Composite structure of smoke exhaust duct

Abstract

The utility model relates to the technical field of smoke exhaust air pipe, and disclose a composite structure's smoke exhaust air pipe, including composite smoke exhaust air pipe subassembly, the upper end of composite smoke exhaust air pipe subassembly is equipped with support mounting subassembly, through the elastic buffer and the physical protection of protection subassembly's collaborative design, realized all -round impact protection to the air pipe body, in the protection subassembly, C-shaped protection board can effectively cover the air pipe bottom and both sides key area, the external force of the first time of taking falling object or mechanical collision, cooperate the angle deflection characteristic of upper articulated rod, lower articulated rod and the elastic contraction function of buffer spring, can convert instantaneous impact force into mechanical structure's deformation force and spring's elastic potential energy, greatly weaken the impact force that transmits to the air pipe body, avoid the air pipe to appear deformation, breakage problem, guarantee the air pipe sealing performance and structural integrity, solved the pain point that traditional air pipe lacks the targeted protection and easily loses the smoke exhaust function.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust duct technology, and more specifically, to a composite structure smoke exhaust duct. Background Technology

[0002] As a core component of building fire protection systems, smoke exhaust ducts directly affect the effective ventilation of smoke and the safety of personnel evacuation during a fire. They play an irreplaceable role in densely populated and enclosed places such as high-rise buildings, commercial complexes, and underground parking garages. With the continuous improvement of fire safety standards in the construction industry, smoke exhaust ducts need to meet multiple requirements such as fire resistance, high temperature resistance, structural stability, convenient installation, and reliable protection. Composite structures, with their complementary material advantages, are gradually becoming the mainstream development direction for smoke exhaust ducts.

[0003] Existing composite smoke exhaust ducts mostly focus on the fire resistance and sealing performance of the duct body, achieving basic temperature resistance and support through the composite of inner and outer layers. However, in practical applications, the installation stability and operational protection of the ducts are often neglected. On the one hand, the installation structure of traditional ducts is mostly simple bracket welding or bolt fixing, with insufficient connection strength to the duct body. During long-term use, it is prone to loosening due to factors such as vibration and temperature changes, which not only affects the smoke exhaust efficiency but may also cause safety hazards. On the other hand, there is a lack of targeted protective structures below the duct. In environments such as underground garages and equipment rooms, the duct is easily deformed or damaged by external forces such as falling objects or mechanical collisions, directly compromising its sealing performance and structural integrity, and in severe cases, even losing its smoke exhaust function. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a composite structure smoke exhaust duct with the advantage of protection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A composite smoke exhaust duct includes a composite smoke exhaust duct assembly, wherein the upper end of the composite smoke exhaust duct assembly is provided with a bracket mounting assembly, and the lower end of the composite smoke exhaust duct assembly is provided with a protective assembly. The composite smoke exhaust duct assembly includes an inner duct, a composite metal outer duct is fixedly connected to the middle of the inner duct, and rectangular splicing rings are fixedly connected to both ends of the inner duct.

[0006] Furthermore, the bracket mounting assembly includes a connecting frame fixedly connected to the middle of the composite metal outer tube, a receiving frame fixedly connected to the upper end of the connecting frame, an mounting block fixedly connected to the upper end of the receiving frame, and a bolt wall-mounted plate fixedly connected to the upper end of the mounting block.

[0007] Furthermore, the protective assembly includes a pair of circular mounting plates, with multiple fixing blocks fixedly connected to the lower ends of the circular mounting plates. Each of the multiple fixing blocks has an upper hinge rod hinged to its lower end, and each of the multiple upper hinge rods has a lower hinge rod hinged to its lower end.

[0008] Furthermore, each of the lower hinge rods has a fixed rod hinged to its lower end, and a lower supporting circular plate is fixedly connected between the multiple fixed rods. A buffer spring is fixedly connected to the upper end of the lower supporting circular plate, and the upper end of the buffer spring is fixedly connected to the lower end of the circular mounting plate.

[0009] Furthermore, a C-shaped protective plate is fixedly connected to the lower end of the pair of lower supporting circular plates.

[0010] Furthermore, the upper ends of each of the two circular mounting plates are fixedly connected to the lower end of the composite metal outer tube.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model achieves all-round impact protection for the duct body through the coordinated design of elastic buffering and physical protection of the protective components. In the protective components, the C-shaped protective plate can effectively cover the bottom and key areas on both sides of the duct, and immediately absorb the external force generated by falling objects or mechanical collisions. Combined with the angle deflection characteristics of the upper and lower hinge rods and the elastic contraction function of the buffer spring, the instantaneous impact force can be converted into the deformation force of the mechanical structure and the elastic potential energy of the spring, which greatly weakens the impact force transmitted to the duct body, avoids the deformation and damage of the duct, ensures the sealing performance and structural integrity of the duct, and solves the pain point of traditional ducts lacking targeted protection and easily losing the smoke prevention and exhaust function.

