House externally-hung assembly type exhaust passage system

Abstract

The invention relates to the technical field of residence exhaust ducts, in particular to a residence externally-hung assembly type exhaust duct system which comprises externally-hung exhaust ducts communicated with exhaust ports of all floors and vertically extending along the outer wall of a building, and flow guiding and equalizing devices arranged at the exhaust ports of all the floors. The fireproof check valve is arranged at the air inlet end of the flow guiding and equalizing device; the anti-backflow hood is arranged at the top of the exhaust passage; the exhaust passage comprises a plurality of prefabricated concrete exhaust pipe sections, and the upper portions of the prefabricated concrete exhaust pipe sections are connected with the building outer wall in a welding and / or fastener fastening mode. A connecting steel sleeve coaxial with one precast concrete exhaust pipe section is arranged at the top end of the precast concrete exhaust pipe section, a metal reinforcing hoop is arranged between the inner wall and the outer wall of the precast concrete exhaust pipe section, and the connecting steel sleeve is clamped with the inner wall of the bottom end of the other precast concrete exhaust pipe section in a matched mode. The exhaust passage is convenient to mount and high in typhoon resistance and earthquake resistance, the appearance of the exhaust passage and a building body can be coordinated and unified, and construction of an outdoor exhaust passage in a cast-in-place mode is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of residential exhaust ducts, and in particular to a residential external assembled exhaust duct system. Background Art

[0002] The residential exhaust duct system is also called the residential exhaust duct system, which is used to remove the fumes generated by cooking activities in the residential kitchen or the dirty air in the bathroom.

[0003] The residential exhaust duct system includes three parts: residential exhaust duct, functional components (such as fire dampers, check valves or diversion devices) and roof hoods. However, the existing residential exhaust ducts are usually installed indoors, and the exhaust ducts installed indoors will cause the following defects:

[0004] 1) Indoor pollution: Indoor exhaust ducts are usually arranged against the wall on one side or two sides. It is difficult to seal the exhaust duct joints against the wall, which is prone to smoke leakage and polluting the indoor environment.

[0005] 2) Occupies indoor space; the exhaust duct has large dimensions (especially in high-rise buildings), which wastes precious indoor space in the kitchen and bathroom and occupies the area of ​​the residential unit.

[0006] 3) Inconvenient maintenance and updating: The exhaust duct is installed through the floor and integrated with the main body of the building, making it difficult to replace after damage; in addition, the exhaust duct is installed indoors, which is not convenient for property management personnel to conduct regular inspections and maintenance.

[0007] 4) There are potential safety hazards: the exhaust duct wall is thin and low in strength, and the exhaust duct connection gaps (especially the corners near the wall) are difficult to seal; in the event of a fire, smoke and flames will penetrate the exhaust duct connection gaps and spread into the room, affecting the safety of residents' lives and property.

[0008] For this reason, residential external metal exhaust ducts have appeared in the existing market, and common metal exhaust ducts are stainless steel exhaust ducts and galvanized sheet exhaust ducts.

[0009] However, practice has shown that residential external metal exhaust ducts have the following disadvantages:

[0010] 1) The durability is not high. The service life of the galvanized sheet exhaust duct installed outdoors is generally 10-15 years, and the practical life of the stainless steel exhaust duct installed outdoors is generally about 20 years, which cannot be the same as the main structure of the building.

[0011] 2) The typhoon resistance is not strong. The metal exhaust duct installed outdoors has a small wall thickness and low strength, making it difficult to withstand the impact of strong typhoons.

[0012] 3) Low fire safety. It is difficult to carry out fireproof and heat-insulating coating treatment on the outer periphery of the metal exhaust duct installed outdoors. In the event of a fire, its fire resistance limit is low and it is prone to distortion, deformation and smoke leakage.

[0013] 4) Poor sound insulation and heat insulation performance: Metal materials themselves have a high sound reflectivity. When the gas flows at high speed in the metal exhaust duct, it is easy to produce obvious metal impact sound and vibration noise. The metal exhaust duct is prone to air leakage, which further aggravates the noise transmission.

[0014] 5) The appearance is not coordinated with the main building: The outer surface of the metal exhaust duct is smooth, and it is difficult to do the exterior finishing treatment like the main building, such as pasting tiles, painting exterior wall paint, etc.

