Mounting method and assistance device for steel containment

Abstract

A mounting method and assistance device for a steel containment. The method comprises: assembling a plurality of in-place section sub-modules (6), and arranging a plurality of first supporting members (3) on the side faces of the in-place section sub-modules; arranging telescopic mechanisms (4) at the tops of the first supporting members; arranging second supporting members (2) on the side faces of hoisting section sub-modules, and using slings (20) to hoist the hoisting section sub-modules (5), so that the second supporting members and the first supporting members are correspondingly arranged, and are fitted to the output ends of the telescopic mechanisms; and adjusting the telescopic mechanisms so as to keep the bottoms of the hoisting section sub-modules horizontal, removing the slings of the hoisting section sub-modules, and assembling and welding. When the steel containment is hoisted and in place, the slings can be removed. The method and the assistance device can reduce the influences of loading of the slings on the on-site construction.

Description

A method and auxiliary device for installing a steel containment shell

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310402889.5, filed on April 14, 2023, entitled “A method and auxiliary device for installing a steel containment shell,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the technical field of steel containment installation of nuclear power plants, in particular to an installation method and auxiliary device for steel containment. Background Art

[0004] The new generation of passive nuclear power plants utilizes a steel containment vessel, a free-standing cylindrical steel vessel with elliptical top and bottom heads. Due to its large size, the steel containment vessel's fabrication and installation differ from those of conventional pressure vessels. The containment vessel is divided into submodules based on on-site hoisting feasibility and capacity. Each submodule is assembled and welded from multiple steel plates. A large crane uses rigging to lift each submodule into place.

[0005] After the steel containment submodules are hoisted into place, the hoisted sections are assembled and welded to the previously positioned sections. The rigging can only be removed after the initial welding is complete, and the rigging must remain loaded for approximately a week. This load significantly impacts the work surface, safe, and civilized construction practices, and can easily lead to safety accidents.

[0006] Summary of the Invention

[0007] In response to the shortcomings of the existing technology, the present invention provides a steel containment installation method and an auxiliary installation device. When the steel containment sub-module is hoisted and in place, the lifting slings can be removed without keeping the lifting slings loaded for about a week, which can greatly shorten the impact of the lifting slings' load on on-site construction.

[0008] A first aspect of the present invention provides a method for installing a steel containment shell. The steel containment shell is assembled and welded from a plurality of submodules. The submodules include an installed in-situ submodule and a hoisting submodule to be installed. The installation method comprises the following steps:

[0009] A plurality of first support members are arranged on the outer side surface of the installed in-place segment module, and a telescopic mechanism is arranged on each first support member;

[0010] A plurality of second support members are provided on the outer side surface of the hoisting segment module to be installed, and the second support members correspond to the installation positions of the first support members on the in-place segment module respectively;

[0011] Use the lifting sling to lift the lifting segment module, and make the second support member dock with the output end of the telescopic mechanism on the first support member respectively;

[0012] Adjust the telescopic mechanism to keep the bottom of the hoisting segment module level;

[0013] Remove the lifting slings and assemble and weld the hoisting segment module and the in-place segment module.

[0014] Preferably, the first support member is welded to the top outer side surface of the seated segment module.

[0015] Preferably, the second support member is welded to the bottom outer side surface of the lifting section module.

[0016] Preferably, the first support members are distributed in an annular manner on the top outer side surface of the in-situ segment module, and the second support members are distributed in an annular manner on the bottom outer side surface of the hoisting segment module.

[0017] A second aspect of the present invention provides an auxiliary installation device for a steel containment shell. The steel containment shell is assembled and welded by a plurality of submodules. The submodules include an installed in-situ submodule and a hoisting submodule to be installed. The auxiliary installation device includes:

[0018] A first support member is provided on the outer side of the in-situ segment module;

[0019] A second support member is provided on the outer side of the hoisting segment module;

[0020] a telescopic mechanism, which is disposed on the first support member;

[0021] Among them, the second support members correspond to the installation positions of the first support members one by one. When the hoisting segment module is hoisted, the second support members can be docked with the telescopic mechanism, and the telescopic mechanism can adjust the bottom of the hoisting segment module to keep it level.

