Flue anti-leakage device and boiler flue gas pipeline

Abstract

The utility model provides a flue anti-leakage device which comprises a first flue, a second flue and a flexible waterproof belt, the flexible waterproof belt is arranged at the connecting position of the first flue and the second flue, and the two side edges of the flexible waterproof belt are connected to the side walls of the first flue and the second flue in a sealed mode respectively and used for preventing condensate water from leaking out through the connecting position. According to the technical scheme, according to the flue anti-leakage device and the boiler flue gas pipeline, the flexible waterproof belt is arranged at the joint of the flue and can deform due to the fact that the flexible waterproof belt can deform along with stretching and retracting of the flue when the flue stretches and retracts along with the temperature change, and the leakage of the flue is prevented. As long as the contact position of the flexible waterproof belt and the flue is kept sealed, it can be ensured that condensate water cannot leak out from the connection position of the flue.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flue gas pipes, and in particular to a flue anti-leakage device. Background Art

[0002] During the operation of gas boilers, condensed water will be generated in the flue. The sulfur oxides formed by the combustion of sulfur in natural gas will dissolve in water to produce acidic substances. When the acidic condensed water flows in the flue, leakage often occurs at the flue joints. The condensed water leaks along the flue joints to the outside, causing pollution to the lower equipment and the ground.

[0003] Among them, patent document CN206540154 U discloses a waterproof device for the flue gas duct of a small natural gas boiler, including: a waterproof device arranged at the interface between the connected first flue gas duct and the second flue gas duct, an inner lining plate is arranged on the inner wall surface of the first flue gas duct and the second flue gas duct, and the inner lining plate is located at the interface between the first flue gas duct and the second flue gas duct, and is used to prevent condensed water from leaking through the interface.

[0004] The inner lining plate in this patent document is fixedly connected to the first flue gas duct and movably connected to the second flue gas duct. However, in the process of the flue gas duct changing in length due to periodic changes in temperature, there is a long-term relative movement between the inner lining plate and the second flue gas duct. Long-term friction causes a gap to appear between the inner lining plate and the second flue gas duct. Condensed water leaks to the outside of the flue through the gap, causing pollution to the lower equipment and the ground. In addition, the angle between the two flue gas ducts often changes with the changes in their respective lengths. Therefore, the inner lining plate cannot always maintain a tight fit with the flue gas ducts on both sides, and cannot completely prevent the leakage of condensed water. Utility Model Content

[0005] A technical problem to be solved by the present disclosure is: how to effectively prevent the leakage of condensed water at the flue connection.

[0006] In order to solve the above technical problems, an embodiment of the present disclosure provides a flue leakage prevention device, including: a first flue, a second flue and a flexible waterproof belt. The flexible waterproof belt is arranged at the connection between the first flue and the second flue. The two side edges of the flexible waterproof belt are respectively sealed and connected to the side walls of the first flue and the second flue to prevent condensation water from leaking through the connection.

[0007] In some embodiments, a flange expansion joint is provided between the first flue and the second flue. The flange expansion joint includes a first flange plate and a second flange plate. The first flange plate is fixedly connected to the first flue, and the second flange plate is fixedly connected to the second flue.

[0008] In some embodiments, the flange expansion joint includes a bellows, and the first flange is connected to the second flange via the bellows.

[0009] In some embodiments, the first chimney and the second chimney are connected with a skin.

[0010] In some embodiments, the flexible waterproof strip is made of stainless steel.

[0011] In some embodiments, the flexible waterproof tape is disposed on the outer wall surfaces of the first flue and the second flue.

[0012] In some embodiments, the flexible waterproof tape is welded to the outer wall surfaces of the first flue and the second flue.

[0013] In some embodiments, waterproof sealant is provided at welding points between the flexible waterproof tape and the first flue and the second flue.

[0014] In some embodiments, the flexible waterproof tape is screwed to the outer wall surfaces of the first flue and the second flue, and waterproof sealant is provided at the connection.

[0015] The embodiment of the present disclosure further provides a boiler flue gas duct, on which the above-mentioned flue anti-leakage device is provided.

[0016] Through the above technical solution, the flue anti-leakage device and boiler flue gas duct provided by the present invention are equipped with a flexible waterproof belt at the connection of the flue. Since the flexible waterproof belt itself can be deformed, when the flue expands and contracts with temperature changes, the flexible waterproof belt deforms along with the expansion and contraction of the flue. It is only necessary to keep the contact between the flexible waterproof belt and the flue sealed to ensure that condensed water will not leak out from the connection of the flue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 is a cross-sectional view of a flue anti-leakage device disclosed in an embodiment of the present disclosure;

[0019] Figure 2 is a partial structural cross-sectional view of a welded flexible waterproof tape disclosed in an embodiment of the present disclosure;

[0020] Figure 3 It is a partial structural cross-sectional view of the screw-connected flexible waterproof tape disclosed in an embodiment of the present disclosure;

[0021] Figure 4 It is a structural schematic diagram of the boiler flue gas duct disclosed in the embodiment of the present disclosure.

