Precast layer-by-layer assembled flue

Abstract

The present invention belongs to the technical field of flues, especially precast layer-by-layer assembled flues, and the following scheme is proposed, including a flue and a hoisting and protection assembly for hoisting and protecting the flue; the flue includes a main body of an annular structure, the interior of the main body is pre-buried with a reinforcement layer arranged around it, one end of the reinforcement layer is connected to a hoisting and docking ring of the annular structure, and the outer circle of the hoisting and docking ring away from the reinforcement layer is provided with a stripping groove located on the outer circle of the main body, and also includes an installation method for the precast layer-by-layer assembled flue. The present invention can effectively enhance the strength of the flue, improve the efficiency of flue manufacturing, reduce the flue manufacturing and installation process, reduce the overall cost of flue manufacturing and construction, improve the efficiency of flue installation, improve the sealing of the flue, improve the smoothness of flue smoke exhaust, improve the safety of flue installation, effectively prevent the flue from being damaged during the installation process, and avoid the safety hazard of objects falling into the reserved holes of the original building flue.

Description

Technical Field

[0001] The invention relates to the technical field of flues, and in particular to a precast layer-by-layer assembled flue. Background Art

[0002] The flue is a tubular device for exhaust gas and smoke. The residential flue refers to a vertical pipe product used to exhaust kitchen smoke or bathroom exhaust gas, also known as an exhaust duct, ventilation duct, and residential exhaust duct. The existing flues are installed by installing 8-10 sections at a time and then plugging them. In this process, in order to facilitate the installation operation, the gap between the building installation hole reserved on the building and the outer periphery of the flue is 50mm-80mm. At the same time, the top of the flue is not blocked and protected, which makes it easy for operating and installing personnel and building debris to fall from the flue and the building installation hole, which is easy to damage the flue and also easy to cause safety accidents. At the same time, in order to facilitate the docking installation of the flue and the building, it is necessary to reserve or install connectors on the flue body, which destroys the integrity of the flue. On the one hand, the strength of the flue is reduced, and on the other hand, the flue production operation is inconvenient, which increases the cycle and cost of flue production.

[0003] Secondly, during the installation of traditional flues, 8-10 sections are installed at one time before the gaps in the flues are sealed. Due to the excessive number of stacked flues, the squeezing force on the bottom flues is relatively large, which may cause the flues to collapse and cause installation accidents in serious cases. At the same time, due to the thin walls of the flues, the traditional installation method causes the verticality of the flues to fail to meet the requirements during installation, which increases the difficulty of secondary construction.

[0004] The traditional one-time plugging method cannot effectively plug the inner gap of the flue, resulting in poor sealing of the inner gap of the flue. In severe cases, it causes gas cross-flow in the flue and water leakage at the foot of the flue.

[0005] During the hoisting process, the traditional telescopic bundling hoisting method is not convenient for hoisting operation. In addition, because the flue is installed in the kitchen and bathroom with a small space, the flue hoisting is prone to collision and cause damage to the flue. Therefore, it is necessary to pre-cast layer-by-layer assembled flue. Summary of the invention

[0006] The precast layer-by-layer assembled flue provided by the present invention solves the problems existing in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] Precast layer-by-layer assembled flue, including the flue and the hoisting and protection components used for hoisting and protection of the flue;

[0009] The flue comprises a main body of an annular structure, a reinforcement layer is pre-buried inside the main body and arranged around it, one end of the reinforcement layer is connected to a hoisting docking ring of the annular structure, a stripping groove is arranged on the outer circle of the main body at the end of the hoisting docking ring away from the reinforcement layer, one end of the hoisting docking ring extends into the stripping groove and penetrates the docking hole, and a clamping groove is arranged on the inner circle of the main body at the end of the reinforcement layer away from the hoisting docking ring;

