CN107795184B - Truss bearing platform structure of three-pipe sleeve type chimney - Google Patents
Truss bearing platform structure of three-pipe sleeve type chimney Download PDFInfo
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- CN107795184B CN107795184B CN201711034551.XA CN201711034551A CN107795184B CN 107795184 B CN107795184 B CN 107795184B CN 201711034551 A CN201711034551 A CN 201711034551A CN 107795184 B CN107795184 B CN 107795184B
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- 230000002265 prevention Effects 0.000 abstract description 4
- 239000011150 reinforced concrete Substances 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
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Abstract
The invention relates to a bearing platform structure of a three-tube sleeve type chimney, which comprises a chimney outer barrel, three chimney inner barrels and three main beams, wherein the three chimney inner barrels are arranged in the chimney outer barrel; one end of each main beam is connected to the inner wall of the chimney outer cylinder, the other end of each main beam is positioned at the circle center of the cross section of the chimney outer cylinder and is connected with the end parts of the other two main beams, the three main beams divide the cross section of the chimney outer cylinder into three fan-shaped areas, and each fan-shaped area is internally provided with a chimney inner cylinder; the fan-shaped area is also provided with a plurality of secondary beams which are arranged at the periphery of the inner cylinder of the chimney in a surrounding way and are connected; the main beam and/or the secondary beam are/is also connected with a shaking prevention device for maintaining the horizontal position of the inner cylinder of the chimney. Above-mentioned bearing platform structure, bearing platform girder are three truss structure's girder, and the urceolus is connected to girder one end, and the other end interconnect becomes the triangle-shaped structure, can reduce urceolus export diameter, and then reduces the reinforced concrete quantity and the bearing platform reinforcing bar quantity of urceolus, practices thrift the cost, and it is more convenient to hoist.
Description
Technical Field
The invention relates to a chimney of a thermal power plant, in particular to a truss bearing platform structure of a three-pipe sleeve type chimney.
Background
At present, a three-tube sleeve type chimney is widely applied to a thermal power plant, and the basic structure of the chimney is a chimney outer cylinder with reinforced concrete outside, three chimney inner cylinders are arranged in the outer cylinder, and a bearing platform is further arranged in the chimney outer cylinder and used for supporting the weight of the inner cylinders and maintaining the horizontal position of the inner cylinders to be stable. Generally, the bearing platform is arranged by using solid-web steel beams to penetrate through the outer cylinder of the chimney, for example, three solid-web steel beams are used as main beams, the three main beams form a triangle and surround the periphery of the inner cylinder of the chimney, the end points of the triangle are connected with the outer cylinder of the chimney, and then a plurality of secondary beams are arranged between the main beams and the outer cylinder of the chimney to fix the inner cylinder.
The above embodiment has the following problems: the main beam is distributed to form a triangle, so that the occupied area is large, the diameter of the outer cylinder is large, the required materials and construction amount are correspondingly increased, and the engineering economy is poor; the solid web type main beam has larger section size, so that a large hole needs to be formed in the wall of the outer cylinder, and the construction and the stress performance of the outer cylinder are not good; for the large-diameter sleeve chimney, the strength utilization efficiency is very low under the condition of meeting the deflection by adopting the solid web type beam, and the cost is not favorably saved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the truss bearing platform structure of the three-pipe sleeve type chimney is provided, the steel consumption of the platform can be reduced, and the cost is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the truss bearing platform structure of the three-pipe sleeve type chimney comprises a chimney outer barrel, three chimney inner barrels are arranged in the chimney outer barrel, the centers of cross sections of the three chimney inner barrels are distributed along the angular points of a regular triangle, and the truss bearing platform structure further comprises three main beams, wherein each main beam comprises an upper chord and a lower chord, a plurality of web members are connected between the upper chord and the lower chord, and a truss structure is formed; one end of each main beam is connected to the inner wall of the chimney outer cylinder, the other end of each main beam is located at the circle center of the cross section of the chimney outer cylinder and is connected with the end parts of the other two main beams, the three main beams divide the cross section of the chimney outer cylinder into three fan-shaped areas, and each fan-shaped area is provided with one chimney inner cylinder;
each sector area is also provided with a plurality of secondary beams which are arranged at the periphery of the inner cylinder of the chimney in a surrounding way and are connected with the inner cylinder of the chimney; the main beam and/or the secondary beam are/is also connected with a shaking prevention device for maintaining the horizontal position of the inner cylinder of the chimney.
