Place the connecting steel frame 24 into the connecting hole 23 and connecting groove 27, and then pour concrete to form a cast-in-place concrete layer 25. The cast-in-place concrete layer 25 can quickly reach the preset strength, and each section of the standard flue 100 is relatively lightweight. Therefore, it can save time in building temporary supports, improve construction efficiency, and does not affect the sealing of adjacent standard flues 100.

[0059] S3. A groove is chiseled at the corresponding position around the reserved hole for the flue installation on the floor slab 1 to install the protruding part of the support steel frame 31, so that the protruding part of the support steel frame 31 overlaps into the groove. The annular base 32 sits on the floor slab 1 around the reserved hole. The connecting steel frame 24 is placed into the connecting hole 23 and the connecting groove 27, and then concrete is poured to form a cast-in-place concrete layer 25. Concrete is poured around the groove and the annular base 32. In the connection between two adjacent floors, the bottom stability of each floor is enhanced by the support steel frame 31 and the annular base 32, and the accumulated load is distributed.

[0060] If this is the first floor and there is no basement, then a recess and groove are chiseled in the floor so that the insertion end 21 extends into the recess, the protruding part of the supporting steel frame 31 overlaps into the groove, and the annular base 32 sits on the floor around the recess. The fixing of the bottom floor is slightly different from that of other floors.

[0061] S4. After installing the standard flue 100 of the top section of this floor using the same method as in step S2, fill the gap between the annular sealing seat 41 and the floor ceiling with sealant 42 to isolate the upper and lower floors and prevent odor from mixing.

[0062] S5. After completing the installation of standard flues 100 on all floors by repeating steps S2-S4, install the vent cap above the standard flue 100 on the roof. Other flue internal components, such as fireproof backflow preventers and flue internal odor prevention structures (such as exhaust guide pipes and airflow transformer components), are all set according to existing standards and will not be described in detail here.

[0063] In the above technical solution, the entire installation method does not require the use of excessively heavy lifting equipment or the construction of temporary supports, saving time and operation. It allows the standard flue 100 to be installed in the pre-drilled holes on the floor according to the preset position, enabling a quick, stable, and easy connection between adjacent standard flues 100. It also connects the standard flues 100 to the floor slabs 1 of each floor, distributing the load and reducing stress between the standard flues 100. After installation, it provides good sealing, preventing odor transfer between upper and lower floors.

[0064] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A prefabricated flue, characterized in that, include: At least three standard flues are installed sequentially on each floor from bottom to top. Adjacent standard flues are connected by standard connectors, wherein the standard connectors include: A plug-in end is provided at the lower end of the standard flue, and the plug-in end extends into the adjacent lower standard flue in a sealed manner; The lower connecting seat is provided on the lower side wall of the standard flue. The lower connecting seat is provided with a plurality of vertically penetrating connecting holes spaced apart. The connecting holes are provided with connecting steel bars and cast-in-place concrete layers. An upper connecting seat is provided on the upper side wall of the standard flue. The upper connecting seat is provided with multiple connecting slots that correspond one-to-one with multiple connecting holes of the standard flue located above it. The connecting slots and their corresponding connecting holes accommodate the same connecting steel frame and are filled with the same cast-in-place concrete layer.

2. The prefabricated flue as described in claim 1, characterized in that, The connecting hole and the connecting groove are in the shape of a cuboid, and the width of the connecting groove is smaller than the width of the connecting hole to form a boss. The connecting steel bar frame includes a plurality of transverse bars arranged along the width direction of the connecting groove, and the two ends of the transverse bars overlap the boss.

3. The prefabricated flue as described in claim 2, characterized in that, The top of the connecting hole has at least one pair of grooves opposite each other along its length direction, and the connecting steel bar frame includes at least one longitudinal bar arranged along the length direction of the connecting hole, with both ends of the longitudinal bar overlapping on the pair of grooves.

4. The prefabricated flue as described in claim 2, characterized in that, The bottom of the connecting groove is provided with at least one limiting groove, and the connecting steel bar frame includes at least one vertical bar arranged along the height direction of the connecting groove, with the lower end of the vertical bar extending into the limiting groove.

5. The prefabricated flue as described in claim 1, characterized in that, The plug-in end includes a plug-in flue with a size smaller than the standard flue, and a first sealing layer laid on the outer wall of the plug-in flue. At least two annular snap-fit ​​parts are provided at intervals on the side wall of the first sealing layer. The vertical cross-section of the snap-fit ​​part is a trapezoid with a larger top and a smaller bottom. A second sealing layer is provided on the inner wall of the standard flue. The second sealing layer has an abutment part corresponding to the snap-fit ​​part. The vertical cross-section of the abutment part is a trapezoid with a smaller top and a larger bottom. The abutment part and the snap-fit ​​part are fastened together. The first sealing layer, the snap-fit ​​portion, the second sealing layer, and the abutment portion are all made of elastic rubber.

6. The prefabricated flue as described in claim 1, characterized in that, It also includes a bottom connector, which is installed on the standard flue at the bottom of each floor, the bottom connector comprising: A supporting steel frame is embedded in the lower side wall of the standard flue, and the portion of the supporting steel frame extending out of the standard flue is fixed inside the floor slab. An annular base is disposed on the side wall of the lower connecting seat. The bottom of the annular base is horizontal. The annular base overlaps and is fixed to the floor slab.

7. The prefabricated flue as described in claim 1, characterized in that, It also includes a top connector, which is installed on a standard flue at the top of each floor, the top connector comprising: An annular sealing seat is disposed on the side wall of the upper connecting seat. The top surface of the annular sealing seat is inclined toward its center, and there is a gap between the top of the annular sealing seat and the floor slab. A sealant is used to fill the gap between the annular sealing seat and the floor slab.

8. The installation method of the prefabricated flue as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Determine the number and length of standard flues on each floor according to the floor height. Standard flues, standard connectors, bottom connectors and top connectors are prefabricated as a single piece. S2. Install in sequence from bottom to top. The connection method for two adjacent standard flues is as follows: align the lower and upper connecting seats of the two standard flues so that the plug end of the upper standard flue extends into the installed lower standard flue, and align the connecting hole of the upper standard flue with the connecting groove of the lower standard flue. Place the connecting steel frame into the connecting hole and connecting groove, and then pour concrete to form a cast-in-place concrete layer.

9. The installation method of the prefabricated flue as described in claim 8, characterized in that, It also includes the following steps: S3. Drill grooves at the corresponding positions around the reserved holes for the flue installation on the floor slab to install the protruding parts of the support steel frame, so that the protruding parts of the support steel frame overlap into the grooves, and the annular base sits on the floor slab around the reserved holes. Place the connecting steel frame into the connecting holes and connecting grooves, and then pour concrete to form a cast-in-place concrete layer. Pour concrete around the grooves and the annular base. If this floor is the first floor and there is no underground floor, then a pit and a groove are chiseled out on the floor so that the plug end extends into the pit, the protruding part of the supporting steel frame overlaps into the groove, and the annular base sits on the floor around the pit.

10. The installation method of the prefabricated flue as described in claim 9, characterized in that, It also includes the following steps: S4. After installing the standard flue of the top section of this floor using the same method as in step S2, fill the gap between the annular sealing seat and the floor ceiling with sealant. S5. After completing the standard flue installation on all floors by repeating steps S2 to S4, install the vent cap above the standard flue on the roof.

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