CN113338690A - Support conversion structure of tower top heavy-duty equipment of heat absorption tower and use method - Google Patents
Support conversion structure of tower top heavy-duty equipment of heat absorption tower and use method Download PDFInfo
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- CN113338690A CN113338690A CN202110561092.0A CN202110561092A CN113338690A CN 113338690 A CN113338690 A CN 113338690A CN 202110561092 A CN202110561092 A CN 202110561092A CN 113338690 A CN113338690 A CN 113338690A
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- 239000010959 steel Substances 0.000 claims abstract description 114
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- 239000006096 absorbing agent Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 11
- 238000010248 power generation Methods 0.000 abstract description 3
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- 238000004458 analytical method Methods 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 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
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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
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Abstract
本发明属于塔式光热发电技术领域，具体提供了一种吸热塔塔顶重载设备的支撑转换结构及使用方法，所述重载设备通过支撑转换结构安装在吸热塔塔顶上，支撑转换结构包括空间钢桁架和顶板，空间钢桁架包括上弦梁、下弦梁，上弦梁下连接下弦梁，吸热塔塔壁的塔顶开设有塔壁梁窝，吸热塔塔壁的内侧壁设置有塔壁牛腿，空间钢桁架的数量为多榀，多榀空间钢桁架的上弦梁通过塔壁梁窝连接在吸热塔顶部，上弦梁的顶面上放置顶板，多榀空间钢桁架的下弦梁连接在塔壁牛腿的顶面；本发明实现了重载设备的支撑和转换，满足了风荷载作用下整体受力及协调变形要求，其刚度和承载力的设计方法亦可应用到其它高耸构筑物的转换结构中。
The invention belongs to the technical field of tower-type solar thermal power generation, and specifically provides a support conversion structure and a use method of a heat-absorbing tower top heavy-load equipment, wherein the heavy-load equipment is installed on the heat-absorbing tower top through the support conversion structure, The support conversion structure includes a space steel truss and a roof. The space steel truss includes an upper chord beam and a lower chord beam. The upper chord beam is connected to the lower chord beam. There are tower wall corbels, the number of space steel trusses is multiple, the upper chord beam of the multiple space steel truss is connected to the top of the heat absorption tower through the tower wall beam socket, the top plate is placed on the top surface of the upper chord beam, and the multiple space steel truss The bottom chord beam is connected to the top surface of the tower wall corbel; the invention realizes the support and conversion of heavy-duty equipment, meets the requirements of overall force and coordinated deformation under the action of wind load, and the design method of its stiffness and bearing capacity can also be applied into the conversion structure of other high-rise buildings.
Description
Technical Field
The invention belongs to the technical field of tower type photo-thermal power generation, and particularly relates to a supporting and converting structure of a tower top heavy-load device of a heat absorption tower and a using method of the supporting and converting structure.
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 structural height generally exceeds 150 m. The heat absorber is used as one of core devices and is positioned at the top of the heat absorbing tower, and high heat flow density radiation energy reflected by the ground heliostats is gathered. The outer surface of the exposed pipe type heat absorber is welded together by a large number of vertical parallel straight pipes to form a strip-shaped heat absorbing plate, the heat absorbing plate is spliced to form a cylinder, heat transfer fluid headers are arranged inside and at the top of the heat absorbing plate and used for supplying cold heat transfer fluid to the heat absorber and collecting heated heat transfer fluid, the self weight of the heat absorbing tower is generally 1000-3500 tons, and the heat absorbing tower is made to be a special high-rise structure with light head and feet.
The heat absorption tower is different from high-rise structures such as a chimney and a television tower, an air compression tank, an electrical power distribution cabinet, an equipment layer and the like are arranged in the area of the top of the tower, the main effects are that the structural mass distribution is uneven, the structural rigidity distribution is uneven, the appearance of the top of the tower is obviously changed suddenly, and the special design specification aiming at the structure of the heat absorption tower is not available at present. The heat absorber is as heavily loaded equipment, and in heat absorption tower structural design, the form that top of the tower transform structure adopted and the connected mode of support node should be as heavily as the heavyweight, and top of the tower transform structure main design difficulty has:
1) the heat absorber equipment and the supporting framework thereof are used as a part of the heat absorption tower structure to carry out overall modal analysis, and the calculation results of wind vibration and earthquake action are greatly influenced by the value of dynamic parameters (period, vibration mode coefficient, damping ratio and the like). Therefore, the actually constructed conversion structure is strictly consistent with the mechanical analysis model, and the swing amplitude limit value of the heat absorber in the normal use process is required to be met.
