Segmented prefabricated self-standing steel chimney

Abstract

The invention belongs to the technical field of chimneys, and particularly relates to a segmented prefabricated self-standing steel chimney. Comprising a chimney cylinder body, the bottom of the chimney cylinder body is provided with an ash removal hole, the chimney cylinder body is formed by splicing multiple sections of spliced cylinder bodies, the spliced cylinder bodies are connected end to end through bolts, each spliced cylinder body is composed of an outer cylinder body and an inner cylinder body, the outer cylinder body and the inner cylinder body are connected through a plurality of connecting beams arranged at intervals, and the lower end of the inner cylinder body is fixedly connected with a shielding ring plate; a flue is formed in the lower end of the chimney barrel, a guide plate which is obliquely arranged is fixedly connected into the flue, and a plurality of chimney platforms are arranged on the chimney barrel; the problems that most existing chimneys are manufactured on site, welding rods are adopted for manual welding, splicing and welding work is conducted in a hoistway, and the welding and mounting quality is difficult to guarantee are effectively solved. The sectional type design is adopted, so that production and manufacturing are convenient, meanwhile, transportation and splicing are easy, the working difficulty is reduced to a great extent, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chimneys, and in particular relates to a self-supporting steel chimney prefabricated in sections. Background Art

[0002] With the strategic guidance of sustainable development policies such as energy conservation and environmental protection, the exhaust setting of high-rise building chimneys has been paid more and more attention. After unremitting exploration and practice by experts and scholars, civil high-rise buildings should pay attention to and have the following three basic conditions-first, the materials selected for chimneys must be stable, reliable and durable; second, the insulation of chimneys must be effective, durable and reliable; third, the installation of chimneys must be suitable for the construction of high-altitude narrow shafts. Therefore, steel chimneys are undoubtedly the first choice for civil high-rise building materials in terms of materials. It has also experienced the process of development from integral stainless steel to double-layer prefabricated steel chimneys. Integral stainless steel chimneys are more common in previous designs, but most of them are made on-site, using welding rods for manual welding, and the assembly and welding work is carried out in the shaft, and the quality of welding and installation is difficult to guarantee; due to the difference between welding rod materials and stainless steel materials, stress cracks are generated, intergranular corrosion occurs, and the sealing and stability of the cylinder are affected. The installation of its insulation is even more difficult to guarantee due to the limitation of narrow working space.

[0003] Therefore, the present application provides a segmented prefabricated self-supporting steel chimney to solve the above problems. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a self-supporting steel chimney prefabricated in sections in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-supporting steel chimney prefabricated in sections comprises a chimney body, a ash cleaning hole is arranged at the bottom of the chimney body, the chimney body is composed of a plurality of sections of spliced ​​cylinders, the spliced ​​cylinders are connected end to end by bolts, the spliced ​​cylinder is composed of an outer cylinder and an inner cylinder, the outer cylinder and the inner cylinder are connected by a plurality of spaced connecting beams, a shielding ring plate is fixedly connected to the lower end of the inner cylinder, a flue is opened at the lower end of the chimney body, an inclined guide plate is fixedly connected to the inside of the flue, and a plurality of chimney platforms are arranged on the chimney body.

[0007] In order to better realize the present invention, further optimization is made in the above structure, and the sides of the outer cylinder and the inner cylinder that are close to each other are fixedly connected with a plurality of reinforcing ring beams arranged at longitudinal intervals.

[0008] In order to better implement the present invention, further optimization is made in the above structure, and a reinforcing rib plate is welded on the connecting beam.

[0009] In order to better implement the present invention, further optimization is made in the above structure, and a stainless steel pipe is fixedly connected to the bottom of the flue.

[0010] In order to better realize the present invention, further optimization is made in the above structure, the lower end of the guide plate is fixed to the bottom of the flue by bolts, the upper end of the guide plate is fixed to the inner cylinder by bolts, and a stainless steel shell is installed between the bottom end of the guide plate and the flue and between the top end of the guide plate and the inner cylinder, and the interior of the stainless steel shell is filled with asphalt hemp.

[0011] In order to better realize the present invention, further optimization is made in the above structure. The chimney platform includes a plurality of H-shaped steels with one end fixed to the outer cylinder, a support beam is connected between the other end of the H-shaped steel and the outer cylinder, and a patterned steel plate is welded on the upper end surface of the H-shaped steel.

[0012] In order to better implement the present invention, further optimization is made in the above structure, and a railing is fixedly connected to the side of the chimney platform away from the outer cylinder.

[0013] In order to better realize the present invention, further optimization is made in the above structure, and a spirally arranged wind-breaking ring is arranged at the upper end of the chimney body.

[0014] In order to better realize the present invention, further optimization is made in the above structure, the number of the wind-breaking rings is three, and the three wind-breaking rings are evenly spaced and arranged at the upper end of the chimney body.

