A new type of self-supporting corrugated inner tube chimney

Abstract

The present invention discloses a novel self-supporting corrugated inner tube chimney, comprising an outer tube and a corrugated inner tube, wherein the corrugated inner tube is welded to the inner wall surface of the outer tube, a lower flange is welded at one end of the outer tube, and an upper flange is welded at the other end of the outer tube, and a plurality of expansion joints are arranged on the surface of the corrugated inner tube, and the expansion joints are evenly distributed on the surface of the corrugated inner tube. The present invention arranges the corrugated inner tube inside the outer tube, replacing the traditional cylindrical inner barrel. Due to the elastic energy of the corrugated inner tube itself, the corrugated inner tube absorbs energy and undergoes elastic changes when heated or cooled. At the same time, an insulating cavity is arranged between the corrugated inner tube and the outer tube, thereby maintaining stability with the outer tube, preventing fractures at the welding port, and improving the safety performance of the chimney. The corrugated inner tube reduces the steel material, thereby reducing the weight of the corrugated inner tube, and improving the roundness and ring stiffness, thereby improving the safety performance of the overall structure of the chimney.

Description

Technical Field

[0001] The invention relates to the technical field of industrial chimneys, and in particular to a novel self-supporting corrugated inner tube chimney. Background Art

[0002] A chimney is a structure that provides ventilation for hot flue gases or smoke from a boiler, furnace, stove or fireplace. Chimneys are usually vertical, or as close to vertical as possible, to ensure a smooth flow of gases, drawing air into the chimney for what is known as the chimney combustion or chimney effect. The space within the chimney is called the flue. Chimneys may be found on buildings, steam locomotives and ships.

[0003] The existing industrial chimney is cylindrical. During operation, thermal expansion and contraction may cause the weld between the inner barrel and the outer barrel to break, posing certain safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a new self-supporting corrugated inner barrel chimney to solve the problem that the existing industrial chimney is cylindrical and may cause the welding joint between the inner barrel and the outer barrel to break due to thermal expansion and contraction during operation, posing certain safety hazards.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a novel self-supporting corrugated inner tube chimney, comprising an outer tube and a corrugated inner tube, the corrugated inner tube being welded to the inner wall surface of the outer tube, a lower flange being welded at one end of the outer tube, and an upper flange being welded at the other end of the outer tube, a plurality of expansion joints being arranged on the surface of the corrugated inner tube, and the expansion joints being equidistantly distributed on the surface of the corrugated inner tube.

[0006] Preferably, through holes are opened on the surface of the lower flange, and multiple through holes are equidistantly distributed along the outer ring surface of the lower flange, and reinforcement blocks are welded between adjacent through holes, the bottom end of the reinforcement block is welded to the lower flange, and one side of the reinforcement block is welded to the bottom end surface of the outer tube.

[0007] Preferably, a first fixing piece is welded to the inner wall of one end of the outer cylinder, a first fixing groove is formed at the bottom end of one side of the first fixing piece, and one end of the corrugated inner cylinder is clamped in the first fixing groove.

[0008] Preferably, a second fixing piece is welded to the inner wall of the other end of the outer cylinder, a second fixing groove is formed on one side of the second fixing piece, and the other end of the corrugated inner cylinder is clamped in the second fixing groove.

[0009] Preferably, sound insulation cotton is arranged between the corrugated inner cylinder and the outer cylinder, and a heat insulation cavity is arranged between the sound insulation cotton and the outer cylinder.

[0010] Preferably, the lower flange has the same structure as the upper flange.

[0011] Preferably, the corrugated inner cylinder is made of 1CrNiTi austenitic stainless steel.

[0012] Compared with the prior art, the present invention provides a novel self-supporting corrugated inner tube chimney, which has the following beneficial effects:

[0013] 1. The present invention welds the corrugated inner cylinder inside the outer cylinder, and strengthens the firmness of the corrugated inner cylinder inside the outer cylinder through the first fixing member and the second fixing member, and connects multiple outer cylinder threaded plates through the upper flange and the lower flange, thereby fixing and connecting multiple corrugated inner cylinders, thereby strengthening the firmness of the corrugated inner cylinder in the outer cylinder.

[0014] 2. The present invention arranges the corrugated inner tube inside the outer tube, replacing the traditional cylindrical inner barrel. The thermal stress caused by thermal expansion and contraction is released under the elastic energy of the expansion joint arranged in the corrugated inner tube. At the same time, a heat-insulating cavity is arranged between the corrugated inner tube and the outer tube, thereby maintaining stability with the outer tube, preventing fracture at the welding joint, and improving the safety performance of the chimney.

