Heat absorber lifting gantry

Abstract

A heat absorber lifting gantry is provided, comprising: a flange base, support legs, a crane, a hydraulic crane operating platform, a steel strand conduit, a steel strand bracket and connecting parts. The support legs are arranged above the flange base, and the crane, the crane operating platform, the steel strand conduit and the steel strand bracket are installed on the support legs.

Description

Technical Field

[0001] The invention relates to the technical field of heat absorber installation, in particular to a heat absorber hoisting door frame. Background Art

[0002] 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.

[0003] 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.

[0004] 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.

[0005] 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:

[0006] 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.

[0007] 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.

[0008] 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;

[0009] 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.

[0010] 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

[0011] In order to solve one or more technical problems in the prior art, the present invention provides a heat absorber hoisting gantry, comprising: a flange base (2), a support leg (3), a crane (4), a crane operating platform (5), a steel strand conduit (6), a steel strand support (7) and a connecting piece, wherein 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 support (7) are installed on the support leg (3).

[0012] According to another aspect of the present invention, the flange base (2) comprises a flange base body (21) and an embedded part (22), and the flange base body (21) and the embedded part (22) are connected by bolts.

[0013] According to another aspect of the present invention, the embedded part is an embedded steel plate, and 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 surface flatness and horizontality of the embedded steel plate need to be ensured during the installation of the flange base.

[0014] According to another aspect of the present invention, the support leg (3) adopts an M-shaped support leg to ensure reliable weight support, and two support feet are respectively provided on both sides of the support leg and fixedly connected to the support flange (2) through 10.9-level φ24*120 semi-thread bolts + nuts.

[0015] According to another aspect of the present invention, the crane (4) adopts MSR (heat sink) hydraulic crane equipment.

[0016] According to another aspect of the present invention, the crane operating platform (5) includes a platform body (51), a platform ladder (52), a railing (53) and a platform support body (54), wherein an operator climbs onto the operating platform via the platform ladder (52) on one side of the platform body (51), and the platform support body (54) is supported below the platform body (51).

[0017] According to another aspect of the present invention, the platform support body (54) is in the shape of an elongated arc, with an arc-shaped opening in the middle serving as the installation position for the hydraulic crane and the steel strand jack driven by it. The hydraulic crane is installed on the platform body, and the platform support body (54) is connected to the support legs (4) through 10.9-level φ24*120 half-thread bolts + nuts, and is also connected to the platform body (51) through 10.9-level φ24*120 half-thread bolts + nuts.

[0018] According to another aspect of the present invention, the platform body (51) is partially extended outward from the platform support body (54) for installation, and side panels are respectively provided at both ends of the platform support body (54) to increase support strength.

[0019] According to another aspect of the present invention, the steel strand conduit (6) is embedded and installed on one side of the platform support body (54). The steel strand conduit (6) is funnel-shaped as a whole, with the upper part being a large-upper-small-lower-funnel-shaped rigid opening, and the lower part being 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 to the platform support body (54), and the position of the lowermost flexible tube is determined according to the civil construction requirements and the specific requirements of the project. The axis of the steel strand conduit (6) is flush with one end of the steel strand bracket (7) to transport the steel strand.

[0020] According to another aspect of the present invention, the steel strand support (7) is installed on the platform body (51), and a funnel-shaped opening for conveying the steel strand is opposite to the side of the jack, and the opening is completely consistent with the opening size of the steel strand conduit (6).

[0021] Compared with the prior art, the present invention has one or more of the following technical effects:

[0022] 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;

[0023] 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.

[0024] 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.

[0025] 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

[0026] 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:

[0027] 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;

[0028] Figure 2 Schematic diagram of the structure of each separate hoisting gantry according to a preferred embodiment of the present invention;

[0029] Figure 3 a is a schematic diagram of the flange base structure according to a preferred embodiment of the present invention;

[0030] Figure 3 b is a schematic diagram of the installation structure of the flange base 2 according to a preferred embodiment of the present invention;

[0031] Figure 4 is a structural schematic diagram of a support leg according to a preferred embodiment of the present invention;

[0032] Figure 5 a is a schematic structural diagram of a hydraulic crane operating platform according to a preferred embodiment of the present invention;

[0033] Figure 5 b is a schematic diagram of the platform support structure according to a preferred embodiment of the present invention;

[0034] Figure 5 c is a schematic diagram of the assembly structure of the platform body and the platform support body according to a preferred embodiment of the present invention;

[0035] Figure 6a is a 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;

[0036] Figure 6 b is a schematic diagram of the steel strand conduit structure according to a preferred embodiment of the present invention. Specific embodiments

[0037] 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.