2) According to the seismic analysis experience of the traditional high-rise structure, the horizontal displacement of the top component with the suddenly-changed appearance and rigidity, particularly in a high-intensity area, is large, the obvious 'whip effect' is accompanied, and the design difficulty is large in order to meet the strength and rigidity indexes of the whole structure.
3) Because the height of 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 maximum extent.
Disclosure of Invention
The invention aims to provide a support conversion structure of heavy-duty equipment on the top of a heat absorption tower, which realizes the successful transition of a heat absorber on the heat absorption tower through the conversion structure, meets the requirements of strength and rigidity required by the support structure and provides powerful technical support for the future design and application of the heat absorption tower.
The invention also aims to provide a using method of the supporting and converting structure of the tower top heavy-load equipment of the heat absorption tower, and provides an arrangement method for ensuring the structural rigidity of the space steel truss and a connection method for ensuring the bearing capacity of the converting structure and the tower wall.
Therefore, the invention provides a supporting and converting structure of heavy-duty equipment on the top of a heat absorption tower, the heavy-duty equipment is installed on the top of the heat absorption tower through the supporting and converting structure, the heavy-duty equipment comprises a heat absorber and a support steel column, the heat absorber is installed on the supporting and converting structure through the support steel column, the supporting and converting 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 lower chord beam is connected with the lower chord beam, a tower wall beam pit is formed in the top of the tower wall of the heat absorption tower, tower wall brackets are arranged on the inner side wall of the tower wall of the heat absorption tower, the number of the space steel trusses is multiple, the upper chord beam of the multiple space steel trusses is connected to the top of the heat absorption tower through the tower wall beam pit, the top plate is connected to the top surface of the upper chord beam, and the lower chord beam of the multiple space steel trusses is 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 in cross connection with the upper chord beam, and the upper chord beam outer arms of two adjacent space steel trusses are connected through the upper chord connecting beams.
The space steel truss further comprises a plurality of column base rigid support nodes, and the cross area of the upper chord beam and the outer arm of the upper chord beam is connected with 1 column base rigid support node.
The space steel truss further comprises horizontal supports, and the lower chord beams of the plurality of space steel trusses are connected through the horizontal supports.
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 each column base rigid supporting node.
The upper chord beam, the lower chord beam, the web members, the outer arms of the upper chord beam and the upper chord connecting beam 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 column base rigid support node comprises a horizontal reinforcing rib plate and a vertical reinforcing rib plate, the inner sides of the upper flanges and the lower flanges of the cross areas of the upper chord beams and the outer arms of the upper chord beams are both horizontally connected with the horizontal reinforcing rib plate, and the vertical reinforcing rib plate is vertically connected between the upper flanges and the lower flanges of the cross areas of the upper chord beams and the outer arms of the upper chord beams.
The tower wall beam nest is a rectangular lower notch.
The plurality of spatial steel trusses are arranged according to the arrangement mode of the support steel columns, and the upper chord beams and the support steel columns are positioned consistently.
A method for using a supporting and converting structure of heat absorption tower top heavy-load equipment is characterized in that a plurality of spatial steel trusses are arranged according to the arrangement mode of support steel columns in the heavy-load equipment on the top of a heat absorption tower, an upper chord beam and support steel columns are positioned consistently, the lower surface of the upper chord beam is connected with the upper surface of a lower chord beam through web members, the upper chord beam is cantilevered through a tower wall beam pit, overhanging sections are sequentially connected and surrounded through edge sealing beams, the end part of the lower chord beam is connected to the top surface of a tower wall bracket, and a top plate is placed on the upper chord beam.
