Novel sleeve type chimney structure

Abstract

The novel sleeve type chimney structure comprises an outer barrel and an inner barrel, a flue connector penetrating out of the side wall of the outer barrel is arranged at the bottom of the inner barrel, a supporting mechanism used for supporting the bottom of the inner barrel is arranged on the lower portion of the outer barrel, and anti-collision mechanisms used for preventing the inner barrel from shaking are arranged on the middle portion and the upper portion of the inner barrel. The supporting mechanism comprises a supporting platform arranged below the inner barrel and a base welded to the bottom of the inner barrel, the supporting platform is fixed to the inner wall of the outer barrel, a protruding shaft coaxial with the center of the inner barrel is welded to the bottom of the base, a spherical end face is arranged at the bottom of the protruding shaft, and an annular base matched with the spherical end face is arranged in the center of the supporting platform. The convex shaft with the spherical end face is arranged at the bottom of the inner cylinder and matched with the annular seat arranged on the supporting platform of the outer cylinder, when the inner cylinder deforms along with the outer cylinder, no bending moment stress is generated at the bottom, stress fatigue is avoided, safety is higher, materials are saved, consumption is reduced, and meanwhile the bearing load of the outer cylinder is reduced.

Description

Technical Field

[0001] The utility model relates to a chimney structure, in particular to a novel sleeve type chimney structure. Background Art

[0002] Chimneys are essential equipment for industrial production processes, and their form varies with different processes. Sleeve-type steel chimneys are safer because the structural outer tube and the process inner tube are completely separated. Especially when used for the discharge of highly corrosive flue gases, they are one of the main product choices.

[0003] But relatively speaking, the structure of sleeve-type chimney is also more complicated. The outer tube, as a structural tube, plays the role of resisting various loads, mainly wind loads, to protect the inner tube. It is fixed to the reinforced concrete foundation through flanges and anchor bolts; the inner tube is generally used as a process tube, and different materials or linings are used according to the flue gas temperature, corrosion level, etc. Its conventional fixed support form is generally fixed at the bottom to the foundation or outer tube support platform. In this way, when the outer tube is controlled by wind load to bend, deform and vibrate, although the inner tube is not directly affected by the wind load, it will have the same bending deformation as the outer tube. This is easy to generate a large bending moment at the bottom of the inner tube, affecting its life. Secondly, in order to improve safety, the wall thickness of the inner tube also needs to be appropriately increased. The inner tube is generally made of stainless steel, acid-resistant steel, or even niobium steel plate, which is expensive, so the material cost is increased invisibly. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a new sleeve type chimney structure with reasonable design, effectively improving the load action mode of the inner cylinder, and improving the product life and safety in view of the deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A new sleeve chimney structure, characterized in that it comprises an outer tube and an inner tube, the bottom of the inner tube is provided with a flue interface penetrating from the side wall of the outer tube, the outer tube is provided with a supporting mechanism matched with the bottom of the inner tube, and the middle and upper parts of the inner tube are provided with anti-collision mechanisms for preventing the inner tube from colliding with the outer tube;

[0007] The support mechanism includes a support platform arranged below the inner cylinder and a base welded to the bottom of the inner cylinder. The support platform is fixed on the inner wall of the outer cylinder. A convex shaft coaxially arranged with the center of the inner cylinder is welded at the bottom of the base. A spherical end surface is arranged at the bottom of the convex shaft. An annular seat matching the spherical end surface is arranged at the center of the support platform.

[0008] The anti-collision mechanism includes an annular connecting plate and an annular guide plate arranged along the circumference of the inner cylinder. The annular guide plate is arranged face to face with the inner wall of the outer cylinder. The annular guide plate is fixedly connected to the side wall of the inner cylinder through the annular connecting plate. A nylon plate for protecting the inner wall of the outer cylinder is provided on the surface of the annular guide plate directly facing the side wall of the outer cylinder.

[0009] The technical problem to be solved by the utility model can also be achieved through the following technical scheme, the base includes a radial reinforcement plate welded to the bottom of the inner tube, a central tube arranged at the center of the radial reinforcement plate and coaxially arranged with the inner tube, a top plate sealed at the upper end of the central tube, and a bottom plate sealed at the lower end of the central tube, and the convex shaft is arranged on the bottom plate.

[0010] The technical problem to be solved by the utility model can also be achieved through the following technical scheme: the support platform is composed of a support main beam welded on the inner wall of the outer tube and a plurality of main beam diagonal braces connected to the support main beam, the main beam diagonal braces are evenly arranged along the circumference of the outer tube, and the annular seat is arranged on the support main beam in the center of the outer tube.

