Air-cooling island modular tube bundle component integral assembly and hoisting construction method

Abstract

The application discloses a construction method of modularized pipe bundle components of an air cooling island, and comprises the following steps: step 1, installing a partition wall A-shaped frame; step 2, using a supporting frame tool to assemble small pipe bundle components into inter-bay pipe bundle integral components on the ground; step 3, using a hoisting tool to hoist the inter-bay pipe bundle integral components assembled in step 2 onto the A-shaped frame body, and uniformly performing full welding on each inter-bay pipe bundle to connect the inter-bay pipe bundles into an integral whole, namely, completing the installation of the modularized pipe bundle. The construction method has few intermediate processes and uses few devices, effectively saves the construction period, reduces the construction cost, greatly improves the working efficiency of personnel in the construction process and the safety in the installation process, has obvious economic benefits and safety benefits, and is convenient to popularize.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air cooling island construction methods in the photothermal power generation engineering, and relates to an air cooling island modularized pipe bundle component overall assembly and hoisting construction method. BACKGROUND

[0002] The pipe bundle installation method on the existing air cooling island A-shaped frame is as follows: firstly, the pipe bundle lower header is installed at the bottom of the A-shaped frame, then two cranes are used to hoist the pipe bundle to the upper part of the air cooling island A-shaped frame to perform top butt welding, and the bottom is welded with the pipe bundle lower header to form an integral whole. The existing conventional construction method has frequent hoisting times, the construction workers need to be in the super high air all the time to perform assembly welding operation, the construction difficulty is high, the construction process is more, the construction machinery is more, the construction cost is high, the personal safety factors are more, the safety coefficient is low, the construction efficiency of the high-altitude workers is low, and the assembly welding speed is slow. SUMMARY

[0003] The application aims to provide an air cooling island modularized pipe bundle component overall assembly and hoisting construction method, which has the characteristics of less construction process, less equipment, high construction efficiency and high safety coefficient.

[0004] The technical scheme adopted by the application is that the air cooling island modularized pipe bundle component overall assembly and hoisting construction method is implemented according to the following steps.

[0005] Step 1: install the partition wall A-shaped frame.

[0006] Step 2: use the support frame tool to assemble the small pipe bundle components into the inter-bay pipe bundle integral component on the ground.

[0007] Step 3: use the hoisting tool to hoist the inter-bay pipe bundle integral component assembled in step 2 to the A-shaped frame body, uniformly perform full welding on each inter-bay pipe bundle to connect them into an integral whole, that is, the installation of the pipe bundle is completed.

[0008] The application also has the following characteristics.

[0009] Step 1 is specifically as follows.

[0010] The partition wall is combined into an A shape on the ground, the internal horizontal support is installed, and then the single piece is hoisted to the platform one by one for installation; after the A-shaped frame is installed in place, the verticality thereof is measured by using the transit, if it is not vertical, the cable wind rope is adjusted, the cable wind rope is pulled tight to make the A-shaped frame vertical, and then the inverted chain is locked and welded; after each row of A-shaped frames is installed and adjusted, the A-shaped frame connecting beam is installed to connect the partition wall into an integral whole, and the track beam is installed.

[0011] The partition wall of the end of each fan row and the partition area of the forward flow pipe bundle and the backward flow pipe bundle is installed first.

[0012] The support frame tool is a horizontal triangular prism frame structure, which is made of H-shaped steel, two first support rods are arranged on the two rectangular frames of the side surface of the support frame tool, and two second support rods are arranged on the two triangular frames of the side surface of the support frame tool.

