Flange connection sealing structure of multi-section chimney

Abstract

The utility model discloses a flange connection sealing structure of multistage chimney belongs to chimney manufacturing technical field. The structure includes the upper section cylinder section and lower section cylinder section of coaxial connection, and its inner wall is equipped with annular perfusion storehouse, is enclosed by the bent inner ring plate of welding in the upper section cylinder section, the annular inner ring plate of fixed in the lower section cylinder section and the inclined guide ring plate, realizes the automatic positioning of cylinder section, and the perfusion storehouse injects the high temperature -resistant sealing material through the perfusion pipe of through chimney wall. Its advantage lies in: through the dynamic compensation installation deviation and thermal deformation of flexible sealing material, combines the guide positioning and reinforcing structure, and the sealing reliability and service life are improved significantly, and the technical defects that traditional flange sealing is easy to age and leak are solved.

Description

Technical Field

[0001] This application belongs to the field of chimney manufacturing technology, and in particular relates to a flange connection sealing structure for a multi-section chimney. Background Technology

[0002] In chimney systems, traditional flange connections primarily rely on gaskets or sealing with putty on the outside of the chimney. These materials are prone to thermal aging, hardening, or cracking under long-term high temperatures and exposure to external conditions, leading to seal failure and potentially causing harmful flue gas leaks, impacting equipment safety and environmental health. Especially in multi-section chimney structures, unavoidable dimensional deviations and thermal expansion differences during installation can easily create uneven sealing gaps. Existing technologies such as fixed gaskets or cured putty are insufficient to effectively compensate for these dynamic changes, thus failing to achieve long-term stable sealing. There is an urgent need for an innovative sealing structure design that can utilize injectable flexible sealing materials to fill gaps through on-site injection, while possessing excellent deformation adaptability and high-temperature resistance to meet the long-term sealing requirements under complex operating conditions. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a flange connection sealing structure for a multi-section chimney in order to overcome the shortcomings of the prior art, and to solve at least one of the above-mentioned technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A flange connection sealing structure for a multi-section chimney includes an upper section and a lower section arranged coaxially. The outer walls of the upper section and the lower section are provided with flange connection structures for fixed connection. The inner wall of the connection between the upper section and the lower section is provided with an injection chamber for injecting sealing material.

[0006] It also includes an injection pipe, one end of which penetrates the chimney wall and communicates with the injection chamber, and the other end extends to the outside of the chimney, for injecting sealing material into the injection chamber after the upper and lower sections are connected.

[0007] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, the filling chamber includes an upper cylindrical section inner ring plate, a lower cylindrical section inner ring plate, and a guide ring plate; the upper cylindrical section inner ring plate is fixedly connected to the inner wall of the upper cylindrical section, the lower cylindrical section inner ring plate is fixedly connected to the inner wall of the lower cylindrical section, and the guide ring plate is inclined and connected to the lower cylindrical section inner ring plate to guide the upper and lower cylindrical sections to be coaxially positioned.

[0008] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, the inner ring plate of the lower cylinder section is an annular plate, which is fixedly welded to the lower edge of the inner wall of the upper port of the lower cylinder section.

[0009] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, multiple reinforcing ribs are provided between the bottom of the inner ring plate of the lower cylinder section and the inner wall of the lower cylinder section.

[0010] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, the inner ring plate of the upper cylinder section is bent, one end of which is fixedly connected to the inner wall of the upper cylinder section, and the other end abuts against the inner ring plate of the lower cylinder section; the inner ring plate of the upper cylinder section, the inner ring plate of the lower cylinder section, the inner wall of the upper cylinder section, and the inner wall of the lower cylinder section together enclose the injection chamber.

[0011] Preferably, in the multi-section chimney flange connection sealing structure of this utility model, a sealing gasket is also provided at the contact point between the inner ring plate of the upper section and the inner ring plate of the lower section.

[0012] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, the inner port of the injection pipe is connected to the top of the injection chamber, and its outer port is set higher than the inner port.

[0013] Preferably, in the multi-segment chimney flange connection sealing structure of this utility model, the outer port of the injection pipe is provided with a pipe cap.

[0014] The beneficial effects of this utility model are:

[0015] (1) By filling the injection chamber with high-temperature resistant flexible sealing material, the gap changes caused by installation deviation or thermal expansion can be actively filled, avoiding leakage problems caused by hardening and cracking of traditional gaskets.

