Mounting, positioning and supporting platform for upper steel structure of heat absorption tower

Abstract

The invention belongs to the technical field of tower type building high-altitude steel structure construction, and provides a heat absorption tower upper steel structure installing, positioning and supporting platform which comprises an upper chord structure and a lower chord structure which are both umbrella-shaped radial structures, the upper chord structure comprises upper chord members, and the lower chord structure comprises lower chord members. Supporting stand columns and internal inclined struts are welded between the upper chord members and the lower chord members; the heat absorption tower upper steel structure installation positioning and supporting platform is installed at the bottom of a lower anchoring box beam installation groove in the top of heat absorption tower concrete through a lower chord member. The heat absorption tower upper steel structure mounting positioning and supporting platform supports a heat absorption tower upper first-layer steel structure through an upper chord, and a positioning base plate is welded between the upper chord and the heat absorption tower upper first-layer steel structure; and a platform bed board for providing an operation space is arranged at the upper part of the heat absorption tower upper steel structure mounting, positioning and supporting platform. The device is simple in structural design and convenient to install and operate on site, the heat absorption tower steel structure hoisting efficiency is improved, and the project construction period is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-altitude steel structure construction of tower buildings, and in particular relates to an installation positioning and support platform for the upper steel structure of a heat absorption tower. Background Art

[0002] Currently, in tower-type solar thermal power plants, the steel structure of the absorber tower plays a crucial role in tower-type solar thermal power plants, serving as the supporting structure for the absorber and the supporting framework for all equipment atop the tower. The absorber steel structure is characterized by complex structural design, high design height, full exposure to air, and high operational safety risks. In particular, when construction reaches the concrete top of the absorber tower and the first layer of the absorber steel structure is being constructed, the concrete top is surrounded by a full-surface structure, with no platforms inside or outside the tower, making it impossible to install the first layer of the absorber steel structure. Therefore, overcoming these unfavorable conditions and ensuring high-quality, safe, and efficient installation of the tower's absorber steel structure presents a significant challenge.

[0003] Currently, there is not much experience and basis for reference in the installation of the steel structure of the upper absorber of the tower of a tower-type solar thermal power station, especially the installation of the steel structure of the first layer of the absorber on the tower. Summary of the Invention

[0004] In order to solve the shortcomings of the existing technology, the present invention provides an installation positioning and support platform for the upper steel structure of the heat absorption tower, which can solve the problem of full open surface and no working platform faced in the installation of the first-layer heat absorber steel structure on the heat absorption tower in the existing technology, and ensure the safety and efficiency of the installation process.

[0005] The present invention adopts the following technical solutions.

[0006] A heat absorbing tower upper steel structure installation positioning and support platform includes an upper chord structure and a lower chord structure, both of which are umbrella-shaped radial structures. The upper chord structure includes an upper chord rod, and the lower chord structure includes a lower chord rod. Support columns and internal diagonal braces are welded between the upper chord rod and the lower chord rod.

[0007] The installation positioning and support platform of the upper steel structure of the heat absorption tower is installed at the bottom of the installation groove of the lower anchor box beam on the concrete top of the heat absorption tower through the lower chord rod; the installation positioning and support platform of the upper steel structure of the heat absorption tower supports the first layer of steel structure on the upper part of the heat absorption tower through the upper chord rod, and a positioning pad is welded between the upper chord rod and the first layer of steel structure on the upper part of the heat absorption tower;

[0008] The upper part of the steel structure installation positioning and support platform of the heat absorption tower is provided with a platform deck providing a working space.

[0009] Furthermore, the lower chord structure further includes a first outer ring connecting beam and a first inner ring connecting beam, and the lower chord includes a first main support chord and a first secondary support chord;

[0010] The first outer ring connecting beam is welded to the first main support chord and the first secondary support chord to form an annular skeleton. The first inner ring connecting beam is welded between adjacent first main support chords to strengthen the rigidity between the first main support chords.

[0011] Furthermore, the number of the first main support chord and the first secondary support chord are both 8, and the upper steel structure installation positioning and support platform of the heat absorption tower are supported on the bottom of the lower anchor box beam installation groove on the concrete top of the heat absorption tower through the outermost ends of the first main support chord and the first secondary support chord.

[0012] Furthermore, the upper chord structure further comprises a second outer ring connecting beam, a second inner ring connecting beam and a deck support secondary beam, and the upper chord comprises a second main support chord and a second secondary support chord;

[0013] The second outer ring connecting beam is welded to the second main support chord and the second secondary support chord to form an annular skeleton. The second inner ring connecting beam is welded between adjacent second main support chords to strengthen the rigidity between the second main support chords.

