CN113338690B - A support conversion structure for heavy-load equipment on top of a heat absorbing tower and a method of using the same - Google Patents
A support conversion structure for heavy-load equipment on top of a heat absorbing tower and a method of using the same Download PDFInfo
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- CN113338690B CN113338690B CN202110561092.0A CN202110561092A CN113338690B CN 113338690 B CN113338690 B CN 113338690B CN 202110561092 A CN202110561092 A CN 202110561092A CN 113338690 B CN113338690 B CN 113338690B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 108
- 239000010959 steel Substances 0.000 claims abstract description 108
- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 11
- 238000010248 power generation Methods 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 description 19
- 238000005452 bending Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 6
- 238000010008 shearing Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000013529 heat transfer fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
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Abstract
The invention belongs to the technical field of tower type photo-thermal power generation, and particularly provides a support conversion structure of heavy load equipment at the top of a heat absorption tower and a use method thereof, wherein the heavy load equipment is arranged at the top of the heat absorption tower through the support conversion structure, the support conversion structure comprises a space steel truss and a top plate, the space steel truss comprises an upper chord beam and a lower chord beam, the upper chord beam is connected with the lower chord beam, a tower wall beam nest is formed in the top of the heat absorption tower wall, tower wall brackets are arranged on the inner side wall of the heat absorption tower wall, the number of the space steel trusses is multiple, the upper chord beams of the multiple space steel trusses are connected to the top of the heat absorption tower through the tower wall beam nest, the top plate is placed on the top surface of the upper chord beam, and the lower chord beams of the multiple space steel trusses are connected to the top surface of the tower wall brackets; the invention realizes the support and conversion of heavy-duty equipment, meets the requirements of integral stress and coordinated deformation under the action of wind load, and the design method of rigidity and bearing capacity can also be applied to conversion structures of other high-rise structures.
Description
Technical Field
The invention belongs to the technical field of tower type photo-thermal power generation, and particularly relates to a support conversion structure of a tower top heavy load device of an endothermic tower and a use method thereof.
Background
In a tower type molten salt solar photo-thermal power generation system, a heat absorption tower is a core structure of a tower type solar power station, and the total height of the structure is generally more than 150m. The heat absorber is used as one of core devices and is positioned at the top of the heat absorbing tower to collect the radiant energy with high heat flux density reflected by heliostats on the ground. The outer surface of the exposed tube type heat absorber is welded together by a large number of straight tubes which are vertically arranged side by side to form a strip-shaped heat absorbing plate, the heat absorbing plates are spliced to be cylindrical, and heat transfer fluid headers are arranged in the heat absorbing plates and at the tops of the heat absorbing plates and the heat transfer fluid headers and used for supplying cold heat transfer fluid to the heat absorber and collecting heated heat transfer fluid, and the self weight of the heat absorbing plates is generally 1000-3500 tons, so that the heat absorbing tower is in a special high-rise structure with 'head heavy feet light'.
The heat absorption tower is different from high-rise structures such as a chimney and a television tower, and the like, and an air compression tank, an electric power distribution cabinet, an equipment layer and the like are arranged in the tower top area, so that the heat absorption tower is mainly characterized by uneven structural mass distribution, uneven structural rigidity distribution and obvious abrupt change of the tower top appearance, and no special design specification for the heat absorption tower structure exists at present. In the structural design of a heat absorption tower, the connection mode of a mode adopted by a tower top conversion structure and a supporting node is important, and the main design difficulty of the tower top conversion structure is as follows:
1) The heat absorber device and the supporting frame thereof are used as a part of the heat absorption tower structure to carry out overall modal analysis, and the power parameters (period, vibration mode coefficient, damping ratio and the like) of the heat absorber device are valued to greatly influence the calculation results of wind vibration and earthquake actions. Therefore, the conversion structure actually constructed should be strictly consistent with the mechanical analysis model, and the swing limit value of the heat absorber in the normal use process should be met.
2) According to the seismic analysis experience of the prior towering structure, the top component with abrupt shape and rigidity has larger horizontal displacement and obvious 'whipping effect', and has larger design difficulty for meeting the strength and rigidity indexes of the whole structure, especially in a high-intensity area.