The invention has the beneficial effects that:
1. the support conversion structure of the tower top heavy-load equipment of the heat absorption tower provided by the invention has the advantages that the self integrity is good, the stability is strong, the internal forces such as bending moment, shearing force and the like are transmitted from the upper part and the lower part by means of the tower wall beam nest and the tower wall bracket respectively, and the advantages of definite, safe and reliable force transmission are realized;
2. according to the support conversion structure of the tower top heavy-load equipment of the heat absorption tower, column base rigid support nodes are arranged in the crossed area of the upper chord beam and the outer arm of the upper chord beam, and the box-shaped column base rigid support nodes firmly fix the column base of the upper heavy-load equipment support.
3. The support conversion structure of the tower top heavy-load equipment of the heat absorption tower can realize factory prefabrication and assembly, and only a small amount of welding or cast-in-place work is needed for high-altitude hoisting. Compared with a common beam type and thick plate type conversion structure, the structure is quicker and more convenient to construct.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a top structural view of an upper chord beam according to one embodiment of the present invention;
FIG. 2 is a top structural view of a lower chord beam according to one embodiment of the present invention;
FIG. 3 is a front view of the structure of the space steel truss;
FIG. 4 is a top view of the structure of a column shoe 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 beam nest structure;
FIG. 7 is a front view of a tower wall beam-nest structure;
FIG. 8 is a front view of a tower wall corbel and lower chord connection.
Description of reference numerals: 1. a space steel truss; 2. a column base rigid support node; 3. an upper chord connecting beam; 4. horizontally supporting; 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. a pedestal bolt; 13. a tower wall beam nest; 14. tower wall corbels; 15. supporting a steel column; 16. and (4) the tower wall of the heat absorption tower.
Detailed Description
Example 1:
as shown in fig. 1, 3, 5-8, a supporting and converting structure of a heavy-duty device on the top of a heat absorption tower, the heavy-duty equipment is arranged on the top of the heat absorption tower through a support conversion structure, the heavy-duty equipment comprises a heat absorber and a support steel column 15, the heat absorber is arranged on the support conversion structure through the support steel column 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 beam 5 and a lower chord beam 6, the lower chord beam 6 is connected below the upper chord beam 5, the tower top of the heat absorption tower wall 16 is provided with a tower wall beam pit 13, the inner side wall of the heat absorption tower wall 16 is provided with a tower wall corbel 14, 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 the tower wall beam pit 13, the top surfaces of the upper chord beams 5 are connected with a top plate 11, and the lower chord beams 6 of the multiple space steel trusses 1 are connected to the top surfaces of the tower wall corbels 14.
The upper chord beam 5 of the support conversion structure of the tower top heavy-duty equipment of the heat absorption tower is cantilevered out of the tower wall 16 of the heat absorption tower through the tower wall beam nest 13 and forms a tower top roof system together with the top plate 11, and the support conversion structure has good integrity and strong stability; part of bending moment, shearing force and axial force borne 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; the rest bending moment, shearing force and axial force borne by the space steel truss 1 are transmitted to the tower wall from the lower part by means of the tower wall brackets 14; has the advantages of definite force transmission, safety and reliability. The top plate 11 is a concrete slab directly placed on the upper chord beam 5, the thickness and the reinforcing bars are determined according to the construction requirements, and the maintenance functions of shielding rain and snow and the like are achieved.
Example 2:
on the basis of the 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 connected with each upper chord beam 5 in a crossing mode, 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 integrally stressed, and the transverse and longitudinal rigidity of the space steel trusses 1 are enhanced.
Further, the space steel truss 1 further comprises a plurality of column base rigid support nodes 2, and the intersection area of the upper chord beam 5 and the upper chord beam outer arm 8 is connected with the 1 column base rigid support node 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-load equipment and transmitting the internal force to the space steel truss 1 structure.
