Hoisting gantry of heat absorber

Abstract

The invention provides a heat absorber hoisting portal which comprises a flange base, supporting legs, a crane, a hydraulic crane operating platform, a steel strand guide pipe, a steel strand support and connecting pieces, the supporting legs are arranged above the flange base, and the crane, the crane operating platform, the steel strand guide pipe and the steel strand support are installed on the supporting legs. The heat absorber hoisting portal frame is applied to overall sliding hoisting of a heat absorber, and the overall sliding hoisting scheme can reduce the working procedures of aloft work, reduce the risk of falling from high altitude, shorten the working time on a tower and reduce the cross working amount at the bottom of the tower.

Description

[0001] This application is a divisional application of Chinese patent application number 2020112224282, invention name “A Heat Absorber Lifting Gantry”, and application date November 5, 2020, the contents of which are incorporated herein by reference. Technical Field

[0002] The invention relates to the technical field of heat absorber installation, in particular to a heat absorber hoisting door frame. Background Art

[0003] Tower molten salt solar thermal power generation technology has been commercialized on a large scale due to its advantages of high concentration ratio, high photothermal conversion efficiency, continuous power generation at night, and autonomous peak regulation.

[0004] The main construction areas of a solar thermal power station are divided into the mirror field area and the power island area. The power island area is the core of the entire power station. All regular solar energy will be collected into the heat absorber on the core building of the power island - the light tower, thereby converting solar energy into thermal energy of molten salt. When the molten salt exchanges heat with water, steam is generated to generate electricity. The light tower is a tall building, generally more than 190 meters high. It is different from the chimney of an ordinary thermal power plant in that it is a comprehensive structure that integrates structure, equipment, pipelines, insulation, heat absorption, and elevators, and is difficult to construct.

[0005] In existing technology, most mechanisms and equipment construction are hoisted using an external tower crane. The heat absorber steel frame is generally a non-independent, all-steel structure. During the overall structural model and construction process, the lower portion of the steel frame is supported on the top of the concrete tower at a certain height above the ground and bolted to the steel beam at the top of the concrete tower. The heat absorber steel frame has a cylindrical structure, with 16 main load-bearing columns arranged cylindrically inside the molten salt heat absorber. Four additional steel columns inside serve as elevator shafts and support the rotating crane equipment at the top. The heat absorber steel frame column feet are bolted to the supporting steel beam at the top of the concrete tower. Before pouring the tower top floor slab on site, the bolts used to connect the heat absorber steel frame column feet need to be fixed to the supporting steel beam. The bolts require additional protection to prevent damage to the bolts and threads. During installation, the components must be securely connected to ensure safety and reliability under dead loads, wind loads, seismic effects, and installation loads. Current hoisting solutions cannot guarantee this.

[0006] In addition, all the details related to tower crane selection and installation require comprehensive demonstration and planning, making it difficult to obtain a scientific, reasonable, and economical mechanical equipment and installation plan, which slows down the construction progress of the optical tower and increases the construction cost. Specifically, there are the following typical technical problems: 1. The selection of tower cranes is complicated, including the selection of maximum lifting capacity, maximum lifting height, and boom length. The selection process is complicated and it is difficult to choose the most economical and effective tower crane. 2. The tower crane needs to be inspected, repaired, and modified before installation. It also needs to be installed with tower crane attachments. The selection of jacking time is difficult to coordinate with the construction period. In order to ensure the high reliability of the hoisting machinery and the shortest hoisting time, the impact of the tower crane jacking work on the project period is minimized. 3. In order to save time for personnel going up and down and preserve the physical strength of jacking workers, it is necessary to design a separate access walkway, which needs to be dismantled later, thereby increasing project losses and reducing work efficiency; 4. The tower crane hoisting project is risky. The tower crane hoisting machine is set on the top of the concentrated heat absorption system, and the layout height is about 220m. It is large in size and it is difficult to ensure that the heavy heat absorber to be hoisted can be reliably suspended on the top before being assembled on the top of the concentrated heat absorption system.

