House externally-hung assembly type exhaust passage system

Abstract

The utility model 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 can be coordinated and unified with a building main body, and construction of an outdoor exhaust passage in a cast-in-place mode is avoided.

Description

Technical Field

[0001] This utility model relates to the field of residential exhaust duct technology, and in particular to a residential external prefabricated exhaust duct system. Background Technology

[0002] Residential exhaust duct systems, also known as residential ventilation systems, are used to remove cooking fumes from kitchens or foul air from bathrooms.

[0003] Residential ventilation systems consist of three main parts: the ventilation duct itself, functional components (such as fire dampers, check valves, or deflectors), and roof vents. However, existing residential ventilation ducts are typically installed indoors, which leads to the following drawbacks:

[0004] 1) Indoor pollution exists: Indoor exhaust ducts are usually arranged with one or two walls, and it is difficult to seal the joints of the exhaust ducts against the wall, which can easily lead to smoke leakage and pollute the indoor environment.

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

[0006] 3) Inconvenient maintenance and replacement: The exhaust duct is installed through the floor slab and integrated with the main building structure, making it difficult to replace after damage; in addition, the exhaust duct is installed indoors, which makes it inconvenient for property management personnel to conduct regular inspections and maintenance.

[0007] 4) Safety hazards exist: the exhaust duct wall is thin and weak, and the joints of the exhaust duct (especially the inside corners near the wall) are difficult to seal; in case of fire, smoke and flames will penetrate the joints of the exhaust duct and spread into the room, affecting the safety of residents' lives and property.

[0008] As a result, external metal exhaust ducts have appeared on the market for residential buildings. The most common metal exhaust ducts are stainless steel exhaust ducts and galvanized steel exhaust ducts.

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

[0010] 1) The durability is not high. The service life of galvanized steel exhaust ducts installed outdoors is generally 10-15 years, while the service life of stainless steel exhaust ducts installed outdoors is generally around 20 years. They cannot have the same service life as the main building structure.

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

[0012] 3) Low fire safety: It is difficult to cover the exterior of the metal exhaust duct installed outdoors with fireproof and heat insulation treatment. In the event of a fire, its fire resistance limit is low, and it is prone to twisting, deformation and smoke leakage.

[0013] 4) Poor sound and heat insulation performance: Metal materials have a high sound reflectivity. When gas flows at high speed in a metal exhaust duct, it easily produces obvious metallic impact sounds and vibration noise. Metal exhaust ducts are also prone to air leakage, further aggravating noise transmission.

[0014] 5) The appearance is inconsistent with the main building: The outer surface of the metal exhaust duct is smooth, making it difficult to do the same appearance treatment as the main building, such as pasting tiles or painting the exterior wall.

[0015] Therefore, existing solutions on the market involve pre-installing an external ring beam on the main exterior of the building, through which precast concrete exhaust ducts are installed and fixed. However, practice has shown that external ring beam exhaust ducts have the following drawbacks:

[0016] 1) Limited applicability: It is only applicable to newly built residential buildings with reserved external ring beams in the design. It is not applicable to a large number of existing residential buildings without reserved external ring beams (such as the renovation of old residential buildings).

[0017] 2) Installation conditions are limited: High-altitude installation can only be carried out under the condition of external scaffolding. If external scaffolding is re-erected for the installation of external exhaust ducts, the construction period will be long and the cost will be high.

[0018] Therefore, the industry has developed the practice of casting concrete exhaust ducts on the exterior of outdoor building structures. However, this method leads to the following drawbacks:

[0019] 1) On-site pouring of concrete exhaust ducts has low construction efficiency and long construction period.

[0020] 2) On-site construction makes it difficult to guarantee the accuracy of exhaust duct dimensions.

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

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

[0023] In summary, existing residential external exhaust ducts either have low durability, weak typhoon resistance, low fire safety, poor sound or heat insulation performance, and their appearance is inconsistent with the main building structure and they are only suitable for newly built residential buildings with reserved external ring beams; or they are constructed by cast-in-place.

[0024] Therefore, it is necessary to propose a residential external prefabricated exhaust duct system. Summary of the Invention

[0025] One of the objectives of this utility model is to provide a prefabricated exterior exhaust duct system for residential buildings, which avoids the use of cast-in-place construction for outdoor exhaust ducts. At the same time, it solves the technical problems of existing outdoor exhaust ducts, such as low durability, low typhoon resistance, low fire safety, low sound or heat insulation performance, inconsistent appearance with the main building structure, and applicability only to newly built residential buildings with reserved external ring beams.