[0014] A decking support secondary beam is welded between adjacent second main support chords. The decking support secondary beam is located between the second outer ring connecting beam and the second inner ring connecting beam and is used for laying platform decking.

[0015] Furthermore, the number of the second main support chords and the second secondary support chords are both 8, and the first layer of steel structure on the upper part of the heat absorption tower is supported on the outermost ends of the second main support chords and the second secondary support chords.

[0016] Furthermore, the positioning pad is made of steel plate, and the upper chord, lower chord, supporting column and internal diagonal brace are all made of H-shaped steel.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. This invention provides a completely new hoisting solution for the upper steel structure of the heat absorption tower. A mounting, positioning, and support platform is provided on the concrete top of the entire exposed surface. This not only provides a work platform for hoisting the upper structure of the heat absorption tower, especially the upper first floor, but also provides a positioning device for rapid hoisting into place. This greatly improves the hoisting efficiency of the heat absorption tower steel structure and shortens the project construction period.

[0019] 2. The present invention has a simple structural design and is easy to install on site. In addition, the main structure adopts conventional H-shaped steel design and is welded on site, which greatly shortens the platform raw material procurement and on-site installation cycle.

[0020] 3. By laying patterned steel plates on the top of the steel structure installation and positioning and support platform on the upper part of the heat absorption tower, a safe working space is provided for the operators, a temporary material storage site is provided for the hoisting structure, and a work site is provided for the on-site installation of tools and measuring instruments, laying a good foundation for the smooth construction on site.

[0021] 4. The present invention cleverly designs the installation positioning and support platform lower chord to be supported in the concrete installation groove of the anchor box beam under the top of the heat absorption tower, which not only meets the platform support force requirements, but also meets the platform support height requirements, creating good conditions for the optimal use of the platform.

[0022] 5. The installation positioning and support platform provided by the present invention can be used under conditions of different heights and different outer diameters of concrete cylinder walls, and can be extended to the construction applications of steel structures on other high-rise tower structures. It has strong applicability and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation and positioning of the upper steel structure of a heat absorption tower and the assembly of the support platform, the first layer of steel structure on the upper part of the heat absorption tower, and the concrete of the heat absorption tower provided by the present invention;

[0024] Figure 2 This is a top view of the installation, positioning and support platform of the upper steel structure of a heat absorption tower provided by the present invention;

[0025] Figure 3 yes Figure 1 Schematic diagram of the lower chord structure after cutting along AA;

[0026] Figure 4 yes Figure 1 Schematic diagram of the upper chord structure after sectioning along the BB;

[0027] Figure 5 This is a schematic diagram of the installation positioning and support platform structure of the upper steel structure of a heat absorption tower provided by the present invention;

[0028] Figure 6 It is a schematic diagram of simulating on-site stress by using the Stress Ratio stress analysis software of the present invention.

[0029] In the figure: 1-lower chord; 101-first main support chord; 102-first secondary support chord; 2-upper chord; 201-second main support chord; 202-second secondary support chord; 3-first outer ring connecting beam; 4-first inner ring connecting beam; 5-second outer ring connecting beam; 6-second inner ring connecting beam; 7-slab support secondary beam; 8-supporting column; 9-internal diagonal brace; 10-positioning pad; 11-first layer of steel structure on the upper part of the heat absorption tower; 12-upper anchor box beam; 13-anchor bolts; 14-lower anchor box beam; 15-heat absorption tower concrete. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 1 、 2 As shown in Figures 5 and 6, the first-story steel structure 11 of the upper heat absorption tower is hoisted above the concrete 15 of the heat absorption tower. The top elevation of the concrete 15 is EL+211m. Anchor bolts 13 secure the upper anchor box beam 12 and the lower anchor box beam 14. The mounting, positioning, and support platform for the upper steel structure of the heat absorption tower provided by the present invention is installed within the concrete 15 of the heat absorption tower. Its top is used to support the first-story steel structure 11 of the upper heat absorption tower.