[0015] In order to better realize the present invention, further optimization is made in the above structure, and an escalator and a straight ladder are installed on the chimney body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The segmented prefabricated self-supporting steel chimney provided by the present invention realizes a segmented design by adding a spliced ​​cylinder, an outer cylinder, an inner cylinder, a connecting beam, a shielding ring plate, a flue and a guide plate, making it easy to produce and manufacture, and easy to transport and assemble, thereby greatly reducing the difficulty of work and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the overall installation schematic diagram of the present invention;

[0020] Figure 2 It is a cross-sectional schematic diagram of the spliced ​​cylinder in the present invention;

[0021] Figure 3 The present invention Figure 2 AA section view;

[0022] Figure 4 It is a schematic diagram of the location of the flue in the present invention;

[0023] Figure 5 The present invention Figure 4 BB section;

[0024] Figure 6 The present invention Figure 5 A partial enlarged schematic diagram in the middle;

[0025] Figure 7 The present invention Figure 5 The local enlargement of point B in the middle;

[0026] Figure 8 This is the intention of the present invention to fix the position of the connecting beam;

[0027] Fig. 9 It is a schematic diagram of the installation position of the patterned steel plate in the present invention.

[0028] In the figure: 1. Chimney body; 2. Cleaning hole; 1-1. Spliced ​​body; 1-2. Outer body; 1-3. Inner body; 4. Connecting beam; 5. Shielding ring plate; 6. Flue; 7. Guide plate; 8. Chimney platform; 9. Reinforced ring beam; 10. Reinforced rib plate; 11. Stainless steel pipe; 12. Stainless steel shell; 13. H-shaped steel; 14. Support beam; 15. Patterned steel plate; 16. Railing; 17. Wind breaking ring; 18. Escalator; 19. Straight ladder. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations 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", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference Figure 1-Figure 9 The prefabricated self-supporting steel chimney provided by the present invention comprises a chimney body 1, a cleaning hole 2 is arranged at the bottom of the chimney body 1, and the dust inside the chimney body 1 is cleaned through the cleaning hole 2. The chimney body 1 is composed of a plurality of spliced ​​cylinders 1-1, and a total of six spliced ​​cylinders 1-1 are arranged. The chimney body 1 is composed of six spliced ​​cylinders 1-1 connected end to end by bolts. Flanges are welded at both ends of the spliced ​​cylinders 1-1, and the flanges at the end of the two spliced ​​cylinders 1-1 are fixed by bolts. The spliced ​​cylinder 1-1 is composed of an outer cylinder 1-2 and an inner cylinder 1-3. The outer cylinder 1-2 and the inner cylinder 1-3 are connected by a plurality of spaced connecting beams 4. The lower end of the inner cylinder 1-3 is fixedly connected with a shielding ring plate 5. When installing, After the bottommost spliced ​​cylinder 1-1 is fixed, the bottom of another spliced ​​cylinder 1-1 is placed above the fixed spliced ​​cylinder 1-1. At this time, the shielding ring plate 5 blocks the gap between the inner cylinders 1-3 in the two spliced ​​cylinders 1-1, so that the smoke passing through the inner cylinder 1-3 will not enter between the outer cylinder 1-2 and the inner cylinder 1-3, thereby improving the sealing effect and reducing the working difficulty; a flue 6 is opened at the lower end of the chimney cylinder 1, and an inclined guide plate 7 is fixedly connected to the inside of the flue 6. The inclination angle of the guide plate 7 is set to 40°. The guide plate 7 plays a guiding role, and the smoke can more easily enter the inner cylinder 1-3 through the inclined guide plate 7. A plurality of chimney platforms 8 are arranged on the chimney cylinder 1, and the chimney platform 8 is used for maintenance, transit and rest.

[0033] The outer cylinder 1-2 and the inner cylinder 1-3 are fixedly connected on one side thereof which is close to each other with a plurality of reinforcing ring beams 9 which are arranged at intervals in the longitudinal direction, and a reinforcing rib plate 10 is welded on the connecting beam 4; the reinforcing ring beam 9 and the reinforcing rib plate 10 are arranged to improve the strength of the outer cylinder 1-2 and the inner cylinder 1-3 and improve their stability.

[0034] A stainless steel pipe 11 is fixedly connected to the bottom of the flue 6. The stainless steel pipe 11 is arranged at a position close to the bottom of the guide plate 7. When smoke enters the inner cylinder 1-3 through the flue 6, liquid is easily generated when it encounters cold. The generated liquid is guided by the guide plate 7 and enters the stainless steel pipe 11. The stainless steel pipe 11 is connected to a liquid collection device to centrally collect and process the liquid passing through the stainless steel pipe 11.

[0035] The lower end of the guide plate 7 is fixed to the bottom of the flue 6 by bolts, and the upper end of the guide plate 7 is fixed to the inner cylinder 1-3 by bolts. A stainless steel shell 12 is installed between the bottom end of the guide plate 7 and the flue 6 and between the top end of the guide plate 7 and the inner cylinder 1-3. The interior of the stainless steel shell 12 is filled with asphalt hemp fibers, and the gaps are filled with asphalt hemp fibers to prevent liquid from entering and corroding the joints.