[0015] For this reason, there is a method in the existing market where an external ring beam is reserved on the main body of the outdoor building, and a prefabricated concrete exhaust duct is installed and fixed through the ring beam. However, practice has shown that the external ring beam exhaust duct has the following defects:

[0016] 1) The scope of application is not wide: it can only be applied to newly built residential buildings with reserved external ring beams. It is not applicable to a large number of residential buildings that have already been built without reserved external ring beams (such as the renovation of residential buildings in old cities).

[0017] 2) The installation and construction conditions are limited: high-altitude installation and construction can only be carried out under the condition of external scaffolding. If the external scaffolding is re-erected to install the external exhaust duct, not only the construction period is long, but also the cost is high.

[0018] For this reason, cast-in-place concrete exhaust ducts have appeared in the industry in this field. However, this method will lead to the following defects:

[0019] 1) The construction efficiency of on-site cast concrete exhaust duct is low and the construction period is long.

[0020] 2) It is difficult to ensure the accuracy of the exhaust duct size during on-site construction.

[0021] 3) It is difficult to disassemble and assemble the inner formwork, which wastes manpower and increases the construction cost.

[0022] 4) The construction of external cast-in-place concrete exhaust ducts for residential buildings requires a large amount of high-altitude work, is difficult to operate, and is prone to construction safety risks, which results in high construction safety risks.

[0023] In summary, the existing residential external exhaust ducts are either not very durable, have weak typhoon resistance, low fire safety, poor sound insulation or heat insulation performance, inconsistent appearance with the main building, and are only suitable for new residential buildings with reserved external ring beams; or they are constructed using a cast-in-place method.

[0024] Based on this, it is necessary to propose a residential external assembled exhaust duct system. Summary of the invention

[0025] One of the purposes of the present invention is to provide a residential external assembled exhaust duct system, which avoids the use of cast-in-place method to construct outdoor exhaust ducts, and at the same time solves the technical problems of existing outdoor exhaust ducts, such as low durability, low typhoon resistance, low fire safety, low sound insulation or heat insulation performance, inconsistent appearance with the main building, and only suitable for newly built residential buildings with reserved external ring beams.

[0026] In order to achieve the above-mentioned purpose, the present invention provides a residential external assembled exhaust duct system, including an external exhaust duct connected to the exhaust outlets of each floor and extending vertically along the outer wall of the building; the exhaust duct includes a plurality of precast concrete exhaust pipe sections, and the upper part of the precast concrete exhaust pipe section is connected and fixed to the outer wall of the building by welding and / or fastening with fasteners; a connecting steel sleeve coaxial with the precast concrete exhaust pipe section is provided on the top of the precast concrete exhaust pipe section, and a metal reinforcement hoop is provided at the lower end of the inner wall of the precast concrete exhaust pipe section or the lower end between the inner wall and the outer wall, and the metal reinforcement hoop is coaxially arranged with the precast concrete exhaust pipe section, and the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section is adapted and clamped with the position corresponding to the metal reinforcement hoop in another precast concrete exhaust pipe section.

[0027] Furthermore, the fastener is a chemical anchor bolt, an expansion bolt or a through bolt, a through hole is provided on the upper wall of the precast concrete exhaust pipe section connected to the outer wall of the building, a connecting hole is provided on the outer wall of the building, and the fastener passes through the through hole in the precast concrete exhaust pipe section and is connected and fixed to the connecting hole.

[0028] Furthermore, an exterior wall embedded part welded to the exhaust duct embedded part is embedded in the exterior wall of the building.

[0029] Furthermore, the outer wall of the connecting steel sleeve on one of the precast concrete exhaust pipe sections is clamped with the inner cavity of another of the precast concrete exhaust pipe sections in a taper-matching manner.

[0030] Furthermore, a plurality of self-locking structures distributed along its circumference are provided on the bottom end of the inner cavity of the precast concrete exhaust pipe section, and a plurality of locking holes are opened on the outer wall of the connecting steel sleeve along its circumference, and the plurality of locking holes correspond one to one with the plurality of self-locking structures, and each locking structure cooperates with each locking hole to lock the connecting steel sleeve on one precast concrete exhaust pipe section with another precast concrete exhaust pipe section.

[0031] Furthermore, the self-locking structure includes a spring, a locking block and a receiving hole. The receiving hole is opened on the inner wall of the precast concrete exhaust pipe section. The receiving hole can accommodate the locking block. One end of the spring is connected and fixed to the receiving hole, and the other end is connected and fixed to the locking block. The spring extends radially in the precast concrete exhaust pipe section. The locking block is an arc-shaped or spherical structure and is adapted to the locking hole. The locking block is used to cooperate with the locking hole for locking.