[0007] Even if the internal hoisting method is adopted, there is no mature and reliable hoisting gantry solution in the current existing technology. Therefore, it is necessary to study a new absorber hoisting gantry so that the absorber can be reliably hoisted to the top of the light tower, thereby solving one or more of the above-mentioned technical problems. Summary of the Invention

[0008] In order to solve one or more technical problems in the prior art, the present invention provides a heat absorber hoisting gantry, which is composed of 16 hoisting gantry evenly distributed in a ring shape and erected on the top of the heat absorption tower. Each hoisting gantry includes: a flange base, support legs, a crane, a crane operating platform, a steel strand conduit, a steel strand bracket, and connectors; A support leg is provided above the flange base, on which a crane, a crane operating platform, a steel strand conduit and a steel strand bracket are installed; two support feet are respectively provided on both sides of the support leg and are fixedly connected to the support flange by bolts and nuts; The crane operating platform includes a platform body, a platform ladder, a handrail, and a platform support body. The platform support body is supported below the platform body and is in the shape of an elongated arc. The steel strand conduit is embedded and installed on one side of the platform support. The steel strand conduit is funnel-shaped as a whole, with a large upper part and a small lower part at the top. The steel strand bracket is installed on the platform body and has a funnel-shaped opening for conveying steel strands on the side opposite to the crane. The opening is completely consistent with the rigid opening size of the steel strand conduit, and the axis of the steel strand conduit is flush with one end of the steel strand bracket.

[0009] In one or some optional embodiments, the flange base includes a flange base body and embedded parts. The flange base body and the embedded parts are connected by bolts. The embedded parts are arranged at an elevation of 220m of the heat absorption tower.

[0010] In one or some optional embodiments, the embedded part is an embedded steel plate, and a plurality of rigid legs extend from the lower end of the embedded steel plate, and the rigid legs are embedded in the concrete base.

[0011] In one or some optional embodiments, during the installation process of the flange base, it is necessary to ensure that it is flat and level with the surface of the embedded steel plate.

[0012] In one or some optional embodiments, the crane is a hydraulic crane.

[0013] In one or some optional embodiments, the hydraulic crane is installed on the platform body, and the platform support body is connected to the support legs through bolts and nuts, and is also connected to the platform body through bolts and nuts of the same specifications.

[0014] In one or some optional embodiments, the lower part of the steel strand conduit is a multi-section flexible tube, the diameter of the flexible tube is the same as the minimum diameter of the rigid opening, the uppermost flexible tube is provided with a connector connected to the platform support body, and part of the flexible tube is arc-shaped, so that the lower end of the lowermost flexible tube is positioned closer to the outside of the top of the heat absorption tower than the uppermost flexible tube. In one or some optional embodiments, an arc-shaped opening is provided in the middle of the platform support body as an installation location for the crane and the steel strand driven by it; In one or some optional embodiments, a platform ladder is provided on one side of the platform body, and an operator can climb onto the crane operating platform via the platform ladder.

[0015] In one or some optional embodiments, the platform support body is connected to the support legs through φ24*120 half-thread bolts and nuts, and is also connected to the platform body through φ24*120 half-thread bolts and nuts.

[0016] In one or some optional embodiments, the platform main body is installed outside the platform support body, and side panels are respectively provided at both ends of the platform support body to increase the support strength.

[0017] In one or some optional embodiments, the legs are M-shaped legs.

[0018] In one or some optional embodiments, the M-shaped legs ensure reliable weight support, and the two legs are fixedly connected to the support flange by φ24*120 half-thread bolts and nuts.

[0019] In one or some optional embodiments, the absorber hoisting gantry can ensure that the absorber hoisting gantry is installed at an elevation of 220m of the absorber tower and is safe and reliable under conditions of dead load, wind load, earthquake action and installation load.

[0020] Compared with the prior art, the present invention has one or more of the following technical effects: 1) The hoisting gantry device used has a simple structure, and the hoisting components are small in size and light in weight, which can ensure safe construction and simple construction process; 2) During the hoisting process, there is no need to consider the various details of the transfer equipment selection and installation, so that a scientific, reasonable and economical heat absorber hoisting machinery equipment and installation plan can be obtained through hydraulic hoisting, which improves the construction progress of the light tower and significantly reduces the construction cost.

[0021] 3) It can efficiently and reliably complete the precise lifting and positioning of the heat absorber from the assembly plant to the top of the light tower. It can perform calculations and controls based on actual working conditions, and adjust equipment parameters in real time, with high flexibility.