[0015] 3. The corrugated inner tube provided in the present invention reduces the steel material used, thereby reducing the weight of the corrugated inner tube, and improves the roundness and ring stiffness, thereby improving the safety performance of the overall structure of the chimney.

[0016] 4. The present invention adds sound insulation cotton between the outer cylinder and the corrugated inner cylinder. The sound insulation cotton is made of fire-proof and flame-retardant material, which effectively reduces the noise problem caused by the operation of the chimney and improves the sound insulation effect of the chimney. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the chimney proposed by the present invention;

[0019] Figure 2 A cross-sectional view of a chimney proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the chimney connection structure proposed by the present invention;

[0021] Figure 4 The present invention proposes Figure 2 A in the middle shows the enlarged picture;

[0022] Figure 5 The present invention proposes Figure 3 Middle B shows the enlarged image;

[0023] In the figure: 1. outer tube; 2. corrugated inner tube; 21. expansion joint; 3. lower flange; 31. first reinforcement block; 32. first through hole; 4. upper flange; 5. first fixing piece; 51. first fixing groove; 6. second fixing piece; 61. second fixing groove; 7. sound insulation cotton. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] See also Figure 1-5 The present invention provides a technical solution: a novel self-supporting corrugated inner tube chimney, comprising an outer tube 1 and a corrugated inner tube 2, the corrugated inner tube 2 is welded to the inner wall surface of the outer tube 1, a lower flange 3 is welded at one end of the outer tube 1, and an upper flange 4 is welded at the other end of the outer tube 1, a plurality of expansion joints 21 are arranged on the surface of the corrugated inner tube 2, and the expansion joints 21 are equidistantly distributed on the surface of the corrugated inner tube 2, the expansion joint is an elastic element with good elasticity, which is used to release the thermal stress of thermal expansion and contraction, and the deformation, elongation or shortening occurs through elastic properties, thereby effectively preventing the welding joint between the corrugated inner tube and the outer tube from breaking, thereby improving the safety performance of the chimney.

[0027] A first through hole 32 is opened on the surface of the lower flange 3, and multiple first through holes 32 are equidistantly distributed along the outer ring surface of the lower flange 3, and first reinforcement blocks 31 are welded between adjacent first through holes 32. The bottom end of the first reinforcement block 31 is welded to the lower flange 3, and one side of the first reinforcement block 31 is welded to the bottom end surface of the outer tube 1. The first reinforcement block 31 reinforces the stability between the lower flange 3 and the outer tube 1, thereby improving the strength of the lower flange 3.

[0028] A first fixing piece 5 is welded to the inner wall of one end of the outer cylinder 1, and a first fixing groove 51 is opened at the bottom end of one side of the first fixing piece 5. One end of the corrugated inner cylinder 2 is clamped with the first fixing groove 51, and the bottom end of the corrugated inner cylinder 2 is fixedly connected to the outer cylinder 1 through the first fixing piece 5. The first fixing groove 51 is used to resist the upper end of the corrugated inner cylinder 2, so that the first fixing piece 5 strengthens the stability of the corrugated inner cylinder 2 inside the outer cylinder 1.

[0029] A second fixing member 6 is welded to the inner wall of the other end of the outer cylinder 1. A second fixing groove 61 is opened on one side of the second fixing member 6. The other end of the corrugated inner cylinder 2 is clamped with the second fixing groove 61. The bottom end of the corrugated inner cylinder 2 is fixedly connected to the outer cylinder 1 through the second fixing member 6. The second fixing groove 61 is used to fix the bottom end of the corrugated inner cylinder 2, so that the second fixing member 6 strengthens the stability of the corrugated inner cylinder 2 inside the outer cylinder 1. Multiple corrugated inner cylinders 2 are fixed inside the outer cylinder 1 through the first fixing member 5 and the second fixing member 6.

[0030] Fixed together.

[0031] Sound insulation cotton 7 is arranged between the corrugated inner tube 2 and the outer tube 1. The sound insulation cotton 7 is flame retardant and made of fireproof material. An insulation cavity 8 is arranged between the sound insulation cotton 7 and the outer tube 1 to prevent the internal heat of the chimney from affecting the welding joint between the outer tube 1 and the corrugated inner tube 2, thereby enhancing the printing effect of the chimney. The width of the insulation cavity 8 is 100MM, the thickness of the sound insulation cotton 7 is 50MM, the lower flange 3 has the same structure as the upper flange 4, and the upper flange 4 and the lower flange 3 are connected by bolts of multiple outer tubes 1 through the first through hole 32 opened. Multiple outer tubes 1 are fixedly connected to form a chimney, and the material of the corrugated inner tube 2 is 1Cr18Ni9Ti austenitic stainless steel.

