Mounting structure for three-tube tube-in-tube chimney
A kind of installation structure, barrel technology, applied in building types, buildings, towers, etc., can solve the problems of increased stress, different mechanical properties, high strength and low elastic modulus, and achieves convenient hoisting, reduced construction costs, and compact structure. Effect
Active Publication Date: 2014-04-09
四川电力设计咨询有限责任公司
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Problems solved by technology
FRP has good corrosion resistance and economy, and is the best material for the inner cylinder of low-temperature sleeve chimneys in power plants. However, FRP materials have different mechanical properties from ordinary metal materials. They have high strength and low elastic modulus. Due to the characteristics of heterogeneity in mechanical properties in three directions, due to the deformation of the reinforced concrete outer cylinder of the sleeve chimney under the conditions of sunshine, wind and earthquakes, according to the principle of coordination of deformation of the inner and outer cylinders, the deformation of the outer cylinder will cause the stress of the FRP inner cylinder to increase. The original three-point support connection cannot meet the safety requirements of the design. The reasonable structural layout of the load-bearing platform must be considered in the design, and the support points of the inner cylinder on the platform can be increased to reduce the safety hazard caused by the stress concentration of the inner cylinder.
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[0023] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.
[0024] Such as image 3 The shown three-pipe sleeve chimney installation structure includes an outer cylinder 1 and three inner cylinders 4 evenly distributed inside the outer cylinder 1, and each inner cylinder 4 is fixed to the outer cylinder 1 through a load-bearing platform 10 installed inside the outer cylinder 1 superior. The load-bearing platform 10 is formed by connecting three main beams 3 uniformly distributed on the inner cross section of the outer tube 1 . Between any adjacent two main girders 3 on the load-bearing platform 10, the support frame group 2 is set, such as Figure 4 As shown, between the first main beam 31 and the second main beam 32, between the second main beam 32 and the third main beam 33, and between the first main beam 31 and the third main beam 33, there are three supports Frame group 2.
[0025] Such as Figur...
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The invention discloses a mounting structure for a chimney, particularly a mounting structure for a three-tube tube-in-tube chimney used in a large-scale power plant. The invention aims to solve the technical problem about providing a chimney structure having a bearing platform which increases the support point number for inner tubes of the three-tube tube-in-tube chimney and reduces the inner tube stress concentration. The structure includes an outer tube, three inner tubes evenly distributed inside the outer tube, and three main beams evenly distributed and mounted inside the outer tube, wherein the three main beams are connected mutually to form the bearing platform, each inner tube is mounted on the outer tube through the bearing platform, a supporting frame unit is arranged between a first main beam and a second main beam in any two adjacent main beams, the inside of the supporting frame unit forms hexagonal spaces matched with the external diameters of the inner tubes, and the inner tubes are connected with each beam of the hexagonal spaces of the supporting frame unit. For the improvement on the structure, the hexagonal spaces formed inside the supporting frame unit are regular hexagonal spaces.
Description
technical field [0001] The invention relates to a chimney installation structure, in particular to a three-pipe sleeve type chimney installation structure suitable for large-scale power plants. Background technique [0002] In the chimney design of domestic power plants, three-pipe sleeve chimneys are widely used. The inner cylinder material of the low temperature sleeve chimney is mostly made of titanium-steel composite plate. The titanium-steel composite plate material has the advantages of good strength and good corrosion resistance. The traditional inner cylinder load-bearing platform adopts such as figure 1 and figure 2 As shown, the three main beams are connected in a triangular arrangement, and three secondary beams are arranged between the three main beams, and the adjacent two main beams and one secondary beam form a supporting frame group. The cylinder is installed in an independent supporting frame group, and only three supporting points bear the load. The load...
Claims
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IPC IPC(8): E04H12/28
Inventor陈刚漆桧代晓李龙华
Owner四川电力设计咨询有限责任公司