Flue connecting structure for building discharge flue

Abstract

The utility model relates to a flue connecting structure for a building discharge flue, which comprises a plurality of flue units, the plurality of flue units are communicated to form a flue passage, and the flue units at the top end and the bottom end of the plurality of flue units are respectively sleeved on the outer sides of adjacent building flues. The flue units are symmetrically arranged on the outer sides of the adjacent building flues, joints between the flue units and the adjacent building flues are sealed through sealants, two outer cover units are symmetrically arranged on the outer sides of every two adjacent flue units, and the two symmetrically distributed outer cover units are fixedly connected through fasteners. And the outer cover unit is fixedly connected with the adjacent flue unit through a fastener. According to the flue connecting structure for the building discharge flue, the flue units and the outer cover unit are arranged in a matched mode, so that when the multiple flue units in the flue connecting structure for the building discharge flue are combined to form the flue passage for use, flue gas leakage between every two adjacent flue units can be reduced, the strength of the flue passage can be improved, and deformation of the flue passage can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of flue technology, specifically a flue connection structure for building exhaust ducts. Background Technology

[0002] During the construction of kitchen exhaust ducts in high-rise buildings, the strength of precast concrete exhaust ducts cannot meet the requirements for tower crane lifting. Since the standard length of construction elevators is 3 meters, the maximum length of precast concrete exhaust ducts is typically 3 meters. However, connecting two precast concrete exhaust ducts can easily cause cracking in the lower duct and create safety hazards for the upper duct's fixation. To address this, Chinese utility model patent CN220133410U proposes a precast exhaust duct connection structure and building exhaust duct. This structure uses a rectangular steel exhaust duct extending from the wall. The lower end of the rectangular steel exhaust duct is fitted around the upper end of the precast exhaust duct below it, with sealant applied between them. Similarly, the upper end of the rectangular steel exhaust duct is fitted around the lower end of the precast exhaust duct above it, with sealant applied between them, thus forming a flue passage. The materials are simple, the fabrication and installation are convenient, and it can be installed and dismantled during construction.

[0003] However, this type of prefabricated flue connection structure has the following problems: its rectangular steel flue is formed by splicing multiple flue units, and each pair of adjacent flue units is only connected by bolts, which makes it easy for flue gas to leak at the joint. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This utility model provides a flue connection structure for building smoke exhaust ducts, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flue connection structure for building exhaust ducts, comprising multiple flue units, which are interconnected to form a flue passage. The top and bottom flue units are each fitted onto the outer side of an adjacent building flue, and the joints between the flue units and adjacent building flues are sealed with sealant. The structure also includes multiple outer cover units, with two outer cover units symmetrically arranged on the outer side of every two adjacent flue units. The two symmetrically distributed outer cover units are connected and fixed together by fasteners, and the outer cover units are also connected and fixed to adjacent flue units by fasteners. The flue unit includes... A thin-walled flue has multiple spaced-apart outward protrusions on its top and bottom outer walls, and connecting pieces on its top and bottom outer walls. The outer cover unit includes a U-shaped cover with multiple spaced-apart inward protrusions on its inner wall. Flue connecting portions are formed on the top and bottom of the outer wall of the U-shaped cover. A support connecting portion is formed on the side of the U-shaped cover facing the opposite outer cover unit. The multiple inward and outward protrusions are staggered. The flue connecting portions are connected to adjacent connecting pieces by fasteners. The support connecting portions in two symmetrical outer cover units are connected by fasteners.

[0008] Preferably, the connecting piece is in close contact with the adjacent flue connection portion, and both the connecting piece and the flue connection portion have openings that are aligned with each other.

[0009] In a further preferred embodiment, the device also includes multiple support units, with support units inserted at the joints of two symmetrical outer cover units, and the support units are connected and fixed to the two adjacent outer cover units by fasteners.