[0013] Step 2 is specifically:

[0014] Before being sent to the construction site, the small tube bundle component is welded with the tube bundle lower header to form an integral whole; after being sent to the construction site, the tube bundle support frame tool arranged on the ground is used to assemble the small tube bundle component; the tube bundle is hoisted and placed on the four-edge frame of the side surface of the support frame tool, the support of the exhaust pipe walkway is installed, and then the above steps are repeated to place the tube bundle one by one, the tube bundle components between the sections are assembled by connecting the top of the tube bundle with a V-shaped connecting plate; then, a plurality of U-shaped buckling groove plates are arranged on the inner and outer sides of the section tube bundle components to fix the tube bundle components, finally, two ear plates for hoisting are welded on the edge of the top of each side tube bundle and a hoisting hole is opened, and two ear plates for hoisting are welded on the edge of the bottom of each side tube bundle and a hoisting hole is opened.

[0015] The hoisting tool comprises longitudinal profile steel, four transverse profile steels are vertically arranged on the longitudinal profile steel, two of which are arranged at the two ends of the longitudinal profile steel, and the other two are arranged near the midpoint of the longitudinal profile steel, and the four transverse profile steels are symmetrically arranged with the radial center line of the longitudinal profile steel as the axis of symmetry; two hoisting holes are arranged on the two end faces of the transverse profile steel, and the two hoisting holes are arranged in a vertical manner.

[0016] The length of the longitudinal profile steel is consistent with the horizontal length of the assembled section tube bundle integral component, and the length of the transverse profile steel is consistent with the width of the section tube bundle integral component.

[0017] The positions of the eight end points of the four transverse profile steels correspond to the positions of the eight ear plates of the section tube bundle integral component in a one-to-one manner.

[0018] Step 3 is specifically:

[0019] After the section tube bundle integral component is assembled, the hoisting tool is used to hoist the section tube bundle integral component to the A-shaped frame body for installation; during hoisting, the eight hoisting holes below the four transverse profile steels of the hoisting tool are connected with the eight ear plates of the section tube bundle integral component by using a steel wire rope, and the eight hoisting holes above the four transverse profile steels of the hoisting tool are connected with the hooks of the crane by using a steel wire rope; all the section tube bundles are hoisted and installed in sequence, and then the section tube bundles are uniformly fully welded to connect the section tube bundles into an integral whole, thereby completing the installation of the tube bundle.

[0020] The beneficial effects of the present application are:

[0021] (1) the construction method of the present application adopts the idea of turning parts into a whole and integration module, a large number of assembling, butt joint and welding work of the tube bundle are transferred from 30m high altitude to the ground, then the assembled tube bundle is hoisted to the A-shaped frame body, the construction efficiency of the operating personnel is improved significantly, the personal safety is effectively guaranteed, the number of butt joint and welding of a large number of tube bundle components in the high altitude is reduced (the number of butt joint and welding of the tube bundle in the high altitude can be reduced to 2%-3% of the original work load), the process of butt joint and welding by two cranes in the high altitude is reduced, the high altitude operation time is greatly reduced, the operation safety factor is improved, only one crane is needed during construction to complete the hoisting operation, the construction period, the total investment of mechanical equipment and human resources are saved, and the cost is reduced and the efficiency is improved;

[0022] (2) by using the construction method of the present application, the tube bundle and the lower header of the tube bundle can be welded into a whole in the factory and sent to the site, the process of butt joint and welding of the lower header of the tube bundle and the tube bundle in the high altitude is reduced, and the construction period is shortened;

[0023] (3) the tube bundle support frame tool and the hoisting tool used in the construction method of the present application are simple in structure and reasonable in design, the bearing capacity and deformation of the two tool structures are theoretically calculated and verified by field construction, the overall stability of the tool structure is good during use, the tool structure has no deformation, and the field construction requirements can be met;

[0024] (4) the construction method of the present application has few intermediate processes and uses few devices, which effectively saves the construction period, reduces the construction cost, greatly improves the working efficiency of the personnel in the construction process and the safety in the installation process, has obvious economic benefit and safety benefit, and is convenient for popularization;