[0026] To achieve the above objectives, this utility model provides a residential external prefabricated exhaust duct system, including an external exhaust duct connected to the exhaust outlets of each floor and extending vertically along the exterior wall of the building; the exhaust duct includes multiple precast concrete exhaust pipe sections, the upper part of which is connected and fixed to the exterior wall of the building by welding and / or fasteners; a connecting steel sleeve coaxially provided on the top of each precast concrete exhaust pipe section, and a metal reinforcing hoop provided at the lower end of the inner wall of the precast concrete exhaust pipe section or at the lower end between the inner and outer walls, the metal reinforcing hoop being coaxially provided with the precast concrete exhaust pipe section, and the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section being fitted and locked to the position corresponding to the metal reinforcing hoop in another precast concrete exhaust pipe section.

[0027] Furthermore, the fastener is a chemical anchor, expansion bolt, or through bolt. A through hole is provided on the upper part of the wall surface where the precast concrete exhaust pipe section connects to the building's exterior wall. A connection hole is provided on the building's exterior wall. The fastener passes through the through hole from the precast concrete exhaust pipe section and is connected and fixed to the connection hole.

[0028] Furthermore, the building's exterior wall is pre-embedded with an exterior wall component that is welded to the exhaust duct pre-embedded component.

[0029] Furthermore, the outer wall of the connecting steel sleeve on one of the precast concrete exhaust pipe sections is fastened to the inner cavity of the other precast concrete exhaust pipe section by a tapered fit.

[0030] Furthermore, the bottom of the inner cavity of the precast concrete exhaust pipe section is provided with multiple self-locking structures distributed along its circumference, and the outer wall of the connecting steel sleeve is provided with multiple locking holes along its own circumference. The multiple locking holes correspond one-to-one with the multiple 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 to 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 and 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 along the inside of 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 engage 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 provided on the wall surface of the precast concrete exhaust pipe section facing the building exterior wall, and the concrete ribs extend along the axial direction of the precast concrete exhaust pipe section.

[0034] Furthermore, cement-based grout or non-shrink grout is injected between the precast concrete exhaust pipe section and the building exterior wall to seal the gap between the precast concrete exhaust pipe section and the building exterior wall.

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

[0036] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0037] 1. The exhaust duct of this utility model's residential external prefabricated exhaust duct system is connected and fixed to the building's exterior wall by welding and / or fasteners. This avoids the limitation that outdoor exhaust ducts are only suitable for newly built residential buildings with reserved external ring beams, and also avoids the use of cast-in-place construction methods for outdoor exhaust ducts. This effectively avoids the following defects: First, on-site casting of concrete exhaust ducts has low construction efficiency and a long construction period; Second, on-site construction makes it difficult to ensure the accuracy of exhaust duct dimensions; Third, it is difficult to disassemble and assemble the internal formwork, wasting manpower and increasing construction costs; Fourth, the amount of high-altitude work involved in residential external cast-in-place concrete exhaust ducts is large, the operation is difficult, and construction safety risks are high.

[0038] 2. In the exhaust duct of this utility model, since a metal reinforcing hoop is provided at the lower end of the inner wall of the precast concrete exhaust pipe section or at the lower end between the inner and outer walls, when the connecting steel sleeve at the top of one precast concrete exhaust pipe section is fitted and tightened with the corresponding metal reinforcing hoop at the bottom of another precast concrete exhaust pipe section, the stress exerted by the connecting steel sleeve on one precast concrete exhaust pipe section on the other precast concrete exhaust pipe section will be transferred to the metal reinforcing hoop, preventing the other precast concrete exhaust pipe section from cracking; based on this, except for the bottommost precast concrete exhaust pipe section... For precast concrete exhaust pipe sections, the upper end of the precast concrete exhaust pipe section is connected and fixed to the building's exterior wall by fastening and / or welding, and the lower end of the precast concrete exhaust pipe section is fitted and clamped to the inner cavity of another precast concrete exhaust pipe section by connecting steel sleeves. In this way, the upper and lower ends of the precast concrete exhaust pipe section can be fixed, thereby restricting the degree of freedom of the precast concrete exhaust pipe section. This makes the connection between the exhaust duct and the building's exterior wall a robust connection system, giving the entire exhaust duct a strong ability to resist typhoons and earthquakes, and making installation convenient.