[0032] During installation, the second fixing member 6 is first welded to the inner wall of one end of the outer cylinder 1, and then the corrugated inner cylinder 2 is placed inside the outer cylinder 1 so that one end of the corrugated inner cylinder 2 is clamped inside the second fixing groove 61. Then, the corrugated inner cylinder 2 is welded to be firmly fixed inside the outer cylinder 1. Then, the first fixing groove 51 opened by the first fixing member 5 is clamped with the other end of the corrugated inner cylinder 2. Then, the first fixing member 5 is welded to the inner wall of the other end of the outer cylinder 1. Finally, the upper flange 4 is aligned with the lower flange 3 so that the positions of the first through holes 32 correspond. They are fixed with bolts. Multiple corrugated inner cylinders 2 are fixedly connected together inside the outer cylinder 1 through the first fixing member 5 and the second fixing member 6, thereby strengthening the stability of the corrugated inner cylinder 2 inside the outer cylinder 1.

[0033] In summary, the advantages of the present invention are:

[0034] 1. The present invention welds the corrugated inner cylinder inside the outer cylinder, and strengthens the firmness of the corrugated inner cylinder inside the outer cylinder through the first fixing member and the second fixing member, and connects multiple outer cylinder threaded plates through the upper flange and the lower flange, thereby fixing and connecting multiple corrugated inner cylinders, thereby strengthening the firmness of the corrugated inner cylinder in the outer cylinder.

[0035] 2. The present invention arranges the corrugated inner cylinder inside the outer cylinder, replacing the traditional cylindrical inner barrel. Due to the elastic energy of the corrugated inner cylinder itself, the corrugated inner cylinder absorbs energy and undergoes elastic changes when heated or cooled. At the same time, a heat-insulating cavity is arranged between the corrugated inner cylinder and the outer cylinder, thereby maintaining stability with the outer cylinder, preventing fractures at the welding joints, and improving the safety performance of the chimney.

[0036] 3. The corrugated inner tube provided in the present invention reduces the steel material used, thereby reducing the weight of the corrugated inner tube, and improves the roundness and ring stiffness, thereby improving the safety performance of the overall structure of the chimney.

[0037] 4. The present invention adds sound insulation cotton between the outer cylinder and the corrugated inner cylinder. The sound insulation cotton is made of fire-proof and flame-retardant material, which effectively reduces the noise problem caused by the operation of the chimney and improves the sound insulation effect of the chimney.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel self-supporting corrugated inner tube chimney, comprising an outer tube (1) and a corrugated inner tube (2), Features: The corrugated inner cylinder (2) is welded to the inner wall surface of the outer cylinder (1); a lower flange (3) is welded to one end of the outer cylinder (1); an upper flange (4) is welded to the other end of the outer cylinder (1); a plurality of expansion joints (21) are arranged along the entire height of the surface of the corrugated inner cylinder (2); and the expansion joints (21) are evenly distributed in the circumferential direction on the surface of the wall of the corrugated inner cylinder (2).

2. A novel self-supporting corrugated inner tube chimney according to claim 1, It is characterized by: The surface of the lower flange (3) is provided with first through holes (32), and a plurality of the first through holes (32) are evenly distributed along the outer ring surface of the lower flange (3), and first reinforcement blocks (31) are welded between adjacent first through holes (32), the bottom end of the first reinforcement block (31) is welded to the lower flange (3), and one side of the first reinforcement block (31) is welded to the bottom end surface of the outer cylinder (1).

3. A novel self-supporting corrugated inner tube chimney according to claim 1, Features: A first fixing member (5) is welded to the inner wall of one end of the outer cylinder (1), a first fixing groove (51) is provided at the bottom end of one side of the first fixing member (5), and one end of the corrugated inner cylinder (2) is clamped in the first fixing groove (51).

4. A novel self-supporting corrugated inner tube chimney according to claim 1, Features: A second fixing member (6) is welded to the inner wall of the other end of the outer cylinder (1), a second fixing groove (61) is provided on one side of the second fixing member (6), and the other end of the corrugated inner cylinder (2) is clamped in the second fixing groove (61).

5. A novel self-supporting corrugated inner tube chimney according to claim 1, Features: A sound insulation cotton (7) is arranged between the corrugated inner cylinder (2) and the outer cylinder (1), and a heat insulation cavity (8) is arranged between the sound insulation cotton (7) and the outer cylinder (1).

6. A novel self-supporting corrugated inner tube chimney according to claim 1, Features: The lower flange (3) and the upper flange (4) have the same structure.

7. A novel self-supporting corrugated inner tube chimney according to claim 1, Features: The material of the corrugated inner cylinder (2) is 1Cr18Ni9Ti austenitic stainless steel.

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