[0025] (5) the idea of the construction method of the present application is also applicable to the construction of various modular steel structures and components which can be hoisted to the high altitude by the crane, and the construction can be realized by reasonably designing and manufacturing various tools on site. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a flow chart of the method of the present application;

[0027] Figure 2 is a structural schematic view of the support frame tool in the method of the present application;

[0028] Figure 3 is a structural schematic view of the hoisting tool in the method of the present application;

[0029] Figure 4 is a side view of the hoisting tool in the method of the present application;

[0030] Figure 5 is a structural schematic view of the A-shaped frame after installation in the method of the present application;

[0031] Figure 6 is the structure schematic diagram of the pipe bundle after the assembly on the support frame tool in the method of the application;

[0032] Figure 7 is the hoisting way schematic diagram of the inter-node pipe bundle integral component;

[0033] Figure 8 is the hoisting way front view of the inter-node pipe bundle integral component;

[0034] Figure 9 is the structure schematic diagram of the pipe bundle hoisted and positioned on the A-shaped frame in the method of the application.

[0035] In the figure, 1. first support rod, 2. transverse section steel, 3. longitudinal section steel, 4. hoisting hole, 5. pipe bundle, 6. U-shaped buckling groove plate, 7. ear plate, 8. lower header, 9. support frame tool, 10. second support rod. DETAILED DESCRIPTION

[0036] The application will be described in detail below in combination with the drawings and specific embodiments.

[0037] Example 1:

[0038] The air cooling island modular pipe bundle component integral assembly and hoisting construction method of the application, the flow is as shown in Figure 1 The pipe bundle small components are first assembled and welded on the ground to form the inter-node pipe bundle integral component using the support frame tool, so that a large amount of assembly and welding work is carried out on the ground, the integral pipe bundle component of each inter-node is assembled, then the integral pipe bundle component is hoisted to the upper A-shaped frame of the air cooling island using the hoisting tool and is welded and fixed, and then the operation is repeated until the pipe bundle on all A-shaped frames is installed.

[0039] Example 2:

[0040] On the basis of example 1, through the optimized construction method, the pipe bundle and the lower header are welded into an integral component and sent to the site before the pipe bundle and the lower header enter the site, so that the welding process of the pipe bundle and the lower header on the site and the process of welding the lower header to the bottom of the A-shaped frame can be reduced.

[0041] Example 3:

[0042] On the basis of example 2, the structure of the support frame tool is as shown in Figure 2As shown, it is a transverse triangular prism frame structure, which is made of H-shaped steel, two first support rods 1 are installed on the two rectangular frames of its side, and two second support rods 10 are installed on the two triangular frames of its side.

[0043] Embodiment 4:

[0044] On the basis of embodiment 3, the structure of the hoisting tool is as shown in Figure 3 and Figure 4 , which comprises one longitudinal profile steel 3 and four transverse profile steels 2, the four transverse profile steels 2 are fixed vertically on the longitudinal profile steel 3, two of which are arranged at the two ends of the longitudinal profile steel 3, and the other two are arranged near the midpoint of the longitudinal profile steel 3, and the four transverse profile steels 2 are symmetrically arranged with the radial center line of the longitudinal profile steel 3 as the axis of symmetry. Two end faces of the transverse profile steel 2 are provided with two lifting holes 4, which are distributed vertically and used for hanging steel wire ropes, the upper lifting hole 4 is used for hanging on the hook of the crane by penetrating the steel wire rope, and the lower lifting hole 4 is used for hanging on the assembled pipe bundle integral component by penetrating the steel wire rope. Eight ear plates for hoisting are arranged on the ground assembled pipe bundle integral component, and the positions of the eight ear plates correspond to the positions of the eight end points of the four transverse profile steels 2 on the hoisting tool. The length of the longitudinal profile steel 3 is consistent with the horizontal length of the assembled inter-tube bundle integral component, and the width of the transverse profile steel 2 is consistent with the width of the inter-tube bundle integral component.