Further, the setting mode that the girder is connected at chimney urceolus inner wall one end is: a lower chord at the end part of the main beam is connected with an upper chord through an inclined rod, and the upper chord is connected with a pre-embedded bolt on the inner wall of the outer barrel of the chimney; the connection mode of the main beam at the circle center of the cross section of the chimney outer barrel is as follows: the main beam is characterized by further comprising a center piece, the center piece is hexagonal prism-shaped, a through hole is formed in the axis position, and the end portion of the main beam is connected with the side face of the center piece.
Furthermore, the secondary beam forms a regular hexagonal frame which is externally tangent to the section of the chimney inner cylinder, and the chimney inner cylinder is positioned in the regular hexagonal frame.
Furthermore, the ladder stand is positioned in the fan-shaped area and surrounded by and connected with the main beam and/or the secondary beam.
The invention has the beneficial effects that: by using the bearing platform structure, the girder of the bearing platform is a main beam with three truss structures, so that the strength of steel can be fully utilized, the holes on the wall of the outer cylinder can be reduced, and the stress performance of the outer cylinder can be improved. One end of each main beam is supported on the wall of the reinforced concrete outer cylinder, the other end of each main beam is connected with the center of gravity of the section of the chimney, the section is divided into three fan-shaped areas, and the fan-shaped areas are provided with secondary beams and connected with shaking control devices for maintaining the horizontal position of the inner cylinder stable. The diameter of the outer cylinder can be reduced, so that the consumption of reinforced concrete of the outer cylinder and the consumption of steel of the bearing platform are reduced, and the cost is saved.
Drawings
FIG. 1 is a schematic top view of the load-bearing platform structure of the present invention;
FIG. 2 is a schematic front view of a main beam of the load-bearing platform structure of the present invention;
figure 3 is a schematic top view of a center piece according to the load-bearing platform structure of the present invention;
the reference numbers in the figures are: the chimney comprises a chimney outer cylinder 1, a chimney inner cylinder 2, a main beam 3, a central piece 30, an upper chord 31, a lower chord 32, a secondary beam 4, a regular hexagon frame 41 and a ladder stand 5.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
the truss bearing platform structure of the three-pipe sleeve type chimney comprises a chimney outer barrel 1, three chimney inner barrels 2 are arranged in the chimney outer barrel 1, the centers of cross sections of the three chimney inner barrels 2 are distributed along the angular points of a regular triangle, the truss bearing platform structure further comprises three main beams 3, each main beam 3 comprises an upper chord 31 and a lower chord 32, a plurality of web members are connected between the upper chord 31 and the lower chord 32, and a truss structure is formed; one end of each main beam 3 is connected to the inner wall of the chimney outer cylinder 1, the other end of each main beam 3 is located at the circle center of the cross section of the chimney outer cylinder 1 and is connected with the end parts of the other two main beams 3, the cross section of the chimney outer cylinder 1 is divided into three fan-shaped areas by the three main beams 3, and each fan-shaped area is internally provided with one chimney inner cylinder 2;
each sector area is also provided with a plurality of secondary beams 4, and the secondary beams 4 are distributed around the periphery of the chimney inner cylinder 2 and connected with the chimney inner cylinder 2; the main beam 3 and/or the secondary beam 4 are/is also connected with a shaking prevention device for maintaining the horizontal position of the chimney inner barrel 2.