[0022] Preferably, the first support member adopts a first corbel structure, the first corbel structure includes a first support plate, the first support plate is perpendicular to the in-place segment module, and the telescopic mechanism is arranged on the first support plate.

[0023] Preferably, the second support member adopts a second corbel structure, the second support member is symmetrically arranged with the first support member, the second corbel structure includes a second support plate, and the second support plate can be docked with the output end of the telescopic mechanism.

[0024] Preferably, the first support members are distributed in an annular manner on the top outer side surface of the in-situ segment module, and the second support members are distributed in an annular manner on the bottom outer side surface of the hoisting segment module.

[0025] Preferably, the telescopic mechanism adopts a hydraulic jack. After the hoisting segment module is in place, the hydraulic jack can adjust the bottom of the hoisting segment module to keep it level.

[0026] Preferably, the heights of the plurality of first support members on the seated segment submodule are the same.

[0027] The beneficial effects of the present invention are as follows:

[0028] According to the present invention, when the steel containment shell is hoisted and in place, the lifting slings can be removed without having to carry the load for about a week, which can greatly shorten the impact of the load on the on-site construction.

[0029] The present invention can avoid the long-term loading of the sling by arranging the bracket and the hydraulic jack, which can not only improve the construction efficiency but also reduce the operation risk.

[0030] The present invention ensures that the bottom of the hoisting section module remains level and that the assembly welding position of the steel containment shell is accurate by setting the hydraulic jack and fine-tuning the hydraulic jack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application.

[0032] FIG1 is a schematic diagram of the hoisting of a submodule of a steel containment vessel according to a specific embodiment of the present invention;

[0033] FIG2 is a schematic diagram of the installation of the in-situ segment module and the hoisting segment module of the steel containment according to a specific embodiment of the present invention;

[0034] FIG3 is a schematic structural diagram of an auxiliary installation device according to a specific embodiment of the present invention;

[0035] FIG4 is a top view of FIG2 ;

[0036] FIG5 is a flow chart of a method for installing a steel containment shell according to a specific embodiment of the present invention.

[0037] Figure numerals: 100 - steel containment shell; 10 - submodule; 5 - lifting section submodule; 6 - in-place section submodule; 1 - installation auxiliary device; 2 - second support member; 21 - second bracket; 22 - second support plate; 3 - first support member; 31 - first bracket; 32 - first support plate; 4 - telescopic mechanism; 41 - output end; 20 - lifting rigging. DETAILED DESCRIPTION

[0038] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] FIG1 is a schematic diagram of the hoisting of a submodule 10 of a steel containment vessel 100 according to a specific embodiment of the present invention.

[0040] As shown in FIG1 , the steel containment vessel 100 of this embodiment includes a plurality of submodules 10 . FIG1 does not show all submodules 10 , but only shows the installed in-situ segment submodule 6 and the hoisting segment submodule 5 to be installed that are undergoing assembly and connection.

[0041] In the prior art, when assembling the steel containment vessel 100, the hoisting segment module 5 is lifted by the sling 20 and placed directly above the already installed positioning segment module 6. After the hoisting segment module 5 is lowered and fully docked with the positioning segment module 6, the hoisting segment module 5 and the positioning segment module 6 are welded together. During the welding process, the sling 20 needs to be continuously loaded for about a week to maintain structural stability and ensure welding completion.

[0042] The load carried by the sling 20 significantly impacts the work surface, safe and civilized construction, and is prone to accidents. To address these issues, this embodiment provides an auxiliary installation device for the steel containment vessel 100. After the sling 20 hoists the sub-module into place, it no longer needs to carry the load for about a week, significantly reducing the impact of the sling 20's load on on-site construction.

[0043] FIG2 is a schematic diagram of the installation of the in-situ segment module 6 and the hoisting segment module 5 of the steel containment vessel 100 according to a specific embodiment of the present invention.