[0045] Embodiment 5:

[0046] On the basis of embodiment 4, the air cooling island modular pipe bundle integral component assembly and hoisting construction method is as shown in Figure 1 , which is implemented according to the following steps:

[0047] Step 1, install the A-shaped frame of the partition wall

[0048] The partition wall is combined into an A shape on the ground, and the internal horizontal support is installed, and then the single piece is hoisted to the platform for installation. After the A-shaped frame is installed in place, the verticality is measured by the theodolite, if it is not vertical, the cable wind rope is adjusted, the cable wind rope is tightened to make the A-shaped frame vertical, and then it is welded after the cable is locked. After each row of A-shaped frames is installed and adjusted, the A-shaped frame connecting beam is installed to make the partition wall connected into a whole, and the track beam is installed. The partition wall at the end of each fan row and the partition area of the parallel flow pipe bundle and the counter flow pipe bundle should be installed first. The installation of the partition wall is carried out with the installation of each group of radiators. The structure of the installed A-shaped frame body is as shown in Figure 5 .

[0049] Step 2, assemble the small pipe bundle integral component into an inter-tube bundle integral component

[0050] The tube bundle is placed in a horizontal state when delivered, and is equipped with lifting lugs at both ends, and is welded to the lower header of the tube bundle as a whole according to the requirements of the site.

[0051] As shown in Figure 6 , the small tube bundle components are spliced into the inter-bay tube bundle whole component by the tube bundle support frame tool 9 arranged on the ground. The tube bundle 5 is lifted and placed on the quadrilateral frame on the side of the support frame tool 9, the support of the exhaust pipe walkway is installed, and the above steps are repeated to place the tube bundle 5 one by one, and the top of the tube bundle is connected by a V-shaped connecting plate. After splicing the tube bundle components of each inter-bay, the U-shaped butt joint groove plate 6 is used to fix the tube bundle inside and outside, and several rows of U-shaped butt joint groove plates 6 are arranged on each side. The U-shaped butt joint groove plates 6 on the inside and outside of each side of the tube bundle are fixed by bolts. In addition, two ear plates 7 for lifting are welded near the edge of the top of each side of the tube bundle and a lifting hole is opened, and two ear plates 7 for lifting are welded near the edge of the lower header 8 of each side of the tube bundle at the bottom and a lifting hole is opened. The positions of the eight ear plates correspond one by one to the positions of the eight end points of the four horizontal steel bars 2 on the lifting tool.

[0052] Step 3, install the tube bundle

[0053] After the inter-bay tube bundle whole component is assembled, it is lifted by a crane through the lifting tool and installed in place on the A-shaped frame body. As shown in Figure 7 and Figure 8 , when lifting, the eight lifting holes 4 below the four horizontal steel bars 2 on the lifting tool are connected one by one with the eight ear plates 7 on the inter-bay tube bundle whole component by a steel wire rope, and the eight lifting holes 4 above the four horizontal steel bars 2 on the lifting tool are connected with the hooks of the crane by a steel wire rope. All inter-bay tube bundles are lifted and installed in turn, and then full welding is performed on each inter-bay tube bundle to connect them into a whole, that is, the installation of the tube bundle is completed. The state of the tube bundle and the A-shaped frame after installation is shown in Figure 9 .

[0054] Example 6

[0055] This example takes the installation of a 100,000-kilowatt light and heat engineering air cooling island as an example. The steel structure platform is 47.58 meters long and 37.81 meters wide, divided into 7 axes and 6 rows, with 12 fans, and one side of the platform is cantilevered. The platform is cantilevered around the walkway, which is 1.45-2m wide, and the walkway is surrounded by a wind barrier wall, which is about 11 meters high.

