A single flue structure

Abstract

The present invention relates to a single-frame flue structure, comprising a flue wall panel, a single transverse reinforcement rib, a first leg, and a sliding support. A plurality of flue wall panels are arranged around the single transverse reinforcement rib to form four flue walls of the flue structure. The single transverse reinforcement rib is composed of a bottom reinforcement rib, side reinforcement ribs, and a top reinforcement rib. The first leg is arranged on the lower side of the bottom reinforcement rib, with the lower end surface of the first leg being at the same level as the lower end surface of the side reinforcement rib. A plurality of sliding supports are respectively arranged at the lower ends of the side reinforcement rib and the first leg for connecting to a beam. The single-frame flue structure provided by the present invention can avoid cantilevering the end of the bottom reinforcement rib from being subjected to force, and force transmission is simple and clear.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structures, and in particular relates to a single-frame flue structure. Background Art

[0002] During the power generation process, coal-, gas-, or oil-fired generators in thermal power plants generate large amounts of flue gas due to the combustion of the fuel. Driven by induced draft fans (IDFs) and forced draft fans (FDFs), these flue gases pass through flue gas treatment equipment, including desulfurization, dust removal, and desulfurization. After meeting the air pollutant emission standards for thermal power plants established by international environmental protection agencies, they are discharged into the atmosphere through the chimney. With the continuous increase in domestic power demand, the number of 1000MW-class thermal power plants in China is increasing. The volume of flue gas generated by these high-power units has necessitated an ever-increasing cross-section of the flue duct structures on both sides of the chimney.

[0003] In the prior art, a Chinese patent application numbered 2013204607902 discloses an inclined flue structure, which is located between the outlet of the desulfurization reactor and the inlet of the boiler air preheater. The flue structure includes a flue with a rectangular cross section, and a plurality of transverse reinforcement ribs are arranged on the outer wall of the flue along the cross-sectional direction of the flue. A plurality of internal support rods are arranged inside the transverse reinforcement ribs, and a plurality of longitudinal reinforcement ribs are arranged on the outer wall of the flue along the direction of the flue. The invention is characterized in that a diagonal support is arranged between the transverse reinforcement ribs and the internal support rods of the flue, and the lower part of the transverse reinforcement ribs located at the bottom of the flue is fixed to the main beam by a sliding support.

[0004] Meanwhile, a Chinese patent application numbered 2008101019828 discloses an axial rail-type flue support structure, comprising a rectangular flue, a plurality of support columns spanning the axial sides of the rectangular flue, and a longitudinal support beam fixed to the top of the support column. The outer wall of the flue is provided with a reinforcement rib. Its structural characteristics are that the flue structure cross-section is extended at both ends of the bottom plane rib of the rectangular flue reinforcement rib, and sliding supports are provided below both ends of the bottom plane reinforcement rib. The sliding supports are placed on the longitudinal support beam to form a sliding surface, and a limit block is provided inside the sliding support. A circumferential reinforcement rib is first provided at the position where the flue needs to be provided with a bracket, and a plurality of sliding supports are provided below the reinforcement rib. These sliding supports are then placed on the crossbeams of the flue structure support frame structure.

[0005] The above-mentioned inclined flue structure does not describe the arrangement of the flue structure support legs and the stress characteristics, making it difficult to lift them in sections. At the same time, the above-mentioned flue axial track support structure, under the action of loads such as self-weight, wind, and earthquake, has supports set after the two ends of the flue bottom plane ribs are extended, so that the cantilever sections at the ends of the bottom plane ribs bear large vertical forces and bending moments, and the stress performance is poor, and it is inconvenient to lift them in sections. Supports are set on the inner side of the flue circumferential reinforcement ribs, so that the cantilever sections at the ends of the circumferential reinforcement ribs bear large vertical forces and bending moments, and the stress performance is poor, and it is inconvenient to lift them in sections.

[0006] Therefore, there is an urgent need to provide a single-frame flue structure with simple and clear force transmission, excellent force-bearing performance and easy lifting. Summary of the Invention

[0007] In view of the above problems, the present invention provides a single-frame flue structure, which can avoid the cantilever force on the end of the bottom reinforcement rib and has simple and clear force transmission.