As shown in fig. 2, the space steel truss 1 further includes horizontal supports 4, and the lower chord members 6 of the plurality of space steel trusses 1 are connected by the horizontal supports 4. The lower chord beams 6 of the plurality of space steel trusses 1 are connected by the horizontal support 4 to strengthen the integrity and stability of the lower parts of the space steel trusses 1.
Furthermore, the horizontal supports 4 are arranged in a crossed mode through round steel pipes and are used for being connected with the lower chord beams 6 of the space steel truss 1, the end portions of the horizontal supports 4 are connected in a hinged mode, so that the lower portions of the space steel truss 1 are stressed integrally, the structure is simple, and the transverse rigidity and the longitudinal rigidity of the space steel truss 1 are further enhanced; the hinge joint has high strength, light dead weight and good integrity and seismic performance.
Further, the space steel truss 1 further comprises a plurality of web members 7, the upper chord 5 is connected with the lower chord 6 through the plurality of web members 7, and the web members 7 are arranged below each column base rigid support node 2. And a web member 7 is arranged below the column base rigid supporting node 2 to improve the anti-seismic performance and the deformation capability of the column base rigid supporting node 2.
Furthermore, the upper chord beam 5, the lower chord beam 6, the web members 7, the upper chord beam outer arm 8 and the upper chord connecting 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, large lateral rigidity and strong bending resistance; the upper flange and the lower flange are parallel to each other, so that the connection, processing and installation are simple and convenient, the cost is saved, the structure weight is light, the stability is high, and the structural strength is high.
Further, the column base rigid support node 2 comprises a horizontal reinforcing rib plate 9 and a vertical reinforcing rib plate 10, the horizontal reinforcing rib plate 9 is horizontally connected to the inner side of the upper flange and the inner side of the lower flange of the intersection region of the upper chord beam 5 and the upper chord beam outer arm 8, and the vertical reinforcing rib plate 10 is vertically connected between the upper flange and the lower flange of the intersection region of the upper chord beam 5 and the upper chord beam outer arm 8.
The upper chord beam outer arm 8 is required to be arranged at the column base rigid support node 2, the connection part of the upper chord beam 5 and the web member 7 is properly arranged, the upper chord beam outer arm 8 and the upper chord beam 5 are orthogonal at 90 degrees, the extending 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 stability of the space steel truss 1, the upper chord beam outer arm 8 serves as a part of the column base rigid support node 2, the upper chord beam outer arm 8 can be prefabricated with the space steel truss 1 in an integral factory and serves as a part of the space steel truss 1, and the workload of high-altitude hoisting and installation work is greatly reduced.
As shown in fig. 4, further, the thickness of the horizontal reinforcing floor 9 is greater than or equal to the thickness of the upper flange or the lower flange, the width of the horizontal reinforcing floor 9 is 2/3 of the width of the upper chord 5, the number of the vertical reinforcing floors 10 is multiple, the multiple vertical reinforcing floors 10 are arranged in a triangular or polygonal shape, and the thickness of the vertical reinforcing floor 10 is greater than or equal to the thickness of the web member 7; the design method similar to the 'box shape' can greatly enhance the bending and torsional rigidity of the rigid node, firmly fix the upper bracket and cooperatively deform with the tower top; through "box" rigid support node 2, firmly fix upper portion heat absorber support column base 15, it shows through calculation that, when downwind direction and crosswind direction vibration, upper portion heat absorber equipment can warp with the tower top structure in coordination, satisfies the heat absorber and swings the amplitude limit value in the normal use, obviously reduces because of the adverse effect that vertical rigidity sudden change brought.
Further, the rigid support node 2 further comprises a column base bolt 12, and the column base 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; the connection is convenient, the structure is simple, and the overall stability of the rigid support node 2 is improved.
Furthermore, the quantity of the column base bolts 12 is multiple, and the column base bolts 12 are uniformly and symmetrically distributed on the rigid support node 2, so that the stability of the overall 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 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 larger than that of the upper chord beam 5, the reserved height of the tower wall beam nest 13 is equal to the height of the upper chord beam 5 plus the buckling deformation amount, and 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 notches; the connection stability is improved, the tower wall beam nest 13 stably supports the upper chord beam 5, and partial bending moment, shearing force and axial force borne by the space steel truss are transmitted to the tower wall.