3) Because the tower top is high, the design of the conversion structure can reduce the difficulty of construction hoisting and installation on the premise of high-altitude operation, and the construction period is shortened to the greatest extent.
Disclosure of Invention
The invention aims to provide a support conversion structure of a heavy-load device at the top of a heat absorption tower, which realizes that a heat absorber is successfully transited to the heat absorption tower through the conversion structure, meets the strength and rigidity requirements required by the support structure, and provides powerful technical support for the future design and application of the heat absorption tower.
The invention further aims to provide a use method of the support conversion structure of the heavy-load equipment at the top of the heat absorption tower, and provides an arrangement method for guaranteeing the rigidity of the space steel truss structure and a connection method for guaranteeing the bearing capacity of the conversion structure and the tower wall.
The invention provides a support conversion structure of a heavy load device at the top of a heat absorption tower, the heavy load device is arranged at the top of the heat absorption tower through the support conversion structure, the heavy load device comprises a heat absorber and a support steel column, the heat absorber is arranged on the support conversion structure through the support steel column, the support conversion structure comprises a space steel truss and a top plate, the space steel truss comprises an upper chord beam and a lower chord beam, the upper chord beam is connected with the lower chord beam, a tower wall beam nest is arranged at the top of the heat absorption tower wall, tower wall brackets are arranged on the inner side wall of the heat absorption tower wall, the number of the space steel trusses is multiple, the upper chord beams of the multiple space steel trusses are connected at the top of the heat absorption tower through the tower wall beam nest, the top plate is connected to the top surface of the upper chord beam, and the lower chord beams of the multiple space steel trusses are connected to the top surface of the tower wall brackets.
The space steel truss further comprises a plurality of upper chord beam outer arms and upper chord connecting beams, each upper chord beam outer arm is connected with the upper chord beam in a cross mode, and the upper chord beam outer arms of the two adjacent space steel trusses are connected through the upper chord connecting beams.
The space steel truss further comprises a plurality of column foot rigid support nodes, and the intersection area of the upper chord beam and the outer arm of the upper chord beam is connected with 1 column foot rigid support node.
The space steel truss further comprises a horizontal support, and the lower chord beams of the plurality of space steel trusses are connected through the horizontal support.
The space steel truss further comprises a plurality of web members, the upper chord beam is connected with the lower chord beam through the web members, and the web members are arranged below the rigid support nodes of each column base.
The upper chord beam, the lower chord beam, the web members, the outer arms of the upper chord beam and the upper chord contact beam are all wide flange H-shaped steel, the wide flange H-shaped steel comprises an upper flange, a lower flange and a vertical connecting plate, the upper flange and the lower flange are arranged in parallel, and the middle parts of the upper flange and the lower flange are connected through the vertical connecting plate.
The column base rigid support node comprises a horizontal reinforcing rib plate and a vertical reinforcing rib plate, wherein the inner side of an upper flange and the inner side of a lower flange of an intersection area of an upper chord beam and an outer arm of the upper chord beam are both horizontally connected with the horizontal reinforcing rib plate, and the vertical reinforcing rib plate is vertically connected between the upper flange and the lower flange of the intersection area of the upper chord beam and the outer arm of the upper chord beam.
The tower wall beam nest is a rectangular lower notch.
The plurality of space steel trusses are arranged according to the arrangement mode of the support steel columns, and the upper chord beam is consistent with the support steel columns in positioning.
The utility model provides a use method of support conversion structure of absorber tower top heavy load equipment, many space steel trusses are arranged according to the arrangement mode of support steel column in the absorber tower top heavy load equipment, wherein go up string roof beam and support steel column location unanimous, go up string roof beam below and pass through the web member and connect the top of lower string roof beam, go up string roof beam and pass through tower wall girder nest cantilever, adopt the banding roof beam to connect gradually the section of encorbelmenting and encircle the connection, the tip of lower string roof beam links the top surface of Yu Dabi bracket, the roof is placed on last string roof beam.