[0010] In a further preferred embodiment, the support unit includes a support portion, which has a slot formed on the side facing the outer cover unit, and the support portion is inserted into the outside of the support connecting portion in two adjacent outer cover units through the slot. Both the support portion and the support connecting portion have openings that are aligned with each other. The support unit also includes a fixing portion, which is formed on the side of the support portion facing away from the outer cover unit, and openings are formed at the four corners of the fixing portion. The support unit also includes a plurality of reinforcing ribs, which are formed between the support portion and the fixing portion.

[0011] (III) Beneficial Effects

[0012] Compared with the prior art, this utility model provides a flue connection structure for building smoke exhaust ducts, which has the following beneficial effects:

[0013] In this invention, the combination of flue unit and outer cover unit in the flue connection structure for building exhaust flues allows multiple flue units to be combined to form a flue passage, thereby reducing the leakage of flue gas between two adjacent flue units and increasing the strength of the flue passage, thus reducing its deformation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flue connection structure for building smoke exhaust ducts according to the implementation plan;

[0015] Figure 2 This is a structural schematic diagram of the flue unit according to the implementation plan;

[0016] Figure 3 This is a structural schematic diagram of the outer casing unit according to the implementation plan;

[0017] Figure 4 This is a structural schematic diagram of the support unit according to the implementation plan.

[0018] In the diagram: 10. Flue unit; 11. Thin-walled flue; 12. Outer protrusion; 13. Connecting piece; 20. Outer cover unit; 21. U-shaped cover; 22. Inner protrusion; 23. Flue connection part; 24. Support connection part; 30. Support unit; 31. Bearing part; 32. Slot; 33. Fixing part; 34. Reinforcing rib. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1A flue connection structure for building exhaust ducts includes multiple flue units 10, outer cover units 20, and support units 30. The multiple flue units 10 are interconnected to form a flue passage. Two outer cover units 20 are symmetrically arranged on the outer side of every two adjacent flue units 10. The two symmetrically distributed outer cover units 20 are connected and fixed together by fasteners, and the outer cover units 20 are also connected and fixed to the adjacent flue units 10 by fasteners. The outer cover units 20 are used to reduce flue gas leakage at the joints of adjacent flue units 10. Support units 30 are inserted at the joints of the two symmetrical outer cover units 20. The end of the support unit 30 near the outer cover unit 20 is connected and fixed to the two adjacent outer cover units 20 by fasteners, and the end of the support unit 30 facing away from the outer cover unit 20 is connected and fixed to the building wall by fasteners. Among the multiple flue units 10, the top and bottom flue units 10 are each fitted on the outside of the adjacent building flue, and the joint between the flue unit 10 and the adjacent building flue is sealed with sealant, so that it is connected with the concrete flue of the building to form a complete flue passage.

[0021] See Figure 2 The flue unit 10 includes a thin-walled flue 11. Multiple spaced-apart protrusions 12 are formed on the top and bottom of the outer wall of the thin-walled flue 11. Connecting pieces 13 are also formed on the top and bottom of the outer wall of the thin-walled flue 11. The protrusions 12 and connecting pieces 13 are used to cooperate with the outer cover unit 20.

[0022] See Figure 3 The outer cover unit 20 includes a U-shaped cover 21. Multiple spaced-apart inner protrusions 22 are formed on the inner wall of the U-shaped cover 21. Flue connection portions 23 are formed at the top and bottom of the outer wall of the U-shaped cover 21, and a support connection portion 24 is formed on the side of the U-shaped cover 21 facing the opposite outer cover unit 20. When the outer cover unit 20 is assembled outside the flue unit 10, the multiple inner protrusions 22 and multiple outer protrusions 12 are staggered, and the small gaps between the multiple inner protrusions 22 and multiple outer protrusions 12 form a labyrinthine sealing structure. When flue gas passes through the narrow gaps between these two types of protrusions, the flow rate increases and the pressure decreases, creating a throttling effect. Furthermore, through the superposition of multiple tortuous channels, the pressure and leakage of the flue gas are gradually reduced, ultimately achieving a sealing effect.