[0010] The cam is provided with an outer ring which is fixedly provided with an outer ring of the outer ring, and the inner ring of the inner ring is provided with an inner ring connecting the outer ring with the cover shell, and the inner ring of the inner ring connecting the outer ring is provided with a rotating rod which is movably sleeved with the inner side wall of the cover shell end portion, and a deflection plate is fixedly provided with an outer ring of the rotating rod near the cover shell opening, and the deflection plate is fixedly provided with a pushing groove which is arranged around it, and the pushing groove is slidably connected with a sliding block, and the sliding block is fixedly provided with a push rod, and the other end of the push rod is fixedly provided with an extrusion plate which is arranged parallel to the inner side wall adjacent to the inner ring connecting plate, and the extrusion plate is fixedly provided with a plug-in rod at one end of the extrusion plate away from the push rod, and the extrusion plate is slidably sleeved with a guide rod, one end of the guide rod is fixedly provided with a support plate of the same annular structure, and the support plate is movably sleeved with the deflection plate, the inner ring connecting plate is penetrated with a plug-in hole which is docked with the plug-in rod, and a lifting ring is fixedly provided on the side of the cover shell away from the outer side connecting plate.

[0011] Preferably, the rotating rod is coaxially arranged with the support plate, the outer ring of the rotating rod is fixedly sleeved with a gear ring, one side of the gear ring is meshed with a gear, the inner ring of the gear is fixedly sleeved with a rotating rod movably sleeved with the cover shell, a handle is installed at the end of the rotating rod extending out of the cover shell, and the outer ring of the rotating rod extending out of the cover shell is threadedly sleeved with a fastening nut.

[0012] Preferably, the deflection plate comprises a circular plate fixedly connected to the rotating rod, the outer ring of the circular plate is provided with outward protrusions, and the number of the protrusions is consistent with the number of the push rods.

[0013] Preferably, the wall thickness of the flue is 15 mm-30 mm, and the wall thickness of the hoisting docking ring is greater than one quarter of the wall thickness of the flue.

[0014] Preferably, the gap between the outer wall of the lifting docking ring and the inner wall of the clamping groove is less than 3 mm.

[0015] Preferably, a triangular-structured diagonal brace is integrally provided at the inner angle of the flue.

[0016] Preferably, the reinforcing layer is made of a steel wire mesh with a diameter of 1-3 mm, the aperture of the steel wire mesh is 15 mm-25 mm, and the reinforcing layer is sandwiched with steel bars and cold-drawn wires distributed along its length.

[0017] The method for manufacturing a precast layer-by-layer assembled flue comprises the following steps:

[0018] The mechanized inner and outer molds are used for one-time vibration molding equipment casting and molding, and the standard positive and negative dimensions of the inner and outer molds of the molding equipment are not greater than 0.5mm;

[0019] After the reinforcement layer is folded and formed, cement pads are fastened to the four sides close to the inner mold respectively.

[0020] The installation method of the precast layer-by-layer assembled flue comprises the following steps:

[0021] Installation of S1 hoisting protection components and hoisting of flue:

[0022] Install the hoisting protection component on one end of the hoisting docking ring on the flue, and connect the hoisting protection component with the hoisting docking ring. Then use a crane to hoist the assembled flue to the location where it needs to be installed. The gap between the reserved building installation hole and the outer periphery of the flue is 30mm-50mm.

[0023] S2 leveling the ground, pouring the floor protection stem, installing the first section of the flue:

[0024] Before installing the first section of the flue, use cement mortar to level the location where the flue is installed on the ground, and use cement mortar to cast the flue placement base. At the same time, reserve a groove that is 15mm larger than the outer diameter of the flue and 40mm deep at the location where the flue is placed to form a ring-shaped protective stem, so as to facilitate the fixation of the first-floor flue. After the flue placement seat is dried and solidified, use a crane to hoist the first section of the flue to the leveling surface, place the flue house in the reserved groove, and adjust the position of the flue to make it vertical;

[0025] Install the shell formwork and pour the first section of the S3 flue:

[0026] Install the shell formwork between the outside of the first section of the flue and the ground, and support the flue and the shell formwork to ensure that the flue is in a vertical state. Then pour concrete between the outer circle of the flue and the inner circle of the shell formwork. After pouring, maintain and dry it.