[0016] (2) The inclined design of the guide ring plate guides the upper and lower cylinder sections to automatically align coaxially, greatly improving assembly efficiency; the pre-set compensation for manufacturing tolerances of the sealing gasket reduces installation difficulty;

[0017] (3) A reinforcing rib is added to the bottom of the inner ring plate of the lower cylinder section to resist the impact of flue gas flow and thermal stress deformation; the high-level outer port of the injection pipe is designed to prevent the backflow of sealing material and ensure that the injection chamber is fully filled;

[0018] (4) The flange connection is easy to disassemble and repair. When the seal fails, the sealing material can be injected through the injection pipe without replacing the entire sealing component. Attached Figure Description

[0019] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural cross-sectional view of an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the sealing structure (after connection) according to an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the sealing structure (unconnected) according to an embodiment of this application;

[0023] Figure 4 This is a three-dimensional external structural schematic diagram of an embodiment of this application;

[0024] The attached figures are labeled as follows:

[0025] Upper section 10, lower section 20, injection chamber 30;

[0026] Injection pipe 31, upper cylinder inner ring plate 32, lower cylinder inner ring plate 33, guide ring plate 34. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example

[0032] This embodiment provides a flange connection sealing structure for a multi-section chimney, used for sealing the joints of multiple connected chimney pipes. In large-scale industrial applications, chimneys are often designed in sections to simplify manufacturing and installation, thus requiring a reliable connection sealing solution. This embodiment illustrates the connection structure of a two-section chimney, but this structure can be extended to the connection of multiple chimney sections.

[0033] Reference Figures 1-4 Its structure includes an upper section 10 and a lower section 20 arranged coaxially. The outer walls of the upper section 10 and the lower section 20 are provided with flange connection structures to achieve detachable fixed connection. The flange connection adopts bolt fastening method to ensure that the connection is firm and easy to disassemble and maintain.

[0034] Preferably, in the multi-section chimney flange connection sealing structure of this embodiment, the inner wall of the connection between the upper section 10 and the lower section 20 is provided with an injection chamber 30 for injecting sealing material. The sealing material can be a high-temperature resistant sealant such as high-temperature resistant silicone or epoxy resin, which forms a permanent sealing layer after curing to prevent flue gas leakage.

[0035] Specifically, the injection chamber 30 includes an upper cylindrical section inner ring plate 32, a lower cylindrical section inner ring plate 33, and a guide ring plate 34. Among them, the lower cylindrical section inner ring plate 33 is an annular plate, which is fixedly welded to the lower edge of the inner wall of the upper port of the lower cylindrical section 20, and the welding adopts a continuous weld to enhance the structural strength.

[0036] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, the inner ring plate 32 of the upper cylinder section is bent, one end of which is fixedly welded to the upper edge of the inner wall of the lower port of the upper cylinder section 10, and the other end abuts against the inner ring plate 33 of the lower cylinder section. The bent design facilitates alignment during installation and withstands internal pressure.

[0037] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, multiple reinforcing ribs are provided between the bottom of the inner ring plate 33 of the lower cylinder section and the inner wall of the lower cylinder section 20. These reinforcing ribs are evenly distributed to support the ring plate and prevent deformation.

[0038] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, the inner ring plate 32 of the upper cylinder section, the inner ring plate 33 of the lower cylinder section, the inner wall of the upper cylinder section 10, and the inner wall of the lower cylinder section 20 together enclose the injection chamber 30. The chamber is an annular space with a moderate depth to ensure that the sealing material is fully filled.

[0039] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, a sealing gasket 35 is also provided at the abutment of the inner ring plate 32 of the upper section and the inner ring plate 33 of the lower section. The sealing gasket 35 is made of an elastic material such as rubber or graphite, and is used to provide a temporary seal and compensate for manufacturing tolerances before connection.

[0040] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, the guide ring plate 34 is inclined (the inclination angle with the axis is 15°-30°) and connected to the inner ring plate 33 of the lower cylinder section, which is used to guide the upper cylinder section 10 and the lower cylinder section 20 to be coaxially positioned. The inclined surface design of the guide ring plate enables the two cylinder sections to automatically align during assembly, thereby improving installation efficiency.