[0044] As shown in Figures 1 and 2, the lifting sling 20 lifts the lifting segment module 5 and lifts it to the top of the installed segment module 6. After the lifting segment module 5 is lowered and completely docked with the installed segment module 6, the lifting sling 20 is removed, and the lifting segment module 5 is supported by multiple installation auxiliary devices 1 arranged on the installed segment module 6 and the lifting segment module 5. At this time, the lifting segment module 5 and the installed segment module 6 are welded and assembled.

[0045] FIG3 is a schematic structural diagram of an auxiliary installation device 1 according to a specific embodiment of the present invention.

[0046] As shown in FIG3 , the auxiliary installation device 1 includes a first support member 3 , a second support member 2 and a telescopic mechanism 4 provided on the first support member 3 .

[0047] The first support member 3 is arranged on the outer side of the in-place segment module 6, and the first support member 3 can be welded to the in-place segment module 6; the second support member 2 is arranged on the outer side of the hoisting segment module 5, and the second support member 2 can be welded to the hoisting segment module 5. The second support members 2 correspond to the installation positions of the first support members 3 one by one. The telescopic mechanism 4 is fixed on the first support member 3, and its output end 41 faces the second support member 2. When the hoisting segment module 5 is hoisted, the second support member 2 can be docked with the output end 41 of the telescopic mechanism 4, and the telescopic mechanism 4 can adjust the bottom of the hoisting segment module 5 to keep it horizontal.

[0048] In one embodiment, the first support member 3 adopts a first corbel structure, which includes a first support plate 32 and a first corbel 31. The first support plate 32 is perpendicular to the in-place segment module 6. The telescopic mechanism 4 is arranged on the first support plate 32. The telescopic mechanism 4 is fixedly connected to the first support plate 32, which can be specifically connected by bolts.

[0049] The second support member 2 adopts a second corbel structure. The second support member 2 is symmetrically arranged with the first support member 3 . The second corbel structure includes a second support plate 22 and a second corbel 21 . The second support plate 22 can be connected to the output end 41 of the telescopic mechanism 4 .

[0050] The output end 41 of the telescopic mechanism 4 is the side that can be extended and retracted. When adjusting the levelness of the hoisting segment module 5, the hoisting segment module 5 is kept level by adjusting the multiple telescopic mechanisms 4. When the height of one side of the hoisting segment module 5 is higher than that of other directions, the length of the telescopic mechanism 4 at the corresponding position is shortened. Through adjustment, the hoisting segment module 5 and the positioning segment module 6 can be completely connected, and then welded and assembled to ensure assembly accuracy.

[0051] FIG4 is a top view of FIG2 .

[0052] As shown in Figure 4, during actual installation, multiple auxiliary installation devices 1 are required. These devices 1 are distributed in a circular pattern on the outer side of the steel containment vessel. Specifically, first support members 3 are distributed in a circular pattern on the top outer side of the in-place segment module 6, and second support members 2 are distributed in a circular pattern on the bottom outer side of the hoisting segment module 5. Telescopic mechanism 4 is fixed to first support member 3, with its output end 41 facing second support member 2. The circular distribution of multiple auxiliary installation devices 1 evenly distributes the weight of the hoisting segment module 5 across each device 1, providing stability to the overall structure.

[0053] The telescopic mechanism 4 adopts a hydraulic jack. After the hoisting segment module 5 is in place, the hydraulic jack can adjust the bottom of the hoisting segment module 5 to keep it level.

[0054] As shown in Figure 3, a hydraulic jack is fixed to the support plate of the first support member 3, and the support plate of the second support member 2 is correspondingly arranged directly above the support plate of the first support member 3. The first support member 3 and the second support member 2 are arranged symmetrically with respect to the hydraulic jack, that is, the second support member 2 is arranged inverted relative to the first support member 3.

[0055] The first supports 3 are at the same height on the in-place segment module 6, and the second supports 2 are at the same height on the hoisting segment module 5. The second supports 2 are arranged corresponding to the first supports 3, so the number of the second supports 2 is equal to the number of the first supports 3.