[0027] S4 flue docking installation:

[0028] After the pouring and curing of the first section of the flue is completed, the hoisting protection assembly at the top of the first section of the flue is removed, and then the flue to be connected is hoisted to the top of the first section of the flue by a crane for set connection operation. During the connection, ensure that the connected flue is in a vertical state;

[0029] After S5 is connected, the shell formwork of the flue is installed and poured:

[0030] After the flue is connected, a casting shell formwork is installed on the outside of the flue, and concrete is poured according to the steps of S3, and after the pouring is completed, curing and drying are carried out;

[0031] S6 flue support installation:

[0032] When the building has reserved flue installation holes, or the special flue of the building cannot be installed and poured synchronously layer by layer, it is necessary to place supporting parts starting from the second section of the flue for supporting installation.

[0033] In the present invention,

[0034] By setting up the flue, hoisting protection components and the installation method of the pre-cast layer-by-layer assembled flue, the strength of the flue is effectively enhanced, the flue production efficiency is improved, the flue production and installation process is reduced, the overall cost of flue production and construction is reduced, the flue installation efficiency is improved, the flue sealing is improved, the flue smoke exhaust is smoother, the safety of flue installation is improved, and the flue damage during the installation process is effectively prevented, avoiding the safety hazard of objects falling into people from the reserved holes in the original building's flue. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the precast layer-by-layer assembled flue proposed by the present invention;

[0036] Figure 2 It is a side view of the precast layer-by-layer assembled flue hoisting protection assembly proposed by the present invention;

[0037] Figure 3 This is a structural schematic diagram of the precast layer-by-layer assembled flue hoisting protection assembly proposed by the present invention;

[0038] Figure 4 This is a schematic structural diagram of the precast layer-by-layer assembled flue body proposed by the present invention.

[0039] In the figure: 11 main body, 12 reinforcement layer, 13 lifting docking ring, 14 docking hole, 15 clamping groove, 2 lifting protection component, 21 cover, 22 outer docking plate, 23 inner ring docking plate, 24 rotating rod, 25 lifting ring, 26 deflection plate, 27 pushing groove, 28 push rod, 29 extrusion plate, 210 plug-in rod, 211 guide rod, 212 support plate, 213 plug-in hole. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1-4 , a precast layer-by-layer assembled flue, including a flue and a hoisting and protection component 2 for hoisting and protecting the flue;

[0042] Further, the flue comprises a main body 11 of an annular structure, a reinforcing layer 12 is pre-buried inside the main body 11 and arranged around it, one end of the reinforcing layer 12 is connected to a hoisting docking ring 13 of an annular structure, a stripping groove is provided on the outer circle of the main body 12 at one end of the hoisting docking ring 13 away from the reinforcing layer 12, one end of the hoisting docking ring 13 extending into the stripping groove passes through a docking hole 14, and a clamping groove 15 is provided on the inner circle of the main body 11 at one end of the reinforcing layer 12 away from the hoisting docking ring 13;

[0043] Specifically, the hoisting protection assembly 2 includes a cover shell 21, an outer butt plate 22 of an annular structure is fixedly connected to the opening of the cover shell 21, an inner ring of the outer butt plate 22 is installed with an inner ring butt plate 23 fixed to the cover shell 21, an inner ring of the inner ring butt plate 23 is installed with a rotating rod 24 movably sleeved with the inner side wall of the end of the cover shell 21, and one end of the rotating rod 24 close to the opening of the cover shell 21 is fixedly connected to a deflection plate 26, and the outer ring of the deflection plate 26 is provided with a push groove 27 arranged around it, and the push groove 27 is slidably connected to a slider, and the slider is fixedly connected to a push rod 28, and the other end of the push rod 28 is fixedly connected to An extrusion plate 29 is arranged parallel to the inner side wall adjacent to the inner ring docking plate 23, and a plug-in rod 210 is fixedly connected to the end of the extrusion plate 29 away from the push rod 28. A guide rod 211 is slidably sleeved on the extrusion plate 29, and one end of the guide rod 211 is fixedly connected to the inner side wall adjacent to the inner ring docking plate 23, and the other end of the guide rod 211 is fixedly connected to a support plate 212 of the same annular structure, and the support plate 212 is movably sleeved with the deflection disk 26. The inner ring docking plate 23 is penetrated by a plug-in hole 213 that docks with the plug-in rod 210, and a lifting ring 25 is fixedly connected to the side of the cover shell 21 away from the outer docking plate 22.