[0012] 2. This utility model significantly improves the stability and reliability of duct installation by utilizing the multi-level load-bearing structure of the bracket installation components. The integrated installation system, consisting of the connecting frame, the supporting frame, the mounting block, and the bolt wall-mounted plate, can evenly transfer the weight of the duct to the building wall. Compared with the traditional simple bracket fixing method, it has higher load-bearing strength. At the same time, this structure can effectively disperse the stress caused by the vibration generated by the fan operation and the temperature change, avoiding loosening of the installation nodes and ensuring that the duct maintains a stable installation state for a long time. This not only ensures the smoothness of the smoke exhaust channel and improves the smoke exhaust efficiency, but also reduces the safety hazards caused by loose installation. It is suitable for the use needs of complex environments such as high-rise buildings and underground garages. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model.

[0015] Figure 3This is a schematic diagram of the disassembled structure of the bracket mounting assembly of this utility model.

[0016] Figure 4 This is a cross-sectional view of the composite metal outer tube of this utility model.

[0017] Figure 5 This is a schematic diagram of the overall structure of the protective component of this utility model.

[0018] In the diagram: 1. Composite smoke exhaust duct assembly; 2. Bracket mounting assembly; 3. Protective assembly; 101. Inner duct; 102. Rectangular splicing ring; 103. Composite metal outer duct; 201. Connecting frame; 202. Support frame; 203. Mounting block; 204. Bolted wall-mounted plate; 301. Circular mounting plate; 302. Fixing block; 303. Upper hinge rod; 304. Lower hinge rod; 305. Fixing rod; 306. Lower support circular plate; 307. Buffer spring. Detailed Implementation

[0019] like Figures 1 to 5 As shown, this utility model provides a composite smoke exhaust duct, including a composite smoke exhaust duct assembly 1. The upper end of the composite smoke exhaust duct assembly 1 is provided with a bracket mounting assembly 2, and the lower end of the composite smoke exhaust duct assembly 1 is provided with a protective assembly 3. The composite smoke exhaust duct assembly 1 includes an inner duct 101, a composite metal outer duct 103 is fixedly connected to the middle of the inner duct 101, and rectangular splicing rings 102 are fixedly connected to both ends of the inner duct 101. The inner duct 101 provides a high-temperature fireproof foundation, the composite metal outer duct 103 strengthens the structural support, and the rectangular splicing rings 102 ensure the splicing seal. The three work together to ensure that the composite smoke exhaust duct assembly 1 not only meets the temperature resistance requirements during a fire, but also has good structural stability and splicing convenience, effectively reducing the air leakage rate.

[0020] The bracket installation assembly 2 is constructed through a multi-level load-bearing system consisting of a connecting frame 201 fixedly connected to the middle of the composite metal outer tube 103, a support frame 202 at the upper end of the connecting frame 201, an installation block 203 at the upper end of the support frame 202, and a bolted wall-mounted plate 204 at the upper end of the installation block 203. The connecting frame 201 achieves a stable connection with the duct body, the support frame 202 transmits the load, the installation block 203 provides a transition connection, and the bolted wall-mounted plate 204 ensures reliable fixation to the building structure. Ultimately, this results in a uniform distribution of the duct weight, resistance to vibration and temperature stress, prevention of loosening of installation nodes, and improvement of the overall stability of the duct installation.

[0021] A deformable force transmission structure is constructed for the protective component 3 through a pair of circular mounting plates 301, multiple fixing blocks 302 at the lower end of the circular mounting plates 301, an upper hinge rod 303 hinged to the lower end of the fixing blocks 302, and a lower hinge rod 304 hinged to the lower end of the upper hinge rod 303. The circular mounting plates 301 serve as the connection base between the protective component 3 and the duct, the fixing blocks 302 provide hinge support points, and the upper hinge rod 303 and lower hinge rod 304 can flexibly deflect, generating a buffer base that converts external impact into mechanical deformation, providing structural conditions for weakening subsequent impact forces.

[0022] The buffering function of the protective component 3 is improved by the fixed rod 305 hinged to the lower end of the lower hinge rod 304, the lower supporting circular plate 306 connected between the fixed rods 305, and the buffer spring 307 between the lower supporting circular plate 306 and the circular mounting plate 301. The fixed rod 305 connects the lower supporting circular plate 306 and the lower hinge rod 304 as a whole. The buffer spring 307 absorbs the impact force through elastic contraction, generating a dual buffering effect of mechanical structure and elastic element, which greatly reduces the impact force transmitted to the duct body and avoids deformation and damage to the duct.

[0023] By fixing C-shaped protective plates to the lower ends of a pair of supporting circular plates 306, the C-shaped structure and high-strength alloy material create an effect that expands the protection range and enhances physical resistance. The C-shaped structure can cover the bottom and critical areas of the duct, increasing the protection area by 40% compared to a flat protective structure. It can immediately absorb impacts from falling objects or mechanical collisions from different directions, preventing external forces from directly acting on the duct body and providing a preliminary protective guarantee for the buffer structure to function.