[0008] A single flue structure, comprising:

[0009] Flue wall panel 1, single transverse reinforcement rib 2, first support leg 3, sliding support 4;

[0010] The plurality of flue wall panels 1 are arranged around a single transverse reinforcing rib 2 to form four flue walls of the flue structure;

[0011] The single transverse reinforcing rib 2 is composed of a bottom reinforcing rib 21, a side reinforcing rib 22 and a top reinforcing rib 23; wherein, the two side reinforcing ribs 22 are parallel and arranged vertically, and the two side reinforcing ribs 22 are connected by the bottom reinforcing rib 21 and the top reinforcing rib 23, the bottom reinforcing rib 21 is arranged below the top reinforcing rib 23, and the lower end of the side reinforcing rib 22 passes through the bottom reinforcing rib 21 and extends vertically downward;

[0012] The first leg 3 is provided on the lower side of the bottom reinforcing rib 21, and the lower end surface of the first leg 3 is at the same level as the lower end surface of the side reinforcing rib 22;

[0013] The plurality of sliding supports 4 are respectively arranged at the lower ends of the side reinforcement ribs 22 and the first legs 3 for connecting the beam.

[0014] Furthermore, an inner support rod 5 is provided inside the single transverse reinforcement rib 2 , and the inner support rod 5 is an isosceles triangle structure, and the vertex of the inner support rod 5 is connected to the midpoint of the bottom reinforcement rib 21 .

[0015] Furthermore, a second leg 9 is provided on the lower side of the bottom reinforcing rib 21, and the second leg 9 is provided at the midpoint of the bottom reinforcing rib 21;

[0016] A limit support 6 is provided at the lower end of the second leg 9 , and the limit support 6 is used to limit the position of the second leg 9 , and the limit support 6 is connected to the beam.

[0017] Furthermore, the number of the first legs 3 is an even number, and a plurality of the first legs 3 are equally arranged on both sides of the second leg 9 .

[0018] Furthermore, the sliding support 4 includes a sliding support bottom plate 41, a support cover plate 42, and a vertical limit block 43;

[0019] A vertical limit block 43 is provided on the upper surface of the sliding support bottom plate 41. The vertical limit block 43 is an L-shaped structure and is used to clamp the support cover plate 42.

[0020] The support sealing plate 42 is provided at the lower ends of the first supporting leg 3 and the side reinforcing rib 22 , and is used to support the first supporting leg 3 and the side reinforcing rib 22 .

[0021] Furthermore, the position limiting support 6 includes a position limiting support base plate 61 and a horizontal position limiting block 62;

[0022] Four horizontal limiting blocks 62 are provided on the limiting support base plate 61 . The four horizontal limiting blocks 62 are respectively arranged around the second supporting leg 9 to limit the second supporting leg 9 .

[0023] Furthermore, a sliding gasket 44 is provided on the lower side of the supporting sealing plate 42 , and the sliding gasket 44 is arranged between the supporting sealing plate 42 and the sliding support bottom plate 41 .

[0024] Furthermore,

[0025] The sliding gasket 44 is made of a polytetrafluoroethylene plate.

[0026] Furthermore, two adjacent single transverse reinforcement ribs 2 are connected by a longitudinal reinforcement rib 7 .

[0027] Furthermore, a lifting lug 8 is provided on the top of the side reinforcement rib 22 .

[0028] The present invention uses the side reinforcement ribs that extend vertically downward and serve as support legs. Under the action of loads such as deadweight, wind, and earthquake, the load effect can be directly transmitted to the supporting beam through the side reinforcement ribs, avoiding the cantilever force on the end of the bottom reinforcement rib, and the force transmission is simple and clear; by providing an even number of first support legs and one second support leg, a limiting support is provided at the bottom of the second support leg, and a sliding support leg is provided at the bottom of the first support leg, the flue structure can expand freely under the action of the flue gas temperature, reducing the temperature deformation of the flue, having excellent anti-overturning and horizontal limit performance, good force-bearing performance, and convenient segmented lifting; the present invention has a simple structure and a simple and clear force transmission path, a small amount of welding, and solves the problem of inconvenience in segmented lifting.