[0032] The present invention provides a heat absorption tower upper steel structure installation, positioning, and support platform. The structure is welded together by an upper chord 2, a lower chord 1, support columns 8, internal diagonal braces 9, and positioning pads 10. The internal diagonal braces 9 and support columns 8, primarily composed of H-shaped steel, connect the upper and lower chords and reinforce the platform's rigidity. A positioning pad 10 is welded between the upper chord 2 and the first-story steel structure 11 of the heat absorption tower. The lower chord 1 is supported at the bottom of the mounting groove for the lower anchor box beam 14, located at the top of the heat absorption tower's concrete 15.

[0033] The positioning pad 10 is designed as a machined steel plate of a specific thickness, which serves to adjust the platform elevation and provide positioning and support points for the upper steel structure of the heat absorption tower. Before the hoisting units of the first-layer steel structure 11 on the upper part of the heat absorption tower are put into place, a level is used to level the entire structure. In addition, the positioning axis and positioning radius points of each hoisting unit of the first-layer steel structure 11 on the upper part of the heat absorption tower are pre-marked on the surface of the super-flat positioning pad 10. When the hoisting unit is hoisted to the positioning elevation, the marked axis and positioning radius points are directly used for rapid alignment, thereby achieving the purpose of quickly hoisting the hoisting unit into place, greatly saving the time of hoisting the steel structure into place and improving the hoisting efficiency.

[0034] The first layer of steel structure 11 on the upper part of the heat absorption tower includes A1-A16, a total of 16 axes, and a total of 16 points at the bottom of the structure are evenly distributed and act on the support positions of 16 upper chord rods 2. As can be seen from the layout diagram, since the center of gravity of each lifting unit of the first layer of steel structure 11 on the upper part of the heat absorption tower is biased towards the interior of the heat absorption tower concrete 15, and the other side of the lifting unit is supported on the concrete at the top of the tower, if there is no support inside the tower, the lifting unit will tilt into the tower and cannot be installed normally. The positioning and support platform designed by the present invention cleverly makes a support point for the steel structure lifting unit inside the tower, preventing the steel structure unit from tilting into the tower during the lifting process and becoming unable to be installed.

[0035] like Figure 3 The figure shows a schematic diagram of the lower chord structure provided by the present invention. The lower chord structure includes a lower chord 1, a first outer ring connecting beam 3 and a first inner ring connecting beam 4. The lower chord 1 is mainly composed of H-shaped steel welded together. The lower chord 1 includes 8 first main support chords 101 and 8 first secondary support chords 102. The lower chord 1 is umbrella-shaped and radial, and is formed by 8 first main support chords 101 evenly distributed at 45° intervals. The first outer ring connecting beam 3 welds the first main support chord 101 and the first secondary support chord 102 together to form an annular skeleton. The first inner ring connecting beam 4 is welded between adjacent first main support chords 101 to strengthen the connection between the first main support chords 101. From Figure 1-3 It can be seen that the installation positioning and support platform mainly relies on the outermost ends of the first main and secondary support chords in the lower chord structure, with a total of 16 support points supported on the bottom of the installation groove of the lower anchor box beam 14 on the top of the heat absorption tower concrete 15.

[0036] like Figure 4 The figure shown is a schematic diagram of the upper chord structure provided by the present invention. The upper chord structure includes an upper chord 2, a second outer ring connecting beam 5, a second inner ring connecting beam 6 and a deck support secondary beam 7. The upper chord 2 is mainly composed of H-shaped steel welded together. The upper chord 2 includes 8 second main support chords 201 and 8 second secondary support chords 202. The upper chord 2 is umbrella-shaped and radial, and is formed by 8 second main support chords 201 evenly distributed at 45° intervals. The second outer ring connecting beam 5 is welded to the second main support chord 201 and the second secondary support chord 202 to form an annular skeleton. The second inner ring connecting beam 6 is welded between adjacent second main support chords 201 to strengthen the rigidity between the second main support chords 201. A deck support secondary beam 7 is also welded between adjacent second main support chords 201. The deck support secondary beam 7 is located between the second outer ring connecting beam 5 and the second inner ring connecting beam 6 and is used for laying platform decking. The platform decking is mainly composed of patterned steel plates, which serve to provide a working platform for workers. From Figure 1 、 4It can be seen that the installation positioning and support platform upper chord structure is entirely inside the concrete cylinder wall. Around the platform, it mainly relies on the outermost ends of the second main and secondary support chords in the upper chord structure, with a total of 16 support points to support the first-layer steel structure 11 of the upper part of the heat absorption tower to be hoisted later.

[0037] The design dimensions of the main structure of the positioning and support platform are consistent with the design dimensions of the heat absorption tower concrete 15, and the geometric parameter design of the positioning and support points are consistent with the design dimensions of the installed heat absorption tower upper steel structure 11, meeting the steel structure installation requirements.