[0036] The chimney platform 8 includes a plurality of H-shaped steels 13 with one end fixed on the outer cylinder 1-2, a support beam 14 is connected between the other end of the H-shaped steel 13 and the outer cylinder 1-2, the support beam 14 and the H-shaped steel 13 are fixed by bolts, and the support beam 14 is fixed to the lower end of the H-shaped steel 13, and the other end of the support beam 14 is fixed to the outer cylinder 1-2 by bolts, so as to provide support for the H-shaped steel 13, and a patterned steel plate 15 is welded on the upper end surface of the H-shaped steel 13, and the patterned steel plate 15 has a large friction force to prevent construction workers from slipping during construction or transfer and rest; a railing 16 is fixedly connected to the side of the chimney platform 8 away from the outer cylinder 1-2 to improve safety.

[0037] A spiral wind-breaking ring 17 is arranged at the upper end of the chimney body 1 to avoid or reduce the airflow generating Karman vortices and causing the chimney to resonate. There are three wind-breaking rings 17, and the three wind-breaking rings 17 are evenly spaced at the upper end of the chimney body 1. This arrangement improves stability.

[0038] An escalator 18 and a straight ladder 19 are installed on the chimney body 1 to facilitate climbing and maintenance.

[0039] The chimney of the present invention is a self-supporting steel chimney. The outer cylinder of the chimney is made of Q355B, and the design requires a segmented arrangement with a wall thickness of 8-16mm; the inner cylinder is made of S316L, and the wall thickness is not less than 4mm. The connection between the inner and outer cylinders adopts a limited sliding and non-rotatable structure. The chimney is prefabricated in sections in a factory, and flanges are used between the sections. The flange bolts need to be tightened. The chimney is divided into 6 sections. The design and manufacture of this chimney meet the requirements of GB / T 50051-2021 "Chimney Engineering Technical Standard". The present invention relates to the materials and structures of the inner and outer cylinders of ultra-high steel chimneys, which include the processing, manufacturing and fixing forms of the main body. In addition, it also involves some application technical data of self-supporting steel chimneys, including but not limited to vibration reduction measures for strength and deformation requirements, local stability and the application of wind breaking rings in the form of spiral plates.

[0040] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A self-supporting steel chimney prefabricated in sections, comprising a chimney body (1), wherein a ash cleaning hole (2) is arranged at the bottom of the chimney body (1), characterized in that: The chimney body (1) is composed of a plurality of spliced ​​cylinders (1-1), the spliced ​​cylinders (1-1) being connected end to end by bolts, the spliced ​​cylinder (1-1) being composed of an outer cylinder (1-2) and an inner cylinder (1-3), the outer cylinder (1-2) and the inner cylinder (1-3) being connected by a plurality of spaced connection beams (4), a shielding ring plate (5) being fixedly connected to the lower end of the inner cylinder (1-3), a flue (6) being provided at the lower end of the chimney body (1), an inclined guide plate (7) being fixedly connected to the inside of the flue (6), and a plurality of chimney platforms (8) being arranged on the chimney body (1).

2. A self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: A plurality of reinforcing ring beams (9) arranged at intervals in the longitudinal direction are fixedly connected to the adjacent sides of the outer cylinder (1-2) and the inner cylinder (1-3).

3. A self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: A reinforcing rib plate (10) is welded to the connecting beam (4).

4. A self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: A stainless steel pipe (11) is fixedly connected to the bottom of the flue (6).

5. A self-supporting steel chimney prefabricated in sections according to claim 4, characterized in that: The lower end of the guide plate (7) is fixed to the bottom of the flue (6) by bolts, and the upper end of the guide plate (7) is fixed to the inner cylinder (1-3) by bolts. A stainless steel shell (12) is installed between the bottom end of the guide plate (7) and the flue (6) and between the top end of the guide plate (7) and the inner cylinder (1-3), and the interior of the stainless steel shell (12) is filled with asphalt hemp.

6. The self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: The chimney platform (8) comprises a plurality of H-shaped steels (13) one end of which is fixed to the outer cylinder (1-2), a support beam (14) is connected between the other end of the H-shaped steel (13) and the outer cylinder (1-2), and a patterned steel plate (15) is welded to the upper end surface of the H-shaped steel (13).

7. A self-supporting steel chimney prefabricated in sections according to claim 6, characterized in that: A handrail (16) is fixedly connected to the side of the chimney platform (8) away from the outer cylinder (1-2).

8. The self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: The upper end of the chimney body (1) is provided with a spirally arranged wind-breaking ring (17).

9. A self-supporting steel chimney prefabricated in sections according to claim 8, characterized in that: The number of the wind-breaking rings (17) is three, and the three wind-breaking rings (17) are evenly spaced and arranged at the upper end of the chimney body (1).

10. The self-supporting steel chimney prefabricated in sections according to claim 1, characterized in that: An escalator (18) and a straight ladder (19) are installed on the chimney body (1).

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