The invention has the beneficial effects that:
1. the supporting and converting structure of the heavy load equipment at the top of the heat absorption tower, provided by the invention, has the advantages of good self integrity, strong stability, definite force transmission, safety and reliability by means of dual transmission of internal forces such as bending moment, shearing force and the like from the upper part and the lower part of the tower wall beam nest and the tower wall bracket respectively;
2. According to the support conversion structure of the top heavy load equipment of the heat absorption tower, provided by the invention, the column foot rigid support node is arranged in the intersection area of the upper chord beam and the outer arm of the upper chord beam, and the column foot rigid support node is used for firmly fixing the column foot of the support frame of the upper heavy load equipment.
3. The support conversion structure of the heavy load equipment at the top of the heat absorption tower can realize factory prefabrication and assembly, and only needs a small amount of welding or cast-in-place work after high-altitude hoisting. Compared with the common beam type and thick plate type conversion structure, the construction is quicker and more convenient.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a top view of an embodiment of an upper bridge of the present invention;
FIG. 2 is a top view of the structure of a lower bridge according to one embodiment of the present invention;
FIG. 3 is a front view of the structure of a space steel truss;
FIG. 4 is a structural top view of a toe rigid support node;
FIG. 5 is a cross-sectional view of the structure 1-1 of FIG. 4;
FIG. 6 is a top view of a tower wall nest structure;
FIG. 7 is a front view of a tower wall dimple structure;
fig. 8 is a front view of a tower wall bracket and lower chord beam connection structure.
The reference numerals indicate that the steel truss is 1, a space steel truss, 2, column foot rigid support nodes, 3, an upper chord connecting beam, 4, a horizontal support, 5, an upper chord beam, 6, a lower chord beam, 7, a web member, 8, an upper chord beam outer arm, 9, a horizontal reinforcing rib plate, 10, a vertical reinforcing rib plate, 11, a top plate, 12, column foot bolts, 13, a column wall beam nest, 14, a column wall bracket, 15, a support steel column, 16 and a heat absorption column wall.
Detailed Description
Example 1:
As shown in fig. 1, 3 and 5-8, a support conversion structure of a heavy load device at the top of a heat absorption tower is provided, the heavy load device is installed at the top of the heat absorption tower through the support conversion structure, the heavy load device comprises a heat absorber and support steel columns 15, the heat absorber is installed on the support conversion structure through the support steel columns 15, the support conversion structure comprises a space steel truss 1 and a top plate 11, the space steel truss 1 comprises an upper chord 5 and a lower chord 6, the lower chord 6 is connected to the upper chord 5, a tower wall beam nest 13 is formed in the top of the heat absorption tower wall 16, tower wall brackets 14 are arranged on the inner side walls of the heat absorption tower wall 16, the number of the space steel trusses 1 is multiple, the upper chord 5 of the multiple space steel trusses 1 is connected to the top of the heat absorption tower through the tower wall beam nest 13, the top plate 11 is connected to the top surface of the upper chord 5, and the lower chord 6 of the multiple space steel trusses 1 is connected to the top surface of the tower wall bracket 14.
The supporting and converting structure of the heavy load equipment at the top of the heat absorption tower has the advantages that the upper chord beam 5 of the supporting and converting structure is cantilevered out of the tower wall 16 of the heat absorption tower through the tower wall beam nest 13, a tower roof system is formed together with the top plate 11, the supporting and converting structure is good in self-integrity and high in stability, partial bending moment, shearing force and axial force born by the space steel truss 1 are transmitted to the tower wall from the upper part by means of the tower wall beam nest 13, and the rest bending moment, shearing force and axial force born by the space steel truss 1 are transmitted to the tower wall from the lower part by means of the tower wall bracket 14, so that the supporting and converting structure has the advantages of clear force transmission, safety and reliability. The top plate 11 is a concrete plate directly placed on the upper chord beam 5, and the thickness and the reinforcement are determined according to the construction requirements, so as to play a role in maintenance such as shielding rain and snow.
Example 2:
on the basis of embodiment 1, the space steel truss 1 further comprises a plurality of upper chord beam outer arms 8 and upper chord connecting beams 3, each upper chord beam outer arm 8 is in cross connection with the upper chord beam 5, and the upper chord beam outer arms 8 of two adjacent space steel trusses 1 are connected through the upper chord connecting beams 3.