[0022] Description of reference numerals:

[0023] 1. First flue; 2. Second flue; 3. Flexible waterproof tape; 4. Skin; 5. Flange expansion joint; 51. First flange; 52. Second flange; 53. Bellows; 6. Waterproof sealant; 7. Bolts. DETAILED DESCRIPTION

[0024] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0025] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0026] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0027] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.

[0028] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0029] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] like Figure 1 and Figure 4 As shown, the present disclosure provides a flue leakage prevention device, comprising: a first flue 1, a second flue 2 and a flexible waterproof belt 3, the flexible waterproof belt 3 being arranged at the connection between the first flue 1 and the second flue 2, and both side edges of the flexible waterproof belt 3 being sealedly connected to the side walls of the first flue 1 and the second flue 2, respectively, to prevent condensed water from leaking out through the connection.

[0032] Specifically, by sealingly connecting the flexible waterproof belt 3 to the connection between the first flue 1 and the second flue 2, when the length of the first flue 1 and the second flue 2 changes, the flexible waterproof belt 3 can rely on its own deformation to adapt to the expansion and contraction of the connection, so as to ensure that no gap is generated between the flexible waterproof belt 3 and the connection, thereby preventing condensation water from leaking out through the connection between the first flue 1 and the second flue 2.

[0033] like Figures 1 to 3 As shown, in some embodiments, a flange expansion joint 5 is provided between the first flue 1 and the second flue 2. The flange expansion joint 5 includes a first flange plate 51 and a second flange plate 52. The first flange plate 51 is fixedly connected to the first flue 1, and the second flange plate 52 is fixedly connected to the second flue 2.

[0034] Specifically, the first flue 1 and the second flue 2 are connected by a flange expansion joint 5, wherein the first flange 51 is fixedly connected to the end of the first flue 1, the second flange 52 is fixedly connected to the end of the second flue 2, and the flexible waterproof tape 3 is sealed on the side walls of the first flue 1 and the second flue 2. The flexible waterproof tape 3 can cover the end of the flange expansion joint 5 fixedly connected to the flue, so that condensed water cannot leak out through the flange expansion joint 5 and contaminate the lower equipment and the ground.

[0035] like Figures 1 to 3 As shown, in some embodiments, the flange expansion joint 5 includes a bellows 53, and the first flange 51 is connected to the second flange 52 via the bellows 53. Since the bellows 53 is located between the first flange 51 and the second flange 52, when the first flue 1 and the second flue 2 are affected by temperature changes and their lengths change, the flange expansion joint 5 can rely on the elasticity of the bellows 53 to adapt to the deformation of the connection between the first flue 1 and the second flue 2, thereby narrowing the gaps between the first flange 51 and the second flange 52 and the first flue 1 and the second flue 2, respectively.

[0036] like Figures 1 to 3 As shown, in some embodiments, the first flue 1 and the second flue 2 are connected by a skin 4. The skin 4 can be arranged on the outside of the flange expansion joint 5 and connected between the first flue 1 and the second flue 2. The skin 4 is composed of multiple layers of materials such as silicone rubber cloth, fluororubber cloth, polytetrafluoroethylene cloth, and alkali-free glass fiber cloth. It is a high-strength sealing composite material that can absorb expansion, is resistant to high temperatures, acid and alkali corrosion, and can reduce noise and vibration, thereby strengthening the anti-leakage ability of the connection between the first flue 1 and the second flue 2.

[0037] In some embodiments, the flexible waterproofing strip 3 is made of stainless steel. Leveraging stainless steel's corrosion resistance, water resistance, and toughness across a wide temperature range, the flexible waterproofing strip 3 can prevent condensation from leaking out. Furthermore, the flexible waterproofing strip 3 can also deform with the expansion and contraction of the joints. Of course, the flexible waterproofing strip 3 can also be made of other materials, such as asphalt composite materials and linoleum rolls, and this disclosure is not limiting.

[0038] like Figures 1 to 4As shown, in some embodiments, the flexible waterproof tape 3 is disposed on the outer walls of the first flue 1 and the second flue 2. Specifically, when the flexible waterproof tape 3 is located on the outer walls of the first flue 1 and the second flue 2, it is convenient for staff to inspect the sealed connection between the flexible waterproof tape 3 and the flue and also facilitate the replacement of the flexible waterproof tape 3. Of course, the flexible waterproof tape 3 can also be disposed on the inner walls of the first flue 1 and the second flue 2. This arrangement prevents condensed water from contacting the flange expansion joint 5 and the skin 4, reducing corrosion to the flange expansion joint 5 and the skin 4.