[0032] Furthermore, the inner wall of the connecting steel sleeve is coplanar with the inner wall of the precast concrete exhaust pipe section.

[0033] Furthermore, two concrete ribs are arranged on the wall surface of the precast concrete exhaust pipe section facing the outer wall of the building, and the concrete ribs extend along the axial direction of the precast concrete exhaust pipe section.

[0034] Furthermore, cement-based grouting material or non-shrinkage grouting material is poured between the precast concrete exhaust pipe section and the exterior wall of the building, and the cement-based grouting material or non-shrinkage grouting material seals the gap between the precast concrete exhaust pipe section and the exterior wall of the building.

[0035] Furthermore, a metal tenon is provided on the bottom end surface of the precast concrete exhaust pipe section, and a metal groove is provided on the top end surface of the precast concrete exhaust pipe section. The metal groove is located at the periphery of the connecting steel sleeve, and the metal groove is filled with building sealant. The metal tenon on one precast concrete exhaust pipe section is plugged into and matched with the metal groove on another precast concrete exhaust pipe section.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The exhaust duct of the residential external assembled exhaust duct system of the present invention is connected and fixed to the outer wall of the building by welding and / or fastening with fasteners, so as to avoid the outdoor exhaust duct being only suitable for new residential buildings with reserved external ring beams, and at the same time avoid the use of cast-in-place to construct the outdoor exhaust duct, thereby effectively avoiding the following defects: first, the construction efficiency of on-site cast concrete exhaust duct is low and the construction period is long; second, on-site construction makes it difficult to ensure the accuracy of the exhaust duct size; third, it is difficult to disassemble and assemble the internal formwork, which wastes manpower and has high construction costs; fourth, the residential external cast-in-place concrete exhaust duct has a large amount of high-altitude operations, high operating difficulty, and is prone to construction safety risks, and has high construction safety risks.

[0038] 2. In the exhaust duct of the present invention, since a metal reinforcing hoop is provided at the lower end of the inner wall or the lower end between the inner wall and the outer wall of the precast concrete exhaust pipe section, when the connecting steel sleeve at the top of one precast concrete exhaust pipe section is adapted and clamped with the position of the metal reinforcing hoop at the inner bottom end of another precast concrete exhaust pipe section, the stress of the connecting steel sleeve on one precast concrete exhaust pipe section acting on the other precast concrete exhaust pipe section will be transmitted to the metal reinforcing hoop, thereby preventing the other precast concrete exhaust pipe section from cracking; based on this, except for the bottom precast concrete exhaust pipe section, For the precast concrete exhaust pipe section, the upper end of the precast concrete exhaust pipe section is connected and fixed to the outer wall of the building by fastening and / or welding, and the lower end of the precast concrete exhaust pipe section is adapted and clamped to the inner cavity of another precast concrete exhaust pipe section by connecting the steel sleeve; in this way, the upper and lower ends of the precast concrete exhaust pipe section can be fixed, thereby limiting the freedom of the precast concrete exhaust pipe section, and then the connection between the exhaust duct and the outer wall of the building constitutes a solid connection system, so that the entire exhaust duct has extremely strong typhoon resistance and earthquake resistance, and is easy to install.

[0039] 3. The exhaust duct used in the present invention is formed by connecting multiple prefabricated concrete exhaust pipe sections. Therefore, compared with the external metal exhaust duct, the exhaust duct of the present invention has high durability, strong typhoon resistance, high fire safety, good sound insulation or heat insulation performance, and an appearance coordinated with the main body of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the exhaust duct system of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of the embodiment involving the connection between the exhaust duct and the building outer wall;

[0042] Figure 3 The embodiment relates to a schematic diagram of the structure of the exhaust passage, the connection steel sleeve and the building outer wall;

[0043] Figure 4 This is a schematic diagram of the structure of the exhaust passage and the connecting steel sleeve in the embodiment;

[0044] Figure 5 The structure diagram of the embodiment involving the connection of two exhaust channels Figure 1 ;

[0045] Figure 6 The structure diagram of the embodiment involving the connection of two exhaust channels Figure 2 ;

[0046] Figure 7 The structure diagram of the embodiment involving the connection of two exhaust channels Figure 3 ;

[0047] Figure 8The structure diagram of the embodiment involving the connection of two exhaust channels Figure 4 ;

[0048] Fig. 9 The embodiment is a schematic diagram of the structure of the connection between two exhaust passages;

[0049] Fig.10 The structure diagram of the embodiment involving the connection between the exhaust duct and the building outer wall Figure 1 ;

[0050] Fig.11 The embodiment relates to a schematic diagram of a connection structure between an exhaust duct and a building exterior wall. Figure 2 ;

[0051] Fig.12 The embodiment relates to a schematic diagram of the structure of the exhaust duct system connected to the building exterior wall;

[0052] Fig.13 The structure diagram of the embodiment involving the connection between the exhaust duct and the building outer wall Figure 3 ;

[0053] Fig.14 The structure diagram of the embodiment involving the connection between the exhaust duct and the building outer wall Figure 4 .