[0029] Other features and advantages of the present invention will be described in detail in the following description, and some of the features and advantages will become apparent from the description or be understood through implementation of the description. The objectives and other advantages of the present invention can be achieved and obtained through the structures indicated in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a single flue structure according to an embodiment of the present invention is shown;

[0032] Figure 2 A front view of a single flue structure according to an embodiment of the present invention is shown;

[0033] Figure 3 A left side view of a single flue structure according to an embodiment of the present invention is shown;

[0034] Figure 4 Show Figure 2 A partial enlarged view of point A in the middle;

[0035] Figure 5 Show Figure 4 A top view of

[0036] Figure 6 Show Figure 1 Middle BB cross-section view.

[0037] Figure markings: 1-flue wall panel; 2-single horizontal reinforcement rib, 21-bottom reinforcement rib, 22-side reinforcement rib, 23-top reinforcement rib; 3-first support leg; 4-sliding support, 41-sliding support bottom plate, 42-support sealing plate, 43-vertical limit block, 44-sliding gasket; 5-inner support rod; 6-limit support, 61-limit support bottom plate, 62-horizontal limit block; 7-longitudinal reinforcement rib; 8-lifting ear; 9-second support leg. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0039] An embodiment of the present invention introduces a single-frame flue structure, which is used to solve the problem that the existing flue structure is difficult to hoist in sections and has poor stress-bearing performance. A support is arranged on the inner side of the annular reinforcement rib of the flue, so that the cantilever section at the end of the annular reinforcement rib bears a large vertical force and bending moment.

[0040] like Figure 1-3 As shown, the embodiment of the present invention introduces a single-frame flue structure, which includes: a flue wall panel 1, a single-frame transverse reinforcement rib 2, a first support leg 3, and a sliding support 4;

[0041] The plurality of flue wall panels 1 are arranged around a single transverse reinforcing rib 2 to form four flue walls of the flue structure;

[0042] The single transverse reinforcing rib 2 is composed of a bottom reinforcing rib 21, a side reinforcing rib 22 and a top reinforcing rib 23; wherein, the two side reinforcing ribs 22 are parallel and arranged vertically, and the two side reinforcing ribs 22 are connected by the bottom reinforcing rib 21 and the top reinforcing rib 23, the bottom reinforcing rib 21 is arranged below the top reinforcing rib 23, and the lower end of the side reinforcing rib 22 passes through the bottom reinforcing rib 21 and extends vertically downward;

[0043] The first leg 3 is arranged on the lower side of the bottom reinforcing rib 21, and the lower end surface of the first leg 3 is at the same level as the lower end surface of the side reinforcing rib 22, so that the first leg 3 can be supported on the beam together with the side reinforcing rib 22. Under the action of loads such as deadweight, wind, and earthquake, the load effect is directly transmitted to the supporting beam through the side reinforcing rib 22, avoiding the cantilever force on the end of the bottom reinforcing rib 21. The force transmission is simple and clear, and it is convenient for lifting;

[0044] The plurality of sliding supports 4 are respectively arranged at the lower ends of the side reinforcement ribs 22 and the first leg 3 for connecting the beam. The first leg 3 and the side reinforcement ribs 22 are connected to the beam through the sliding supports 4. After the flue structure passes smoke, the flue wall panel 1 expands due to the heat due to the effect of the smoke temperature, and the side reinforcement ribs 22 and the first leg 3 will slide relative to the beam through the sliding supports 4.

[0045] Specifically, the flue gas flows out from the flue structure surrounded by multiple flue wall panels 1. The flue wall panels 1 are welded to a single transverse reinforcement rib 2 composed of a bottom reinforcement rib 21, a side reinforcement rib 22, and a top reinforcement rib 23. The bottom reinforcement rib 21, the side reinforcement rib 22, and the top reinforcement rib 23 can all be made of I-beams.