The upper chord connecting beam 3 is an extension part of an outer arm 8 of the upper chord beam and is used for connecting a plurality of space steel trusses 1, so that the upper parts of the space steel trusses 1 are stressed integrally, and the transverse and longitudinal rigidity of the space steel trusses 1 is enhanced.
Further, the space steel truss 1 further comprises a plurality of column foot rigid support joints 2, and the crossing area of the upper chord beam 5 and the upper chord beam outer arm 8 is connected with 1 column foot rigid support joint 2. The column base rigid support node 2 is used for directly supporting the heat absorber support steel column 15, bearing the load of all upper heavy-duty equipment and transmitting internal force to the space steel truss 1 structure.
As shown in fig. 2, further, the space steel truss 1 further comprises a horizontal support 4, and the lower chord beams 6 of the multiple space steel trusses 1 are connected through the horizontal support 4. The lower chord beams 6 of the multiple space steel trusses 1 are connected through horizontal supports 4, so that the integrity and stability of the lower parts of the space steel trusses 1 are enhanced.
Furthermore, the horizontal supports 4 are arranged in a cross mode through round steel pipes and are used for being connected with the lower chord beams 6 of the space steel truss 1, and the end portions of the horizontal supports 4 are connected in a hinged mode, so that the whole stress between the lower portions of the space steel truss 1 is achieved, the structure is simple, the transverse and longitudinal rigidity of the space steel truss 1 is further enhanced, the hinged connection strength is high, the dead weight is light, and the integrity and the shock resistance are good.
Further, the space steel truss 1 further comprises a plurality of web members 7, the upper chord member 5 is connected with the lower chord member 6 through the plurality of web members 7, and the web members 7 are arranged below each column foot rigid support node 2. The web members 7 are arranged below the column foot rigid support nodes 2 to improve the shock resistance and the deformation capacity of the column foot rigid support nodes 2.
Further, the upper chord beam 5, the lower chord beam 6, the web member 7, the upper chord beam outer arm 8 and the upper chord contact beam 3 are all made of wide flange H-shaped steel, the wide flange H-shaped steel comprises an upper flange, a lower flange and a vertical connecting plate, the upper flange and the lower flange are arranged in parallel, and the middle parts of the upper flange and the lower flange are connected through the vertical connecting plate.
The wide flange H-shaped steel has wide flange, high lateral rigidity and high bending resistance, and the upper flange and the lower flange are mutually parallel so as to lead the connection, the processing and the installation to be simple and convenient, save the cost, have light structure weight, high stability and high structural strength.
Further, the column base rigid support node 2 comprises a horizontal reinforcing rib plate 9 and a vertical reinforcing rib plate 10, wherein the inner side of an upper flange and the inner side of a lower flange of an intersection area of the upper chord beam 5 and the upper chord beam outer arm 8 are both horizontally connected with the horizontal reinforcing rib plate 9, and the vertical reinforcing rib plate 10 is vertically connected between the upper flange and the lower flange of the intersection area of the upper chord beam 5 and the upper chord beam outer arm 8.
The upper chord beam outer arm 8 is arranged at the column foot rigid support node 2, the joint of the upper chord beam 5 and the web member 7 is properly arranged, 90 degrees of orthogonality is formed between the upper chord beam outer arm 8 and the upper chord beam 5, the extension length of the upper chord beam outer arm 8 is 1.0-1.5 times of the width of the upper chord beam 5, the upper chord beam outer arm 8 and the upper chord beam 5 are required to be in equal-section and equal-strength rigid butt joint, the upper chord beam outer arm 8 plays a role in strengthening the out-of-plane stabilization of the space steel truss 1, meanwhile, the upper chord beam outer arm 8 serves as a part of the column foot rigid support node 2, the upper chord beam outer arm 8 can be prefabricated with the whole space steel truss 1 in a factory and serves as a part of the space steel truss 1, and the high-altitude hoisting and installation work workload is greatly reduced.