[0056] The A-type frame is arranged in the east-west direction in the project, and there are 4 columns, in which 1170 tube bundles are installed on each column of A-type frame, each column of A-type frame is 33.96m long, and 4680 tube bundles are installed on the 4 columns of A-type frame, the tube bundles and the lower header are 10.15m long, each tube bundle is 20cm wide and 6cm high. The hoisting and installation height of the tube bundle is 18m-30m. The A-type frame is installed before the installation of the tube bundle, and the angle steel and profile steel are welded on site.

[0057] The structure of the support frame tool used in the project is that the tool material is H-shaped steel 20x20x1.2cm, the bottom quadrilateral of the three-prism frame is 10.6m long and 2.2m wide; the other two sides of the side triangle are 10.14m long, and the two middle horizontal support rods in the triangle are 5.3m long, and the overall height of the tool is 50cm. The support frame tool is designed for 2.2m interval tube bundle integral components, including but not limited to this specification, which can be flexibly assembled according to the actual situation on site. According to the crane model on site and the 30m hoisting height combined with the previous construction experience, the 2.2m integrated tube bundle specification construction is the most convenient.

[0058] The hoisting tool is composed of 4 horizontal steel bars 2.2m long and 1 vertical steel bar 10.6m long, one at each end, one 5.1m away from the end, and the steel components of the overall component are fully welded. The hoisting tool is designed for 2.2m interval tube bundle integral components, including but not limited to the structure size, and the hoisting tool is customized to fit the assembled tube bundle components.

[0059] The tube bundle is assembled on the ground by the support frame tool to form a 2.2m wide interval integral component, and after assembling the tube bundle component of each interval, the U-shaped butt joint groove plate (wing plate and width are both 2cm) is used to fix the tube bundle every 2.5m on the inside and outside of the tube bundle, and 3 U-shaped butt joint groove plates are arranged on each side for fixation, and the U-shaped butt joint groove plates on the inside and outside of the tube bundle are fixed by bolts with an interval of 24cm. In addition, 2 ear plates for hoisting are welded on the top of each side of the tube bundle 15cm away from the edge and the lifting hole is opened, and 2 ear plates for hoisting are welded on the lower header of each side of the tube bundle 15cm away from the edge and the lifting hole is opened. The positions of the eight ear plates correspond to the positions of the eight end points of the four horizontal steel bars on the hoisting tool.

[0060] The whole pipe bundle is hoisted to the A-shaped frame of the air cooling island by a crane using a hoisting tool, then the pipe bundle assembled and welded in each column of A-shaped frame is divided into 15 sections for hoisting construction, 4 columns are hoisted in 60 sections, the original 2340 times of butt welding work in the air is reduced to 56 times. Through the improvement and innovation of the construction method, the construction task of 9 section assembly hoisting can be completed every day, and the pipe bundle installation work of 4 columns of A-shaped frame, a total of 60 sections, can be completed in 7 days. The conventional construction method needs at least 15 days of construction period for the high-altitude butt welding of the pipe bundle by using two cranes, and the construction period can be saved by about 54% by using the construction method, and only one crane is needed to complete the pipe bundle installation work, and the total human resource investment is also saved by about 54%. In addition, the construction method saves at least 23 days of crane rental fee (compared with two cranes), and at least 8 days of human resource investment of a team (each team is equipped with 11 people), the innovative idea of the construction method is also applicable to the construction of various components of the module hoisted by the crane, and the application range of the innovative application method is wide, which can solve many such large-scale modular structures, components and steel structures, and achieve the purpose of cost reduction and efficiency improvement while improving the safety benefit of personnel construction.

