A flue gas duct sealing device

Abstract

This application relates to the field of building construction technology, and in particular to a flue gas duct sealing device, which includes a cover plate, a first square tube, and a second square tube. The second square tube is hollow, and the first square tube is built into the second square tube. The cover plate is horizontally arranged. The first square tube, the second square tube, and the cover plate form a cavity for installing a flue gas duct. Two opposite sides of the first square tube are provided with elastic sealing plates. The elastic sealing plate includes a first plate body, a rotating shaft, a second plate body, and an elastic component. The first plate body is fixedly connected to the cover plate, and the second plate body is rotatably connected to the first plate body through the rotating shaft and abuts against the side wall of the flue gas duct. The elastic component is used to support the second plate body, effectively reducing the occurrence of smoke leakage and backflow of odors. This application has the characteristic of improving the durability of the flue gas duct sealing effect.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a smoke and air duct sealing device. Background Technology

[0002] As a key component of building ventilation systems, smoke ducts are often designed with a tetrahedral structure. Their sealing condition plays a crucial role in indoor air quality and living comfort. Good smoke duct sealing can effectively reduce the leakage of harmful gases, ensure fresh indoor air, and create a healthy and comfortable living environment for people.

[0003] Among the relevant technologies, the traditional methods for sealing flue gas ducts mainly include the following: First, using weather-resistant adhesive to directly fill the gaps; second, using rubber sealing rings or gaskets to achieve sealing through their elastic deformation; and third, pre-embedding expansion sealing strips to allow them to expand under certain conditions to fill the gaps. These methods were widely used in the past and were the most common flue gas duct sealing devices at that time.

[0004] Existing flue sealing devices have the following problems: they generally lack an active sealing mechanism and cannot compensate for dynamic deformations that may occur in the flue in a timely and effective manner, making it difficult to maintain the sealing effect and easily leading to problems such as smoke leakage and odor backflow, thereby affecting the quality of the indoor environment and the comfort of living. Summary of the Invention

[0005] To improve the durability of the sealing effect of the flue gas duct, this application provides a flue gas duct sealing device.

[0006] The flue gas duct sealing device provided in this application adopts the following technical solution: A flue gas duct sealing device includes a cover plate, a first square tube, and a second square tube. The second square tube is hollow, and the first square tube is built into the second square tube. The cover plate is horizontally arranged. The first square tube, the second square tube, and the cover plate enclose a cavity for installing a flue gas duct. Two opposite sides of the first square tube are provided with elastic sealing plates. The elastic sealing plate includes a first plate body, a rotating shaft, a second plate body, and an elastic component. The first plate body is fixedly connected to the cover plate. The second plate body is rotatably connected to the first plate body through the rotating shaft and abuts against the side wall of the flue gas duct. The elastic component is used to support the second plate body.

[0007] By adopting the above scheme, after the flue is installed, the elastic component pushes the second plate to rotate along the shaft until it abuts against the outer wall of the flue, forming a pressure self-regulating sealing interface. This can promptly and effectively compensate for the deformation of the flue, effectively reduce the occurrence of flue gas leakage and backflow, and improve the durability of the flue's sealing effect.

[0008] Preferably, the elastic component includes at least one torsion spring, one end of which is fixedly connected to the cover plate and the other end of which is fixedly connected to the second plate.

[0009] By adopting the above scheme, the elastic deformation of the torsion spring provides constant pressure to the second plate, so that the second plate is always in close contact with the side wall of the flue, and the sealing effect can be maintained even if the flue vibrates or slightly displaces.

[0010] Preferably, the contact surface between the second plate and the flue is provided with a weather-resistant adhesive layer.

[0011] By adopting the above solution, the weather-resistant adhesive layer adapts to the changes in the contact surface gaps caused by the thermal expansion and contraction of the flue through elastic deformation, and can still maintain adhesion in high-temperature environments, reducing the occurrence of sealing failure due to thermal stress.

[0012] Preferably, the cavity formed by the first square tube, the second square tube, and the cover plate is configured as an elastic sealant groove, and the elastic sealant groove is filled with an elastic sealing material.

[0013] By adopting the above solution, the elastic sealant groove can automatically fill the gaps caused by unevenness or damage at the top and bottom of the flue during the installation of the flue, while improving its resistance to oil fumes.

[0014] Preferably, it also includes a support rod, which abuts against the inner wall of the elastic clay groove and the second plate.

[0015] By adopting the above scheme, the support rod is responsible for supporting the elastic component before the flue is in place, so that the second plate remains open to facilitate the installation of the flue.

[0016] Preferably, the support rod is configured as a circular column, and the connection between the end face of the support rod and the curved surface is rounded.

[0017] By adopting the above scheme, the circular cross-section of the support rod ensures a uniform distribution of contact pressure on the support surface, and the rounded treatment reduces the risk of the support rod scratching the inner wall of the elastic mortar groove and the surface of the second plate.

[0018] Preferably, the support rod is configured as a breakable support member, which is broken under force during the installation of the flue gas duct to release the elastic force of the elastic component and allow the second plate to fit against the side wall of the flue gas duct.