As shown in FIG. 4, further, the thickness of the horizontal reinforcement rib plate 9 is greater than or equal to that of the upper flange or the lower flange, the width of the horizontal reinforcement rib plate 9 is 2/3 of that of the upper chord beam 5, the number of the vertical reinforcement rib plates 10 is multiple, the vertical reinforcement rib plates 10 are arranged in a triangle and polygon shape, the thickness of the vertical reinforcement rib plates 10 is greater than or equal to that of the web member 7, the similar box-shaped design method can greatly strengthen the bending rigidity and torsional rigidity of the rigid node, firmly fix the upper bracket and cooperatively deform with the tower top, and the upper heat absorber bracket column foot 15 is firmly fixed through the box-shaped rigid support node 2.
Furthermore, the rigid support node 2 further comprises a column foot bolt 12, the column foot bolt 12 sequentially penetrates through the top plate 11, the horizontal reinforcing rib plate 9 below the upper flange and the horizontal reinforcing rib plate 9 above the lower flange from top to bottom, and the rigid support node 2 is convenient to connect, simple in structure and capable of improving the overall stability of the rigid support node 2.
Further, the number of the column base bolts 12 is plural, and the plurality of column base bolts 12 are uniformly and symmetrically distributed on the rigid support node 2, so that the stability of the whole structure of the rigid support node 2 is improved.
Further, the tower wall beam nest 13 is a rectangular lower notch. The rectangular lower notch has a simple structure, and the upper chord beam 5 can be stably arranged in the tower wall of the heat absorption tower.
Further, the width of the tower wall beam nest 13 is 100mm wider than that of the upper chord beam 5, the reserved height of the tower wall beam nest 13 is equal to the beam height of the upper chord beam 5 plus the buckling deformation amount, the buckling deformation amount is 10-15 mm, the upper chord beam 5 is ensured to be completely arranged in the tower wall of the heat absorption tower, and meanwhile, the stability is high.
Furthermore, reinforcing steel bars are arranged in the rectangular lower notch, so that the stability of connection is improved, the tower wall beam nest 13 firmly supports the upper chord beam 5, and part of bending moment, shearing force and axial force born by the space steel truss are transmitted to the tower wall.
Further, two ends of the lower chord beam 6 are connected with tower wall brackets 14 through steel embedded parts and bolts.
The tower wall bracket 14 is arranged on the side wall of the heat absorption tower wall 16, the tower wall bracket 14 corresponds to the lower chord beam 6 of each space steel truss 1, the height and width of the tower wall bracket 14 are determined by the crack control requirement, the top of the tower wall bracket 14 is provided with a steel embedded part and a high-strength bolt, the end part of the lower chord beam 6 is fixed, the lower chord beam 6 is supported by the tower wall bracket 14, and the rest bending moment, shearing force and axial force born by the space steel trusses 1 are transmitted to the tower wall.
Further, the multiple space steel trusses 1 are arranged according to the arrangement mode of the support steel columns 15, and the upper chord beams 5 and the support steel columns 15 are positioned consistently. The upper bridge 5 is positioned in line with the support steel columns 15 so as to realize rigid support nodes of the column base.
Furthermore, the multiple space steel trusses 1 are arranged in parallel, and the multiple space steel trusses 1 are symmetrically arranged relative to the circle center of the tower wall 16 of the heat absorption tower, so that rigid support nodes of column bases are realized, and the earthquake resistance and deformation capacity of the nodes are improved.
Furthermore, the section rigidity of the upper chord beam 5 is 1.5-2.0 times of that of the lower chord beam 6, and the upper chord beam 5 is a direct bearing member of the heat absorber support steel column 15, so that the structure can improve the whole bearing capacity, the anti-seismic performance and the deformability.
Further, the tower wall girder nest 13 further comprises edge sealing beams, and the upper chord beams 5 of the multiple space steel trusses 1 outside the tower wall girder nest 13 are connected through the edge sealing beams. The upper chord beam 5 is overhung for a certain distance through the tower wall beam nest 13, and the overhanging sections are sequentially connected by adopting the edge sealing beam to form a circle.
Furthermore, the web members 7 comprise inclined web members and vertical web members, the inclined web members and the vertical web members are distributed according to the requirements, the section rigidity of the inclined web members at the end part of the lower chord beam 6 is about 1.5 times that of the middle web plate, the stress requirement is met, and the integrity and the firmness of the connection between the space steel truss 1 and the tower wall are further enhanced.