[0039] 3. The exhaust duct of this utility model is formed by connecting multiple precast concrete exhaust pipe sections. Therefore, compared with the external metal exhaust duct, the exhaust duct of this utility model has high durability, strong typhoon resistance, high fire safety, good sound insulation or heat insulation performance, and its appearance is coordinated with the main building structure. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the exhaust duct system of this utility model;

[0041] Figure 2 This is a schematic diagram illustrating the connection between the exhaust channel and the building's exterior wall in an embodiment.

[0042] Figure 3 This is a schematic diagram illustrating the structure of the exhaust channel, the connecting steel sleeve, and the connection to the building's exterior wall, as described in the embodiment.

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

[0044] Figure 5 This is a schematic diagram of the structure involving the connection of two exhaust channels in an embodiment. Figure 1 ;

[0045] Figure 6 This is a schematic diagram of the structure involving the connection of two exhaust channels in an embodiment. Figure 2 ;

[0046] Figure 7 This is a schematic diagram of the structure involving the connection of two exhaust channels in an embodiment. Figure 3 ;

[0047] Figure 8This is a schematic diagram of the structure involving the connection of two exhaust channels in an embodiment. Figure 4 ;

[0048] Figure 9 This is a schematic diagram of the structure at the connection of the two exhaust channels in an embodiment;

[0049] Figure 10 This is a schematic diagram illustrating the connection between the exhaust channel and the building's exterior wall in an embodiment. Figure 1 ;

[0050] Figure 11 This is a schematic diagram of the connection structure between the exhaust duct and the building's exterior wall, as shown in the embodiment. Figure 2 ;

[0051] Figure 12 This is a schematic diagram illustrating the connection between the exhaust duct system and the building's exterior wall, as shown in the embodiment.

[0052] Figure 13 This is a schematic diagram illustrating the connection between the exhaust channel and the building's exterior wall in an embodiment. Figure 3 ;

[0053] Figure 14 This is a schematic diagram illustrating the connection between the exhaust channel and the building's exterior wall in an embodiment. Figure 4 .

[0054] Numbering in each attached figure:

[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 part; 106. Locking hole; 107. Spring; 108. Locking block; 109. Receiving hole; 11. Fastener; 12. Building sealant; 13. Polymer mortar; 14. Cement-based grout; 2. Building exterior wall; 20. Exhaust outlet; 21. Exterior wall embedded part; 3. Flow guiding and equalizing device; 4. Fireproof check valve; 5. Exhaust branch pipe; 6. Anti-backflow vent cap; 7. Connector; 70. Connection part. Detailed Implementation

[0056] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0057] In the description of this utility model, it should be understood that the terms "width", "upper", "lower", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] Please refer to Figure 1 - Figure 14 This utility model provides a residential external prefabricated exhaust duct system, including an external exhaust duct 1, a flow guiding and equalizing device 3, a fireproof check valve 4, and an anti-backflow vent cap 6. Each floor's exhaust outlet 20 is connected to an external exhaust duct 1 extending vertically along the building's exterior wall; each floor's exhaust outlet 20 is equipped with a flow guiding and equalizing device 3; the air inlet end of the flow guiding and equalizing device 3 is equipped with a fireproof check valve 4, and the air inlet end of the fireproof check valve 4 is connected to a kitchen range hood or a bathroom exhaust fan via an exhaust branch pipe 5; the anti-backflow vent cap 6 is located at the top of the exhaust duct 1. It should be noted that the anti-backflow vent cap 6, the flow guiding and equalizing device 3, and the fireproof check valve 4 can use existing structures, which will not be described here.

[0061] The exhaust duct 1 includes multiple precast concrete exhaust pipe sections 10, which are connected and fixed to the building exterior wall 2 by welding and / or fasteners. A connecting steel sleeve 101 is provided at the top of each precast concrete exhaust pipe section 10, and the precast concrete exhaust pipe section 10 and the connecting steel sleeve 101 are coaxial. A metal reinforcing hoop (not shown) is provided on the inner wall of each precast concrete exhaust pipe section 10, or a metal reinforcing hoop is provided at the bottom between the inner and outer walls of the precast concrete exhaust pipe section 10. Of course, the metal reinforcing hoop is coaxial with the precast concrete exhaust pipe section 10 and can be connected and fixed to the reinforcing bars between the inner and outer walls of the precast concrete exhaust pipe section 10. Specifically, the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section is fitted and locked into position with the corresponding metal reinforcing hoop inside another precast concrete exhaust pipe section.