[0054] Reference numerals in the accompanying drawings:

[0055] 1. Exhaust duct; 10. Precast concrete exhaust pipe section; 101. Connecting steel sleeve; 102. Metal tenon; 103. Metal groove; 104. Concrete rib; 105. Exhaust duct embedded parts; 106. Locking hole; 107. Spring; 108. Locking block; 109. Receiving hole; 11. Fastener; 12. Building sealant; 13. Polymer mortar; 14. Cement-based grouting material; 2. Building exterior wall; 20. Exhaust port; 21. Exterior wall embedded parts; 3. Flow diversion and equalization device; 4. Fire check valve; 5. Exhaust branch pipe; 6. Anti-backflow hood; 7. Connector; 70. Connecting part. DETAILED DESCRIPTION

[0056] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0057] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "width", "up", "down", "front", "back", "top" and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] Please refer to Figure 1 - Fig.14 The present invention provides a residential external assembled exhaust duct system, including an external exhaust duct 1, a flow guide and equalizing device 3, a fire check valve 4 and an anti-backflow hood 6. Among them, the exhaust ports 20 on each floor are connected to the external exhaust duct 1 extending vertically along the outer wall of the building; the exhaust ports 20 on each floor are provided with a flow guide and equalizing device 3; the air inlet end of the flow guide and equalizing device 3 is provided with a fire check valve 4, and the air inlet end of the fire check valve 4 is connected to the kitchen range hood or the exhaust fan of the bathroom through the exhaust branch pipe 5; the anti-backflow hood 6 is provided at the top of the exhaust duct 1. It should be noted that the anti-backflow hood 6, the flow guide and equalizing device 3 and the fire check valve 4 can use existing structures, which will not be explained here.

[0061] The exhaust duct 1 includes a plurality of precast concrete exhaust pipe sections 10, which are connected and fixed to the building exterior wall 2 by welding and / or fastening with fasteners; a connecting steel sleeve 101 is provided on the top of the precast concrete exhaust pipe section 10, the precast concrete exhaust pipe section 10 is coaxial with the connecting steel sleeve 101, a metal reinforcing hoop (not shown) is provided on the inner wall of the precast concrete exhaust pipe section 10, or a metal reinforcing hoop is provided at the bottom between the inner wall and the outer wall of the precast concrete exhaust pipe section 10. Of course, the metal reinforcing hoop is coaxially arranged with the precast concrete exhaust pipe section 10, and the metal reinforcing hoop can be connected and fixed with the steel bars between the inner wall and the outer wall of the precast concrete exhaust pipe section 10. Among them, the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section is adapted and clamped with the position of the corresponding metal reinforcing hoop in another precast concrete exhaust pipe section.

[0062] In one embodiment, illustratively, the metal reinforcing hoop is disposed between the inner wall and the outer wall of the precast concrete exhaust pipe section 10, so that when the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 is adapted and clamped with the inner wall of the bottom end of another precast concrete exhaust pipe section 10, the stress of the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 acting on the other precast concrete exhaust pipe section 10 will be transferred to the metal reinforcing hoop, thereby preventing the other precast concrete exhaust pipe section 10 from cracking. The bottom end surface of the bottom precast concrete exhaust pipe section 10 is sealed and fixedly connected to the building exterior wall.

[0063] Of course, in other embodiments, the metal reinforcement hoop can also be set on the inner wall of the precast concrete exhaust pipe segment 10. In this way, during the combination of any two adjacent precast concrete exhaust pipe segments 10 of the exhaust duct, the connecting steel sleeve 101 on one precast concrete exhaust pipe segment 10 is adapted and clamped with the inner wall of the metal reinforcement hoop of the other precast concrete exhaust pipe segment 10.