[0039] like Figure 2 As shown, in some embodiments, the flexible waterproof belt 3 is welded to the outer wall surfaces of the first flue 1 and the second flue 2. Taking advantage of the fact that the flexible waterproof belt 3 is made of stainless steel, the flexible waterproof belt 3 is welded to the outer wall surfaces of the first flue 1 and the second flue 2 by means of sealing welding. The sealing welding can provide good sealing performance for the connection position between the flexible waterproof belt 3 and the flue, thereby preventing condensation water from leaking outward through the connection position between the flexible waterproof belt 3 and the flue.

[0040] like Figure 2 As shown, in some embodiments, a waterproof sealant 6 is provided at the welding point between the flexible waterproof belt 3 and the first flue 1 and the second flue 2. In order to ensure the sealing performance between the flexible waterproof belt 3 and the first flue 1 and the second flue 2, on the basis of sealing welding, the waterproof sealant 6 is applied to the connection position between the flexible waterproof belt 3 and the first flue 1 and the second flue 2 to further enhance the sealing performance of the connection position and ensure that condensed water will not leak to the outside of the flexible waterproof belt 3.

[0041] like Figure 3 As shown, in some embodiments, the flexible waterproof tape 3 is screwed to the outer wall surface of the first flue 1 and the second flue 2, and a waterproof sealant 6 is provided at the connection. In order to facilitate construction and improve the installation efficiency of the flue anti-leakage device, the flexible waterproof plate 3 is fixed to the outer wall surface of the first flue 1 and the second flue 2 using bolts 7, and then the waterproof sealant 6 is applied to the connection position between the flexible waterproof plate 3 and the first flue 1 and the second flue 2. Compared with the installation method of welding the flexible waterproof plate 3, this installation method can improve the installation efficiency and replacement efficiency of the flue anti-leakage device. Of course, the flexible waterproof plate 3 and the flue can also be connected by gluing, mortise and tenon joints, etc., as long as the sealing performance of the connection position is met. The specific installation method is not limited in this disclosure.

[0042] The present disclosure also provides a boiler flue gas duct equipped with the aforementioned flue gas leakage prevention device. A flexible waterproof tape 3 is provided at the connection between two flues. Since the flexible waterproof tape 3 is inherently deformable, when the flue gas expands and contracts with temperature changes, the flexible waterproof tape 3 deforms accordingly. Simply by keeping the connection between the flexible waterproof tape 3 and the flue gas sealed, condensed water is prevented from leaking out of the flue gas connection, thereby preventing contamination of equipment and the ground below the flue gas.

[0043] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0044] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. A flue anti-leakage device, comprising: A first flue (1), a second flue (2) and a flexible waterproof belt (3), characterized in that the flexible waterproof belt (3) is arranged at the connection between the first flue (1) and the second flue (2), and both side edges of the flexible waterproof belt (3) are respectively sealed and connected to the side walls of the first flue (1) and the second flue (2) to prevent condensed water from leaking out through the connection.

2. The flue anti-leakage device according to claim 1, characterized in that: A flange expansion joint (5) is provided between the first flue (1) and the second flue (2), and the flange expansion joint (5) comprises a first flange plate (51) and a second flange plate (52), wherein the first flange plate (51) is fixedly connected to the first flue (1), and the second flange plate (52) is fixedly connected to the second flue (2).

3. The flue anti-leakage device according to claim 2, characterized in that: The flange expansion joint (5) comprises a bellows (53), and the first flange (51) is connected to the second flange (52) via the bellows (53).

4. The flue anti-leakage device according to claim 1, characterized in that: The first flue (1) and the second flue (2) are connected with a skin (4).

5. The flue anti-leakage device according to claim 1, characterized in that: The flexible waterproof belt (3) is made of stainless steel.

6. The flue anti-leakage device according to claim 5, characterized in that: The flexible waterproof belt (3) is arranged on the outer wall surfaces of the first flue (1) and the second flue (2).

7. The flue anti-leakage device according to claim 6, characterized in that: The flexible waterproof belt (3) is welded to the outer wall surfaces of the first flue (1) and the second flue (2).

8. The flue anti-leakage device according to claim 7, characterized in that: Waterproof sealant (6) is provided at the welding points between the flexible waterproof belt (3) and the first flue (1) and the second flue (2).

9. The flue anti-leakage device according to claim 6, characterized in that: The flexible waterproof belt (3) is screwed to the outer wall surfaces of the first flue (1) and the second flue (2), and a waterproof sealant (6) is provided at the connection.

10. A boiler flue gas duct, characterized in that: The boiler flue gas duct is provided with a flue anti-leakage device according to any one of claims 1 to 9.

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