[0056] During installation, first assemble and weld the segment module 6 in place, and then use the crane to lift the segment module 5 using the sling 20, so that the second support member 2 on the segment module 5 is docked with the hydraulic jack on the first support member 3. The second support member 2 and the hydraulic jack can be respectively provided with a guide device and a slot, so as to achieve stability and precise positioning of the docking between the second support member 2 and the hydraulic jack. After the docking is completed, the hydraulic jack is fine-tuned to ensure that the bottom of the segment module 5 remains horizontal, ensuring that the assembly welding position of the steel containment shell 100 is accurate. Finally, the sling 20 on the segment module 5 is removed and the assembly welding is carried out.

[0057] When the steel containment shell 100 is hoisted and in place, the lifting sling 20 can be removed. The lifting sling does not need to be loaded for about a week, which can greatly shorten the impact of the lifting sling 20 loading on on-site construction.

[0058] FIG5 is a flow chart of a method for installing a steel containment shell according to a specific embodiment of the present invention.

[0059] As shown in FIG5 , the installation method of the steel containment shell 100 of this embodiment utilizes the above-mentioned installation auxiliary device 1 to weld and assemble the steel containment shell 100. The installation method includes the following steps:

[0060] In step S1 , a plurality of first support members 3 are arranged on the outer side surface of the installed in-place segment module 6 , and a telescopic mechanism 4 is arranged on each first support member 3 , wherein the telescopic mechanism 4 is fixedly connected to the first support member 3 .

[0061] In step S1, the first support member 3 is welded to the top outer side of the in-place segment module 6. The first support member 3 utilizes a corbel structure and includes a first support plate 32 and a first corbel 31. The first support plate 32 is perpendicular to the in-place segment module 6. The sides of the first corbel 31 and first support plate 32 facing the in-place segment module 6 are welded to the outer side of the in-place segment module 6. The telescopic mechanism 4 is mounted on the first support plate 32.

[0062] Step S2 : a plurality of second support members 2 are provided on the outer side surface of the hoisting segment module 5 to be installed, and the second support members 2 correspond to the installation positions of the first support members 3 on the in-place segment module 6 .

[0063] In step S2, the second support member 2 is welded to the bottom outer side of the hoisting section module 5. The second support member 2 adopts a corbel structure and is arranged symmetrically with the first support member 3. The second support member 2 includes a second support plate 22 and a second corbel 21. The sides of the second corbel 21 and the second support plate 22 facing the hoisting section module 5 are welded to the outer side of the hoisting section module 5. The second support plate 22 can be connected to the output end 41 of the telescopic mechanism 4.

[0064] In steps S1 and S2, the first support members 3 are distributed in a circular manner on the top outer side of the in-place segment module 6, and the second support members 2 are distributed in a circular manner on the bottom outer side of the hoisting segment module 5. The multiple annularly distributed installation auxiliary devices 1 can evenly distribute the weight of the hoisting segment module 5 on each installation auxiliary device 1, thereby improving the stability of the overall structure.

[0065] Step S3 : Use the lifting sling 20 to lift the lifting segment module 5 , and connect the second support member 2 with the output end 41 of the telescopic mechanism 4 on the first support member 3 .

[0066] Before hoisting, the output end 41 of the telescopic mechanism 4 (hydraulic jack) must be adjusted to the same elevation. The lifting sling 20 is then used to lower the bottom of the hoisting segment module 5 onto the top of the output end 41 of the telescopic mechanism 4, so that the second support member 2 is positioned corresponding to the first support member 3 and docked with the output end of the telescopic mechanism 4. The second support member 2 and the telescopic mechanism 4 can each be provided with a guide device and a slot to ensure stability and precise positioning of the docking between the second support member 2 and the telescopic mechanism 4.

[0067] Step S4: adjust the telescopic mechanism 40 to keep the bottom of the hoisting segment module 5 horizontal.