Claims

1. A method for assembling and hoisting a modular tube bundle component of an air cooling island as a whole, characterized in that, Specifically, the following steps are implemented: Step 1, install the partition wall A-shaped frame; Step 2, use the support frame tool to assemble the small tube bundle components into an inter-tube bundle overall component with a length of 2.2m on the ground; Step 3, use the lifting tool to lift the inter-tube bundle overall component assembled in step 2 to the A-shaped frame body, and uniformly full weld each inter-tube bundle to connect them into a whole, that is, complete the installation of the tube bundle; Step 1 is specifically: The partition wall is combined into an A shape on the ground, and the internal horizontal support is installed, and then each single piece is lifted to the platform for installation; After the A-shaped frame is installed in place, the verticality is measured with a theodolite, and if it is not vertical, the cable wind rope is adjusted to make the A-shaped frame vertical, and then welded after locking the chain; After each row of A-shaped frames are installed and adjusted, the A-shaped frame connecting beam is installed to connect the partition wall into a whole, and the track beam is installed; The support frame tool is a horizontally arranged three-prism frame structure, which is made of H-shaped steel, two first support rods (1) are arranged on the two rectangular frames on the side of the three-prism frame, and a second support rod (10) is arranged horizontally on the two triangular frames on the side of the three-prism frame, and the second support rod (10) is arranged at the middle position of the triangular frame; Step 2 is specifically: Before the small tube bundle components are sent to the construction site, the tube bundle (5) and the tube bundle lower header (8) are welded into a whole; After being sent to the construction site, the small tube bundle components are assembled by using the tube bundle support frame tool arranged on the ground: the tube bundle (5) is lifted and placed on the four-sided frame on the side of the support frame tool, the support of the exhaust pipe walkway is installed, and then the above steps are repeated to place the tube bundle (5) one by one, and then the tube bundle (5) is connected by a V-shaped connecting plate at the top, that is, the tube bundle components of each inter-tube bundle are assembled; Then, a plurality of U-shaped counter-buckle groove plates (6) are installed on the inner and outer sides of the inter-tube bundle components to fix them, and finally, two ear plates (7) for lifting are welded on the edge of the top of each side tube bundle and the lifting hole is opened, and two ear plates (7) for lifting are welded on the edge of the tube bundle lower header (8) at the bottom of each side tube bundle and the lifting hole is opened; The lifting tool includes a longitudinal profile steel (3), four transverse profile steels (2) are vertically arranged on the longitudinal profile steel (3), two of which are arranged at the two ends of the longitudinal profile steel (3), and the other two are arranged near the midpoint of the longitudinal profile steel (3), and the four transverse profile steels (2) are symmetrically arranged with the radial center line of the longitudinal profile steel (3) as the axis of symmetry; Two lifting holes (4) are formed on the two end faces of the transverse profile steel (2), and the two lifting holes (4) are distributed vertically; Step 3 is specifically: After the assembly of the inter-nodal tube bundle integral component is completed, it is hoisted to the A-shaped frame body by a crane through a hoisting tool; during hoisting, eight lifting holes (4) below four horizontal section steels (2) on the hoisting tool are connected with eight ear plates (7) on the inter-nodal tube bundle integral component one by one through a steel wire rope, and eight lifting holes (4) above the four horizontal section steels (2) on the hoisting tool are connected with hooks of the crane through a steel wire rope; all the inter-nodal tube bundles are hoisted and installed in sequence, and then full welding is performed on the inter-nodal tube bundles to connect them into an integral whole, that is, the installation of the tube bundle is completed.

2. The air-cooled island modular tube bundle component integrated assembly and hoisting construction method according to claim 1, characterized in that, In step 1, the end of each fan row and the partition wall of the separation area of the parallel flow tube bundle and the counter flow tube bundle are installed.

3. The air cooling island modular tube bundle component integrated assembly and hoisting construction method according to claim 1, characterized in that, The length of the longitudinal section steel (3) is consistent with the horizontal length of the assembled inter-nodal tube bundle integral component, and the length of the horizontal section steel (2) is consistent with the width of the inter-nodal tube bundle integral component.

4. The air cooling island modular tube bundle component integrated assembly and hoisting construction method according to claim 1, characterized in that, The positions of eight end points of the four horizontal section steels (2) correspond to the positions of the eight ear plates (7) of the inter-nodal tube bundle integral component one by one.

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