[0024] By welding the upper ends of a pair of circular mounting plates 301 to the lower ends of the composite metal outer tube 103, the high-strength connection of the weld is utilized to create a stable connection between the protective component 3 and the duct body. This connection method ensures that the protective component 3 does not shift relative to the duct when subjected to external impact, making the impact force transmission path stable and reliable. Simultaneously, the fire-retardant sealant filling in the welding area balances connection strength and fire-resistant sealing performance, preventing high-temperature smoke leakage.

[0025] By using the concave-convex mating splicing surface of the rectangular splicing ring 102 and the pre-set sealing strip on the inner side, the concave-convex structure achieves rapid positioning when splicing adjacent air ducts. After the bolts are tightened, the sealing strip is squeezed and deformed to fill the gap, resulting in improved splicing efficiency and sealing performance. Compared with traditional flange connections, this ensures the smoke exhaust efficiency and reliability of the smoke exhaust system.

[0026] Working principle and usage process of this utility model: First, determine the duct installation location according to the building design requirements. Then, fix the bolt wall-mounted plate 204 in the bracket installation assembly 2 to the building wall or floor slab with expansion bolts to ensure that the bolt wall-mounted plate 204 is installed firmly without loosening. Then, fix the composite metal outer pipe 103 of the composite smoke exhaust duct assembly 1 to the connecting frame 201 with bolts to complete the duct suspension installation. During the installation process, the duct level can be calibrated by adjusting the position of the receiving frame 202.

[0027] During the splicing and sealing stage: adjacent air ducts are positioned and connected by the concave and convex structure of the rectangular splicing ring 102. After the connection is completed, the two rectangular splicing rings 102 are tightened with bolts. At this time, the sealing strip on the inner side of the splicing ring is squeezed and deformed to fill the splicing gap and achieve a sealing effect. After the splicing is completed, the splicing point and the bolt connection of the bracket installation are inspected to ensure that there is no loosening or poor sealing.

[0028] During the protective operation phase: In daily operation, the protective component 3 is in standby mode. When an object falls or a mechanical collision occurs on the C-shaped protective plate, the lower supporting circular plate 306 is subjected to force and moves downward, causing the lower hinge rod 304 and the upper hinge rod 303 to rotate around the hinge point. The buffer spring 307 is compressed and generates a reverse elastic force, which gradually absorbs and dissipates the impact force, preventing the impact force from being transmitted to the duct body. In the event of a fire, the inner duct 101 blocks the high-temperature smoke, the composite metal outer duct 103 maintains structural stability, and the bracket mounting component 2 ensures that the duct will not fall due to high temperature deformation. The protective component 3 can still play a protective role under high temperature, and works with the smoke exhaust fan to quickly exhaust the smoke, buying time for personnel evacuation.

Claims

1. A composite structure smoke exhaust duct, characterized in that: It includes a composite smoke exhaust duct assembly (1), the upper end of which is provided with a bracket mounting assembly (2), and the lower end of which is provided with a protective assembly (3). The composite smoke exhaust duct assembly (1) includes an inner duct (101), a composite metal outer duct (103) is fixedly connected to the middle of the inner duct (101), and rectangular splicing rings (102) are fixedly connected to both ends of the inner duct (101).

2. The composite structure smoke exhaust duct according to claim 1, characterized in that: The bracket mounting assembly (2) includes a connecting frame (201) fixedly connected to the middle of the composite metal outer tube (103), a receiving frame (202) fixedly connected to the upper end of the connecting frame (201), an mounting block (203) fixedly connected to the upper end of the receiving frame (202), and a bolt wall-mounted plate (204) fixedly connected to the upper end of the mounting block (203).

3. The composite structure smoke exhaust duct according to claim 1, characterized in that: The protective component (3) includes a pair of circular mounting plates (301), the lower ends of which are fixedly connected to a plurality of fixing blocks (302), the lower ends of which are all hinged to upper hinge rods (303), and the lower ends of which are all hinged to lower hinge rods (304).

4. The composite structure smoke exhaust duct according to claim 3, characterized in that: Each of the lower hinge rods (304) has a fixed rod (305) hinged to its lower end. A lower support circular plate (306) is fixedly connected between the multiple fixed rods (305). A buffer spring (307) is fixedly connected to the upper end of the lower support circular plate (306). The upper end of the buffer spring (307) is fixedly connected to the lower end of the circular mounting plate (301).

5. The composite structure smoke exhaust duct according to claim 4, characterized in that: A C-shaped protective plate is fixedly connected to the lower end of the pair of lower supporting circular plates (306).

6. The composite structure smoke exhaust duct according to claim 3, characterized in that: The upper ends of the pair of circular mounting plates (301) are fixedly connected to the lower end of the composite metal outer tube (103).

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