A transport tool and method for a conical roof steel structure of a nuclear power plant

Abstract

The present invention discloses a transport tooling for a conical roof steel structure of a nuclear power plant, including a main support truss and a connecting truss; the main support truss includes a support truss, a support truss connecting beam, an end baffle, a side baffle and a fixing frame, two fixing frames are symmetrically fixedly connected through the support truss connecting beam, the lower end of the support truss is fixed with an end baffle for lifting and fixing the end face of the radial beam, and the support truss is installed with side baffles for limiting and fixing both sides of the radial beam; the connecting truss is used to symmetrically connect the main support truss, and the main support truss is used to support the radial beams at the four ends of the conical roof steel structure respectively. The present invention limits and fixes the radial beams by the main support truss, the end baffle and the side baffle, so as to avoid deformation and damage of the conical roof steel structure caused by sliding collision during transportation; the transport tooling, the transport vehicle and the conical roof steel structure are analyzed by the limited element software, so as to ensure the convenience and stability of the installation of the transport tooling, and ensure the stability of transportation after installation.

Description

Technical Field

[0001] The invention relates to a transport tool, in particular to a transport tool for a conical roof steel structure of a nuclear power plant and a transport method. Background Art

[0002] The CAP1400 nuclear power plant is a large-scale advanced pressurized water reactor nuclear power plant with independent intellectual property rights developed on the basis of digesting and absorbing the imported AP1000 third-generation technology. It is the first of its kind in the world.

[0003] The conical roof steel structure of the CAP1400 nuclear power plant is the capping structure of the nuclear island. It has a conical overall shape and is one of the most important structures for a nuclear power plant to resist internal and external accidents. It has main functions such as radiation shielding, missile protection, passive cooling, and resistance to tornadoes and earthquakes.

[0004] The outer radius of the bottom of the conical roof steel structure is 22.41m, the top radius is 5.18m, and the height is 12.386m. The main frame is composed of H-shaped steel and steel panels. The middle position is a compression ring beam. 32 H-shaped steels are evenly arranged around the compression ring beam. The total weight is 1034t. The conical roof steel structure assembly site is about 800m away from the hoisting site, requiring long-distance transportation.

[0005] Conical roof steel structure transportation has the following characteristics:

[0006] The transportation risk of conical roof steel structure is high: the transportation weight of conical roof steel structure is 1034t, and the diameter is 44.8m. It has the characteristics of large weight, large size and relatively small overall structural stiffness. If the conical roof steel structure is deformed during transportation, it cannot be corrected in subsequent construction. It is difficult to control the deformation of conical roof steel structure during transportation, and the transportation quality and safety risk is high.

[0007] The design of transport tooling for conical roof steel structure is difficult: the conical roof steel structure is a conical structure as a whole, and the structure is composed of 32 steel beams as a frame. The transport tooling needs to comprehensively consider the anti-deformation problem of the conical roof steel structure during transportation, the installation problem of the transport tooling in a closed environment, the connection form between the transport tooling and the conical roof steel structure, and the connection form between the transport tooling and the transport vehicle.

[0008] Therefore, there is an urgent need for a nuclear power plant conical roof steel structure transportation tooling and transportation method to solve the tooling fixation and assembly transportation problems of the nuclear power plant conical roof steel structure. Summary of the invention

[0009] Aiming at the deficiencies in the prior art, the present invention provides a transport tool and a transport method for a conical roof steel structure of a nuclear power plant, so as to solve the problems of tool fixing and assembly transportation of the conical roof steel structure of the nuclear power plant.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] A transport tool for a conical roof steel structure of a nuclear power plant, characterized in that it includes a main support truss and a connecting truss; the main support truss includes a support truss, a support truss connecting beam, an end baffle, a side baffle and a fixing frame, two of the fixing frames are symmetrically fixedly connected by the support truss connecting beam, a support truss for supporting the lower end surface of the radial beam of the conical roof steel structure is fixed on the fixing frame, an end baffle for lifting and fixing the end surface of the radial beam is fixed on the lower end of the support truss, and side baffles for limiting and fixing the two sides of the radial beam are installed on the support truss; the connecting truss is used to symmetrically connect four main support trusses into a rectangular structure, and the four main support trusses are respectively used to support the radial beams of the conical roof steel structure.

[0012] To optimize the above technical solutions, the specific measures taken also include:

[0013] Furthermore, the connecting truss includes two truss beams, a connecting angle steel and a first connecting plate. Two adjacent main support trusses are connected and fixed by the two truss beams, and the two truss beams are connected and reinforced by the connecting angle steel. The truss beam includes several trusses, and the trusses are connected and fixed by the first connecting plate.