[0023] When the outer cover unit 20 is fixed, the connecting piece 13 can be in close contact with the adjacent flue connection part 23. Both the connecting piece 13 and the flue connection part 23 have pre-drilled openings that are aligned with each other. Then, fasteners such as bolts can be passed through the aligned openings and tightened with nuts to complete the connection.

[0024] See Figure 4The support unit 30 includes a support portion 31, a fixing portion 33, and multiple reinforcing ribs 34. The support portion 31 has a slot 32 on the side facing the outer cover unit 20, and the support portion 31 is inserted into the outside of the support connecting portion 24 in two adjacent outer cover units 20 through the slot 32. Both the support portion 31 and the support connecting portion 24 have pre-drilled, aligned openings, allowing fasteners such as bolts to pass through these openings and be tightened with nuts to complete the connection. The fixing portion 33 is formed on the side of the support portion 31 facing away from the outer cover unit 20, and each of the four corners of the fixing portion 33 has an opening, allowing bolts to pass through these openings and be used in conjunction with pre-installed expansion bolts on the building to complete the connection and fixation. The reinforcing ribs 34 are formed between the support portion 31 and the fixing portion 33 to increase the strength of the support unit 30, enabling it to better support the flue passage.

[0025] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flue connection structure for a building exhaust duct, comprising a plurality of flue units (10), wherein the plurality of flue units (10) are connected to form a flue passage, wherein the flue unit (10) located at the top and the flue unit (10) located at the bottom are each sleeved on the outside of an adjacent building flue, and the joint between the flue unit (10) and the adjacent building flue is sealed with sealant, characterized in that, It also includes multiple outer cover units (20), with two outer cover units (20) symmetrically arranged on the outer side of every two adjacent flue units (10). The two symmetrically distributed outer cover units (20) are connected and fixed together by fasteners, and the outer cover unit (20) is also connected and fixed to the adjacent flue unit (10) by fasteners. The flue unit (10) includes a thin-walled flue (11), and the top and bottom of the outer wall of the thin-walled flue (11) are formed with a plurality of spaced-apart protrusions (12), and the top and bottom of the outer wall of the thin-walled flue (11) are also formed with connecting pieces (13). The outer cover unit (20) includes a U-shaped cover (21), on the inner wall of the U-shaped cover (21) are a plurality of spaced inner protrusions (22), and the top and bottom of the outer wall of the U-shaped cover (21) are also provided with flue connection portions (23), and a support connection portion (24) is provided on the side of the U-shaped cover (21) facing the opposite outer cover unit (20); The multiple inner protrusions (22) and multiple outer protrusions (12) are staggered, the flue connection (23) is connected to the adjacent connection piece (13) by fasteners, and the bracket connection parts (24) in the two symmetrical outer cover units (20) are connected by fasteners.

2. The flue connection structure for building smoke exhaust ducts according to claim 1, characterized in that: The connecting piece (13) is in close contact with the adjacent flue connection part (23), and openings that are aligned with each other are formed on both the connecting piece (13) and the flue connection part (23).

3. A flue connection structure for building smoke exhaust ducts according to claim 1 or 2, characterized in that: It also includes multiple support units (30), and the support units (30) are inserted at the joints of two symmetrical outer cover units (20), and the support units (30) are connected and fixed to the two adjacent outer cover units (20) by fasteners.

4. A flue connection structure for building smoke exhaust ducts according to claim 3, characterized in that: The support unit (30) includes a support portion (31), on which a slot (32) is formed on the side facing the outer cover unit (20), and the support portion (31) is inserted into the outside of the support connecting portion (24) in two adjacent outer cover units (20) through the slot (32). Openings that are aligned with each other are formed on both the support portion (31) and the support connecting portion (24).

5. A flue connection structure for building smoke exhaust ducts according to claim 4, characterized in that: The support unit (30) also includes a fixing part (33), which is formed on the side of the support part (31) facing away from the outer cover unit (20), and openings are formed at the four corners of the fixing part (33).

6. A flue connection structure for building smoke exhaust ducts according to claim 5, characterized in that: The support unit (30) also includes a number of reinforcing ribs (34), which are formed between the bearing part (31) and the fixing part (33).

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