[0041] Preferably, the multi-section chimney flange connection sealing structure of this embodiment also includes an injection pipe 31, one end of which penetrates through the chimney wall and communicates with the injection chamber 30, and the other end extends to the outside of the chimney, for injecting sealing material into the injection chamber 30 after the upper section 10 and the lower section 20 are connected. The injection pipe is made of corrosion-resistant metal material such as stainless steel.

[0042] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, the inner port of the injection pipe 31 is connected to the top of the injection chamber 30, and its outer port is set higher than the inner port. This design can prevent the backflow of sealing material and facilitate injection from the outside.

[0043] Preferably, in the multi-segment chimney flange connection sealing structure of this embodiment, the outer end of the injection pipe 31 is provided with a pipe cap, which is threaded or snap-fit ​​type, to seal the outer end of the injection pipe and protect the inside from contamination.

[0044] Preferably, in order to prevent the sealing material from flowing out from the port joint of the upper section 10 and the lower section 20 during grouting, a sealing gasket may be placed at the joint or a sealing strip (such as tape) may be temporarily attached to the outer wall of the joint when necessary.

[0045] The assembly process for this connection and sealing structure is as follows:

[0046] A sealing gasket is installed at the joint. The upper section 10 is fitted into the guide ring plate 34 to achieve the initial positioning of the upper section 10 and the lower section 20. The flange bolts are tightened. The bent end of the inner ring plate 32 of the upper section is pressed against the inner ring plate 33 of the lower section. High-temperature resistant sealant is injected through the injection pipe 31 until the injection chamber 30 is filled. The pipe cap is then put on. After the sealant cools, the two sections of the cylinder are sealed together.

[0047] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A flange connection sealing structure for a multi-section chimney, comprising an upper section (10) and a lower section (20) coaxially arranged, wherein the outer walls of both the upper section (10) and the lower section (20) are provided with flange connection structures for fixed connection; characterized in that, The inner wall of the connection between the upper section (10) and the lower section (20) is provided with an injection chamber (30) for injecting sealing material; It also includes an injection pipe (31), one end of which penetrates the chimney wall and communicates with the injection chamber (30), and the other end extends to the outside of the chimney, for injecting sealing material into the injection chamber (30) after the upper section (10) and lower section (20) of the multi-section chimney flange connection sealing structure are connected.

2. The flange connection sealing structure for a multi-section chimney according to claim 1, characterized in that, The filling chamber (30) includes an upper cylindrical section inner ring plate (32), a lower cylindrical section inner ring plate (33), and a guide ring plate (34). The upper cylindrical section inner ring plate (32) is fixedly connected to the inner wall of the upper cylindrical section (10), the lower cylindrical section inner ring plate (33) is fixedly connected to the inner wall of the lower cylindrical section (20), and the guide ring plate (34) is inclined and connected to the lower cylindrical section inner ring plate (33) to guide the upper cylindrical section (10) and the lower cylindrical section (20) to be coaxially positioned.

3. The flange connection sealing structure for a multi-section chimney according to claim 2, characterized in that, The inner ring plate (33) of the lower cylinder section is an annular plate, which is fixedly welded to the lower edge of the inner wall of the upper port of the lower cylinder section (20).

4. The flange connection sealing structure for a multi-section chimney according to claim 3, characterized in that, Multiple reinforcing ribs are also provided between the bottom of the inner ring plate (33) of the lower cylinder section and the inner wall of the lower cylinder section (20).

5. The flange connection sealing structure for a multi-section chimney according to any one of claims 2-4, characterized in that, The inner ring plate (32) of the upper cylinder section is bent, with one end fixedly connected to the inner wall of the upper cylinder section (10) and the other end abutting against the inner ring plate (33) of the lower cylinder section. The inner ring plate (32) of the upper cylinder section, the inner ring plate (33) of the lower cylinder section, the inner wall of the upper cylinder section (10) and the inner wall of the lower cylinder section (20) together form the injection chamber (30).

6. The flange connection sealing structure for a multi-section chimney according to claim 5, characterized in that, A sealing gasket (35) is also provided at the contact point between the inner ring plate (32) of the upper cylinder section and the inner ring plate (33) of the lower cylinder section.

7. The flange connection sealing structure for a multi-section chimney according to claim 6, characterized in that, The inner port of the infusion pipe (31) is connected to the top of the infusion chamber (30), and its outer port is set higher than the inner port.

8. The flange connection sealing structure for a multi-section chimney according to claim 7, characterized in that, The outer end of the injection pipe (31) is provided with a cap.

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