[0014] Furthermore, it also includes a side support truss, which is fixed on the connecting truss; the side support truss includes a support frame, a top plate and an end side baffle plate, one end of the support frame is fixedly connected to the top plate, and the other end is fixedly connected to the two end side baffle plates; a support surface for lifting and supporting the lower end surface of the radial beam is provided between the two end side baffle plates, and the end side baffle plates are used to limit and fix the two sides of the radial beam, and the upper end surface of the top plate and the support surface form a support plane for lifting and supporting the lower end surface of the radial beam.

[0015] Furthermore, the upper end surface of the supporting truss and the upper end surface of the top plate are both provided with limiting blocks for limiting and fixing both sides of the radial beam.

[0016] Furthermore, it also includes a support rod, which includes a supporting steel pipe and a second connecting plate. The supporting steel pipe includes several round steel pipes, and the round steel pipes are fixedly connected by the second connecting plate. The supporting steel pipe is used to fix two adjacent connecting trusses.

[0017] Furthermore, the bottom end of the fixing frame is a plane, the side section of the end baffle is L-shaped, and the side section of the side baffle is triangular.

[0018] Furthermore, a method for transporting the conical roof steel structure transport tooling of a nuclear power plant using the above-mentioned method is characterized by comprising the following steps:

[0019] Step 1: Preset the concrete piers for assembly corresponding to the 32 radial beams of the conical roof steel structure;

[0020] Step 2: fixing and installing end baffles corresponding to the upper end surface of each concrete pier for assembly;

[0021] Step 3: Positioning by end baffles, the end faces of the 32 radial beams of the conical roof steel structure are respectively connected to the upper end faces of the end baffles;

[0022] Step 4: Calculate and analyze the distribution positions of the four transport vehicles using finite element software;

[0023] Step 5: According to the analysis results, the assembled support trusses, support truss connecting beams, side baffles, fixing frames and limit blocks are fixedly connected to the end baffles through the lower ends of the support trusses, and the lower end faces of the radial beams are arranged to fit the upper end faces of the support trusses; at the same time, the side support trusses, connecting trusses and braces are installed accordingly;

[0024] Step 6: According to the analysis results, a jack is installed at the lower end of the radial beam corresponding to the assembly concrete pier that affects the travel of the transport vehicle;

[0025] Step 7: Remove the concrete piers for assembly with jacks and use jacks for temporary support;

[0026] Step 8: The transport vehicle lowers its height and moves to the bottom of the corresponding radial beam;

[0027] Step nine, raising the height of the transport vehicle so that it fits with the fixing frame of the transport tooling, and reinforcingly connecting the transport tooling with the transport vehicle through the fixing frame;

[0028] Step 10: Four transport vehicles operate synchronously for transportation. The wind speed during transportation is not greater than 10.8m / s, the road slope is not greater than 3%, and the vehicle running acceleration is not greater than a=0.02g.

[0029] Furthermore, the finite element software adopts SAP2000.

[0030] Furthermore, the step four includes: performing an overall structural analysis of the conical roof steel structure, transport tooling and transport vehicles through SAP2000 to confirm the distribution positions of the four transport vehicles.

[0031] The beneficial effects of the present invention are:

[0032] The present invention forms a stable rectangular support frame by connecting the main support truss with the connecting truss; then the radial beam is supported by the support truss of the main support truss fitting the lower end face of the radial beam, and the radial beam is supported by the end baffle fitting the terminal end face of the radial beam; the radial beam is limited and fixed by the side baffle fitting on both sides of the radial beam, so as to avoid deformation and damage of the conical roof steel structure due to sliding and collision during transportation; by using limited element software and combining the transportation tooling, transportation vehicle and the conical roof steel structure for overall analysis, it is ensured that the installation of the transportation tooling is convenient and stable, and the stability during transportation after installation is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0034] Figure 2 This is a structural schematic diagram of a main support truss of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0035] Figure 3 This is a schematic structural diagram of a side support truss of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0036] Figure 4 This is a schematic structural diagram of a connecting truss of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0037] Figure 5 This is a schematic structural diagram of a support rod of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0038] Figure 6 This is a schematic diagram of the connection structure of the main support truss, the transport vehicle and the radial beam of a nuclear power plant conical roof steel structure transport tooling proposed by the present invention;

[0039] Figure 7 This is a schematic diagram of the actual installation structure of a nuclear power plant conical roof steel structure transportation tooling proposed by the present invention.