[0022] 4) The hoisting gantry of the heat absorber is applied to the heat absorber and then hoisted as a whole by sliding. The overall sliding hoisting solution can reduce the number of high-altitude work processes and reduce the risk of falling from heights. Since the working time on the tower is greatly shortened, the cross-operation at the bottom of the tower is reduced. The overall sliding hoisting construction solution saves 220 days (construction period advantage) compared to the traditional high-altitude scattered assembly, reduces the use time and labor costs of a large amount of large lifting equipment, and hoists all components on the ground for assembly, reducing a large amount of high-altitude work and reducing the number of construction personnel. The number of construction personnel input is reduced by 3,900 people / days compared to conventional methods, and the cost is also greatly reduced accordingly, reducing the difficulty of construction (cost advantage). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to understand the details of the above features of the present invention, reference may be made to the embodiments for a more detailed description of the invention briefly summarized above. The accompanying drawings relate to preferred embodiments of the present invention and are described below: Figure 1 This is a rendering of a gantry installation on the top of a light tower according to a preferred embodiment of the present invention; Figure 2 Schematic diagram of the structure of each separate hoisting gantry according to a preferred embodiment of the present invention; Figure 3a Schematic diagram of the flange base structure according to a preferred embodiment of the present invention; Figure 3b This is a schematic diagram of the installation structure of the flange base 2 according to a preferred embodiment of the present invention; Figure 4 is a structural schematic diagram of a support leg according to a preferred embodiment of the present invention; Figure 5a Schematic diagram of the structure of a hydraulic crane operating platform according to a preferred embodiment of the present invention; Figure 5b Schematic diagram of the platform support structure according to a preferred embodiment of the present invention; Figure 5c Schematic diagram of the assembly structure of the platform body and the platform support body according to a preferred embodiment of the present invention; Figure 6a Schematic diagram of the assembly structure of the steel strand conduit 6 embedded and installed on one side of the platform support body 54 according to a preferred embodiment of the present invention; Figure 6b Schematic diagram of the steel strand conduit structure according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0024] Various embodiments will now be described in detail, with one or more examples of these embodiments being illustrated in the figures. Each example is provided by way of explanation and is not meant to be limiting. For example, features illustrated or described as part of one embodiment can be used or combined with any other embodiment to produce yet another embodiment. The present invention is intended to encompass such modifications and variations.

[0025] In the following description of the drawings, the same reference numerals indicate the same or similar components. Generally, only the differences between individual embodiments will be described. Unless otherwise explicitly stated, the description of a part or aspect in one embodiment can also apply to the corresponding part or aspect in another embodiment.

[0026] like Figure 1 The figure shows the effect of the top hoisting gantry of the light tower. The top hoisting gantry of the heat absorption tower consists of 16 separate hoisting gantry frames 1. Figure 2 The schematic diagram of the structure of each individual lifting gantry is shown, wherein each individual gantry includes: a flange base 2, a support leg 3, a crane 4, a hydraulic crane operating platform 5, a steel strand conduit 6, a steel strand bracket 7 and connecting parts. The support leg 3 is arranged above the flange base 2, and the crane 4, the crane operating platform 5, the steel strand conduit 6 and the steel strand bracket 7 are installed on the support leg 3.

[0027] like Figure 3a The flange base 2 is shown in the structural diagram. The flange base 2 includes a flange base body 21 and an embedded part 22. The flange base body 21 and the embedded part 22 are connected by bolts. In this embodiment, the embedded part is an embedded steel plate. A plurality of rigid legs extend from the lower end of the embedded steel plate. The legs need to be embedded in the concrete base. At the same time, the flatness and levelness of the embedded steel plate surface need to be ensured during the installation of the flange base. Figure 3b As shown in the schematic diagram of the installation structure of the flange base 2, the flange base 2 needs to be installed in advance. In this embodiment, the installation of the flange at the bottom of the absorber gantry is the basis of the entire installation work, and its installation accuracy directly affects the positioning of the gantry and the center position of the hydraulic crane 4.

[0028] like Figure 4As shown in the structural diagram of the support leg 3, in this embodiment, an M-shaped support leg is used to ensure reliable weight support. There are two support feet on both sides of the support leg, which are fixedly connected to the support flange 2 by 10.9-level φ24*120 half-thread bolts + nuts to reduce pressure.

[0029] In this embodiment, the crane 4 is a hydraulic crane device, and its installation instructions are described in detail in the heat absorber lifting plan, and can also be found in the instructions of commercially available products.

[0030] like Figure 5a The hydraulic crane operating platform 5 shown includes a platform body 51 , a platform ladder 52 , a railing 53 and a platform support 54 , wherein the operator climbs onto the operating platform via the platform ladder 52 on one side of the platform body 51 , and the platform support 54 is supported below the platform body 51 .

[0031] like Figure 5b The platform support 54 is shown as an elongated arc with a central arc-shaped opening for mounting the hydraulic crane and its driven strand jack. The hydraulic crane is mounted on the platform body. The handrail material and configuration are determined by the client's requirements, while the ladder is determined by the client and the civil engineering requirements. The platform support 54 is connected to the legs 4 using 10.9-grade φ24*120 semi-thread bolts and nuts. It is also connected to the platform body 51 using 10.9-grade φ24*120 semi-thread bolts and nuts.