[0068] The output end 41 of the telescopic mechanism 4 is the side that can be extended and retracted. When adjusting the level of the hoisting segment module 5, the hoisting segment module 5 is kept level by adjusting the multiple telescopic mechanisms 4. When the height of one side of the hoisting segment module 5 is higher than that of other directions, the length of the telescopic mechanism 4 at the corresponding position is shortened. Through adjustment, the hoisting segment module 5 and the positioning segment module 6 can be fully connected.

[0069] Step S5 , dismantling the lifting sling 20 , and assembling and welding the lifting segment module 5 and the positioning segment module 6 .

[0070] Through the installation method of this embodiment, when the steel containment shell 100 is hoisted and in place, the lifting sling 20 can be removed without having to carry the lifting sling 20 for about a week, which can greatly shorten the impact of the lifting sling 20 on on-site construction.

[0071] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for installing a steel containment shell, wherein the steel containment shell is assembled and welded by a plurality of submodules, wherein the submodules include an installed in-situ segment submodule and a hoisting segment submodule to be installed, characterized in that: The installation method comprises the following steps: A plurality of first support members are arranged on the outer side surface of the installed in-place segment submodule, and a telescopic mechanism is arranged on each of the first support members; A plurality of second support members are arranged on the outer side surface of the hoisting segment module to be installed, and the second support members correspond to the installation positions of the first support members on the in-place segment module respectively; The hoisting segment module is hoisted by using a hoisting sling, and the second supporting member is connected to the output end of the telescopic mechanism on the first supporting member respectively; Adjust the telescopic mechanism to keep the bottom of the hoisting section module horizontal; The lifting sling is removed, and the lifting segment module and the in-situ segment module are assembled and welded.

2. The method for installing a steel containment vessel according to claim 1, characterized in that: The first support member is welded to the top outer side surface of the in-situ segment submodule.

3. The method for installing a steel containment vessel according to claim 2, characterized in that: The second support member is welded to the bottom outer side surface of the hanging section module.

4. The method for installing a steel containment vessel according to claim 1, characterized in that: The first supporting members are distributed in a ring shape on the top outer side surface of the in-situ segment module, and the second supporting members are distributed in a ring shape on the bottom outer side surface of the hoisting segment module.

5. An auxiliary installation device for a steel containment shell, wherein the steel containment shell is assembled and welded by a plurality of submodules, wherein the submodules include an installed in-situ segment submodule and a hoisting segment submodule to be installed, characterized in that: The installation auxiliary device comprises: A first support member, which is arranged on the outer side of the in-situ segment submodule; A second support member, which is arranged on the outer side of the hoisting section module; a telescopic mechanism, which is arranged on the first supporting member; The second supporting members correspond to the installation positions of the first supporting members one by one, respectively. When the hoisting segment module is hoisted, the second supporting member can be docked with the telescopic mechanism, and the telescopic mechanism can adjust the bottom of the hoisting segment module to keep it horizontal.

6. The installation auxiliary device for a steel containment vessel according to claim 5, characterized in that: The first support member adopts a first corbel structure, the first corbel structure includes a first support plate, the first support plate is perpendicular to the in-place segment module, and the telescopic mechanism is arranged on the first support plate.

7. The auxiliary installation device for a steel containment vessel according to claim 6, characterized in that: The second support member adopts a second corbel structure, the second support member is symmetrically arranged with the first support member, the second corbel structure includes a second support plate, and the second support plate can be connected to the output end of the telescopic mechanism.

8. The auxiliary installation device for a steel containment vessel according to claim 5, characterized in that: The first support member is distributed in an annular manner on the top outer side surface of the in-situ segment module, and the second support member is distributed in an annular manner on the bottom outer side surface of the hoisting segment module.

9. The auxiliary installation device for a steel containment vessel according to claim 5, characterized in that: The telescopic mechanism adopts a hydraulic jack. After the hoisting segment module is in place, the hydraulic jack can adjust the bottom of the hoisting segment module to keep it level.

10. The auxiliary installation device for a steel containment vessel according to claim 5, characterized in that: The heights of the plurality of first support members on the seated segment submodule are the same.