The bearing platform structure is used for supporting three inner cylinders of the sleeve chimney. As shown in fig. 1, three chimney inner cylinders 2 are located in the chimney outer cylinder 1, and the centers of the cross sections of the chimney inner cylinders 2 are arranged along the angular points of regular triangles. The three main beams 3 are firstly arranged, the main beams 3 adopt a truss structure, as shown in fig. 2, each main beam 3 comprises an upper chord 31 and a lower chord 32, and a plurality of web members are connected between the upper chord 31 and the lower chord 32.
One end of the main beam 3 is connected to the inner wall of the chimney outer cylinder 1, for example, may be connected to a pre-embedded bolt on the inner wall of the chimney outer cylinder 1, preferably, an upper chord 31 of the main beam 3 is connected to the outer cylinder, for example, a lower chord 32 at the end of the main beam 3 may be connected to the upper chord 31 through an inclined rod, and the upper chord 31 is connected to the pre-embedded bolt on the inner wall of the chimney outer cylinder 1.
The other end of the main beam 3 is located at the center of the circle of the cross section of the chimney outer cylinder 1 and is connected with the end parts of the other two main beams 3, namely the end parts of the three main beams 3 are connected together, the cross section of the chimney outer cylinder 1 is equally divided into three fan-shaped areas by the three main beams 3, and each fan-shaped area is internally provided with the chimney inner cylinder 2, so that the structural distribution is balanced. The secondary beams 4 can then be connected from the primary beams 3 to support the chimney inner barrel 2. Above-mentioned connected mode, 3 spans of girder are little, the hoist and mount of being convenient for, and structural strength is high moreover.
The ends of the three main beams 3 may be directly connected, and preferably, as shown in fig. 3, the main beams further include a center piece 30, the center piece 30 has a hexagonal prism shape, and the axis position of the center piece is provided with a through hole, and the ends of the main beams 3 are connected with the side surface of the center piece 30.
A secondary beam 4 is further arranged between the main beam 3 and the chimney outer barrel 1, and the secondary beam 4 can be made of profile steel or a truss beam according to conditions. As shown in fig. 1, two ends of the secondary beam 4 may be connected between the primary beam 3 and the chimney outer barrel 1, between the primary beam 3 and the secondary beam 4, or between the secondary beam 4 and the secondary beam 4. The secondary beam 4 is used for dispersing the stress of the main beam 3, is connected to the periphery of the chimney inner cylinder 2 in a surrounding mode, and is used for supporting the weight of the chimney inner cylinder 2, and preferably can be as shown in figure 1, the secondary beam 4 forms a regular hexagonal frame 41 which is circumscribed with the cross section of the chimney inner cylinder 2, and the chimney inner cylinder 2 is located in the regular hexagonal frame 41.
The shaking prevention device is used for limiting the horizontal position of the chimney inner barrel 2 and maintaining the position stability, and is connected with the main beam 3 and/or the secondary beam 4.
Furthermore, it is possible to further comprise a ladder 5, said ladder 5 being located in said sector area, said ladder 5 being surrounded by the main beam 3 and/or the secondary beam 4 and being connected to the main beam 3 and/or the secondary beam 4. I.e. the main beams 3 and/or the secondary beams 4 are also connected around the periphery of the ladder 5 to maintain the stable position of the ladder 5.