[0038] The upper and lower chord main beams of the platform are made of H300x300x10x15, and the secondary beams are made of H150x150x7x10, both made of Q345B low-alloy high-strength carbon structural steel. To ensure that the platform's deflection and stiffness meet the stress requirements after installation, the stress analysis software is used to simulate the actual stress state during on-site use based on the external input load provided. Figure 6 As shown, the mounting, positioning, and support platform provided by the present invention has an initial design weight of 37,000 kg and a maximum load capacity of 96,000 kg. A uniformly distributed load F1 of 3 kN / m2 is applied across the entire platform surface. A concentrated load F2 of 60 kN is applied to 16 support points around the platform's upper chord, supporting the first-level steel structure of the upper heat absorption tower. Stress analysis using StressRatio analysis software revealed a maximum platform deflection of 13.65 mm, while the design allowable deflection is 55.33 mm, demonstrating that the platform design meets requirements.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A heat absorbing tower upper steel structure installation positioning and support platform, including an upper chord structure and a lower chord structure, characterized by: The upper chord structure and the lower chord structure are both umbrella-shaped radial structures, the upper chord structure includes an upper chord rod (2), the lower chord structure includes a lower chord rod (1), and a supporting column (8) and an internal diagonal brace (9) are welded between the upper chord rod (2) and the lower chord rod (1); The installation positioning and support platform for the upper steel structure of the heat absorption tower is installed at the bottom of the installation groove of the lower anchor box beam (14) on the top of the heat absorption tower concrete (15) through the lower chord rod (1); the installation positioning and support platform for the upper steel structure of the heat absorption tower supports the first layer steel structure (11) of the upper part of the heat absorption tower through the upper chord rod (2), and a positioning pad (10) is welded between the upper chord rod (2) and the first layer steel structure (11) of the upper part of the heat absorption tower; The upper part of the steel structure installation positioning and support platform of the heat absorption tower is provided with a platform deck providing a working space.

2. The installation, positioning and support platform for the upper steel structure of a heat absorption tower according to claim 1, characterized in that: The lower chord structure further comprises a first outer ring connecting beam (3) and a first inner ring connecting beam (4), and the lower chord comprises a first main supporting chord (101) and a first secondary supporting chord (102); The first outer ring connecting beam (3) is welded to the first main support chord (101) and the first secondary support chord (102) to form an annular skeleton, and the first inner ring connecting beam (4) is welded between adjacent first main support chords (101) to strengthen the rigidity between the first main support chords (101).

3. The installation, positioning and support platform for the upper steel structure of a heat absorption tower according to claim 2, characterized in that: The number of the first main support chords (101) and the first secondary support chords (102) are both 8, and the upper steel structure installation positioning and support platform of the heat absorption tower is supported on the bottom of the installation groove of the lower anchor box beam (14) at the top of the heat absorption tower concrete (15) through the outermost ends of the first main support chords (101) and the first secondary support chords (102).

4. The installation, positioning and support platform for the upper steel structure of a heat absorbing tower according to claim 1, characterized in that: The upper chord structure further comprises a second outer ring connecting beam (5), a second inner ring connecting beam (6) and a deck support secondary beam (7), and the upper chord (2) comprises a second main support chord (201) and a second secondary support chord (202); The second outer ring connecting beam (5) is welded to the second main support chord (201) and the second secondary support chord (202) to form an annular skeleton, and a second inner ring connecting beam (6) is welded between adjacent second main support chords (201) to strengthen the rigidity between the second main support chords (201); A decking support secondary beam (7) is welded between adjacent second main support chords (201). The decking support secondary beam (7) is located between the second outer ring connecting beam (5) and the second inner ring connecting beam (6) and is used for laying platform decking.

5. The installation, positioning and support platform for the upper steel structure of a heat absorbing tower according to claim 4, characterized in that: The number of the second main support chords (201) and the second secondary support chords (202) are both 8, and the first layer of steel structure (11) on the upper part of the heat absorption tower is supported on the outermost ends of the second main support chords (201) and the second secondary support chords (202).

6. The installation, positioning and support platform for the upper steel structure of a heat absorbing tower according to claim 1, characterized in that: The positioning pad (10) is made of steel plate, and the upper chord (2), lower chord (1), supporting column (8) and internal diagonal brace (9) are all made of H-shaped steel.

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