[0011] The technical problem to be solved by the utility model can also be achieved through the following technical solution: the annular seat is an annular groove seat surrounded by an annular plate arranged on the supporting platform.

[0012] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a sway-stopping and limiting cross beam cooperating with the anti-collision mechanism is provided in the middle of the outer cylinder.

[0013] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a foundation flange fixed in reinforced concrete by anchor bolts is provided at the bottom of the outer tube, a plurality of stiffening ribs are provided between the foundation flange and the outer wall of the outer tube, and the stiffening ribs are evenly arranged along the outer circumference of the outer tube.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] First, the utility model changes the traditional inner cylinder support mode, that is, a convex shaft with a spherical end face is arranged at the bottom of the inner cylinder, which cooperates with the annular seat arranged on the outer cylinder support platform. When the inner cylinder deforms with the outer cylinder, no bending moment stress is generated at the bottom, thus avoiding stress fatigue and having higher safety. With the cooperation of the anti-collision mechanism, the bottom stress is reduced, the local wall thickness of the inner cylinder can be appropriately reduced, thus saving materials and reducing consumption, and also reducing the load-bearing load of the outer cylinder;

[0016] Second, the flue interface is set at the bottom of the inner tube. When the flue gas temperature changes greatly, or the flue is subjected to external wind loads to generate torsional stress, the temperature stress and torsional stress will not damage the bottom of the inner tube.

[0017] Third, the support form of the bottom of the inner tube is fully open, eliminating the possibility of bending moment or stress. The supporting end face of the bottom convex shaft is spherical, further avoiding stress caused by structural stress or processing errors. The guide and anti-collision combination is reasonably set according to the distance between the inner and outer tubes to ensure overall stability, controllability and reliability.

[0018] The novel sleeve-type chimney structure of the utility model adopts a new inner tube support structure, which effectively improves the load action mode of the inner tube and improves the product life and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the novel sleeve-type chimney structure described in the utility model;

[0020] Figure 2 for Figure 1 AA direction schematic diagram;

[0021] Figure 3 for Figure 1 BB direction schematic diagram;

[0022] Figure 4 for Figure 1 Schematic diagram of CC cross section;

[0023] Figure 5 for Figure 1 DD direction schematic diagram;

[0024] Figure 6 for Figure 1 A magnified view of point E;

[0025] Figure 7 for Figure 1 A magnified view of point F;

[0026] Figure 8 for Figure 1 Enlarged view of G.

[0027] In the figure: 1-inner tube; 2-outer tube; 3-anti-sway limit beam; 4-radial reinforcement plate; 5-supporting main beam; 6-main beam diagonal brace; 7-stiffening rib; 8-flange bolt; 9-foundation flange; 10-smoke duct interface; 11-annular reinforcement plate; 12-center tube; 13-convex shaft; 14-annular seat; 15-top plate; 16-bottom plate; 17-annular guide plate; 18-nylon plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] Reference Figure 1-8 A new type of sleeve chimney structure, comprising an outer tube 2 and an inner tube 1, wherein the bottom of the inner tube 1 is provided with a flue interface penetrating from the side wall of the outer tube 2, the outer tube 2 is provided with a supporting mechanism matched with the bottom of the inner tube, and the middle and upper parts of the inner tube 1 are provided with anti-collision mechanisms for preventing the inner tube 1 from colliding with the outer tube 2;

[0031] The support mechanism includes a support platform arranged below the inner tube 1 and a base welded to the bottom of the inner tube 1. The support platform is fixed on the inner wall of the outer tube 2. A convex shaft 13 coaxially arranged with the center of the inner tube 1 is welded at the bottom of the base. A spherical end surface is arranged at the bottom of the convex shaft 13. An annular seat 14 matching the spherical end surface is arranged at the center of the support platform.

[0032] The anti-collision mechanism includes an annular connecting plate 11 and an annular guide plate 17 arranged along the circumference of the inner cylinder 1. The annular guide plate 17 is arranged face to face with the inner wall of the outer cylinder 2. The annular guide plate 17 is fixedly connected to the side wall of the inner cylinder through the annular connecting plate 11. A nylon plate 18 for protecting the inner wall of the outer cylinder is provided on the surface of the annular guide plate 17 directly facing the side wall of the outer cylinder. The nylon plate 18 is fixed to the annular guide plate 17 by a circle of bolts. When the inner cylinder 1 is deformed with the outer cylinder 2, it supports the inner cylinder 1 to reduce damage caused by direct metal collision.

[0033] The base includes a radial reinforcement plate 4 welded to the bottom of the inner tube, a central tube 12 arranged below the radial reinforcement plate 4 and coaxially arranged with the inner tube 1, a top plate 15 sealed at the upper end of the central tube 12, and a bottom plate 16 sealed at the lower end of the central tube 12, and the convex shaft 13 is arranged on the bottom plate 16.