[0019] By adopting the above scheme, the torsion spring in the elastic component instantly releases the stored elastic potential energy, and the second plate quickly and automatically adheres to the side wall of the flue under the elastic deformation pressure of the torsion spring after the lack of support rod on one side.

[0020] Preferably, the support rod has a pre-defined weak area along its length, and the cross-sectional thickness of the weak area is less than the cross-sectional thickness of the rest of the support rod.

[0021] By adopting the above scheme, stress is concentrated in the weak area of ​​the support rod, making the support rod more likely to break and thus release the physical constraint on the second plate.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. After the flue is installed, the elastic component pushes the second plate to rotate along the shaft until it abuts against the outer wall of the flue, forming a pressure self-regulating sealing interface. This can promptly and effectively compensate for the shape deformation of the flue, effectively reduce the occurrence of flue gas leakage and backflow, and improve the durability of the flue's sealing effect. 2. Improved the device's tolerance and connection stability under extreme environments; 3. It improves the convenience of the device and reduces human intervention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram illustrating a usage scenario of an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the overall structure of the elastic sealing plate according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Cover plate; 2. First square tube; 21. Elastic putty groove; 3. Elastic sealing plate; 31. First plate; 32. Rotating shaft; 33. Second plate; 331. Weather-resistant adhesive layer; 34. Elastic component; 341. Torsion spring; 4. Support rod; 41. Weak area; 5. Second square tube. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a flue gas duct sealing device. (Refer to...) Figure 1-3 A flue gas duct sealing device includes a cover plate 1, a first square tube 2 and a second square tube 5. The second square tube 5 is hollow, the first square tube 2 is built into the second square tube 5 and is concentric with the second square tube 5, and the cover plate 1 is horizontal. The first square tube 2, the second square tube 5 and the cover plate 1 enclose a cavity for installing a flue gas duct.

[0029] Furthermore, two opposite sides of the first square tube 2 are provided with elastic sealing plates 3. The elastic sealing plate 3 includes a first plate body 31, a rotating shaft 32, a second plate body 33, and an elastic component 34. The first plate body 31 is fixedly connected to the cover plate 1. The second plate body 33 is rotatably connected to the first plate body 31 through the rotating shaft 32 and abuts against the side wall of the flue. The elastic component 34 is used to support the second plate body 33.

[0030] Correspondingly, after the flue is installed, the elastic component 34 drives the second plate 33 through the rotating shaft 32 to achieve adaptive pressure adjustment. When the second plate 33 contacts the side wall of the flue, it automatically compensates for the installation positioning deviation, reduces the requirements for installation accuracy, and thus improves construction efficiency.

[0031] Furthermore, the elastic component 34, in conjunction with the second plate 33, achieves an active sealing design. The continuous force of the elastic component 34 forms an adaptive compensation mechanism, which can offset the gaps caused by thermal expansion and contraction or vibration displacement of the flue in real time, effectively reducing the occurrence of flue gas leakage or backflow, ensuring the sealing reliability of the device under long-term operating conditions, and improving the durability of the flue sealing effect.

[0032] Specifically, in this embodiment, the elastic component 34 includes a stainless steel compression torsion spring 341. The torsion spring 341 extends along the length of the cover plate 1. One end of the torsion spring 341 is fixedly connected to the cover plate 1, and the other end is fixedly connected to the second plate 33.

[0033] Therefore, the elastic deformation of the torsion spring 341 provides constant pressure to the second plate 33, so that the second plate 33 is always in close contact with the side wall of the flue. When the flue is heated and expands, the torsion spring 341 is compressed to absorb the deformation. When the flue is cooled and contracts, the torsion spring 341 rebounds to fill the gap.

[0034] Furthermore, the elastic coefficient of the torsion spring 341 can balance the sealing pressure and the resistance to movement, allowing the second plate 33 to flexibly adapt to the deformation of the flue.

[0035] On the other hand, the contact surface between the second plate 33 and the flue is provided with a weather-resistant adhesive layer 331. The weather-resistant adhesive layer 331 does not crack at low temperatures and does not soften or degrade at high temperatures. It can maintain elasticity and adhesion at extreme temperatures. It adapts to changes in the gaps of the contact surface of the flue through elastic deformation, reducing the occurrence of sealing failure.

[0036] Furthermore, the weather-resistant adhesive layer 331 has no corrosive effect on the sidewall of the flue and can form chemical bonds with the metal surface of the flue and improve water tightness. The weather-resistant adhesive layer 331 has the advantages of easy construction, environmental resistance and dynamic sealing ability, making it an ideal material for solving long-term sealing under complex working conditions.

[0037] Furthermore, in this embodiment, the cavity formed by the first square tube 2, the second square tube 5, and the cover plate 1 is configured as an elastic mortar groove 21. The elastic mortar groove 21 is filled with high-temperature and aging-resistant silicone material. The silicone material undergoes plastic flow under pressure, which can automatically fill the gaps caused by unevenness or damage at the upper and lower ends of the flue during installation. At the same time, it improves the tolerance to oil fume penetration.