[0040] Figure numerals: 1. transport tooling, 11. main support truss, 111. support truss, 112. support truss connecting beam, 113. end baffle, 114. side baffle, 115. fixed frame, 12. side support truss, 121. support frame, 122. top plate, 123. end side baffle, 13. connecting truss, 131. truss beam, 132. connecting angle steel, 133. first connecting plate, 14. strut, 141. support steel pipe, 142. second connecting plate, 2. conical roof steel structure, 21. radial beam, 22. lower end face, 23. terminal end face, 3. concrete pier for assembly, 4. transport vehicle, 5. limit block. Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings.

[0042] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0043] As attached Figure 1 and attached Figure 2 As shown, a transport tooling for a conical roof steel structure of a nuclear power plant according to an embodiment of the present invention is characterized in that: it includes a main support truss 11 and a connecting truss 13; the main support truss 11 includes a support truss 111, a support truss connecting beam 112, an end baffle 113, a side baffle 114 and a fixing frame 115, and the two fixing frames 115 are symmetrically fixedly connected by the support truss connecting beam 112, and the fixing frame 115 is fixed with a support truss 111 for supporting the lower end surface 22 of the radial beam 21 that fits the conical roof steel structure 2, and the lower end of the support truss 111 is fixed with an end baffle 113 for lifting and fixing the end end surface 23 of the radial beam 21, and the support truss 111 is installed with side baffles 114 for limiting and fixing both sides of the radial beam 21; the connecting truss 13 is used to symmetrically and fixedly connect the four main support trusses 11 into a rectangular structure, and the four main support trusses 11 are respectively used to support the radial beams 21 at the four ends of the conical roof steel structure 2.

[0044] In this way, a stable rectangular support frame is formed by connecting the main support truss 11 and the connecting truss 13; the radial beam 21 is supported by the supporting truss 111 of the main support truss 11 being fitted to the lower end face 22 of the radial beam 21, and the radial beam 21 is supported by the end baffle 113 being fitted to the end end face 23 of the radial beam 21, and the radial beam 21 is limited and fixed by the side baffles 114 being fitted on both sides of the radial beam 21, so as to avoid deformation and damage of the conical roof steel structure 2 due to sliding collision during transportation. In this embodiment, welding or high-strength bolts can be used for connection where connection and fixation are required.

[0045] As attached Figure 4 As shown, in this embodiment, the connecting truss 13 includes two truss beams 131, a connecting angle steel 132 and a first connecting plate 133, and each adjacent two main supporting trusses 11 are connected and fixed by the two truss beams 131, and the two truss beams 131 are connected and reinforced by the connecting angle steel 132; the truss beam 131 includes a plurality of trusses, and the trusses are connected and fixed by the first connecting plate 133; in this way, the length of the truss beam 131 can be set as needed through the first connecting plate 133, and the connection stability between the four main supporting trusses 11 is ensured by the setting of the two truss beams 131 and the connecting angle steel 132.

[0046] As attached Figure 3 As shown, in this embodiment, it also includes a side support truss 12, and the side support truss 12 is fixed on the connecting truss 13; the side support truss 12 includes a support frame 121, a top plate 122 and an end side baffle 123, one end of the support frame 121 is fixedly connected to the top plate 122, and the other end is fixedly connected to the two end side baffles 123; a support surface for lifting and supporting the lower end surface 22 of the radial beam 21 is provided between the two end side baffles 123, and the end side baffles 123 are used to limit and fix the two sides of the radial beam 21, and the upper end surface of the top plate 122 and the support surface form a support plane for fitting the lower end surface 22 of the radial beam 21 for lifting and supporting; in this way, through the setting of the side support truss 12, auxiliary support means are added to the radial beam 21 of the conical roof steel structure 2, thereby increasing the stability of the transport tooling 1 structure; in this embodiment, the side cross-section of the end side baffle 123 is set in a triangular shape.

[0047] Among them, the upper end surface of the supporting truss 111 and the upper end surface of the top plate 122 are both provided with limit blocks 5 for limiting and fixing both sides of the radial beam 21; thereby, the reinforcement means on both sides of the radial beam 21 are increased, the stability of the structure of the transport tooling 1 is increased, and it is convenient to confirm the installation path of the radial beam 21 on the transport tooling 1.