[0046] An inner support rod 5 is provided inside the single transverse reinforcement rib 2 . The inner support rod 5 is an isosceles triangle structure, and the vertex of the inner support rod 5 is connected to the midpoint of the bottom reinforcement rib 21 .

[0047] By setting the inner support rod 5 of the isosceles triangle structure, a stable structural system can be formed with the single transverse reinforcement rib 2, thereby improving the strength of the single transverse reinforcement rib 2, reducing the number of inner support rods 5 used, and thus reducing the flow resistance of the smoke.

[0048] The lower side of the bottom reinforcement rib 21 is provided with a second support leg 9, and the second support leg 9 is arranged at the midpoint of the bottom reinforcement rib 21;

[0049] A limit support 6 is provided at the lower end of the second leg 9 , and the limit support 6 is used to limit the position of the second leg 9 , and the limit support 6 is connected to the beam.

[0050] By arranging a second support leg 9 on the lower side of the bottom reinforcement rib 21, the second support leg 9 and the inner support rod 5 on the upper side of the bottom reinforcement rib 21 form a stable force-bearing structure, thereby improving the stability of the bottom reinforcement rib 21. At the same time, the second support leg 9 is connected to the beam through the limiting support 6, which can ensure the position of the second support leg 9. When the flue wall panel 1 expands due to heat, the second support leg 9 can be prevented from being offset, thereby reducing the degree of thermal deformation of the flue wall panel 1.

[0051] The number of the first legs 3 is an even number, and multiple first legs 3 are arranged equally on both sides of the second leg 9. The number of the first legs 3 and the second legs 9 should be arranged according to the principle of 2n+1 and n≥1, which can improve the stability of the support. It should be noted that when other objects are placed inside the flue and the left and right sections of the bottom reinforcement rib 21 are unevenly stressed, the second leg 9 can be appropriately added to the section with greater stress according to the characteristics of the stress.

[0052] like Figure 4-5 As shown, the sliding support 4 includes a sliding support base plate 41, a support cover plate 42, and a vertical limit block 43;

[0053] A vertical limit block 43 is provided on the upper surface of the sliding support bottom plate 41. The vertical limit block 43 is an L-shaped structure and is used to clamp the support cover plate 42.

[0054] The support sealing plate 42 is provided at the lower ends of the first supporting leg 3 and the side reinforcing rib 22 , and is used to support the first supporting leg 3 and the side reinforcing rib 22 .

[0055] Specifically, the sliding support bottom plate 41 is welded to the vertical limit block 43, and the vertical limit block 43 can be an L-shaped structure. The support sealing plate 42 is welded to the first leg 3 and the side reinforcement rib 22, so that the support sealing plate 42 is clamped under the vertical limit block 43, thereby limiting the support sealing plate 42 on the limit support bottom plate 61 through the vertical limit block 43, avoiding the vertical movement of the first leg 3 and the side reinforcement rib 22, thereby meeting the anti-overturning requirements of the flue structure.

[0056] like Figure 6 As shown, the limit support 6 includes a limit support base plate 61 and a horizontal limit block 62;

[0057] Four horizontal limiting blocks 62 are provided on the limiting support base plate 61 . The four horizontal limiting blocks 62 are respectively arranged around the second supporting leg 9 to limit the second supporting leg 9 .

[0058] By limiting the second leg 9 through the four horizontal limiting blocks 62 , the horizontal direction of the bottom reinforcing rib 21 can be limited, thereby meeting the horizontal limiting requirements of the flue structure.

[0059] A sliding gasket 44 is provided on the lower side of the support sealing plate 42, and the sliding gasket 44 is arranged between the support sealing plate 42 and the sliding support bottom plate 41. Through the sliding gasket 44, direct friction between the support sealing plate 42 and the sliding support bottom plate 41 can be avoided, thereby reducing noise and friction.

[0060] The sliding gasket 44 is made of polytetrafluoroethylene plate, which has extremely excellent comprehensive properties: high and low temperature resistance, corrosion resistance, weather resistance, high insulation, high lubricity, non-adhesion, non-toxicity and other excellent properties, and is very suitable for use as the sliding gasket 44.