Claims (3)
1. The truss bearing platform structure of the three-pipe sleeve type chimney comprises a chimney outer cylinder (1), wherein three chimney inner cylinders (2) are arranged in the chimney outer cylinder (1), and the centers of cross sections of the three chimney inner cylinders (2) are distributed along the angular points of regular triangles, and is characterized by further comprising three main beams (3), wherein each main beam (3) comprises an upper chord (31) and a lower chord (32), and a plurality of web members are connected between the upper chord (31) and the lower chord (32) to form a truss structure; one end of each main beam (3) is connected to the inner wall of the chimney outer cylinder (1), the other end of each main beam (3) is located at the circle center of the cross section of the chimney outer cylinder (1) and is connected with the end parts of the other two main beams (3), the cross section of the chimney outer cylinder (1) is equally divided into three fan-shaped areas by the three main beams (3), and each fan-shaped area is internally provided with one chimney inner cylinder (2);
each sector area is also provided with a plurality of secondary beams (4), and the secondary beams (4) are distributed on the periphery of the chimney inner cylinder (2) in a surrounding manner and are connected with the chimney inner cylinder (2); the main beam (3) and/or the secondary beam (4) are/is also connected with a shaking control device for maintaining the horizontal position of the chimney inner cylinder (2);
the main beam (3) is connected to one end of the inner wall of the chimney outer barrel (1) in the following arrangement mode: a lower chord (32) at the end part of the main beam (3) is connected with an upper chord (31) through an inclined rod, and the upper chord (31) is connected with an embedded bolt on the inner wall of the chimney outer cylinder (1); the connection mode of the main beam (3) at the circle center of the section of the chimney outer cylinder (1) is as follows: the main beam is characterized by further comprising a center piece (30), wherein the center piece (30) is hexagonal, a through hole is formed in the axis position, and the end of the main beam (3) is connected with the side face of the center piece (30).
2. The truss load-bearing platform structure of a three-pipe sleeve chimney according to claim 1, wherein the secondary beams (4) form a regular hexagonal frame (41) circumscribing the cross-section of the chimney inner barrel (2), the chimney inner barrel (2) being located in the regular hexagonal frame (41).
3. The truss load-bearing platform structure of a three-pipe sleeve chimney according to claim 1, characterized in that it further comprises a ladder (5), wherein the ladder (5) is located in the sector area, and the ladder (5) is surrounded by and connected with the main beams (3) and/or the secondary beams (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034551.XA CN107795184B (en) | 2017-10-30 | 2017-10-30 | Truss bearing platform structure of three-pipe sleeve type chimney |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034551.XA CN107795184B (en) | 2017-10-30 | 2017-10-30 | Truss bearing platform structure of three-pipe sleeve type chimney |
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| Publication Number | Publication Date |
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| CN107795184A CN107795184A (en) | 2018-03-13 |
| CN107795184B true CN107795184B (en) | 2020-06-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359693B (en) * | 2019-06-24 | 2024-04-09 | 中国五冶集团有限公司 | A suspended scaffolding structure |
| CN111962956A (en) * | 2020-08-07 | 2020-11-20 | 上海必立结构设计事务所有限公司 | Method for improving D-shaped inner cylinder chimney |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3073371B2 (en) * | 1993-09-13 | 2000-08-07 | 三菱重工業株式会社 | Tower-like structure erection method and equipment |
| US8578679B1 (en) * | 2008-10-03 | 2013-11-12 | Davor Petricio Yaksic | Smokestack assembly |
| CN102677943B (en) * | 2012-06-04 | 2014-04-09 | 四川电力设计咨询有限责任公司 | Mounting structure for three-tube tube-in-tube chimney |
| CN103556862B (en) * | 2013-10-29 | 2016-01-20 | 中国电力工程顾问集团华东电力设计院有限公司 | Multitube suspension type chimney internal cylinder system of support structures |
| CN104989166A (en) * | 2015-07-15 | 2015-10-21 | 中国能源建设集团广东省电力设计研究院有限公司 | Support structure for chimney internal steel cylinders |
| CN205560795U (en) * | 2016-02-22 | 2016-09-07 | 中国能源建设集团广东省电力设计研究院有限公司 | Truss -like supporting platform of chimney inner tube |
| CN105545065B (en) * | 2016-02-22 | 2017-12-08 | 中国能源建设集团广东省电力设计研究院有限公司 | The supporting construction of chimney internal cylinder |
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