[0048] As attached Figure 5 As shown, in this embodiment, it also includes a support rod 14, and the support rod 14 includes a supporting steel pipe 141 and a second connecting plate 142. The supporting steel pipe 141 includes several round steel pipes, and the round steel pipes are fixedly connected by the second connecting plate 142. The supporting steel pipe 141 is used to fix two adjacent connecting trusses 13. In this way, through the setting of the support rod 14, the connection reinforcement means between the connecting trusses 13 is increased, thereby increasing the stability of the transport tooling 1 structure.

[0049] In this embodiment, the bottom end of the fixing frame 115 is a plane, so that it is easy to be placed flat on the transport vehicle 4, which increases stability and is easy to be fixedly connected to the transport vehicle 4; the side section of the end baffle 113 is L-shaped, so that the end surface 23 of the radial beam 21 is reinforced through the L-shaped groove; the side section of the side baffle 114 is triangular, so that the stability of the support structure is ensured and it is easy to manufacture and use. In this embodiment, the fixing frame 115, the end baffle 113 and the side baffle 114 can all be made of steel plates, and the steel plates are 30 mm thick.

[0050] In this embodiment, a method for transporting a nuclear power plant conical roof steel structure transport tooling according to any one of the above claims is characterized by comprising the following steps:

[0051] Step 1: Preset the assembling concrete piers 3 corresponding to the 32 radial beams 21 of the conical roof steel structure 2;

[0052] Step 2: fix and install the end baffle 113 corresponding to the upper end surface of each assembling concrete pier 3;

[0053] Step 3: Positioning is performed through the end baffle 113, and the end end faces 23 of the 32 radial beams 21 of the conical roof steel structure 2 are respectively fitted and connected to the upper end faces of the end baffle 113;

[0054] Step 4, calculating and analyzing the distribution positions of the four transport vehicles 4 by finite element software;

[0055] Step 5, according to the analysis results, the assembled support truss 111, support truss connecting beam 112, side baffle 114, fixing frame 115 and limiting block 5 are fixedly connected to the end baffle 113 through the lower end of the support truss 111, and the lower end surface 22 of the radial beam 21 is arranged to fit the upper end surface of the support truss 111; at this time, the lower end surface 22 of the radial beam 21 fits the upper end surface of the support truss 111, and the upper end surface of the radial beam 21 fits the end baffle 113, and both sides of the radial beam 21 are clamped and fixed by the side baffle 114 and the limiting block 5; at the same time, the side support truss 12, connecting truss 13 and strut 14 are installed accordingly;

[0056] Step 6: According to the analysis results, a jack is installed at the lower end of the radial beam 21 corresponding to the assembly concrete pier 3 that affects the travel of the transport vehicle 4; in actual operation, the installation of the jack needs to avoid the travel path of the transport vehicle 4;

[0057] Step 7, dismantle the concrete pier 3 for assembly provided with a jack, and provide temporary support by the jack;

[0058] Step 8: The transport vehicle 4 lowers its height and moves to the bottom of the corresponding radial beam 21;

[0059] Step nine, raising the height of the transport vehicle 4 so that it fits with the fixing frame 115 of the transport tooling 1, and reinforcingly connecting the transport tooling 1 and the transport vehicle 4 through the fixing frame 115;

[0060] Step 10: Four transport vehicles 4 are operated synchronously for transportation. During transportation, the wind speed is not greater than 10.8 m / s, the road slope is not greater than 3%, and the vehicle running acceleration is not greater than a=0.02g.

[0061] The finite element software is SAP2000. Step 4 includes: performing an overall structural analysis of the conical roof steel structure 2, the transport tooling 1 and the transport vehicle 4 through SAP2000 to confirm the distribution positions of the four transport vehicles 4 and the installation positions of the remaining transport tooling 1; in this embodiment, the weight of the conical roof steel structure 2 is about 1034t and the diameter is 44.82m. During transportation, the maximum vertical displacement of the conical roof steel structure 2 is 26.48mm, and its strength and stiffness meet the relevant provisions of the relevant design specifications.

[0062] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A nuclear power plant conical roof steel structure transport tooling, characterized by: The invention comprises a main support truss (11) and a connecting truss (13); the main support truss (11) comprises a support truss (111), a support truss connecting beam (112), an end baffle (113), a side baffle (114) and a fixing frame (115); the two fixing frames (115) are symmetrically fixedly connected via the support truss connecting beam (112); a support for supporting the lower end surface (22) of a radial beam (21) that fits the conical roof steel structure (2) is fixed on the fixing frame (115); A truss (111), wherein an end baffle (113) for supporting and fixing the end end surface (23) of the radial beam (21) is fixed at the lower end of the support truss (111), and side baffles (114) for limiting and fixing the two sides of the radial beam (21) are installed on the support truss (111); the connecting truss (13) is used to symmetrically connect the four main support trusses (11) into a rectangular structure, and the four main support trusses (11) are respectively used to support the radial beams (21) of the conical roof steel structure (2); The connecting truss (13) comprises two truss beams (131), a connecting angle steel (132) and a first connecting plate (133); two adjacent main support trusses (11) are connected and fixed via the two truss beams (131); the two truss beams (131) are connected and reinforced via the connecting angle steel (132); the truss beam (131) comprises a plurality of trusses, and the trusses are connected and fixed via the first connecting plate (133).