Furthermore, two ends of the lower chord 6 are connected with tower wall brackets 14 through embedded steel 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 the 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, the shearing force and the axial force born by the space steel truss 1 are transmitted to the tower wall.
Further, the plurality of 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 in a consistent mode. The upper chord 5 is positioned in line with the support steel columns 15 to achieve a column base rigid support node.
Furthermore, the plurality of spatial steel trusses 1 are arranged in parallel, and the plurality of spatial steel trusses 1 are symmetrically arranged relative to the circle center of the tower wall 16 of the heat absorption tower, so that column base rigid support nodes are realized, and the seismic performance and the deformation capacity of the nodes are improved.
Further, the section rigidity of the upper chord beam 5 is 1.5-2.0 times of that of the lower chord beam 6; because the upper chord beam 5 is a direct bearing component of the heat absorber support steel column 15, the structure can improve the whole bearing capacity, the shock resistance and the deformation capacity.
Furthermore, the steel truss structure further comprises edge sealing beams, and the upper chord beams 5 of the plurality of spatial steel trusses 1 outside the tower wall beam nest 13 are connected through the edge sealing beams. The upper chord member 5 is through a distance of encorbelmenting of tower wall beam nest 13, adopts the banding roof beam to connect gradually the section of encorbelmenting and encloses into circularly, and this way advantage is first for the wholeness and the fastness of guaranteeing space steel truss 1's upper portion and tower wall connection, and second is with the help of the usage space at space steel truss extension top of the tower in the tower, practices thrift the cost.
Further, the web members 7 comprise oblique web members and vertical web members; the oblique web members and the vertical web members are distributed and arranged as required, the rigidity of the cross section of the oblique web member at the end part of the lower chord beam 6 is about 1.5 times of that of the middle web plate, the stress requirement is met, and the integrity and the firmness of the connection of the space steel truss 1 and the tower wall are further enhanced.
Furthermore, 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 integrally stressed, and the transverse and longitudinal rigidity of the space steel trusses 1 is enhanced.
The support conversion structure of the tower top heavy-load equipment of the heat absorption tower can realize factory prefabrication and assembly, only a small amount of welding or cast-in-place work is needed for hoisting at high altitude, and the structure is quicker and more convenient to construct than a common beam type and thick plate type conversion structure;
the supporting and converting structure of the tower top heavy-load equipment of the heat absorption tower has economical efficiency and practicability in the field of tower photo-thermal power station engineering at home and abroad, and the design method of rigidity and bearing capacity can be applied to the converting structures of other high-rise structures, so that the supporting and converting structure has wide application prospect.
Example 3:
a method for using a supporting and converting structure of a heat absorption tower top heavy-load device is characterized in that a plurality of spatial steel trusses 1 are arranged according to the arrangement mode of support steel columns 15 of an upper heat absorber, wherein an upper chord beam 5 and the support steel columns 15 are positioned in a consistent mode, a web member 7 is arranged below a column base rigid supporting node 2, the upper chord beam 5 is cantilevered through a tower wall beam socket 13, overhanging sections are sequentially connected and surrounded through edge sealing beams, the end portion of a lower chord beam 6 is connected to the top surfaces of tower wall brackets 14, and a top plate 11 is placed on the upper chord beam 5.