[0032] like Figure 5c In the embodiment shown, the platform body 51 is partially extended outside the platform support body 54, which reduces the use of consumables and saves engineering effort while ensuring strength. Side panels are provided at both ends of the platform support body 54 to increase support strength.

[0033] like Figure 6a The steel strand conduit 6 is embedded and installed on one side of the platform support 54. Figure 6b The strand conduit 6 is shown in a schematic diagram. It is funnel-shaped, with a large, rigid opening at the top and a smaller one at the bottom. The lower section consists of multiple sections of flexible tubing, each with a diameter equal to the smallest diameter of the rigid opening. The uppermost section of the flexible tubing is connected to the platform support 54 using a connector, in this embodiment, made of channel steel and high-strength bolts or screws. The position of the lowermost section is determined by civil construction and project-specific requirements. The axis of the strand conduit 6 is aligned with one end of the strand support 7, feeding the strands.

[0034] The structure of the steel strand support 7 is as follows Figure 1 and 2As shown, the strand jack (PPU) is mounted on the platform body 51. On the side opposite the jack, a funnel-shaped opening for conveying the strands is located. This opening is identical in size to the opening of the strand conduit 6. The lifting axis is aligned with the heat absorber lifting lug. The strand jack (PPU) is positioned based on this lifting axis.

[0035] In this embodiment, the hoisting weight is 6000KG, excluding jacks, steel strands, FAH or steel strand brackets. The specific construction sequence is: gantry ground assembly, bottom support flange in place, gantry hoisting in place and adjustment.

[0036] 1. Mast bottom assembly 1. Mast assembly: This is done at the assembly site. Before assembly, check that the dimensions and numbering of each component match the drawings. The dimensions are then reviewed after the flange installation acceptance. The assembly sequence is as follows: first assemble the outriggers 3, then bolt them to the hydraulic crane mounting platform 5. Finally, install the crossbeam upper platform ladder 52, handrails 53, and strand conduit 6, along with other ancillary structures.

[0037] 2. Assembly of support legs 3: This is the focus of the entire assembly work. Use two base support flanges 2 to pre-assemble with support legs 3 on the ground, and then connect and fix the two flanges with channel steel to ensure that the subsequent base flange installation accuracy meets the bolt installation requirements. Before welding, check and adjust the verticality of the column, the horizontality and spacing of the upper flange.

[0038] 3. After the 16 gantries were assembled, they were transported using a flatbed truck to the lifting area beneath the 20t tower crane of the heat absorption tower. After the support flanges passed inspection, they were hoisted into place one by one and all bolts were tightened. After completion, all gantries' installation dimensions and bolt torques were reviewed and confirmed correct before submitting for inspection. To prevent wind-induced swaying during the hoisting process, after the gantries were aligned, the 16 gantries were bolted together using #20 I-beams. For ground assembly, the gantries and I-beam connecting lugs were machined and welded to the gantries and I-beams.

[0039] 4. Carry out relevant verification calculations on the hoisting gantry base plate and gantry design.

[0040] 2. The installation procedure for placing the bottom support flange is as follows: 1. Check the embedded parts for the door frame installation at the elevation of 220m of the heat absorption tower, remove the debris on the surface of the embedded steel plate, and check the flatness and levelness of the surface of the embedded steel plate.

[0041] 2. Bottom support flange installation: Clean the upper surface of the bottom support flange and use a 20T construction crane to place 32 pieces of 16 portals, with 2 bottom support flanges per portal, on the embedded steel plate.

[0042] 3. Draw vertical and horizontal centerlines on the upper surface of the bottom support flange, using the bolt holes as a reference. Measure and adjust the bolt diagonal and spacing dimensions, height, and levelness of adjacent support flanges. Strictly align the center of the hydraulic crane platform with the centerline of the heat sink support, ensuring that all dimensional errors are within 3mm. Once these requirements are met, secure by spot welding. After all spot welding is complete, review the above data for changes. Once confirmed, weld the bottom support flange to the embedded steel plate. During welding, be careful to control deformation and check for changes in the level of the upper flange.