[0038] Furthermore, the structure forms a dynamic buffer layer using silicone material, which absorbs the mechanical vibration of the flue gas duct through its elastic deformation. Its high temperature resistance and anti-aging properties enable it to maintain the stability of its elastic modulus under long-term thermal cycling conditions, reducing the occurrence of rigid connection failures and achieving a continuous sealing effect under pressure fluctuations.

[0039] In addition, it also includes a support rod 4. In this embodiment, the support rod 4 is arranged in a cylindrical structure. The support rod 4 abuts against the inner wall of the elastic clay groove 21 and the second plate 33. The connection between its end face and the curved surface is rounded (not shown in the figure).

[0040] In the process described above, the support rod 4 plays a positioning role before the pre-installation of the flue. By providing rigid support to one side of the second plate 33, the pressure of the support rod and the torsion spring 341 on both ends of the second plate 33 is balanced, so as to maintain the open state of the first square tube 2 and facilitate the installation of the flue by the construction personnel.

[0041] Meanwhile, the circular cross-section of the support rod 4 ensures a uniform distribution of contact pressure on the support surface, while the rounded treatment reduces the risk of scratches to the inner wall of the elastic clay groove 21 and the surface of the second plate 33 when the support rod 4 comes into contact with the surface.

[0042] Specifically, the support rod 4 uses a fragile plastic support component and has a pre-set weak area 41 along its length. The cross-sectional thickness of the weak area 41 is smaller than the cross-sectional thickness of the rest of the support rod 4.

[0043] Therefore, when the flue is in place, the weak area of ​​the support rod 4 breaks after reaching the critical load, triggering the torsion spring 341 to release the stored elastic potential energy instantaneously. At this time, the second plate 33 loses the unilateral support constraint and, under the radial pressure generated by the torsion spring 341, quickly and dynamically fits with the side wall of the flue.

[0044] The implementation principle of the flue gas duct sealing device in this application embodiment is as follows: Before the flue gas duct is installed, the support rod 4 and the torsion spring 341 apply pressure to both sides of the second plate 33 to keep it in an open state. After the flue gas duct is in place, the support rod 4 is damaged and the torsion spring 341 is released. The torsion spring 341 pushes the second plate 33 to fit tightly against the side wall of the flue gas duct. At the same time, the silicone material in the elastic putty groove 21 is pressed to fill the gap at the upper and lower ends of the flue gas duct, and the weather-resistant adhesive layer 331 on the second plate 33 is pressed to fill the contact gap of the side wall of the flue gas duct. The combined active sealing mechanism can timely and effectively compensate for the deformation of the flue gas duct caused by thermal expansion and contraction or mechanical vibration, effectively reduce the occurrence of flue gas leakage and backflow, and improve the durability of the flue gas duct sealing effect.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flue gas duct sealing device, characterized in that, The device includes a cover plate (1), a first square tube (2), and a second square tube (5). The second square tube (5) is hollow, and the first square tube (2) is built into the second square tube (5). The cover plate (1) is horizontal. The first square tube (2), the second square tube (5), and the cover plate (1) form a cavity for installing a flue. Two opposite sides of the first square tube (2) are provided with elastic sealing plates (3). The elastic sealing plate (3) includes a first plate body (31), a rotating shaft (32), a second plate body (33), and an elastic component (34). The first plate body (31) is fixedly connected to the cover plate (1). The second plate body (33) is rotatably connected to the first plate body (31) through the rotating shaft (32) and abuts against the side wall of the flue. The elastic component (34) is used to support the second plate body (33).

2. The flue gas duct sealing device according to claim 1, characterized in that, The elastic component (34) includes at least one torsion spring (341), one end of which is fixedly connected to the cover plate (1) and the other end of which is fixedly connected to the second plate (33).

3. The flue gas duct sealing device according to claim 1, characterized in that, The second plate (33) has a weather-resistant adhesive layer (331) on the contact surface with the flue.

4. The flue gas duct sealing device according to claim 1, characterized in that, The cavity formed by the first square tube (2), the second square tube (5) and the cover plate (1) is configured as an elastic mortar groove (21), and the elastic mortar groove (21) is filled with elastic sealing material.

5. A flue gas duct sealing device according to claim 4, characterized in that, It also includes a support rod (4), which abuts against the inner wall of the elastic clay groove (21) and the second plate (33).

6. A flue gas duct sealing device according to claim 5, characterized in that, The support rod (4) is configured as a circular column, and the connection between the end face of the support rod (4) and the curved surface is rounded.

7. A flue gas duct sealing device according to claim 6, characterized in that, The support rod (4) is configured as a breakable support member. The support rod (4) is broken by force during the installation of the flue gas duct to release the elastic force of the elastic component (34) so ​​that the second plate (33) fits against the side wall of the flue gas duct.

8. A flue gas duct sealing device according to claim 7, characterized in that, The support rod (4) has a pre-set weak area (41) along its length, and the cross-sectional thickness of the weak area (41) is less than the cross-sectional thickness of the rest of the support rod (4).

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