2. A nuclear power plant conical roof steel structure transport tooling according to claim 1, characterized in that: It also includes a side support truss (12), wherein the side support truss (12) is fixed on the connecting truss (13); the side support truss (12) includes a support frame (121), a top plate (122) and an end side baffle (123); one end of the support frame (121) is fixedly connected to the top plate (122), and the other end is fixedly connected to two end side baffles (123); a support surface for lifting and supporting the lower end surface (22) of the radial beam (21) is provided between the two end side baffles (123); the end side baffles (123) are used to limit and fix the two sides of the radial beam (21); the upper end surface of the top plate (122) and the support surface form a support plane for fitting the lower end surface (22) of the radial beam (21) for lifting and supporting.

3. A nuclear power plant conical roof steel structure transport tooling according to claim 2, characterized in that: The upper end surface of the support truss (111) and the upper end surface of the top plate (122) are both provided with limit blocks (5) for limiting and fixing the two sides of the radial beam (21).

4. A nuclear power plant conical roof steel structure transport tooling according to claim 3, characterized in that: It also comprises a support rod (14), the support rod (14) comprising a support steel pipe (141) and a second connection plate (142), the support steel pipe (141) comprising a plurality of round steel pipes, the round steel pipes being fixedly connected via the second connection plate (142), and the support steel pipe (141) being used to fixedly connect two adjacent connection trusses (13).

5. A nuclear power plant conical roof steel structure transport tooling according to claim 4, characterized in that: The bottom end of the fixing frame (115) is a plane, the side cross-section of the end baffle (113) is L-shaped, and the side cross-section of the side baffle (114) is triangular.

6. A method for transporting a nuclear power plant conical roof steel structure transport tooling as claimed in claim 5, characterized in that: The steps include: Step 1: Preset the assembling concrete piers (3) corresponding to the 32 radial beams (21) of the conical roof steel structure (2); Step 2: fixing and installing an end baffle (113) corresponding to the upper end surface of each assembling concrete pier (3); Step 3: Positioning is performed through the end baffle (113), and the end end surfaces (23) of the 32 radial beams (21) of the conical roof steel structure (2) are respectively fitted and connected to the upper end surfaces of the end baffle (113); Step 4, using finite element software to calculate and analyze the distribution positions of the four transport vehicles (4); Step 5, according to the analysis results, the assembled support truss (111), support truss connecting beam (112), side baffle (114), fixing frame (115) and limit block (5) are fixedly connected to the end baffle (113) through the lower end of the support truss (111), and the lower end surface (22) of the radial beam (21) is arranged to fit the upper end surface of the support truss (111); at the same time, the side support truss (12), connecting truss (13) and support rod (14) are installed accordingly; Step six, according to the analysis result, a jack is arranged at the lower end of the radial beam (21) corresponding to the assembly concrete pier (3) that affects the travel of the transport vehicle (4); Step 7, dismantling the concrete pier (3) for assembly provided with a jack, and providing temporary support by means of the jack; Step 8: the transport vehicle (4) lowers its height and moves to the bottom of the corresponding radial beam (21); Step nine, raising the height of the transport vehicle (4) so ​​that it fits with the fixing frame (115) of the transport tooling (1), and reinforcingly connecting the transport tooling (1) and the transport vehicle (4) via the fixing frame (115); Step 10: Four transport vehicles (4) are operated synchronously for transportation. During transportation, the wind speed is not greater than 10.8 m / s, the road slope is not greater than 3%, and the vehicle running acceleration is not greater than a=0.02g.

7. A transportation method according to claim 6, characterized in that: The finite element software used is SAP2000.

8. A transportation method according to claim 7, characterized in that: The step four comprises: using SAP2000 to perform an overall structural analysis of the conical roof steel structure (2), the transport tooling (1) and the transport vehicles (4) to confirm the distribution positions of the four transport vehicles (4).

Images