[0064] In summary:

[0065] 1. The exhaust duct 1 of the residential external assembled exhaust duct system of the present invention is connected and fixed to the outer wall 2 of the building by welding and / or fastening with fasteners, so that the outdoor exhaust duct 1 is not only suitable for new residential buildings with reserved external ring beams, and the outdoor exhaust duct 1 is not constructed by cast-in-place, thereby effectively avoiding the following defects: first, the construction efficiency of the on-site cast concrete exhaust duct 1 is low and the construction period is long; second, it is difficult to ensure the accuracy of the size of the exhaust duct 1 during on-site construction; third, it is difficult to disassemble and assemble the internal formwork, which wastes manpower and has high construction costs; fourth, the residential external cast-in-place concrete exhaust duct 1 has a large amount of high-altitude operations, high operating difficulty, and is prone to construction safety risks, which has high construction safety risks.

[0066] 2. In the exhaust duct 1 of the present invention, since a metal reinforcing hoop is provided at the lower end of the inner wall or the lower end between the inner wall and the outer wall of the precast concrete exhaust pipe section 10, when the connecting steel sleeve 101 at the top of one precast concrete exhaust pipe section 10 is adapted and clamped with the position of the metal reinforcing hoop at the inner bottom end of another precast concrete exhaust pipe section 10, the stress of the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 acting on the other precast concrete exhaust pipe section 10 will be transmitted to the metal reinforcing hoop, thereby preventing the other precast concrete exhaust pipe section 10 from cracking; based on this, except for the bottom precast concrete exhaust pipe section 10, For the precast concrete exhaust pipe section 10, the upper end of the precast concrete exhaust pipe section 10 is connected and fixed to the building outer wall 2 by fastening and / or welding, and the lower end of the precast concrete exhaust pipe section 10 is adapted and clamped with the inner cavity of another precast concrete exhaust pipe section 10 by connecting the steel sleeve 101; in this way, the upper and lower ends of the precast concrete exhaust pipe section 10 can be fixed, thereby limiting the degree of freedom of the precast concrete exhaust pipe section 10, and then the connection between the exhaust duct 1 and the building outer wall 2 constitutes a solid connection system, so that the entire exhaust duct 1 has extremely strong typhoon resistance and earthquake resistance, and is easy to install. When encountering typhoon weather, after the typhoon wind force acts on the precast concrete exhaust pipe section 10, the upper end of the precast concrete exhaust pipe section 10 is directly transmitted to the building outer wall through the fastener, and the lower end of the precast concrete exhaust pipe section 10 is transmitted to the fastener through the connecting steel sleeve 101 and then transmitted to the building outer wall by the fastener, thereby greatly improving the typhoon resistance and earthquake resistance.

[0067] 3. The exhaust duct 1 used in the present invention is formed by connecting multiple prefabricated concrete exhaust pipe sections 10. Therefore, compared with the external metal exhaust duct 1, the exhaust duct 1 of the present invention has high durability, strong typhoon resistance, strong earthquake resistance, high fire safety, good sound insulation or heat insulation performance, and an appearance coordinated with the main body of the building.

[0068] 4. The precast concrete exhaust pipe section 10 of the present invention can be installed in high altitude dry operation without external scaffolding, and is suitable for the renovation of the exhaust duct system of an existing building; in addition, the precast concrete exhaust pipe section 10 of the present invention can also be directly fixed on the ring beam of the masonry structure, the frame beam of the frame structure, or the wall of the shear wall structure, and is suitable for common building structures. It can be seen that the exhaust duct system of the present invention has a wide range of applications, not only for new residential buildings, but also for the renovation and expansion of existing residential buildings.

[0069] In one embodiment, the precast concrete exhaust pipe section 10 is connected and fixed to the building exterior wall 2 by fastening with fasteners 11. The fasteners 11 in this embodiment are chemical anchor bolts, expansion bolts, or through bolts. That is, the precast concrete exhaust pipe section 10 can be connected and fixed to the building exterior wall 2 by means of chemical anchor bolts, expansion bolts, or through bolts. Specifically, a through hole is provided on the upper part of the wall surface where the precast concrete exhaust pipe section 10 is connected to the building exterior wall 2. A connection hole is formed by drilling a hole at a position corresponding to the through hole on the building exterior wall 2. Fig.10 The fastener 11 passes through the through hole in the precast concrete exhaust pipe section 10 and is connected and fixed to the connecting hole, thereby reliably connecting and fixing the precast concrete exhaust pipe section 10 to the building exterior wall 2.