[0062] In one embodiment, exemplarily, a metal reinforcing hoop is disposed between the inner and outer walls of the precast concrete exhaust pipe section 10. Thus, when the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 is fitted and tightened with the bottom inner wall of another precast concrete exhaust pipe section 10, the stress exerted by the connecting steel sleeve 101 on the other precast concrete exhaust pipe section 10 is transferred to the metal reinforcing hoop, preventing the other precast concrete exhaust pipe section 10 from cracking. The bottom end face of the lowest precast concrete exhaust pipe section 10 is sealed and fixedly connected to the building's exterior wall.

[0063] Of course, in other embodiments, the metal reinforcing hoop can also be set on the inner wall of the precast concrete exhaust pipe section 10. In this way, during the combination of any two adjacent precast concrete exhaust pipe sections 10, the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 is fitted and locked with the inner wall of the metal reinforcing hoop of the other precast concrete exhaust pipe section 10.

[0064] In conclusion:

[0065] 1. The exhaust duct 1 of the residential external prefabricated exhaust duct system of this utility model is connected and fixed to the building exterior wall 2 by welding and / or fasteners. This avoids the fact that the outdoor exhaust duct 1 is only suitable for newly built residential buildings with reserved external ring beams, and also avoids the use of cast-in-place construction of the outdoor exhaust duct 1. This effectively avoids the following defects: First, the construction efficiency of cast-in-place concrete exhaust duct 1 is low and the construction period is long; Second, it is difficult to ensure the accuracy of the dimensions of the exhaust duct 1 during on-site construction; Third, it is difficult to disassemble and assemble the internal formwork, which wastes manpower and increases construction costs; Fourth, the high-altitude operation of the residential external cast-in-place concrete exhaust duct 1 is large, the operation is difficult, and the construction safety risks are high.

[0066] 2. In the exhaust duct 1 of this utility model, since a metal reinforcing hoop is provided at the lower end of the inner wall of the precast concrete exhaust pipe section 10 or at the lower end between the inner and outer walls, when the connecting steel sleeve 101 at the top of one precast concrete exhaust pipe section 10 is fitted and tightened with the metal reinforcing hoop at the bottom of another precast concrete exhaust pipe section 10, the stress exerted by the connecting steel sleeve 101 on one precast concrete exhaust pipe section 10 on the other precast concrete exhaust pipe section 10 will be transferred to the metal reinforcing hoop, preventing the other precast concrete exhaust pipe section 10 from cracking; based on this, except for the bottommost 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 exterior wall 2 by fastening and / or welding, and the lower end of the precast concrete exhaust pipe section 10 is fitted and clamped to the inner cavity of another precast concrete exhaust pipe section 10 through a connecting steel sleeve 101. In this way, the upper and lower ends of the precast concrete exhaust pipe section 10 can be fixed, thereby restricting the degree of freedom of the precast concrete exhaust pipe section 10, and thus making the connection between the exhaust duct 1 and the building exterior wall 2 a robust connection system, giving the entire exhaust duct 1 extremely strong typhoon resistance and earthquake resistance, and making installation convenient. In the event of a typhoon, after the typhoon winds act 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 exterior wall through the fasteners, and the lower end of the precast concrete exhaust pipe section 10 is transmitted to the fasteners through the connecting steel sleeve 101, and then to the building exterior wall through the fasteners, thereby greatly improving the typhoon resistance and earthquake resistance.

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

[0068] 4. The precast concrete exhaust pipe section 10 of this utility model can be installed at height without external scaffolding, making it suitable for the renovation of exhaust duct systems in existing buildings. Furthermore, the precast concrete exhaust pipe section 10 of this utility model can also be directly fixed to the ring beam of a masonry structure, the frame beam of a frame structure, or the wall of a shear wall structure, making it suitable for common building structures. Therefore, the exhaust duct system of this utility model has a wide range of applications, suitable not only for newly built 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 fasteners 11. In this embodiment, the fasteners 11 are chemical anchors, 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 anchors, 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 connects to the building exterior wall 2, and a connecting hole is drilled on the building exterior wall 2 at the position corresponding to the through hole. (Refer to...) Figure 10 Fastener 11 passes through the through hole and is connected to the connection hole inside the precast concrete exhaust pipe section 10, 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 on the outside of the precast concrete exhaust pipe section 10. Specifically, as shown in the figure... Figure 13 Or such as Figure 14 As shown, a connector 7 is pre-embedded in the precast concrete exhaust pipe section 10. The connector 7 is connected and fixed to the reinforcing steel bars inside the precast concrete exhaust pipe section 10. The connector 7 extends out of the precast concrete exhaust pipe section 10 as a connecting part 70. The fastener 11 passes through the connecting part 70 from the outside of the precast concrete exhaust pipe section 10 and is connected and fixed to the connecting hole on the building exterior wall 2. Therefore, it can be seen that those skilled in the art can reasonably change the connection method between the fastener 11 and the building exterior wall, and their modifications should also fall within the protection scope of this utility model.