[0038] 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.

[0039] 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 is composed of 16 independent hoisting gantry 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.

[0040] like Figure 3 The flange base 2 is shown in a as a structural diagram. The flange base 2 includes a flange base body 21 and embedded parts 22. The flange base body 21 and the embedded parts 22 are connected by bolts. In this embodiment, the embedded parts are embedded steel plates. A plurality of rigid legs extend from the lower end of the embedded steel plates. 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 3 b is a 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 flange installation at the bottom of the heat 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.

[0041] 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.

[0042] 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.

[0043] like Figure 5 The hydraulic crane operating platform 5 shown in a includes a platform body 51, a platform ladder 52, a railing 53 and a platform support body 54, wherein the operator climbs onto the operating platform through the platform ladder 52 on one side of the platform body 51, and the platform support body 54 is supported below the platform body 51.

[0044] like Figure 5 The platform support 54 shown in b is 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.

[0045] like Figure 5 In the embodiment shown in Figure c, the platform body 51 is partially extended outside the platform support 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 54 to increase support strength.

[0046] like Figure 6 The steel strand conduit 6 shown in a is embedded and installed on one side of the platform support body 54. Figure 6 The strand conduit 6, shown in Figure b, is funnel-shaped, with a rigid opening at the top and a smaller opening 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 flexible tubing is connected to the platform support 54 using a connector. In this embodiment, the connector is a steel channel with high-strength bolts or screws. The position of the lowermost flexible tubing is determined by civil construction requirements and specific project specifications. The axis of the strand conduit 6 is aligned with one end of the strand support 7, conveying the strands.

[0047] 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.

[0048] 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.

[0049] 1. Mast bottom assembly

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 4. Carry out relevant verification calculations on the hoisting gantry base plate and gantry design.

[0054] 2. The installation procedure for placing the bottom support flange is as follows:

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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).

[0059] 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.

[0060] 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, ensuring safety and reliability under dead load, wind load, earthquake action and installation load at a heat absorber tower elevation of 220m, characterized by: 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; the support leg adopts an M-shaped support leg, and two feet on each side of the support leg are fixedly connected to the support flange by bolts and nuts; the flange base includes a flange base body and embedded parts, which are connected to the embedded parts by bolts, and the embedded parts are provided at an elevation of 220m from the heat absorption tower; The crane operating platform includes a platform body, a platform ladder, a handrail, and a platform support. A platform ladder is provided on one side of the platform body. The platform support is supported below the platform body. The platform support is in the shape of an elongated arc with an arc-shaped opening in the middle as the installation position for the crane and the steel strand it drives. The steel strand conduit is embedded and installed on one side of the platform support body. The steel strand conduit is funnel-shaped as a whole, with a larger upper part and a smaller lower part funnel-shaped rigid opening at the top, and multiple sections of flexible pipes at the bottom. 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, and 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. The axis of the steel strand conduit is flush with one end of the steel strand bracket; the steel strand bracket is installed on the platform body, and a funnel-shaped opening for conveying the steel strand is provided on the side opposite to the crane, and the opening is exactly the same size as the opening of the steel strand conduit.

2. The heat absorber hoisting gantry according to claim 1, characterized in that: The embedded parts are embedded steel plates with multiple rigid legs extending from the lower end. The legs need to be embedded in the concrete base.

3. The heat absorber hoisting gantry according to claim 2, characterized in that: During the installation of the flange base, it is necessary to ensure that it is flat and level with the surface of the embedded steel plate.

4. The heat absorber hoisting gantry according to claim 1, characterized in that: The M-type legs ensure reliable weight support, and the two legs are connected by φ24 120 half-thread bolts and nuts are fixed to the support flange to reduce pressure.

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

6. The heat absorber hoisting gantry according to claim 5, characterized in that: Operators can climb onto the operating platform via the platform ladder on one side of the platform body.

7. The heat absorber hoisting gantry according to claim 6, 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.

8. The heat absorber hoisting gantry according to claim 6, 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.

Images