[0070] Of course, in other embodiments, the fastener 11 can also be connected and fixed to the connection hole on the building exterior wall 2 outside the precast concrete exhaust pipe section 10. Specifically, Fig.13 or Fig.14 As shown, a connector 7 is embedded in the precast concrete exhaust pipe section 10, and the connector 7 is connected and fixed to the reinforcing steel bar inside the precast concrete exhaust pipe section 10. The connector 7 extends outside the precast concrete exhaust pipe section 10 to form a connecting portion 70, and the fastener 11 is connected and fixed to the connecting hole on the building outer wall 2 through the connecting portion 70 from the outside of the precast concrete exhaust pipe section 10. It can be seen that those skilled in the art can reasonably change the connection method of the fastener 11 with the building outer wall, which should also fall within the protection scope of the present invention.

[0071] It should be noted that the present invention uses fasteners 11 to achieve reliable connection between the precast concrete exhaust pipe section 10 and the exterior wall building body; and uses connecting steel sleeves 101 to achieve quick connection between two precast concrete exhaust pipe sections 10.

[0072] Of course, in other embodiments, for example, the prefabricated concrete exhaust pipe section 10 can also be connected and fixed to the building exterior wall 2 by welding. Fig.11 An exhaust duct embedded part 105 is arranged on the wall surface where the precast concrete exhaust pipe section 10 is connected to the building exterior wall 2, and an exterior wall embedded part 21 welded to the exhaust duct embedded part 105 is embedded in the building exterior wall 2. By welding the exterior wall embedded part 21 to the exhaust duct embedded part 105, the precast concrete exhaust pipe section 10 and the building exterior wall 2 can be reliably connected and fixed.

[0073] In other embodiments, as another example, the precast concrete exhaust pipe section 10 may also be connected and fixed to the building exterior wall 2 by welding and fastening with fasteners, which is not limited here.

[0074] In one embodiment, the connecting steel sleeve 101 is connected and fixed to the reinforcing steel bars inside the precast concrete exhaust pipe section 10, so that the connecting steel sleeve 101 and the precast concrete exhaust pipe section 10 form a whole, which can improve the connection performance between the connecting steel sleeve 101 and the precast concrete exhaust pipe section 10. In addition, hanging holes (not shown) are provided on opposite sides of the connecting steel sleeve 101, so that when the precast concrete exhaust pipe section 10 is installed, it is convenient for a tower crane (not shown) to hoist the external precast concrete exhaust pipe section 10.

[0075] In one embodiment, in two adjacent precast concrete exhaust pipe sections 10, the outer wall of the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 is clamped with the inner cavity of the other precast concrete exhaust pipe section 10 in a taper fit manner. Figure 5 As shown, the connecting steel sleeve 101 is a square straight structure, and the inner cavity of the bottom end of the precast concrete exhaust pipe section 10 is a square cone structure. The two precast concrete exhaust pipe sections 10 can be clamped by clamping the inner cavity taper of the square cone structure of the precast concrete exhaust pipe section 10 with the outer wall of the connecting steel sleeve 101 of the square straight structure.

[0076] Of course, in other embodiments, illustratively, Figure 6 As shown, the connecting steel sleeve 101 can be a square cone structure, and the inner cavity at the bottom end of the precast concrete exhaust pipe section 10 is a square straight structure, so that the two precast concrete exhaust pipe sections 10 can be clamped. Figure 7 As shown, the connecting steel sleeve 101 is a square cone structure, and the inner cavity at the bottom end of the precast concrete exhaust pipe section 10 is also a square cone structure, so that the two precast concrete exhaust pipe sections 10 can be clamped. Figure 8 As shown, the connecting steel sleeve 101 is a square straight structure, the inner cavity at the bottom end of the precast concrete exhaust pipe section 10 is a straight structure, and a plurality of self-locking structures distributed along its circumference are arranged on the inner cavity at the bottom end of the precast concrete exhaust pipe section 10, and a plurality of locking holes 106 are opened on the outer wall of the connecting steel sleeve 101 along its own circumference, and the plurality of locking holes 106 correspond to the plurality of self-locking structures one by one, and each locking structure cooperates with each locking hole to lock the connecting steel sleeve 106 on one precast concrete exhaust pipe section with another precast concrete exhaust pipe section 10. Specifically, as Figure 8As shown, the self-locking structure includes a spring 107, a locking block 108 and a receiving hole 109. The receiving hole 109 is opened on the inner wall of the precast concrete exhaust pipe section 10. The receiving hole 109 can accommodate the locking block 108. One end of the spring 107 is connected and fixed to the receiving hole 109, and the other end of the spring 107 is connected and fixed to the locking block 108. The spring 107 extends radially in the precast concrete exhaust pipe section 10. The locking block 108 is an arc-shaped or spherical structure and is adapted to the locking hole 106. The locking block 108 is used to cooperate with the locking hole 106 for locking. In two adjacent precast concrete exhaust pipe sections 10, when the bottom of the inner cavity of the upper precast concrete exhaust pipe section 10 is inserted into the connecting steel sleeve 101 at the top of the lower precast concrete exhaust pipe section 10, the locking block 108 is forced to enter the accommodating hole 109 under the action of the spring. When the two precast concrete exhaust pipe sections 10 are plugged into place, the locking block 108 is aligned with the locking hole 106. Under the action of the spring, the locking block 108 enters the locking hole 106, thereby locking the connecting steel sleeve 106 and the precast concrete exhaust pipe section 10.