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

[0072] Of course, in other embodiments, for example, the precast concrete exhaust pipe section 10 can also be welded to the building exterior wall 2. Specifically, refer to Figure 11 An exhaust duct embedded part 105 is provided on the wall surface where the precast concrete exhaust pipe section 10 connects to the building exterior wall 2. An exterior wall embedded part 21, which is 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 can be reliably connected and fixed to the building exterior wall 2.

[0073] In other embodiments, as another example, the precast concrete exhaust pipe section 10 can also be connected and fixed to the building exterior wall 2 by welding and fastener fastening, 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 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, lifting holes (not shown) are provided on opposite sides of the connecting steel sleeve 101, which facilitates the lifting of the external precast concrete exhaust pipe section 10 by a tower crane (not shown) during installation.

[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 fastened to the inner cavity of the other precast concrete exhaust pipe section 10 by a tapered fit. For example, as shown... Figure 5 As shown, the connecting steel sleeve 101 has a square straight structure, and the bottom inner cavity of the precast concrete exhaust pipe section 10 has a square conical structure. By engaging and clamping the inner conical structure of the precast concrete exhaust pipe section 10 with the outer wall of the square straight connecting steel sleeve 101, the two precast concrete exhaust pipe sections 10 can be clamped together.

[0076] Of course, in other embodiments, exemplarily, such as Figure 6 As shown, the connecting steel sleeve 101 can be a square cone-shaped structure, and the bottom inner cavity of the precast concrete exhaust pipe section 10 can be a square straight structure, thus also allowing the two precast concrete exhaust pipe sections 10 to be clamped together. Another example is... Figure 7 As shown, the connecting steel sleeve 101 has a square cone-shaped structure, and the inner cavity at the bottom of the precast concrete exhaust pipe section 10 also has a square cone-shaped structure, thus enabling the two precast concrete exhaust pipe sections 10 to be clamped together. Another example is... Figure 8 As shown, the connecting steel sleeve 101 has a square, straight structure, and the bottom inner cavity of the precast concrete exhaust pipe section 10 has a straight structure. Multiple self-locking structures are provided on the bottom inner cavity of the precast concrete exhaust pipe section 10, distributed circumferentially. Multiple locking holes 106 are provided on the outer wall of the connecting steel sleeve 101 along its circumference. Each locking hole 106 corresponds one-to-one with a self-locking structure, and each locking structure engages with its respective locking hole to lock the connecting steel sleeve 106 on one precast concrete exhaust pipe section to 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 and 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 along the inside of the precast concrete exhaust pipe section 10. The locking block 108 has an arc-shaped or spherical structure and is adapted to the locking hole 106. The locking block 108 is used to lock in place with the locking hole 106. 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, under the action of the spring, the locking block 108 is forced into the receiving hole 109. After the two precast concrete exhaust pipe sections 10 are inserted 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 with 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, such as... Figure 4 As shown, this avoids occupying the exhaust area within the precast 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, reference is made to Figure 10 and Figure 11 Two opposing concrete ribs 104 are provided 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 and extend along the axial direction of the precast concrete exhaust pipe section 10. The concrete ribs 104 help to enhance the overall strength of the precast concrete exhaust pipe section 10.

[0080] In addition, each precast concrete exhaust pipe section 10 has multiple exhaust duct embedded parts 105. One end of the exhaust duct embedded part 105 is embedded inside the precast concrete exhaust pipe section 10 and connected and fixed with the metal reinforcing hoop. The other end of the exhaust duct embedded part 105 passes through the concrete protruding 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, reference is made to Figure 3 and Figure 10Cement-based grout 14 or non-shrink grout is injected between the precast concrete exhaust pipe section 10 and the building exterior wall 2. The cement-based grout 14 or non-shrink grout seals the gap between the precast concrete exhaust pipe section 10 and the building exterior wall 2, thus ensuring that the appearance of the precast concrete exhaust pipe section 10 is consistent 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 injection of cement-based grout 14 or non-shrink grout into the gap between the precast concrete exhaust pipe section 10 and the building exterior wall 2.