Further, the upper chord connecting beam 3 and the upper chord beam outer arm 8 are in equal section and equal strength rigid butt joint. The connecting structure is used for connecting adjacent space steel trusses 1, so that the upper parts of the space steel trusses 1 are stressed integrally, and the transverse and longitudinal rigidity of the space steel trusses 1 is enhanced.
The support conversion structure of the heavy load equipment at the top of the heat absorption tower can realize factory prefabrication and assembly, only needs a small amount of welding or cast-in-place work after high-altitude hoisting, and is more rapid and convenient to construct than the general beam-type and thick plate conversion structure;
The support conversion structure of the heavy load equipment at the top of the heat absorption tower has economy and practicability in the field of tower type photo-thermal power station engineering at home and abroad, and the design method of the rigidity and the bearing capacity can be applied to conversion structures of other high-rise structures, so that the support conversion structure has wide application prospect.
Example 3:
The utility model provides a use method of support conversion structure of absorber tower top heavy load equipment, many space steel trusses 1 are arranged according to the arrangement mode of the support steel column 15 of upper portion absorber, wherein go up string roof beam 5 and support steel column 15 location unanimity, be equipped with web member 7 below column foot rigid support node 2, go up string roof beam 5 and encorbelment through tower wall beam nest 13, adopt the banding roof beam to connect gradually the section of encorbelmenting and encircle, the tip of lower string roof beam 6 links Yu Dabi bracket 14's top surface, roof 11 is placed on last string roof beam 5.
The concrete design principle of the using method of the invention is that the upper chord beam 5 is positioned to correspond to the upper equipment support steel columns 15 one by one as much as possible so as to realize a column foot rigid support node 2, a web member 7 (inclined or vertical web member) is required to be arranged below the column foot rigid support node 2 in order to improve the shock resistance and the deformation capacity of the node, the upper chord beam 5 is a direct bearing member of the absorber support steel columns 15, the section rigidity of the upper chord beam 5 is 1.5-2.0 times of the section rigidity of the lower chord beam 6, the upper chord beam 5 is cantilevered for a certain distance through a column wall beam nest 13, and the cantilever sections are sequentially connected into a circle by adopting edge sealing beams. The application method of the tower top conversion structure provides an arrangement method for guaranteeing the rigidity of the space steel truss structure and a connection method for guaranteeing the bearing capacity of the conversion structure and the tower wall, and the steel truss type conversion structure has good applicability and reliability in combination with practical application of the project.
In the description of the present invention, it should be understood that, if any, the terms "left," "inner," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, rather than indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms describing the positional relationship in the drawings are for illustration only and are not to be construed as limiting the invention.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (7)
1. A supporting conversion structure of a heavy load device at the top of a heat absorption tower is characterized in that the supporting conversion structure comprises a space steel truss (1) and a top plate (11), the space steel truss (1) comprises an upper chord beam (5) and a lower chord beam (6), the lower chord beam (6) is connected with the upper chord beam (5), a tower wall beam nest (13) is arranged at the top of a heat absorption tower wall (16), tower wall bracket (14) is arranged on the inner side wall of the heat absorption tower wall (16), the number of the space steel trusses (1) is multiple, the upper chord beams (5) of the multiple space steel trusses (1) are connected to the top of the heat absorption tower through tower wall beam nests (13), the top plate (11) is connected to the top surface of the upper chord beam (5), the lower chord beam (6) of the multiple space steel trusses (1) is connected to the top surface of the tower wall bracket (14), the space steel trusses (1) are further connected to the upper chord beams (8) and the upper chord beams (8) are connected to the outer chord beams (8), the space steel truss (1) further comprises a plurality of column foot rigid support nodes (2), the cross areas of the upper chord beam (5) and the upper chord beam outer arms (8) are connected with the 1 column foot rigid support nodes (2), the upper chord beam (5) and the upper chord beam outer arms (8) are respectively made of wide flange H-shaped steel, the wide flange H-shaped steel comprises an upper flange, a lower