[0044] In particular, the rotating rod 24 is coaxially arranged with the support plate 212, the outer ring of the rotating rod 24 is fixedly sleeved with a gear ring, one side of the gear ring is meshed with a gear, the inner ring of the gear is fixedly sleeved with a rotating rod movably sleeved with the cover shell 21, a handle is installed at one end of the rotating rod extending out of the cover shell 21, and the outer ring of the rotating rod extending out of the cover shell 21 is threadedly sleeved with a fastening nut.

[0045] It is worth noting that the deflection disc 26 includes a circular disc fixedly connected to the rotating rod 24 , and the outer ring of the circular disc is provided with outward protrusions, and the number of the protrusions is consistent with the number of the push rods 28 .

[0046] In addition, the wall thickness of the flue is 15 mm-30 mm, and the wall thickness of the hoisting docking ring 13 is greater than one quarter of the wall thickness of the flue.

[0047] In addition, the gap between the outer wall of the lifting docking ring 13 and the inner wall of the clamping groove 15 is less than 3 mm.

[0048] Furthermore, a triangular-structured diagonal brace is integrally provided at the inner angle of the flue.

[0049] To be explained, the reinforcing layer 12 is made of a steel wire mesh with a diameter of 1-3 mm, the aperture of the steel wire mesh is 15 mm-25 mm, and the reinforcing layer 12 is sandwiched with steel bars and cold-drawn wires distributed along its length.

[0050] The method for manufacturing a precast layer-by-layer assembled flue comprises the following steps:

[0051] The mechanized inner and outer molds are used for one-time vibration molding equipment casting and molding, and the standard positive and negative dimensions of the inner and outer molds of the molding equipment are not greater than 0.5mm;

[0052] After the reinforcement layer 12 is folded and formed, cement pads are fastened on the four sides close to the inner mold respectively. The thickness of the cement pads is one-third of the thickness of the flue wall. This method can ensure that the flue does not leak the steel mesh after the pouring is completed, ensure the external pressure strength of the flue, and change the quality problems of traditional flues caused by the inability to center the mesh due to thin walls and leakage of the mesh inside and outside the flue.

[0053] The installation method of the precast layer-by-layer assembled flue comprises the following steps:

[0054] Installation of S1 hoisting protection assembly 2 and hoisting of flue:

[0055] Install the hoisting protection component 2 on one end of the hoisting docking ring 13 on the flue, and dock the hoisting protection component 2 with the hoisting docking ring 13, and then use a crane to hoist the assembled flue to the required installation position for installation. The gap between the reserved building installation hole and the outer periphery of the flue is 30mm-50mm;

[0056] The gap between the existing building installation hole and the outer periphery of the flue is 50mm-80mm. First, this method is installed to reduce the diameter of the building installation hole. At the same time, during assembly, the hoisting protection component 2 is located at the top of the flue to cover the flue, which can prevent building debris and personnel from falling from the flue, and avoid the safety hazard of falling objects and people from the reserved holes of the original building flue. At the same time, because the building installation hole becomes smaller, the strength of the building is increased, and at the same time, it is prevented to a certain extent that people or building debris fall from the building installation hole, which improves the safety of the flue assembly process and effectively prevents the injury of debris falling to people;

[0057] When the hoisting protection assembly 2 is connected to the flue, the connection cavity formed between the outer connection plate 22 and the inner circle connection plate 23 on the cover 21 is first pushed toward the direction of the flue hoisting connection ring 13, so that the hoisting connection ring 13 extends into the connection cavity between the outer connection plate 22 and the inner circle connection plate 23;