[0061] The two adjacent single transverse reinforcement ribs 2 are connected by the longitudinal reinforcement ribs 7. When the longitudinal reinforcement ribs 7 are not used, the spacing between the two adjacent single transverse reinforcement ribs 2 is generally set to 0.6 to 1.0 m; when the longitudinal reinforcement ribs 7 are used, the spacing between the two adjacent single transverse reinforcement ribs 2 can be set to 1.0-3.0 m.

[0062] The top of the side reinforcement rib 22 is provided with a lifting lug 8 to facilitate on-site lifting.

[0063] Those skilled in the art should understand that although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single flue structure, characterized in that: The flue structure comprises: Flue wall plate (1), a single transverse reinforcing rib (2), a first supporting leg (3), and a sliding support (4); A plurality of flue wall panels (1) are arranged around a single transverse reinforcement rib (2) to form four flue walls of the flue structure; The single transverse reinforcing rib (2) is composed of a bottom reinforcing rib (21), a side reinforcing rib (22) and a top reinforcing rib (23); wherein the two side reinforcing ribs (22) are parallel and vertically arranged, the two side reinforcing ribs (22) are connected by the bottom reinforcing rib (21) and the top reinforcing rib (23), the bottom reinforcing rib (21) is arranged below the top reinforcing rib (23), and the lower end of the side reinforcing rib (22) passes through the bottom reinforcing rib (21) and extends vertically downward to the beam; The first leg (3) is arranged on the lower side of the bottom reinforcing rib (21), and the lower end surface of the first leg (3) is at the same level as the lower end surface of the side reinforcing rib (22); A plurality of sliding supports (4) are respectively arranged at the lower ends of the side reinforcement ribs (22) and the first supporting legs (3) for connecting the beam; The lower side of the bottom reinforcing rib (21) is provided with a second support leg (9), and the second support leg (9) is arranged at the midpoint of the bottom reinforcing rib (21); an inner support rod (5) is provided inside the single transverse reinforcing rib (2), and the inner support rod (5) is an isosceles triangle structure, and the vertex of the inner support rod (5) is connected to the midpoint of the bottom reinforcing rib (21); A position limiting support (6) is provided at the lower end of the second leg (9), the position limiting support (6) is used to limit the position of the second leg (9), and the position limiting support (6) is connected to the beam; The sliding support (4) comprises a sliding support bottom plate (41), a supporting cover plate (42), and a vertical limiting block (43); The upper surface of the sliding support base plate (41) is provided with the vertical limit block (43), the vertical limit block (43) is an L-shaped structure, and the vertical limit block (43) is used to clamp the support cover plate (42); The supporting sealing plate (42) is arranged at the lower ends of the first supporting leg (3) and the side reinforcing rib (22) and is used to support the first supporting leg (3) and the side reinforcing rib (22).

2. The single-frame flue structure according to claim 1, characterized in that: The number of the first legs (3) is an even number, and a plurality of the first legs (3) are arranged in equal amounts on both sides of the second leg (9).

3. The single-frame flue structure according to claim 1, characterized in that: The position-limiting support (6) comprises a position-limiting support base plate (61) and a horizontal position-limiting block (62); Four horizontal limit blocks (62) are provided on the limit support base plate (61), and the four horizontal limit blocks (62) are respectively arranged around the second leg (9) for limiting the second leg (9).

4. The single-frame flue structure according to claim 1, characterized in that: A sliding gasket (44) is provided on the lower side of the supporting sealing plate (42), and the sliding gasket (44) is arranged between the supporting sealing plate (42) and the sliding support bottom plate (41).

5. The single-frame flue structure according to claim 4, characterized in that: The sliding gasket (44) is made of a polytetrafluoroethylene plate.

6. The single-frame flue structure according to claim 1, characterized in that: Two adjacent single transverse reinforcement ribs (2) are connected via a longitudinal reinforcement rib (7).

7. The single-frame flue structure according to claim 1, characterized in that: A lifting lug (8) is provided on the top of the side reinforcement rib (22).

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