flange and a vertical connecting plate, the upper flange and the lower flange are arranged in parallel, the middle parts of the upper flange and the lower flange are connected through the vertical connecting plate, the column foot rigid support nodes (2) comprise horizontal reinforcing rib plates (9) and vertical reinforcing rib plates (10), the inner sides of the upper flanges of the cross areas of the upper chord beam (5) and the upper chord beam outer arms (8) are respectively and horizontally connected with the horizontal reinforcing rib plates (9), the vertical reinforcing rib plates (10) are vertically connected between the upper flanges and the lower flanges of the cross areas of the upper chord beam (5) and the upper chord beam outer arms (8), the plurality of the vertical reinforcing rib plates (10) are arranged in a triangular shape, and the column foot rigid support nodes (12) are respectively arranged by the plurality of the column foot rigid support nodes (12) and the column foot rigid support nodes (12) are arranged in sequence The column foot support structure comprises a column foot rigid support node (2), a horizontal reinforcing rib plate (9) below an upper flange and a horizontal reinforcing rib plate (9) above a lower flange, wherein the number of column foot bolts (12) is multiple, the column foot bolts (12) are uniformly and symmetrically distributed on the column foot rigid support node (2), and the column foot support structure further comprises edge sealing beams, wherein the upper chord beams (5) of the multiple space steel trusses (1) outside a column wall beam nest (13) are connected through the edge sealing beams.
2. The support conversion structure of the heavy load equipment on the top of the heat absorption tower according to claim 1, wherein the space steel truss (1) further comprises a horizontal support (4), and the lower chord beams (6) of the plurality of space steel trusses (1) are connected through the horizontal support (4).
3. The support conversion structure of the tower top heavy load equipment of the heat absorption tower according to claim 2, wherein the space steel truss (1) further comprises a plurality of web members (7), the upper chord member (5) is connected with the lower chord member (6) through the plurality of web members (7), and the web members (7) are arranged below each column foot rigid support node (2).
4. The support conversion structure of the heavy load equipment at the top of the heat absorption tower according to claim 3, wherein the lower chord beam (6), the web member (7) and the upper chord connecting beam (3) are all wide-flange H-shaped steel, the wide-flange H-shaped steel comprises an upper flange, a lower flange and a vertical connecting plate, the upper flange and the lower flange are arranged in parallel, and the middle parts of the upper flange and the lower flange are connected through the vertical connecting plate.
5. The support conversion structure of heat absorption tower top heavy load equipment according to claim 4, wherein the tower wall beam nest (13) is a rectangular lower notch.
6. The supporting and converting structure of the heavy load equipment on the top of the heat absorption tower according to claim 1, wherein the plurality of space steel trusses (1) are arranged according to the arrangement mode of the support steel columns (15), and the upper chord beam (5) is positioned consistent with the support steel columns (15).
7. A use method of a support conversion structure based on heat absorption tower top heavy-duty equipment according to any one of claims 1-6 is characterized by comprising the following steps that a plurality of space steel trusses (1) are arranged according to an arrangement mode of support steel columns (15) in the heat absorption tower top heavy-duty equipment, wherein an upper chord beam (5) and the support steel columns (15) are positioned consistently, the lower surface of the upper chord beam (5) is connected with the upper surface of a lower chord beam (6) through web members (7), the upper chord beam (5) is overhanging through a tower wall beam nest (13), overhanging sections are sequentially connected and connected in a surrounding mode through edge sealing beams, the end portions of the lower chord beam (6) are connected with the top surfaces of Yu Dabi corbels (14), and a top plate (11) is placed on the upper chord beam (5).
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| CN113686029A (en) * | 2021-09-14 | 2021-11-23 | 中国电力工程顾问集团西北电力设计院有限公司 | Ventilation heat absorption tower structure |
| CN113931814A (en) * | 2021-09-18 | 2022-01-14 | 同济大学 | A solar thermal power generation system including diagonal grid industrial structures |
| CN113899083A (en) * | 2021-09-18 | 2022-01-07 | 同济大学 | A solar thermal power generation system including a giant frame diagonal bracing structure |
| CN114135090A (en) * | 2021-12-18 | 2022-03-04 | 武汉理工大学 | Assembly type operation platform of compound fertilizer granulation high tower and construction method thereof |
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