[0058] Then, the fastening nut on the rotating rod is rotated so that the fastening nut does not contact the cover 21, and then the rotating rod is rotated. When the rotating rod rotates, the gear ring on it rotates, thereby driving the gear on the rotating rod 24 to rotate, and then the rotating rod 24 rotates accordingly, and then the deflection plate 26 on it is rotated. When the deflection plate 26 rotates, under the guidance of the push groove 27, the slider moves along the disc to the protrusion. At this time, the deflection plate 26 drives the push rod 28 on the slider to move toward the inner side wall of the inner ring docking plate 23. Under the guidance and restriction of the guide rod 211, the extrusion plate 29 on the push rod 28 moves toward the inner side wall adjacent to the inner ring docking plate 23, and then the plug-in rod 210 on the extrusion plate 29 extends from the plug-in hole 213 on the inner ring docking plate 23 to the docking hole 14 on the lifting docking ring 13 for plugging. Finally, the fastening nut on the rotating rod is tightened to fix it.

[0059] During hoisting, the hook on the crane is hung on the hoisting ring 25 on the cover 21, and then the crane is used to hoist it to the location to be installed. This placement is used for hoisting, which can change the trouble of traditional rope binding operation. At the same time, it can change the disadvantage of the flue being damaged by collision with the building during the movement process during the traditional flue hoisting, making it convenient for operators to perform hoisting operations;

[0060] S2 level the ground and install the first section of the flue:

[0061] Before installing the first section of the flue, use cement mortar to level the location where the flue is installed on the ground, and use cement mortar to cast the flue placement base. At the same time, reserve a groove that is 15mm larger than the outer diameter of the flue and 40mm deep at the location where the flue is placed to form a ring-shaped protective stem, which is convenient for fixing the first-floor flue. After the flue placement seat is dried and solidified, use a crane to hoist the first section of the flue to the leveling surface, place the flue house in the reserved groove, and adjust the position of the flue so that the flue is in a vertical state. Place the first section of the flue inside the protective stem for casting and fixing, which can avoid inaccurate flue position on the one hand, and cast and fix the flue from the bottom on the other hand;

[0062] When the flue installation location has facades, cast iron parts, beams and other main building structures, the facades, cast iron parts, beams and other main building structures are used as part of the casting body, and the facades, cast iron parts, beams and other main building structures are cast and formed at one time, so that the outer casting body of the flue is perfectly combined with the existing facades, cast iron parts, beams and other main building structures, thereby improving the pressure resistance of the building and its own flue;

[0063] Install the shell formwork and pour the first section of S3 flue:

[0064] Install the shell formwork between the outside of the first section of the flue and the ground, and support the flue and the shell formwork to ensure that the flue is in a vertical state. Then pour concrete between the outer circle of the flue and the inner circle of the shell formwork. After pouring, maintain and dry it.

[0065] When the location where the flue is to be installed has a building main body such as a facade, cast iron parts, and a beam body, the shell formwork will be cast on the side adjacent to the flue when the facade, cast iron parts, and beam body are wrapped. The flue is installed using a precast assembly molding method of the outer side of the flue and the building main body. First, there is no need to paint the outer side of the flue during the flue production process. On the one hand, it reduces the steps of flue production, thereby improving the flue production efficiency and reducing the flue production cost. On the other hand, it is convenient for quality inspectors to inspect the flue. Since the flue is not painted, it is easier for quality inspectors to check whether the flue surface is cracked, thereby improving the overall quality of the building flue after assembly.

[0066] S4 flue docking installation:

[0067] After the pouring and curing of the first section of the flue is completed, the hoisting protection assembly at the top of the first section of the flue is removed, and then the flue to be connected is hoisted to the top of the first section of the flue by a crane for set connection operation. During the connection, ensure that the connected flue is in a vertical state;

[0068] When docking, apply sealant on the inner side wall of the inner circle of the clamping groove 15 of the first flue section, and apply sealant on the outer circle of the hanging docking ring 13 of the docking flue, and then insert the hoisted flue into the inside of the clamping groove 15 of the first flue section, so that the space between the hanging docking ring 13 and the clamping groove 15 is filled with sealant;

[0069] After S5 is connected, the shell formwork of the flue is installed and poured:

[0070] After the flue is connected, a casting shell formwork is installed on the outside of the flue, and concrete is poured according to the steps of S3, and after the pouring is completed, curing and drying are carried out;

[0071] S6 flue support installation:

[0072] When the building has reserved flue installation holes, or the special flue of the building cannot be installed and poured synchronously layer by layer, it is necessary to place supporting parts starting from the second section of the flue for supporting installation.