The specific design principle of the using method of the invention is as follows: the upper chord beams 5 are positioned to correspond to the steel columns 15 of the upper equipment support one by one as much as possible so as to realize the column base rigid support node 2, and in order to improve the seismic performance and the deformation capacity of the node, a web member 7 (an oblique or vertical web member) needs to be arranged below the column base rigid support node 2; the upper chord beam 5 is a direct bearing component of the heat absorber support steel column 15, the section rigidity of the upper chord beam 5 is 1.5-2.0 times of that of the lower chord beam 6, the upper chord beam 5 is cantilevered for a certain distance through the tower wall beam nest 13, and the overhanging sections are sequentially connected and enclosed into a circle by adopting the edge sealing beam, so that the method has the advantages that the integrity and firmness of the connection of the upper part of the space steel truss and the tower wall are ensured, the use space of the top of the tower is expanded by means of the steel truss in the tower, and the manufacturing cost is saved; the top plate 11 is a concrete plate directly placed on the upper chord beam 5, the thickness and the reinforcing bars are determined according to the structural requirements, and the maintenance functions of shielding rain and snow and the like are achieved; in order to further enhance the integrity and firmness of the connection between the steel truss and the tower wall, the end part of the lower chord beam 6 of the steel truss is supported on the top surface of a bracket of the tower wall, and the section rigidity of the oblique web member at the end part is about 1.5 times that of the middle web plate according to the stress requirement. The application method of the tower top conversion structure provides an arrangement method for ensuring the rigidity of the space steel truss structure and a connection method for ensuring the bearing capacity of the conversion structure and the tower wall, and the steel truss type conversion structure has good applicability and reliability by combining the practical application of projects.
In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "left", "inside", "right", etc., it is based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present invention.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. The utility model provides a support transform structure of heat absorption tower top heavy-duty equipment, heavy-duty equipment installs on the heat absorption tower top of the tower through supporting transform structure, and heavy-duty equipment includes heat absorber and support steel column (15), and the heat absorber passes through support steel column (15) to be installed on supporting transform structure, its characterized in that: the supporting and converting 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 upper chord beam (5) is connected with the lower chord beam (6), a tower wall beam pit (13) is formed in the top of a heat absorption tower wall (16), tower wall corbels (14) are arranged on the inner side wall of the heat absorption tower wall (16), the space steel truss (1) is provided with a plurality of trusses, the upper chord beam (5) of the plurality of space steel trusses (1) is connected to the top of the heat absorption tower through the tower wall beam pit (13), the top plate (11) is connected to the top surface of the upper chord beam (5), and the lower chord beam (6) of the plurality of space steel trusses (1) is connected to the top surface of the tower wall corbel (14).
2. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 1, wherein: the spatial 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 each upper chord beam (5), and the upper chord beam outer arms (8) of two adjacent spatial steel trusses (1) are connected through the upper chord connecting beams (3).
3. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 2, wherein: the space steel truss (1) further comprises a plurality of column base rigid support nodes (2), and the cross area of the upper chord beam (5) and the upper chord beam outer arm (8) is connected with the 1 column base rigid support node (2).
4. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 3, wherein: the spatial steel truss (1) further comprises horizontal supports (4), and lower chord beams (6) of the multi-truss spatial steel truss (1) are connected through the horizontal supports (4).
5. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 4, wherein: the space steel truss (1) further comprises a plurality of web members (7), the upper chord beam (5) is connected with the lower chord beam (6) through the plurality of web members (7), and the web members (7) are arranged below each column base rigid support node (2).
6. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 5, wherein: the upper chord beam (5), the lower chord beam (6), the web members (7), the upper chord beam outer arm (8) and the upper chord connecting 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.
7. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 6, wherein: the column base rigid support node (2) comprises a horizontal reinforcing rib plate (9) and a vertical reinforcing rib plate (10), the inner sides of upper flanges and lower flanges of the cross areas 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 flanges and the lower flanges of the cross areas of the upper chord beam (5) and the upper chord beam outer arm (8).
8. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 7, wherein: the tower wall beam nest (13) is a rectangular lower notch.
9. The structure for supporting and transferring a heavy load device on the top of a heat absorption tower according to claim 1, wherein: the multi-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.
10. A use method of a supporting and converting structure of a tower top heavy-duty device of a heat absorption tower is characterized in that: the method comprises the following steps: the multi-space steel truss (1) is arranged according to the arrangement mode of support steel columns (15) in heavy-duty equipment on the top of a heat absorption tower, 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 cantilevered through a tower wall beam pit (13), overhanging sections are sequentially connected and surrounded and connected through edge sealing beams, the end part of the lower chord beam (6) is connected to the top surface of a tower wall bracket (14), and a top plate (11) is placed on the upper chord beam (5).
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