[0043] The lifting gantry device used in this embodiment features a simple structure, small lifting components, and lightweight construction methods, ensuring safe construction and simplifying the construction process. The lifting process eliminates the need to consider the various details of transfer equipment selection and installation. This results in a scientific, rational, and economical heat absorber lifting machinery and installation solution through hydraulic lifting, accelerating tower construction progress and significantly reducing construction costs. The system efficiently and reliably completes the precise lifting and positioning of the heat absorber from the assembly plant to the top of the tower. Calculations and control can be performed based on actual working conditions, allowing for real-time adjustment of equipment parameters, resulting in high flexibility. The heat absorber lifting gantry is then applied to the heat absorber and then hoisted in a sliding manner. This overall sliding lifting solution reduces overhead work steps and mitigates the risk of falls. This significantly shortens work time at the tower and reduces cross-work at the tower base. This overall sliding lifting construction solution saved 220 days (a construction time advantage) compared to traditional high-altitude assembly, reducing the time and labor costs associated with the use of large lifting equipment. All components are hoisted and assembled on the ground, eliminating significant overhead work and reducing the number of construction personnel required. The number of construction workers is reduced by 3,900 man-days compared to conventional methods, the cost is also greatly reduced accordingly, and the construction difficulty is reduced (cost advantage).

[0044] While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope of the invention, which is defined by the following claims.

[0045] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Technical features in these embodiments that do not conflict with each other may be combined. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat absorber hoisting gantry, characterized in that: The heat absorber lifting gantry consists of 16 circular lifting gantry evenly distributed on the top of the heat absorption tower. Each lifting gantry includes: flange base, support legs, crane, crane operating platform, steel strand conduit, steel strand bracket and connectors; A support leg is provided above the flange base, on which a crane, a crane operating platform, a steel strand conduit and a steel strand bracket are installed; two support feet are respectively provided on both sides of the support leg and are fixedly connected to the support flange by bolts and nuts; The crane operating platform includes a platform body, a platform ladder, a handrail, and a platform support body. The platform support body is supported below the platform body and is in the shape of an elongated arc. The steel strand conduit is embedded and installed on one side of the platform support. The steel strand conduit is funnel-shaped as a whole, with a large upper part and a small lower part at the top. The steel strand support is installed on the platform body on the side opposite to the crane and is provided with a funnel-shaped opening for conveying the steel strand. The opening is exactly the same size as the rigid opening of the steel strand conduit, and the axis of the steel strand conduit is flush with one end of the steel strand support. Preferably, the flange base includes a flange base body and embedded parts, the flange base body and the embedded parts are connected by bolts, and the embedded parts are arranged at an elevation of 220m of the heat absorption tower; Preferably, the embedded part is an embedded steel plate, and a plurality of rigid legs extend from the lower end of the embedded steel plate, and the rigid legs are embedded in the concrete base; Preferably, during the installation process of the flange base, it is necessary to ensure its flatness and levelness with the surface of the embedded steel plate.

2. The heat absorber hoisting gantry according to claim 1, characterized in that: The crane adopts hydraulic crane.

3. The heat absorber hoisting gantry according to claim 2, characterized in that: The hydraulic crane is installed on the platform body, and the platform support body is connected to the outriggers through bolts and nuts, and is also connected to the platform body through bolts and nuts of the same specifications.

4. The heat absorber hoisting gantry according to claim 1, characterized in that: The lower part of the steel strand conduit is composed of multiple sections of flexible pipes. The diameter of the flexible pipes is the same as the minimum diameter of the rigid opening. The uppermost flexible pipe is provided with a connector connected to the platform support body. Some of the flexible pipes are arc-shaped, so that the lower end of the lowermost flexible pipe is positioned closer to the outside of the top of the heat absorption tower than the uppermost flexible pipe.

5. The heat absorber hoisting gantry according to claim 1, characterized in that: An arc-shaped opening is provided in the middle of the platform support body as the installation position of the crane and the steel strand it drives.

6. The heat absorber hoisting gantry according to claim 1, characterized in that: A platform ladder is provided on one side of the platform body, through which the operator can climb onto the crane operating platform.

7. The heat absorber hoisting gantry according to claim 6, characterized in that: The platform support body is connected to the support legs through φ24*120 half-thread bolts and nuts, and is also connected to the platform body through φ24*120 half-thread bolts and nuts.

8. The heat absorber hoisting gantry according to claim 7, characterized in that: The main body of the platform is installed outside the platform support body, and side panels are provided at both ends of the platform support body to increase the support strength.

9. The heat absorber hoisting gantry according to claim 1, characterized in that: The outriggers adopt M-shaped outriggers; Preferably, the M-shaped legs ensure reliable weight support, and the two legs are fixedly connected to the support flange by φ24*120 half-thread bolts and nuts.

10. The heat absorber hoisting gantry according to claim 1, characterized in that: It can ensure that the absorber lifting gantry is installed at the absorption tower elevation of 220m and is safe and reliable under the conditions of dead load, wind load, earthquake and installation load.

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