[0073] A 20x20x50mm groove is opened on the left and right floor surface of the two outer sides of the opposite side of the hoisting docking ring 13, and a 20x50mm diameter round hole is opened on the opposite wall parallel to the groove with an electric hammer, and the position of the flue for placing the round steel is cut, and then the round steel of the same length and diameter of 18mm is inserted into the grooves and holes opened on both sides, and the fire-resistant sealant is applied to the facade of the hoisting docking ring 13, and then the upper flue is hoisted, and the bottoms of both sides of the upper flue are respectively placed on the supporting round steel;

[0074] In this process, the flue is installed by pouring layer by layer. First, it can overcome the problem that in the existing overall butt-jointed installation of the flue, the gaps of the flue are sealed only after 8-10 sections are installed at one time. The excessive number of stacked layers of the flue causes a large squeezing force on the bottom flue, which can cause the flue to collapse and cause installation accidents in serious cases. This can avoid the problem of the bottom flue being damaged due to excessive stacking, and reduce the damage rate of the flue during the installation process. At the same time, the flue is installed by pre-casting layer by layer assembly, so that the flue and the part poured outside the flue can achieve the main support function, thereby improving the strength of the flue.

[0075] At the same time, the one-time plugging cannot effectively plug the inner gap of the flue, resulting in poor sealing of the inner gap of the flue, which in severe cases causes gas cross-flow in the flue and water leakage at the foot of the flue. At the same time, due to the thin wall of the flue, the traditional installation method causes the verticality of the flue to fail to meet the requirements during installation, which increases the difficulty of secondary construction.

[0076] Finally, the flue is installed by layer-by-layer casting, which makes the flue structure simpler. There is no need to reserve installation holes and install connecting parts on the flue, which improves the integrity of the flue, reduces the difficulty of flue processing, improves flue processing efficiency, and improves flue strength.

[0077] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0079] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Precast layer-by-layer assembled flue, characterized in that: It includes a flue and a hoisting and protection assembly (2) for hoisting and protecting the flue; The flue comprises a main body (11) of an annular structure, a reinforcing layer (12) is pre-buried inside the main body (11) and arranged around the main body (11), one end of the reinforcing layer (12) is connected to a hoisting docking ring (13) of an annular structure, an outer ring of the hoisting docking ring (13) away from the reinforcing layer (12) is provided with a stripping groove located on the outer ring of the main body (11), one end of the hoisting docking ring (13) extending into the stripping groove passes through a docking hole (14), and an end of the reinforcing layer (12) away from the hoisting docking ring (13) is provided with a clamping groove (15) located on the inner ring of the main body (11); The lifting protection component (2) comprises a cover shell (21), an outer docking plate (22) of an annular structure is fixedly connected to the opening of the cover shell (21), an inner ring of the outer docking plate (22) is installed with an inner ring docking plate (23) fixed to the cover shell (21), the inner ring of the inner ring docking plate (23) is installed with a rotating rod (24) movably sleeved with the inner side wall of the end of the cover shell (21), one end of the rotating rod (24) close to the opening of the cover shell (21) is fixedly connected to a deflection plate (26), the outer ring of the deflection plate (26) is provided with a pushing groove (27) arranged around it, the pushing groove (27) is slidably connected to a slider, the slider is fixedly connected to a push rod (28), and the other end of the push rod (28) is fixedly connected to An extrusion plate (29) is arranged parallel to the inner side wall adjacent to the inner ring docking plate (23), and a plug rod (210) is fixedly connected to one end of the extrusion plate (29) away from the push rod (28). A guide rod (211) is slidably sleeved on the extrusion plate (29), and one end of the guide rod (211) is fixedly connected to the inner side wall adjacent to the inner ring docking plate (23). The other end of the guide rod (211) is fixedly connected to a support plate (212) of the same annular structure, and the support plate (212) is movably sleeved with the deflection plate (26). The inner ring docking plate (23) is penetrated by a plug hole (213) that is docked with the plug rod (210), and a lifting ring (25) is fixedly connected to one side of the cover shell (21) away from the outer docking plate (22).

2. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The rotating rod (24) is coaxially arranged with the support plate (212); the outer ring of the rotating rod (24) is fixedly sleeved with a gear ring, one side of the gear ring is meshed with a gear, the inner ring of the gear is fixedly sleeved with a rotating rod movably sleeved with the cover shell (21), one end of the rotating rod extending out of the cover shell (21) is provided with a handle, and the outer ring of the rotating rod extending out of the cover shell (21) is threadedly sleeved with a fastening nut.

3. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The deflection disk (26) comprises a circular disk fixedly connected to the rotating rod (24), the outer ring of the circular disk being provided with outwardly facing protrusions, the number of which is the same as the number of the push rods (28).

4. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The wall thickness of the flue is 15 mm to 30 mm, and the wall thickness of the hoisting docking ring (13) is greater than one quarter of the wall thickness of the flue.

5. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The gap between the outer wall of the lifting docking ring (13) and the inner wall of the clamping groove (15) is less than 3 mm.

6. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The inner circle angle of the flue is provided with a triangular structured diagonal support integrally provided therewith.

7. The precast layer-by-layer assembled flue according to claim 1 is characterized in that: The reinforcing layer (12) is made of a steel wire mesh with a diameter of 1-3 mm, the aperture of the steel wire mesh is 15 mm-25 mm, and the reinforcing layer (12) is sandwiched with steel bars and cold-drawn wires distributed along its length.

8. The method for manufacturing a precast layer-by-layer assembled flue as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The mechanized inner and outer molds are used for one-time vibration molding equipment casting and molding, and the standard positive and negative dimensions of the inner and outer molds of the molding equipment are not greater than 0.5mm; After the reinforcing layer (12) is folded and pressed into shape, cement pads are fastened to the four surfaces close to the inner mold respectively.

9. The method for installing a precast layer-by-layer assembled flue as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Installation of S1 hoisting protection assembly (2) and hoisting of flue: The hoisting protection component (2) is mounted on one end of the hoisting docking ring (13) on the flue, and the hoisting protection component (2) is docked with the hoisting docking ring (13), and then the assembled flue is hoisted to the required installation position by a crane, and the gap between the reserved building installation hole and the outer periphery of the flue is 30 mm to 50 mm; S2 leveling the ground, pouring the floor protection stem, installing the first section of the flue: Before installing the first section of the flue, use cement mortar to level the location where the flue is installed on the ground, and use cement mortar to cast the flue placement base. At the same time, reserve a groove that is 15mm larger than the outer diameter of the flue and 40mm deep at the location where the flue is placed to form a ring-shaped protective stem, so as to facilitate the fixation of the first-floor flue. After the flue placement seat is dried and solidified, use a crane to hoist the first section of the flue to the leveling surface, place the flue house in the reserved groove, and adjust the position of the flue to make it vertical; Install the shell formwork and pour the first section of S3 flue: Install the shell formwork between the outside of the first section of the flue and the ground, and support the flue and the shell formwork to ensure that the flue is in a vertical state. Then pour concrete between the outer circle of the flue and the inner circle of the shell formwork. After pouring, maintain and dry it. S4 flue docking installation: After the pouring and curing of the first section of the flue is completed, the hoisting protection assembly at the top of the first section of the flue is removed, and then the flue to be connected is hoisted to the top of the first section of the flue by a crane for set connection operation. During the connection, ensure that the connected flue is in a vertical state; After S5 is connected, the shell formwork of the flue is installed and poured: After the flue is connected, a casting shell formwork is installed on the outside of the flue, and concrete is poured according to the steps of S3, and after the pouring is completed, curing and drying are carried out; S6 flue support installation: When the building has reserved flue installation holes, or the special flue of the building cannot be installed and poured synchronously layer by layer, it is necessary to place supporting parts starting from the second section of the flue for supporting installation.

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