[0082] In one embodiment, reference is made to Figure 2 and Figure 9 The bottom surface of the precast concrete exhaust pipe section 10 is provided with a metal tenon 102, and the top surface of the precast concrete exhaust pipe section 10 is provided with a metal groove 103. The metal groove 103 is located around the connecting steel sleeve 101, and the metal groove 103 is filled with building sealant 12. In any two precast concrete exhaust pipe sections 10, the metal tenon 102 on one precast concrete exhaust pipe section 10 is inserted into the metal groove 103 on the other precast concrete exhaust pipe section 10. Therefore, during the connection of two precast concrete exhaust pipe sections 10, the insertion and engagement of the metal tenon 102 and the metal groove 103 can further improve the connection performance of the two precast concrete exhaust pipe sections 10.

[0083] In addition, filling the metal groove 103 with building sealant 12 can achieve a sealing performance at the connection of the two precast concrete exhaust pipe sections 10, thus preventing smoke leakage.

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

[0085] In one embodiment, reference is made to Figure 3 and Figure 9 Polymer mortar 13 is injected into the gap at the connection of the two precast concrete exhaust pipe sections 10. The polymer mortar 13 seals the gap at the connection of the two precast concrete exhaust pipe sections 10, which can further prevent smoke leakage at the connection of the two precast concrete exhaust pipe sections 10.

[0086] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A prefabricated exterior exhaust system for residential buildings, characterized in that, The system includes an external exhaust duct that connects to the exhaust outlets on each floor and extends vertically along the building's exterior wall. The exhaust duct comprises multiple precast concrete exhaust pipe sections, the upper part of which is connected and fixed to the building's exterior wall by welding and / or fasteners. A connecting steel sleeve coaxially mounted on the top of each precast concrete exhaust pipe section is provided, and a metal reinforcing hoop is provided at the lower end of the inner wall of the precast concrete exhaust pipe section or at the lower end between the inner and outer walls. The metal reinforcing hoop is coaxially mounted with the precast concrete exhaust pipe section, and the outer wall of the connecting steel sleeve on one precast concrete exhaust pipe section is fitted and locked to the position of the corresponding metal reinforcing hoop in another precast concrete exhaust pipe section.

2. The residential external prefabricated exhaust duct system according to claim 1, characterized in that, The fastener is a chemical anchor, expansion bolt, or through bolt. A through hole is provided on the upper part of the wall surface where the precast concrete exhaust pipe section connects to the building's exterior wall. A connection hole is provided on the building's exterior wall. The fastener passes through the through hole from the precast concrete exhaust pipe section and is connected and fixed to the connection hole.

3. The residential external prefabricated exhaust duct system according to claim 1 or 2, characterized in that, An exhaust duct embedded part is provided on the wall surface where the precast concrete exhaust pipe section connects to the building's exterior wall, and an exterior wall embedded part welded to the exhaust duct embedded part is pre-embedded in the building's exterior wall.

4. The residential external prefabricated 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 fastened to the inner cavity of the other precast concrete exhaust pipe section by a tapered fit.

5. The residential external prefabricated exhaust duct system according to claim 1, characterized in that, The bottom of the inner cavity of the precast concrete exhaust pipe section is provided with multiple self-locking structures distributed along its circumference. The outer wall of the connecting steel sleeve is provided with multiple locking holes along its own circumference. The multiple locking holes correspond one-to-one with the multiple self-locking structures. Each locking structure cooperates with each locking hole to lock the connecting steel sleeve on one of the precast concrete exhaust pipe sections to another precast concrete exhaust pipe section.

6. The residential external prefabricated 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 formed on the inner wall of the precast concrete exhaust pipe section and 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 along the inside of 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 lock in place with the locking hole.

7. The residential external prefabricated 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 prefabricated exhaust duct system according to claim 1, characterized in that, Two concrete ribs are provided on the wall surface of the precast concrete exhaust pipe section facing the building exterior wall, and the concrete ribs extend along the axial direction of the precast concrete exhaust pipe section.

9. The residential external prefabricated exhaust duct system according to claim 1 or 8, characterized in that, The precast concrete exhaust pipe section is filled with cement-based grout or non-shrink grout between itself and the building exterior wall, and the cement-based grout or non-shrink grout seals the gap between the precast concrete exhaust pipe section and the building exterior wall.

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

Images