[0077] In one embodiment, the inner wall of the connecting steel sleeve 101 is coplanar with the inner wall of the precast concrete exhaust pipe section 10. Figure 4 As shown, this can avoid occupying the exhaust area in the prefabricated concrete exhaust pipe section 10.

[0078] Of course, in other embodiments, the inner wall of the connecting steel sleeve 101 may not be coplanar with the inner wall of the precast concrete exhaust pipe section 10, which is not limited here.

[0079] In one embodiment, referring to Fig.10 and Fig.11 Two oppositely arranged concrete ribs 104 are arranged on the wall surface of the precast concrete exhaust pipe section 10 facing the building exterior wall 2. The concrete ribs 104 are integrally formed with the precast concrete exhaust pipe section 10. The concrete ribs 104 extend along the axial direction of the precast concrete exhaust pipe section 10. The concrete ribs 104 are beneficial to enhancing the overall strength of the precast concrete exhaust pipe section 10.

[0080] In addition, there are multiple exhaust duct embedded parts 105 on each precast concrete exhaust pipe section 10. One end of the exhaust duct embedded part 105 is embedded in the precast concrete exhaust pipe section 10 and fixed to the metal reinforcement hoop, and the other end of the exhaust duct embedded part 105 passes through the concrete rib 104 and is welded to the exterior wall embedded part 21 on the building exterior wall 2. This can greatly enhance the connection performance between the precast concrete exhaust pipe section 10 and the building exterior wall 2.

[0081] In one embodiment, referring to Figure 3 and Fig.10, cement-based grouting material 14 or non-shrinkage grouting material is poured between the precast concrete exhaust pipe section 10 and the building exterior wall 2, and the cement-based grouting material 14 or non-shrinkage grouting material seals the gap between the precast concrete exhaust pipe section 10 and the building exterior wall 2, so that the appearance of the precast concrete exhaust pipe section 10 can be coordinated with the facade of the building exterior wall 2. In addition, since the precast concrete exhaust pipe section 10 has concrete ribs 104, during the installation of the precast concrete exhaust pipe section 10, the concrete ribs 104 can increase the gap between the outer wall surface of the precast concrete exhaust pipe section 10 and the building exterior wall 2, which is conducive to the cement-based grouting material 14 or non-shrinkage grouting material pouring into the gap between the precast concrete exhaust pipe section 10 and the building exterior wall 2.

[0082] In one embodiment, referring to Figure 2 and Fig. 9 The bottom end surface of the precast concrete exhaust pipe section 10 is provided with a metal tenon 102, and the top end surface of the precast concrete exhaust pipe section 10 is provided with a metal groove 103, the metal groove 103 is located at the periphery of the connecting steel sleeve 101, and the metal groove 103 is filled with building sealant 12. Among them, in any two precast concrete exhaust pipe sections 10, the metal tenon 102 on one precast concrete exhaust pipe section 10 is plugged and matched with the metal groove 103 on the other precast concrete exhaust pipe section 10. It can be seen that in the process of connecting the two precast concrete exhaust pipe sections 10, the connection performance of the two precast concrete exhaust pipe sections 10 can be further improved by plugging and matching the metal tenon 102 and the metal groove 103.

[0083] In addition, by filling the metal groove 103 with the building sealant 12, the sealing performance of the connection between the two prefabricated concrete exhaust pipe sections 10 can be achieved to avoid smoke leakage.

[0084] In other embodiments, the metal tenon 102 may also be provided on the top end surface of the precast concrete exhaust pipe section 10 , and the metal groove 103 may be provided on the bottom end surface of the precast concrete exhaust pipe section 10 , which is not limited here.