[0034] The support platform is composed of a support main beam 5 welded on the inner wall of the outer tube 2 and a plurality of main beam diagonal braces 6 connected to the support main beam. The support main beam 5 is arranged horizontally, and the main beam diagonal braces 6 are evenly arranged along the circumference of the outer tube. The annular seat 14 is arranged on the support main beam 5 at the center of the outer tube.

[0035] The annular seat 14 is an annular groove seat surrounded by an annular plate arranged on the supporting platform.

[0036] A sway-stopping and limiting cross beam 3 cooperating with the anti-collision mechanism is provided in the middle of the outer tube 2. When the distance between the lower inner tube and the outer tube is large, the sway-stopping and limiting cross beam 3 can be provided on the inner wall of the outer tube.

[0037] A foundation flange 9 fixed in reinforced concrete by anchor bolts is provided at the bottom of the outer tube 2 , and a plurality of stiffening ribs 7 are provided between the foundation flange 9 and the outer wall of the outer tube 2 . The stiffening ribs 7 are evenly arranged along the outer circumference of the outer tube 2 .

[0038] Compared with the conventional chimney structure, the new sleeve chimney structure described in the utility model has the following advantages: first, when the inner tube deforms with the outer tube, no bending stress is generated at the bottom, which avoids stress fatigue and is safer; second, the flue interface is generally close to the bottom of the inner tube. When the flue gas temperature changes greatly, or the flue is subjected to external wind load to generate torsional stress, the temperature stress and torsional stress will not damage the bottom of the inner tube; third, the bottom stress is reduced, and the local wall thickness of the inner tube can be appropriately reduced, saving materials and reducing consumption, while also reducing the load of the outer tube. Fourth, the support form of the bottom of the inner tube is completely open and hinged, eliminating the possibility of bending moment or stress; the support end face of the bottom support convex shaft 13 is spherical, which further avoids stress caused by structural stress or processing error; the guide and anti-collision combination is reasonably set according to the distance between the inner and outer tubes to ensure overall stability, controllability and reliability.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new sleeve chimney structure, characterized in that: It includes an outer tube and an inner tube, the bottom of the inner tube is provided with a flue interface penetrating from the side wall of the outer tube, the outer tube is provided with a supporting mechanism matched with the bottom of the inner tube, and the middle and upper parts of the inner tube are provided with anti-collision mechanisms for preventing the inner tube from colliding with the outer tube; The support mechanism includes a support platform arranged below the inner cylinder and a base welded to the bottom of the inner cylinder. The support platform is fixed on the inner wall of the outer cylinder. A convex shaft coaxially arranged with the center of the inner cylinder is welded at the bottom of the base. A spherical end surface is arranged at the bottom of the convex shaft. An annular seat matching the spherical end surface is arranged at the center of the support platform. The anti-collision mechanism includes an annular connecting plate and an annular guide plate arranged along the circumference of the inner cylinder. The annular guide plate is arranged face to face with the inner wall of the outer cylinder. The annular guide plate is fixedly connected to the side wall of the inner cylinder through the annular connecting plate. A nylon plate for protecting the inner wall of the outer cylinder is provided on the surface of the annular guide plate directly facing the side wall of the outer cylinder.

2. A novel sleeve chimney structure according to claim 1, characterized in that: The base includes a radial reinforcement plate welded to the bottom of the inner tube, a central tube arranged at the center of the radial reinforcement plate, a top plate sealed at the upper end of the central tube, and a bottom plate sealed at the lower end of the central tube, and the convex shaft is arranged on the bottom plate.

3. A novel sleeve chimney structure according to claim 1, characterized in that: The support platform is composed of a support main beam welded on the inner wall of the outer tube and a plurality of main beam diagonal braces connected to the support main beam. The main beam diagonal braces are evenly arranged along the circumference of the outer tube. The annular seat is arranged on the support main beam at the center of the outer tube.

4. A novel sleeve chimney structure according to claim 1, characterized in that: The annular seat is an annular groove seat surrounded by an annular plate arranged on the supporting platform.

5. The novel sleeve chimney structure according to claim 1 is characterized in that: A sway-stopping and limiting cross beam cooperating with the anti-collision mechanism is provided in the middle of the outer cylinder.

6. A novel sleeve chimney structure according to claim 1, characterized in that: A foundation flange fixed in reinforced concrete by anchor bolts is arranged at the bottom of the outer tube, and a plurality of stiffening ribs are arranged between the foundation flange and the outer wall of the outer tube, and the stiffening ribs are evenly arranged along the outer circumference of the outer tube.

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