[0085] In one embodiment, referring to Figure 3 and Fig. 9 A polymer mortar 13 is poured into the gap at the connection of the two precast concrete exhaust pipe sections 10, and the polymer mortar 13 seals the gap at the connection of the two precast concrete exhaust pipe sections 10, so as to further avoid smoke leakage at the connection position of the two precast concrete exhaust pipe sections 10.

[0086] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A residential external assembled exhaust duct system, characterized in that: It comprises an external exhaust duct which is connected with the exhaust outlets of each floor and extends vertically along the outer wall of the building; the exhaust duct comprises a plurality of precast concrete exhaust pipe sections, the upper part of the precast concrete exhaust pipe section is connected and fixed to the outer wall of the building by welding and / or fastening with fasteners; a connecting steel sleeve which is coaxial therewith is arranged on the top of the precast concrete exhaust pipe section, a metal reinforcing hoop is arranged at the lower end of the inner wall of the precast concrete exhaust pipe section or at the lower end between the inner wall and the outer wall, the metal reinforcing hoop is arranged coaxially with the precast concrete exhaust pipe section, and the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section is adapted and clamped with the position corresponding to the metal reinforcing hoop in another precast concrete exhaust pipe section.

2. The residential external assembled exhaust duct system according to claim 1 is characterized in that: The fastener is a chemical anchor bolt, an expansion bolt or a through bolt. A through hole is provided on the upper wall of the precast concrete exhaust pipe section connected to the outer wall of the building. A connecting hole is provided on the outer wall of the building. The fastener passes through the through hole in the precast concrete exhaust pipe section and is connected and fixed to the connecting hole.

3. The residential external assembled exhaust duct system according to claim 1 or 2, characterized in that: An exhaust duct embedded part is arranged on the wall surface where the precast concrete exhaust pipe section is connected to the building exterior wall, and an exterior wall embedded part welded to the exhaust duct embedded part is embedded in the building exterior wall.

4. The residential external assembled exhaust duct system according to claim 1, characterized in that: The outer wall of the connecting steel sleeve on one of the precast concrete exhaust pipe sections is clamped with the inner cavity of the other precast concrete exhaust pipe section in a taper-matching manner.

5. The residential external assembled exhaust duct system according to claim 1, characterized in that: A plurality of self-locking structures distributed along its circumference are arranged on the bottom end of the inner cavity of the precast concrete exhaust pipe section, and a plurality of locking holes are opened on the outer wall of the connecting steel sleeve along its circumference. The plurality of locking holes correspond to the plurality of self-locking structures one by one, and each locking structure cooperates with each locking hole so that the connecting steel sleeve on one precast concrete exhaust pipe section is locked with another precast concrete exhaust pipe section.

6. The residential external assembled exhaust duct system according to claim 5, characterized in that: The self-locking structure includes a spring, a locking block and a receiving hole. The receiving hole is arranged on the inner wall of the precast concrete exhaust pipe section. The receiving hole can receive the locking block. One end of the spring is connected and fixed to the receiving hole, and the other end is connected and fixed to the locking block. The spring extends radially in the precast concrete exhaust pipe section. The locking block is an arc-shaped or spherical structure and is adapted to the locking hole. The locking block is used to cooperate with the locking hole for locking.

7. The residential external assembled exhaust duct system according to claim 1, characterized in that: The inner wall of the connecting steel sleeve is coplanar with the inner wall of the precast concrete exhaust pipe section.

8. The residential external assembled exhaust duct system according to claim 1, characterized in that: Two concrete convex ribs are arranged on the wall surface of the precast concrete exhaust pipe section facing the outer wall of the building, and the concrete convex ribs extend along the axial direction of the precast concrete exhaust pipe section.

9. The residential external assembled exhaust duct system according to claim 1 or 8, characterized in that: Cement-based grouting material or non-shrinkage grouting material is poured between the precast concrete exhaust pipe section and the building exterior wall, and the cement-based grouting material or non-shrinkage grouting material seals the gap between the precast concrete exhaust pipe section and the building exterior wall.

10. The residential external assembled exhaust duct system according to claim 1, characterized in that: The bottom end surface of the precast concrete exhaust pipe section is provided with a metal tenon, and the top end surface of the precast concrete exhaust pipe section is provided with a metal groove, the metal groove is located at the periphery of the connecting steel sleeve, the metal groove is filled with building sealant, and the metal tenon on one precast concrete exhaust pipe section is plugged into and matched with the metal groove on another precast concrete exhaust pipe section.

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